International Journal of Circuits, Systems and Signal Processing

ISSN: 1998-4464
Volume 13, 2019

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of NAUN Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

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Volume 13, 2019

Title of the Paper: Design of Fractional Order PID Controller for Induction Motor Speed Control System by Cuckoo Search


Authors: C. Thammarat, D. Puangdownreong

Pages: 92-96

Abstract: The non-integer (fractional) order PID (FOPID or PI^(λ)D^(μ)) controller was introduced almost two decades and demonstrated to perform the better responses in comparison with the conventional integer order PID (IOPID). The design of an optimal FOPID controller for induction motor speed control system by the cuckoo search (CS), one of the most efficient metaheuristic optimization search techniques, is presented in this paper. Based on the modern optimization framework, five parameters of the FOPID controller are optimized by the CS to meet the response specifications of the three-phase induction motor (3φ-IM) speed control system defined as particularly constraint functions. Results obtained by the FOPID controller are compared with those obtained by the IOPID designed by the CS. As simulation results, the FOPID can provide superior speed responses to the IOPID, significantly.

Title of the Paper: Interaction between Aliasing and Antialiasing Effects in Differentiating Smooth Band-Unlimited Signals


Authors: Vairis Shtrauss

Pages: 85-91

Abstract: We study aliasing and antialiasing effects occurring in discrete-time differentiation of a smooth band-unlimited signal – so-called the Cauchy pulse through evaluation of differentiation errors for low frequency portion (LFP) bellow the Nyquist frequency and high frequency portion (HFP) above the Nyquist frequency produced by type IV linear phase differentiators designed by different methods with varying differentiators’ lengths, sampling and band-limiting frequencies. We demonstrate that differentiation of HFP creates an aliasing error equal to the error of the computed HFP of the derivative, whereas removing HFP causes an algorithm-independent antialiasing error equal to HFP of the exact derivative with minus sign. Both errors are in a balance and determine the common error introduced by the band-unlimitedness. We disclose that regardless sampling frequency the antialiasing error in the differentiation is greater than the aliasing one. The differentiators designed by various methods approximately equally compute HFP with nearly equal aliasing errors having a weak dependence on differentiator length, at the same time, LFPs are differentiated with very wide variation in the accuracy. It is demonstrated that the differentiators with smooth magnitude responses at low frequencies compute considerably more accurate derivatives of LFPs than those having rippled responses.

Title of the Paper: Application of Cuckoo Search to Synthesize Analog Controllers


Authors: B. Wongkaew, D. Puangdownreong

Pages: 79-84

Abstract: In modern optimization, the CS was firstly proposed in 2009 to solve both continuous and combinatorial, single-objective and multi-objective optimization problems. It has been accepted and widely applied to solve several real-world engineering problems. In this paper, the CS is conducted to synthesize the analog controllers most commonly used in various control applications, i.e. Lead-Lag compensator, PID controller and PIDA controller. In this work, such the controllers are considered to be realized by analog electronic circuits using only one operational amplifier. The proposed synthesis approach can be determined as one of the constrained optimization problems. As results, it was found that the CS can effectively synthesize Lead-Lag compensator, PID controller, and PIDA controller satisfying to the predefined objective and constrained functions.

Title of the Paper: The Impact of Crisis Situations to the Transport Service of the Territory for the Selected Hospital


Authors: P. Viskup, K. Vichova

Pages: 73-78

Abstract: Several cities in the Czech Republic have a traffic problem. We see a growing number of road vehicles, resulting in traffic accidents and traffic accidents. The traffic situation is fundamentally affected by crisis situations. If a crisis occurs - floods, the path is often flooded. An even more significant problem arises when a flooded road separates the city from two islands. It is, therefore, necessary for the city to address this problem. At the time of the crisis, it is essential to plan different routes for evacuation or supply. Before the city decides to make a change in the transport system, it is necessary to make a simulation to determine if the proposed system will be useful and help in the traffic situation of the city. The aim of the paper is to analyse the impact of crisis situations to the transport service of the territory for the selected hospital. In the introduction, there is a literature review of the problem of transport service in times of crisis and simulation traffic service. In the next part, there was analyse the transport operation of the hospital Uherské Hradiště. As a central part of the paper is a case study which solves the traffic situation in the nearest part of the hospital with the critical points of the solution. In the paper, there was used the software PTV Vissim as a first method. The second used method is Digital Flood Plan of the Czech Republic. At the end of the paper, there we can see the results from this software and digital plan.

Title of the Paper: A WSN Clustering Algorithm for Micro-grid


Authors: Bin Cai, Bin Wang, Yi Shi, Xiao-Hui Li

Pages: 66-72

Abstract: Considering the practical situation when applying the wireless sensor network to the micro-grid, the unbalanced energy consumption among the nodes will lead to the problem of blind areas, poor monitoring quality and the short lifetime of the monitoring network, an uneven clustering algorithm based on the real-time energy of the nodes for the state and information monitoring network of micro-grid was proposed. In the proposed algorithm, the flag bit and the real time node energy factor were introduced to the calculation of the cluster head competition radius, and the clustering judgment factor was applied to realizing dynamic and unequal clustering of the network. The algorithm balanced the energy consumption by choosing the node with sufficient real-time energy and low communication cost as cluster head. Simulation results show that the proposed algorithm can more efficiently balance the energy consumption, make the death nodes distribute evenly, improve the quality of network monitoring and prolong the network lifetime.

Title of the Paper: Optimal PIDA Controller Design for Three-Tank Liquid-Level Control System with Model Uncertainty by Cuckoo Search


Authors: T. Jitwang, A. Nawikavatan, D. Puangdownreong

Pages: 60-65

Abstract: In industrial applications, the three-tank (3-tank) liquid-level control commonly exists under the PID control loop. However, the PIDA could provide better responses than the PID for higher order plant. In this paper, an optimal PIDA controller design for 3-tank liquid-level control system with model uncertainty by cuckoo search (CS) is proposed. The CS, one of the most powerful population-based metaheuristic optimization search techniques, is conducted to optimize the PIDA’s parameters based on modern optimization context. The CS-based PIDA design framework can be considered as the constrained optimization problem. Model uncertainty is occurred due to aging and environmental effects. As results, it was found that the PIDA controller designed by the CS provides the very satisfactory responses of the 3-tank liquid-level controlled system with model uncertainty superior to the PID controller.

Title of the Paper: Grayscale Enhancement of Spiral CT Scan Image of Human Spinal Skeleton


Authors: Shufeng Jiang, Fengjuan Wang, Fansong Meng

Pages: 53-59

Abstract: The digitalization of human scanning information is the support technology of modern medical instrument detection and analysis, and the data acquisition and processing of human skeleton is the premise of human information digitization. It is the key link of reverse engineering technology, and also the basis of human skeleton reverse reconstruction. In this paper, the image data of human spine skeleton is obtained by spiral CT scanning, and an effective gray enhancement algorithm is used to enhance the image data of the human spine skeleton, which provides technical support for the later 3D reconstruction. The measurement of human bone surface data refers to mapping its shape information into geometric coordinates or two-dimensional image information of discrete points through specific measurement methods and measuring equipment. Through comparative analysis, we use high accuracy and advanced technology spiral CT scanning to get human spine and skeleton image data. Based on grayscale theory, an efficient algorithm is constructed, which includes histogram equalization, grayscale transformation, smoothing, sharpening and edge detection. The algorithm can effectively enhance the image features from different angles and different methods, so that the bone feature data can be extracted more quickly and accurately in the subsequent 3D modeling process. The results of the algorithm and technology integration show that the processing features of CT image data are compared with other non obvious regions and the image feature data are more accurate. The results show that the gray image enhancement algorithm is more suitable for human tissue image enhancement than other algorithms, and provides better image data processing support for 3D reconstruction of bone model.

Title of the Paper: Project Management Methods in Conditions of Business Companies in the Czech Republic


Authors: Pavel Taraba

Pages: 46-52

Abstract: The paper aims to evaluate the application of project management methods in conditions of business companies in the Czech Republic. In the introduction part, project management competencies and selected methods based on an analysis of available information resources are defined. The separate parts of this article are dedicated to the project management software using in the project management. The main theoretical background of the paper is based on documents Individual Competence Baseline ICB version 4.0 and PMBOK® Guide 6th Edition. With the use of a questionnaire survey, the level of application of project management methods in conditions of business companies in the Czech Republic was evaluated. The questionnaire survey was conducted in four stages; the first carried out in 2015, the second in 2016, the third in 2017 and the final stage in 2018. Two research questions were formulated. 1) Are the methods of project management applied in most of the surveyed companies at a “very high” or at a “high” level? 2) Is it possible to observe a growing trend in the application of project management methods in the period 2015-2018 in the surveyed companies? Based on a comparison of the results of the individual analyses, it is possible to describe the development of the application of the project management methods over the past four years.

Title of the Paper: An Improved Solution for Multimedia Traffic in NIDS based on Elitist Strategy


Authors: Xu Zhao, Jin Jiang, Reza Mousoli

Pages: 40-45

Abstract: Omission is inevitable, when the network traffic exceeds the load capacity of Network Intrusion Detection System (NIDS). In this case, dangerous packets should be given priority to processing. Since the large proportion of multimedia packets in traffic, the multithreading solution for multimedia packets has been proposed in NIDS. However, due to the use of roulette wheel selection, there is a possibility that the multimedia packets with high danger coefficient will be missed during the selection process. In this paper, the selection operator is improved by the elitist strategy, and new processing steps in the solution is proposed. When omission occurs, this improved model can choose more dangerous multimedia packets for processing within the maximum processing capacity of different threads. Experimental results indicate that this model can help NIDS to improve its detection rate for dangerous multimedia packets effectively.

Title of the Paper: Optimal Design of Two-Degree-of-Freedom PIDA Controllers for Liquid-Level System by Bat-Inspired Algorithm


Authors: K. Lurang, C. Thammarat, S. Hlangnamthip, D. Puangdownreong

Pages: 34-39

Abstract: Regarding to control theory, the degree of freedom of a control system is defined by the number of control loops that can be adjusted independently. Traditionally, the one-degree-of-freedom (1DOF) control system has been widely conducted due to ease of use and simple realization. However, the design of control system depends on two main purposes, i.e. command-tracking and disturbance-rejecting. Two-degree-of-freedom (2DOF) control system has advantages over 1DOF for this scheme. In this paper, an optimal design of 2DOF-PIDA controllers for the liquid-level system by the bat-inspired algorithm (BA) is proposed. With BA-based, reponses of controlled system by the 2DOF-PIDA controllers are compared to those by the 1DOF-PIDA. As results, the 1DOF-PIDA and 2DOF-PIDA controllers can be optimally designed by the BA. Results show that, with 2DOF-PIDA control structure, the commandtracking and disturbance-regulating responses of the liquid-level system can be controlled effectively and independently.

Title of the Paper: Bulk Acoustic Resonator Devices using ZnO-Based Film and Back Cavity


Authors: Xin Li, Mengwei Liu, Yanlu Feng

Pages: 28-33

Abstract: The purpose of this study was to investigate bulk acoustic resonator (FBAR) devices using ZnO-based film and back cavity. A Mason equivalent circuit model was adopted to simulate the impedance characteristics of FBAR devices. The influence of piezoelectric material thickness, electrode thickness, and resonance area on the impedance characteristics of FBAR devices was analyzed. Structural parameters of the FBAR devices were designed, and bulk silicon micromachining was applied to fabricate Al/ZnO/Al-based FBAR devices with a back cavity. X-ray diffraction analysis shows that ZnO piezoelectric films have a highly preferred c-axis orientation. The frequency response of longitudinal wave FBAR devices has been measured by an RF network analyzer, and the results indicate the series resonant frequency and parallel resonant frequency of the fabricated FBAR devices determined to be 1.546 GHz and 1.590 GHz, respectively, which are close to the simulated results. According to the measured results, the effective electromechanical coupling coefficient and the quality factor have been calculated to be 6.83% and 350, respectively. The findings of this study may serve as reference for the development of FBAR devices.

Title of the Paper: Improvement the Post-Processing Quality in Lock-in Thermography


Authors: Anna V. Stoynova, Borislav B. Bonev

Pages: 20-27

Abstract: Active thermography is widely used method for non-destructive testing. In contrast to passive thermography, in active thermography using of raw data post-processing is necessary in all cases, especially in lock-in thermography. In lock-in thermography, defects cause thermal wave phase difference between defect and sound area. Aim of the post-processing is to calculate phases correctly for each pixel from raw thermogram sequence. Typically, the processing is performed on a part of the thermogram sequence and the question arises as to how to select this part. Depending on the used part of the thermogram sequence for the post-processing, the searched defects in some cases cannot be detected despite the sufficient phase difference between the defect and sound area for their detection is present. The aim of this study is to investigate the impact of this and other factors on the quality of the post-processing (evaluated with phasegram quality) and to define an algorithm for improving the quality of the post-processing. Modelling and real thermographic measurements were used to investigate this influence. The results from modelling and from real lock-in thermography measurements shows that by using of the proposed methods can be avoided decreasing of defects detectability caused by post-processing. It is proposed algorithm including proposed methods for contrast increasing. The problems associated with phasegram sharpness and phasegram pixel saturation are presented.

Title of the Paper: Research and Optimization of OpenStack Virtual Machine Resource Scheduling Technology


Authors: Jun Zhao

Pages: 13-19

Abstract: Cloud computing is a new business model of information technology. It services clients with the visualized hardware infrastructure resources in dynamic and flexible ways. The suppliers increase the input for infrastructure because of the high popularity of the service, leading to increased energy consumption and carbon emission. To reduce energy consumption and improve resource utilization rate, it is urgent to select proper physical resource distribution and virtual machine dispatching means. This study analyzed OpenStack cloud platform, proposed multi-objective ant colony optimization algorithm for multi-objective optimization issue and redesigned the resource scheduling model of server to efficiently satisfy user requirements. Moreover other algorithms including first fit algorithm, least residue algorithm and conventional ant colony algorithm were simulated. The experimental parameter conditions included 100 physical nodes, a physical host (CPU computing power array: (1000, 1500, 2000); internal storage: 4 GB; storage: 1 TB; bandwidth: 1 Gpbs), 200 virtual machines (CPU computing array: (200,400,600,800), computer frequency: (0.2GHz, 0.4GHz, 0.6GHz, 0.8GHz); internal storage: 1GB; storage: 400 GB; bandwidth: 250 Mbps), 150 ~ 200 W power consumption, and concurrent execution of 200 tasks. The four algorithms were simulated under the above conditions. The service level agreement (SLA) violation rate, resource balance and placement superiority of the four algorithms were analyzed. It was found that first fit algorithm was moderate in service quality and energy consumption, but the randomness was high; least residue algorithm was excellent in service quality, but the energy consumption was high; the conventional ant colony algorithm and the improved ant colony algorithm had excellent service quality and low energy consumption. The analysis of the placement superiority of the four algorithms suggested that multi-objective ant colony optimization algorithm had good balance in service quality and energy consumption. In conclusion, the proposed multi-objective ant colony optimization algorithm can reduce energy consumption on the premise of ensuring service quality.

Title of the Paper: Automated Control System Design with Model-based Commissioning


Authors: Jiri Koziorek, Antonin Gavlas, Jaromir Konecny, Martin Mikolajek, Radim Kraut, Petr Walder

Pages: 6-12

Abstract: A process of industrial control system design contains a set of steps. The result of the design process is significantly influenced by quality of execution of each step. An important phase of the design is a testing on different level of the design. The testing process influences a commissioning of the control system which follows the design process. The article describes innovative approach of automated control system design and analyses the possibilities of model based testing and commissioning. Both, the automated control system design and model based commissioning increase efficiency and quality of engineering process and of the designed control system. The model based commission is very close to digital twin approach which is one of important trends in automation.

Title of the Paper: An Improved Algorithm for the Optimization and Adjustment of Urban Rail Transport Operation Order


Authors: G. M. Ma, J. W. Yan

Pages: 1-5

Abstract: Urban rail transport is an important traffic means; hence the adjustment of urban rail transport operation order is a quite important part. The network density is restrained due to the large construction cost of rail transport. Moreover the disturbance of random factors leads to the actual operation deviation of rail transport. To optimize the operation order of rail transport, this study optimized and adjusted the delay problem of 12 stations (from Liuyuan station to Anshan road station) along subway line 1 in Tianjin, with the improved genetic algorithm and investigated the feeder bus routes based on the balance of passenger flow volume. The research results demonstrated that the average value of population genetics and the variation of objective function became smaller with the increase of iterations and tended to be stable after 15 times of iterations; the corresponding delay gradually relieved as the train passed more and more stations and disappeared after passing the 12th station; the convergence of the improved genetic algorithm used in the optimization of feeder bus network tended to be stable with the increase of iteration number. 4364.74 s was consumed to obtain the optimal solution, and the proportion of penalty cost was acceptable. Hence it is concluded that the improved genetic algorithm can help optimize the order of urban rail transport.