International Journal of Systems Applications, Engineering & Development

ISSN: 2074-1308
Volume 13, 2019

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Volume 13, 2019


Title of the Paper: Design and Implementation of a 3-Axis 5-Degrees of Freedom Motion Control IoT Workbench for Multi-Parametric Geo-Mechanics Simulators

 

Authors: Hasan Tariq, Abderrazak Abdaoui, Farid Touati, Mohammed Abdulla E. Al-Hitmi, Damiano Crescini, Adel Ben Manouer

Pages: 203-209

Abstract: Natural calamities involving geo-seismic ground motions are a big challenge for disaster management agencies. The accurate event management drill for structure health management requires very precise ground motion control systems to ensure realistic real-time simulation. In this work, a programmable multi-parametric geo-mechanics motion control system is proposed to improve the accuracy, repeatability and remote generation of ground motions. The mechanics of 4 unique seismic waves, one conceptual and one characteristic earthquake was programmed and tested exhibited in the results section. Precise and safe geo-mechanics from 0.1Hz to 120Hz, velocities 3km/h to 25km/h, and terrestrial inclination magnitudes from 10.000° to 10.000° testified the accuracy of the design. This work bridges geophysics, simulation, automation, and state agencies for calibrating their seismic sensors, training their event detection algorithm and improve their disaster management drills.


Title of the Paper: Digital Contact Tachometer using a Rotary Encoder Input Signal for AC Induction Motor

 

Authors: Pairach Tanuphol, Chaiyan Jettanasen

Pages: 200-202

Abstract: Speed measuring equipment knows as Tachometer is a vital device in a wide range of research; accuracy is the most important for the use of speedometer devices in terms of reliability. This paper is a study of the operation including the control device of the Tachometer and develops the digital contact tachometer compare with the speedometer used in the market in term accuracy and percentage of errors and then compared to the theoretical values. The results show that the accuracy of the proposed equipment is high accuracy and low tolerances and able in practical works, can be applied in industrial applications such as engine control, speed control, mechanical speed control in industrial applications.


Title of the Paper: A Modified Cole-Cole Model Used in the Evaluation of Low-Frequency Electrical Impedance Spectroscopy Measurements

 

Authors: Nina Gyorfi, Lili Nadasdi, Attila Toth, Mihaly Klincsik, Zoltan Sari, Bojan Kuljic, Akos Odry, Peter Odry, Zoltan Vizvari

Pages: 195-199

Abstract: Electrical Impedance Spectroscopy is a widely applied material analysis technique which does not impair functionality nor lead to destruction. The greatest advantage of the cost-effective method is how it assesses the chemical compound of the material analyzed. The data acquired during the measurements are analyzed by equivalent electric models, in which the material parameters correlate with the model parameters. The pre-requisites for the model applied are primarily dependent upon the structure of the analyzed material and the frequency spectrum. Based on the experiments implemented through the considerably large number of low-frequency analyses (< 10 Hz) performed by our research team, we have modified the Cole-Cole relaxation model to fit it as precisely as possible to the low-frequency analyses. The present article demonstrates the modified Cole-Cole model, and includes an experimental measurement to support the efficacy and robustness of the self-developed analysis system and method.


Title of the Paper: Energy Saving Air Conditioner Compressor Control by Speed Controller

 

Authors: Buncha Sreewirote, Chaichan Jettanasen

Pages: 191-194

Abstract: Regarding rapidly economic growth of Thailand, the country needs more energy, especially in the industrial sector needs a keen awareness to speed up energy saving. The various energy conservation projects have been implemented for efficiency and performance improvement, including the value of an investment. This paper presents a principle of operation and behavior of the 36,000 BTU/hrs. Air conditioner compressors modified using the Variable Speed Drive (VSD) to control the speed of the compressor, the experimental results compared between before and after the installation of VSD, the obtained results lead to the energy-saving analysis to evaluate the break-even point, the proposed energy-saving plan is reliable and can be used in the long term.


Title of the Paper: Some Consideration Regarding the Transient Processes of the Kinematical Linkages of Industrial Robots

 

Authors: Ioan Ghimbaseanu

Pages: 187-190

Abstract: The transient duty has a very important role within the kinematical linkages of the numerical control machine tools and industrial robots. The acceleration and deceleration of the movable element of the kinematical linkage participates directly to achieving the positioning accuracy and to the path error. This work presents the main shapes of the acceleration- deceleration curve of the kinematical linkage, as well as their performances. Shapes of the acceleration-deceleration curve are presented for positioning linkages as well as for contouring linkages. The extent of influence upon the contour error in case of the linear and exponential acceleration-deceleration of kinematical linkage is also presented. The works is also giving recommendations on the way of choosing the type of curve being used in case of various transient processes, by the machine tool builders, with a view to obtaining high dynamical performances. In general, the recommendations are considering the inertia of the mobile element and the imposed path error. By knowing the acceleration shape, the machine tool designer and builder can know, even from the design stage, the area of the transient duty where the acceleration is maximal. The maximum acceleration imposes the rate of the impulsion torque of the drive servomotor based on which the kinematical linkage is sized, in terms of its components.


Title of the Paper: An Effective and Robust Self-developed Method in Support of Measuring the Cole-Cole Parameters

 

Authors: Lili Nadasdi, Nina Gyorfi, Attila Toth, Mihaly Klincsik, Zoltan Sari, Bojan Kuljic, Akos Odry, Peter Odry, Zoltan Vizvari

Pages: 183-186

Abstract: The Cole-Cole model is the fundamental mathematical model regarding the Electrical Impedance Spectrum, which is primarily applied to evaluate the majority of the data extracted by this type of measurement method. Since Electrical Impedance Spectrum measurements play a distinguished role in support of our research team, we are now in possession of a self-developed instrument and a self-developed data extracting method. These techniques ensure the extraction of the Cole-Cole model parameters are outstandingly effective and robust. This article intends to demonstrate the strength of the self-developed methods by presenting an experimental measurement method.


Title of the Paper: Police Office Model for Mobile Robotic Systems with Quantum Encryption

 

Authors: Sergey Chuprov, Ilia Viksnin, Julia Kim, Egor Marinenkov, Nikita Shepin, Danil Zakoldaev

Pages: 178-182

Abstract: This paper presents a study on assessment of the effectiveness of the multi-agent robotic system in various variations: without using encryption of messages, transmitted between agents, using “classical” cryptographic algorithms and using messages encryption via quantum cryptographic algorithms. One of the key aspects of the effective functioning of mobile robotics is the maintenance of information security. The analysis of methods and models of information security of multi-agent information systems was carried out. This analysis showed the existence of a large number of methods for ensuring information security of the group, however, many of these techniques related to confidentiality of information cannot guarantee an unambiguous maintenance of this feature. The authors consider the use quantum encryption as one of the most important methods, which guarantees the solution of this problem. Existing approaches to the generation of quantum encryption keys require considerable time. To compare the efficiency of the multi-agent robotic systems the authors developed a software simulator. The time spent by a group of robots to fulfill all the goals was used as a criterion work effectiveness of multi-agent robotic system. On the basis of the obtained modeling results, a conclusion is made about the advisability of using quantum encryption.


Title of the Paper: Low Power Consumption Design for Wireless Charging Self-Starting System

 

Authors: Wenqiang Wei, Xiaodong Zhuang, Nikos E. Mastorakis

Pages: 174-177

Abstract: The self-starting function with low power consumption of the wireless charging system is designed and implemented. The MSP430F5529 is used to carry on AD sampling to the circuit in order to realize the self-starting function, which effectively reduces the power consumption of the control system. The super capacitors are used to store electrical energy, which controls the DC-DC conversion through the TPS63020 chip. The ripple of the output voltage is less than 76 mV, which effectively reduces the power consumption of DC-DC conversion circuit. The experimental results show that the power utilization rate of wireless charging reaches more than 85%, which ensures the stability of the output voltage and reduces the power consumption of the system.


Title of the Paper: Fish Counting in OpenCV using Video Analyses Algorithm for Size 12 Nile Tilapia (Oreochromis niloticus)

 

Authors: John Michael De Jesus, Margret Lim, Dante Nunag Jr., Paul Johansen Pagala, Ramon Garcia, Allan Soriano

Pages: 166-173

Abstract: Most digital image processing methods for fish counting are limited only to clear raw input images. In this paper, we present a detailed correlation analysis between turbidity and accuracy of fish count. The paper is able to provide an accurate number of fishes on fish pens intended for fish dispersals for small scale fisheries and Bureau of Fisheries and Aquatic Resources (BFAR) of the Philippines. This includes fish monitoring and data acquisition. The testing was conducted on the research area provided by BFAR Region IV-A located in Brgy. Bambang Los Baños Laguna, Philippines. The calibration and testing period of the device lasted from December 2018 up to March 2019. The results show no significant difference between manual counting and the device. Thus, the device can be used as an alternative for manual counting


Title of the Paper: Direct Active and Reactive Power Regulation of DFIG using Fuzzy Adaptive PI Controller

 

Authors: Gouabi Hicham, Hazzab Abdeldjebar, Cheriet Ahmed

Pages: 161-165

Abstract: Classic control of grid-connected DFIGs is usually based on either stator voltage oriented, or stator-flux-oriented vector control. Control of instantaneous stator active and reactive powers is then achieved by regulating the decoupled rotor currents, using PI controllers. One main drawback for this control scheme is that the performance highly relies on the tuning of the PI parameters and accurate machine parameters such as stator and rotor inductances and resistances. Thus, performance may degrade when actual machine parameters deviate from values used in the control system.


Title of the Paper: Mobile Robotic Systems with Partially Centralized Control

 

Authors: Sergey Chuprov, Ilia Viksnin, Julia Kim, Danil Zakoldaev

Pages: 153-160

Abstract: The paper discusses the work of mobile robotic systems. To ensure the information security of the system, a model for ensuring information security is proposed. One of the key aspects of ensuring information security is ensuring the confidentiality of information circulating in the system. As technical countermeasures, it is possible to use the organization of the system using police station models. Authors conduct a number of experiments using methods of trust and reputation for analyzing the effectiveness of such a system organization.


Title of the Paper: Enhanced Public Transport Management Employing AI and Anonymous BT Data Collection

 

Authors: Minea Marius, Dumitrescu Cătălin

Pages: 146-152

Abstract: The paper proposes a simple, economic and expandable solution for enhancing the data collection process used in public transport and transport demand management. A non-intrusive and anonymous method is employed to collect an estimative number of passengers in vehicles and public transport stops, along with other, relevant data. Machine learning and specific algorithms are used to improve the data collection process. No specific infrastructure equipment is required.


Title of the Paper: Method of Secure Communication in a Group of Unmanned Aerial Vehicles based on Credit Theory

 

Authors: Iuliia Kim, Ilya Viksnin, Sergei Chuprov, Danil Zakoldaev

Pages: 139-145

Abstract: In this article multi-agent robotic systems are considered in the context of providing information security. Preference is given to decentralized collective strategy of group management due to the opportunity of providing secure and consensual agent interaction with help of common communication channel presence. For the correct and effective functioning of the robotic group there is a necessity in providing security of information transfer via communication channels. In the article the mechanisms of “hard” and “soft” security in robotic systems are described. The emphasis is put on providing pragmatic information integrity, and to avoid violation occurrence in this integrity category the method based on credit theory was developed. The method implies regulation of information volume transferred by agents through establishment of fixed amount for information conventional units per time unit (installment plan). In case of data retention by agent subsequently its payment value is reduced, thus, its indebtedness is increased. In the end of installment plan period agent’s level of trust and reputation is calculated. During introduction into the group of a new agent the credit is determined, due to which the new agent gets from other group members not full information but information reduced by the established interest rate. However, this agent must transmit data in accordance with predetermined installment plan conditions. In the end of credit period the decision whether the new agent is accepted or blocked is made. To assess effectiveness of the proposed method the interaction in robotic group consisted of ten agents was modeled. Two new agents were introduced into the group, and one of them was a saboteur. The threshold value of indebtedness for being accepted to the group is the half of established credit size. Series of independent tests were conducted, in the 90,2 % of them the saboteur was blocked.


Title of the Paper: Taguchi Robust Design as a Way to Determine Optimal Parameters in Rubber Glove Production

 

Authors: Zaharah Wahid, Ming T. Tham, Najiah Nadir

Pages: 132-138

Abstract: In this paper, Taguchi concept of robust process design and classical statistical experimental design methodology are integrated as a way of improving both product quality and efficiency. Hence, yield more consistent and better quality gloves. The aim of this study is to investigate the effect of the inputs on the outputs in the presence of a noise factor and also to choose the best level settings of the control factors that will maximize the mean and minimize the variation in the glove's quality characteristics at minimal cost. The quality characteristic of the rubber glove that was considered in this study was the tensile strength. Taguchi L16 orthogonal array is employed to run the experiments. ANOVA has been performed and compared with Taguchi signal to noise ratio (SNR). mean tensile strength. The BG interaction plays an important role in the mean response. However, factor B is not affected by factor G when it is at high but enhances the strength when both are set at low. Factor A affected both the mean and process variability. The effect of humidity appears insignificant using ANOVA, but is significant in S/N ratio for the mean tensile strength. The preferred optimal setting are: A2B1C1D1F2H1G1.


Title of the Paper: Electromechanical Analyses of a Small BLDC Motor for a Surgical Device

 

Authors: Mingzhe Li, Cheol Kim, Se-Ho Kwak

Pages: 127-131

Abstract: A small BLDC motor is under consideration to operate small dental and surgical hand-pieces instead of low torque air turbines, due to high torque density compared to a size. Electromagnetic analyses were carried out numerically in order to improve the performance of a hand-piece motor such as torque output and torque ripple. Several case studies on the characteristics of electromagnetic torque outputs were carried out by increasing numbers of coil wires from 11 to 30 wound and the maximum motor torque was obtained with 20 wound wires at the electromagnetic angle of 90o. The stator slot made of Teflon was found to be better than steel in the magnetic flux density from a material comparison study. In an effort to reduce torque ripple of the motor, the changes in torque ripples for several slot shapes of a stator were evaluated by finite element analyses and compared. The slot with both circular holes and V-cut showed a best ripple performance that was 6.10%, compared to 7.80% of the current design.


Title of the Paper: Study of the Resistive Bridging Impact on the Delay in QDI Countermeasures

 

Authors: G. Ait Abdelmalek, R. Ziani, M. Laghrouche

Pages: 121-126

Abstract: The present paper highlights the impact of the resistive bridging faults on the delay in secured CMOS 45 nm technology implemented in quasi delay insensitive (QDI) countermeasure. We have analyzed the static and the dynamic behavior of resistive bridges as a function of its unpredictable resistance. We showed that the defect detection depends upon both conditions i.e., the value of the bridging resistance and the vectors that have applied to the circuit entry. The delay estimation induced by the resistive bridging faults is observed and analyzed.


Title of the Paper: An Experimental Study on Dynamic Signage for Autonomous Evacuation Navigation System: The Effectiveness through User's Perception

 

Authors: Khyrina, Airin Fariza Abu Samah, Burairah, Hussin, Abd Samad, Hasan Basari

Pages: 113-120

Abstract: Current existing static signage system (SSS) used to guide the occupant’s wayfinding to the nearby main exit. Yet, it does not navigate to the safest and shortest route direction. This situation has led the evacuation process become more critical and challenging, especially when they were getting into traps at the spreading hazardous location. Thus, a dynamic signage system (DSS) in the autonomous evacuation navigation system (AENS) is proposed to overcome this problem. Through the system, it will block the hazardous area, provide the safe route information and navigate the occupants to the nearest exit. The effectiveness were verified and evaluated via 6 sets of experiments using SSS and DSS in two different floor plan layout. There were 30 participants involved and run the specific experiment, which consists of 2 groups of occupants; 10 familiar and 20 unfamiliar. After the completion of the experiment, they were required to fill-up a set of survey regarding their understanding and satisfaction of the proposed system. The result obtained shows a difference significant on the time taken to the nearest staircase, between familiar and unfamiliar occupants. Nonetheless, all the participants showed a 100% satisfaction towards the effectiveness of DSS implemented in the AENS


Title of the Paper: The Integrated Method for Drying Agricultural Products

 

Authors: Karin Kandananond

Pages: 109-112

Abstract: The preservation of agricultural products is the most important issue in order to prolong the shelf life of products on the market. One of the commonly used methods is the application of hot air drying directly to products. Another method is the utilization of infrared tube as the source of heat transmission. Both methods have pros and cons. As a result, this research focuses on the integration of these two methods in order to fulfill the gap of each individual method. To validate the efficiency of the proposed method, the experiments are conducted to measure the moisture content of two agricultural products, tomatoes and pineapples. The results show that the integrated method is able to decrease more moisture content of products than two traditional methods.


Title of the Paper: Studying Kenaf Core Drying Uniformity in a Tray Dryer Through CFD

 

Authors: S. Misha, S. Mat, M.A.M. Rosli, M.H. Ruslan, E. Salleh, K. Sopian

Pages: 101-108

Abstract: Application of tray dryer is widely used in agricultural drying because of its simple design and capability to dry products at high volume. However, the greatest drawback of the tray dryer is uneven drying because of poor airflow distribution in the drying chamber. Implementing the proper design of a tray dryer system may eliminate or reduce non-uniformity of drying and improves drying performance. This study investigates kenaf core drying uniformity in a tray dryer through Computational Fluid Dynamics (CFD) simulation. The simulation focused on air velocity above the products and was conducted under steady state condition to simplify the analysis. Product trays were assumed to be porous media for airflow. The experimental and simulation data exhibit very good agreement. The drying rate of dried products in each tray was predicted based on average air velocity from the simulation. The result shows that, the higher the air velocity, the higher the drying rate of the products. The alternate arrangement of tray position was adopted to ensure that all trays are exposed directly to drying air and to improve airflow distribution in drying chamber. There was a variation of final moisture content for product at different columns. As the distance of product far from the air inlet, the air velocity decreased. However the uniformity of air flow distribution to each level of product at the same column are acceptable. CFD simulation is very useful to predict the airflow distribution throughout the drying chamber with reliable results and cheaper cost. Drying using semicontinuous mode was recommended to improve drying time and uniformity.


Title of the Paper: Computational Simulations on Drug Particle Transport in a Clotted Channel for Biomedical Applications

 

Authors: Prativendra Singh, Shashi Sharma, Anurag Gaur, Paras Ram

Pages: 96-100

Abstract: The present work reports the computer simulations performed to study the effect of drug particle transport within a fluid on velocity and pressure profile in a clotted channel. The fluid along with drug particles is flowing in a clotted channel, which is considered as a simulated blood vessel. The fluid flow is defined using Navier-Stokes equation and particle motion through Newton’s second law equation. The governing nonlinear partial differential equations are solved using COMSOL software based on finite element method. Results illustrate that the velocity and pressure changes significantly when drug particles strike on the clot present in the channel. It is observed that velocity and pressure both decrease as particles move ahead from the clotted region in the channel.


Title of the Paper: Dynamic Interaction of Conventional and Storage Power Plants in a Single Power System

 

Authors: Harald Weber, Nayeemuddin Ahmed, Martin Topfer, Paul Gerdun, Vinaykumar Vernekar

Pages: 90-95

Abstract: It is expected that most of the conventional power plants of today will gradually be replaced by a complete inertialess system. These new power stations will possess storages for different generation speed together with power electronic converters. However, some of the conventional thermal and hydro power stations will remain in operation and act as base power plants in the power grid. Thus, in this paper, a method is proposed which will govern the electrical power distribution in a network containing both conventional and the novel storage power stations. All the control principles existing today involving spinning reserve, primary control and secondary control depending on frequency are substituted by a comprehensive angle control of the nodal voltages in the transmission and distribution network. With this control method in place, whenever there is a change in the power requirement of the network, the power plants react instantly with the ones closest to the point of disturbance providing the greatest response. The slack storage power plants are able to react faster than conventional ones and can also build up their power reserve during periods of excessive power generation from renewable sources. Not only does this method help to produce more power closer to the point of load demand reducing the stress on the generators located further away but it also improves the controllability of conventional power plants leading to lower system losses.


Title of the Paper: Reference Position Estimation for Prosthetic Elbow and Wrist using EMG Signals

 

Authors: Neelum Yousaf, Zareena Kausar, Syed Ali Usama

Pages: 83-89

Abstract: Progress in Bio robotics has provided several ways to mimic the form and function of human limbs, thus allowing the scheme of better prostheses for amputees. This paper presents EMG based Human Machine Interface framework to estimate reference positions of a prosthetic arm for patients suffering from above elbow amputation. In the present study, a set of information about four basic motions regarding elbow flexion/extension along with the twist of radius and ulna referred as pronation/supination is acquired from bicep of a human arm. Upon muscle activation, the numerical data set points representing the electromyographic intentions were recorded using the Thalamic Labs product i.e. Myo Armband. To analyze these acquired signals, feature selection followed by feature extraction was done in order to classify the input data extracted from human muscle. Artificial Neural Network (ANN) is used for classification and the performance of four motion classification is evaluated. A mathematical model of kinematic of a trsanshumeral arm based on Denavit-Hardenberg convention is presented using Matlab®. Analytical results of the forward kinematic model are verified using Matlab® PeterCorke® Robotic toolbox. A physical significance of proposed work is tested through the information of forward kinematics from Matlab® linked with that of Solid works simulated with reference to the EMG intentions captured and classified to generate the reference positions. The classification accuracy obtained from ANN i.e. 91.9% is found significant with p<0.01 for a group of ten healthy subjects. This verifies usability of the proposed technique.


Title of the Paper: A Simple BJT based Circuit for Generating Chaotic Oscillations and Double-scroll Attractors

 

Authors: Umesh Kumar, Anshuman Chhabra

Pages: 79-82

Abstract: A simple BJT based circuit for generating chaotic waveforms is proposed in this paper. The simple circuit consisting of two BJTs, two diodes, nine resistors, two capacitors and an inductor, is based on Chua’s circuit. The circuit is observed to exhibit the chaotic Double-Scroll attractor pattern as well as non-periodic oscillating current and voltage waveforms during SPICE simulations. The working of the circuit is analyzed and mathematical formalisms are developed to explain the chaotic phenomena so observed. It is seen that the chaotic waveforms are generated as a result of a nonlinear relationship between the current through the inductor and the voltages across the capacitors. These are mathematically modeled as a system of nonlinear differential equations and are presented in the paper along with the observations obtained.


Title of the Paper: EMG Control of a 3D Printed Myo Electric Prosthetic Hand

 

Authors: Umer Farooq, Usman Ghani, Syed Ali Usama, Neelum Yousaf Sattar

Pages: 73-78

Abstract: Recent technological advances have enabled the prosthetic developers to derive an ideal replacement for the human arm in near future. This research presents design of a 3D Printed Myo Electric Prosthetic Hand that grasp symmetrical objects through Electromyographic signals and is intended for people suffering from Transradial Amputation. In the current study, a set of data about three motions that include hand open, close and rest position was been acquired from forearm muscles of a human arm. CAD model of the prosthetic hand was developed in SolidWorks® which was later 3D printed using Poly Lactic Acid (PLA).The proposed design was based closely on tendon actuation, related to human hand functionality. Signal acquisition and processing has been done using Myo Armband. Different features were selected such that they can be passed through classification process in order to control the hand motions. Using the Bluetooth transmitter, the filtered data was sent and saved in Arduino Uno® controller. Later, the Support Vector Machine (SVM) was been evaluated as a classifier. The classification accuracy obtained from SVM was 96.7%. The results were found significant (p<0.01) for twelve able bodied subjects. EMG based grasp control was implemented with successful testing of designed prosthetic hand for three different motions. The functional utility of the Myoelectric Hand was demonstrated by grasping household objects such battery charger, wallet and water bottle.


Title of the Paper: Sensors, Actuators, and Devices in Cardiovascular Systems

 

Authors: Imad Al Hmouz, Amir Molaei, Javad Dargahi

Pages: 65-72

Abstract: This paper presents a literature as well as technology review of the most recent conducted research efforts and technology achievements in the cardiovascular treatment field. This review is aimed at providing future researchers and developers with major highlights on efforts and achievements in direct relation to sensors, actuators, and devices as applied to cardiovascular system monitoring, mapping and imaging, diagnosis, and treatment. The review concludes by indicating areas of high importance and future potential for further investigation and by listing future investigation topics as considered of special interest to the author.


Title of the Paper: Development of Automatic Clutch Manual Transmission for Automotive Applications

 

Authors: Chia-Wei Chang, Shih-Chin Yang, Po-Huan Chou

Pages: 60-64

Abstract: The automotive electronics have made a great progress nowadays. In order to improve the convenience of driving and the efficiency of energy usage, many vehicle manufacturers have paid attention on electric motor controlled systems to improve the system efficiency and control accuracy. The replacement of traditional brush electric motors or mechanical motors by using brushless motors has become an important on vehicle subsystems. Specifically, Field Oriented Control (FOC) of brushless motors have become a promising solution for high-performance drive systems. This paper proposes an Automatic Clutch Manual Transmission (ACMT) system based on a brushless motor and FOC drive. In order to implement a manual shifted automatic clutch system, a systematic clutch control logic is designed by organizing control rules under various driving conditions. In addition, a clutch friction model is used to increase the degree of perfection. Finally, an ACMT system test bench is built to evaluate the automatic clutch control under different vehicle test conditions.


Title of the Paper: Electrical Conductivity of the Thin Films Grown by Random Shaped Clusters

 

Authors: Zh. Ebrahiminejad, S. Farhad Masoudi, H. hamzehpour

Pages: 56-59

Abstract: In present work, using Monte Carlo technique, a rough and porous thin film recently simulated by deposition of randomly shaped clusters with different sizes on an initially flat substrate. The scaling exponents are calculated and found to agree with the ballistic deposition model. Then, effect of cluster size on the scaling exponents is studied. Moreover, the bulk porosity and its dependence on time and cluster size are also surveyed. As the behavior of film’s conductivity affects by its morphology, in continue, the electrical conductivity of these porous solid films which grown by random shapes and sizes clusters is investigated. The conductivity is computed as a function of several relevant parameters. Based on our results, the frequency-dependent effective conductivity is a decreasing function of the cluster’s sizes, such as porosity. The effective conductivity and dc conductivity depends on the frequency and the clusters sizes through a power law, respectively.


Title of the Paper: Design of Differential 130nm CMOS Low Noise Amplifier

 

Authors: M. Muhamad, N. A. A. M. Ali

Pages: 51-55

Abstract: This paper presents a Differential Low Noise Amplifier (LNA) circuit design using 0.13um RFCMOS technology. The LNA operating at 2.4 GHz frequency band. A good quality of LNA should has noise figure (NF) that low, high gain, wide band width and low power consumption. The differential Low Noise Amplifier proposed provide high gain, low noise and it provide large superior out of band IIP3. A cascade output stage was added in the differential LNA to the Single-ended source degenerated source. At the drain of the main transistor, an inductor is added to reduce the noise contribution of cascode transistor. In a Differential cascode LNA, at the gate of the cascode transistor another inductor is connected to reduce the noise and to increase the gain of the cascode transistor. Besides that, the power gain of the LNA can be increase and reduce power consumption.


Title of the Paper: Studies Regarding Finishing and Work Hardening the Internal Surfaces by Radial Vibratory Rolling Method

 

Authors: Badea Lepadatescu

Pages: 46-50

Abstract: The paper presents a series of studies regarding the influence of the main constructive and cinematic parameters of the finishing-work hardening tools, on the durability of these tools and on the productivity of the manufacturing process. Thus, is studying the influence of the diameter of the rolling elements (balls) and the angle of the pressure cones "α" on the productivity of the machining, as well as the influence of the ratio between the pulsation of the rolling elements and the rolling speed, on the distribution of the unitary efforts, respectively on the durability of the tools used.


Title of the Paper: The Acceleration or Deceleration Curve of the Kinematical Linkage of the Numerical Control Machine

 

Authors: Ioan Enescu

Pages: 42-45

Abstract: The transient duty has a very important role within the kinematical linkages of the numerical control machine tools and industrial robots. The acceleration and deceleration of the movable element of the kinematical linkage participates directly to achieving the positioning accuracy and to the path error. This work presents the main shapes of the acceleration- deceleration curve of the kinematical linkage, as well as their performances. Shapes of the acceleration-deceleration curve are presented for positioning linkages as well as for contouring linkages. The extent of influence upon the contour error in case of the linear and exponential acceleration-deceleration of kinematical linkage is also presented. The works is also giving recommendations on the way of choosing the type of curve being used in case of various transient processes, by the machine tool builders, with a view to obtaining high dynamical performances. In general, the recommendations are considering the inertia of the mobile element and the imposed path error. By knowing the acceleration shape, the machine tool designer and builder can know, even from the design stage, the area of the transient duty where the acceleration is maximal. The maximum acceleration imposes the rate of the impulsion torque of the drive servomotor based on which the kinematical linkage is sized, in terms of its components.


Title of the Paper: Model of Servo Drive System to Increase Performance of Machine Tools

 

Authors: Ioan Ghimbaseanu

Pages: 32-41

Abstract: In the application of mechatronic positioning systems (also known as CNC axes) it is desirable to predict the servo performance. By using computer simulation techniques it is possible to construct a very accurate model of the servo drive. It is possible to observe the effect on performance by changing the drive parameters such as load inertia, backlash, stick-slip, viscous friction, load thrust, servo loop gains, velocity and acceleration. This paper deals with a model of a numerically controlled mechatronic system which consists of a motion control system driven by a D.C. motor. Both position and velocity feedback loops are present in the structure of the system. By means of MATLAB & Simulink software, simulation diagrams were built in order to test the behavior of the system in positioning regime. An analytic tuning of the position controller was performed prior to the simulation. Two velocity profile were used for testing the position behavior of the system: the trapezoidal profile and the parabolic one. The results in the case of the parabolic velocity profile were satisfactory: even if the positioning error has quite a high value it was constant and easy to compensate by introducing it as an offset value in the memory of the NC equipment. The analytic tuning, however, fails in the case of the trapezoidal profile. The system oscillates a lot and the positioning error was inconstant and subsequently cannot be compensated. In order to compensate the behavior of the system two solutions were adopted: re-tuning of the position controller using the “continuous emulation tuning method” and using a 16 bit DAC instead of a 14 bit one. The compensated system performed well during the simulation in both cases, the trapezoidal profile being usable in this case with satisfactory results.


Title of the Paper: Researches on Cutting Tools Which Have the Cutting Surface Made of Polycrystalline Diamond

 

Authors: Mihaela Popescu

Pages: 28-31

Abstract: The multitude of cutting materials already in existence increased further with the appearance of polycrystalline diamond (PCD) some 25 years ago. Ceramic show no chemical affinity to most machining materials, but are very brittle. Natural diamond, the hardest known material, is very wear resistant, but also sensitive to impacts and difficult to shape. The main advantage brought about by the development of polycrystalline diamond is the partial combination of the exceptional hardness of diamond with the toughness of tungsten carbide. This paper is presenting a series of the general considerations on cutting tools which have the cutting surface made of polycrystalline diamond. There are also presented some original results concluded by the author, based on experiments made with the tools mentioned before, which have different design values.


Title of the Paper: Hidden Human Detecting Behind a Concrete Wall by using Microwave Imaging

 

Authors: Lotfi Merad, Laarej Merad, Sidi Mohammed Chouiti, Sidi Mohammed Meriah

Pages: 25-27

Abstract: In microwave imaging systems, high resolution and good penetration of the electromagnetic (EM) waves inside materials are required. The work presented in this article is based on the use of image processing methods in order to reduce the noise that occurs in reconstructed images from a microwave imaging systems. The goal is to apply processing operations such as dilation and erosion on the reconstructed image. The focus has been on the detection of a human being hidden behind a wall. Simulation results show an improvement in image quality compared to the original image and a significant reduction in noise.


Title of the Paper: Applying Cell Transmission Model for Solving Urban Traffic Jams

 

Authors: Y. S. Huang, C. C. Ho, B. Y. Xie

Pages: 20-24

Abstract: Cell transmission model (CTM) is useful for evaluating the performance of urban traffic networks due to its mathematical formalism. This work explores an extend traffic control policy for dispersing the problem of the incident-based traffic jams. For this purpose, the authors employ CTM to analyse of an urban traffic jam problem. CTM is useful for evaluating the performance of urban traffic networks due to its mathematical formalism. In this paper, the MATLAB platform is used to design a traffic simulation tool based on CTM, which successfully simulates the propagation and dispersion of traffic congestion caused by an accident. This work explores the application of CTM to develop control strategies for dispersion accident-induced traffic jams and evaluates the efficiency of these strategies.


Title of the Paper: Prevention of Work Accidents and Occupational Risk

 

Authors: Dumitrascu A. E.

Pages: 15-19

Abstract: In the present paper are detailed the processes for identifying the risk factors, assessing and prioritizing the specific professional risks in order to identify and establish measures meant to protect the health and ensure the safety of the workers. The case study refers to the identification of the professional risk factors specific to the analyzed process, their quantification, monitoring and control in order to prevent occupational accidents and diseases. The results of the assessment indicate that the estimated level of risk for the three components of the analyzed system of work generates risks of occupational and professional health that exceed the acceptable level.


Title of the Paper: Access of Visually Impaired People to Cultural and Historical Heritage using Braille Visualization

 

Authors: D. Karastoyanov, N. Stoimenov

Pages: 10-14

Abstract: The paper presents a new technology for access of visually impaired people to graphical information using Braille display. In the state of the art are shown different existing devices, realized ideas and conceptual models. The technology for graphical Braille display on the base of linear electromagnetic micro drives is shortly described. Previous experience of the team is shown, including tactile tiles representing tapestries of “Pavia Battle 1525”. Future steps for development of the described above Braille display technology are considered.


Title of the Paper: Measurements of Particle Emissions and Size Distributions from a Modern Residential Pellet Stove under Laboratory Conditions

 

Authors: M. Obaidullah, S. Bram, J. De Ruyck

Pages: 1-9

Abstract: This paper presents experimental results of particle emissions obtained from a modern bottom feed pellet stove of 5 kW output in nominal heat and 2.5 kW in part load output using a state of the art instrument Electrical Low Pressure Impactor Plus (ELPI+) with the fourteen stages from 6 nm to 10 µm. The combustion experiments were conducted in a stove manufacturing plant in the southern part of Belgium. Two experiments (A and B) in part load and four experiments (C, D, E and F) in nominal load output were conducted for the emissions measurements. The stove was operated in different fan speeds, which regulate air flow into the combustion chamber. The particle emission results include of mass concentrations of two size fractions PM1 and PM2.5, number concentrations and their particle size distributions evaluated in this paper. The experimental results show that the PM1, PM2.5 and particle number concentrations vary from one experiments to another due to the difference of fuel consumption, different fan speed settings of the screw, which regulate air flow into the combustion chamber. Particle mass size distributions analysis show that all the experiments have maximum particle concentrations in the fine mode mainly at the particle size about 320 nm for the startup and combustion phase and 300 nm for the burnout phase. Particle number size distributions analysis show that the peak particle concentration was observed for all the experiments between 25 nm to 70 nm for startup phase, 70 nm to 100 nm for the combustion phase and 20 nm to 80 nm for the burnout phase.