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2012 IEEE International Conference on control system, Computing and engineering, ICCSCE 2012

作者： Gaya, Muhammad Sani Wahab, Norhaliza Abdul Sam, Yahya Md Razali, Mashitah Che Samsudin, S.I. Department of Control and Instrumentation Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia Department of Industrial Electronics Universiti Teknikal Malaysia Melaka Hang Tuah Jaya 76100 Durian Tunggal Melaka Malaysia

ISBN: (纸本)9781467331432

Wastewater treatment system is highly uncertain and intricate system. Suitable model is a key to smooth and optimal operation of the system. The available wastewater treatment system models are too difficult to use and costly to experiment. This paper presents neuro-fuzzy modelling of wastewater treatment system. Adaptability, smoothness, effectiveness, reliability, less computational and empirical experimentation costs are some of the advantages of neuro-fuzzy approach. Simulation studies show that the proposed neuro-fuzzy technique yielded outstanding results. Thus, proven the technique is an efficient and valuable tool for modelling wastewater treatment system. © 2012 IEEE.

关键词： Wastewater treatment

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Sensitivity characteristics of electrostatic sensor using finite element modeling

Sensitivity characteristics of electrostatic sensor using fi...

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IEEE International Conference on control system, Computing and engineering (ICCSCE)

作者： Teimour Tajdari Mohd Fua'ad bin Rahmat Iliya Tizhe Thuku Department of Control and Instrumentation Engineering Faculty of Electrical Engineering UTM Skudai Johor Malaysia

Electrostatic sensor detects the electric charge carried by dry particle in a pneumatic conveyor. Sensitivity characteristics of the Electrostatic sensor play an important role to design a flow measurement system. In this study, the sensitivity features of the ring shape electrodes are simulated to find the effect of electrode geometry on sensor sensitivity. Ansys Maxwell 14.0 is utilized as an electric field simulator to measure the amount of induced electrical charge from a particle to the sensor electrode in a 3D environment using finite-element analysis. The results precisely show the sensitivity characteristics between electrodes with different thickness, axial length and diameter.

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Optimizing the frequency of Ultrasonic Tomography system with a metal pipeline

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Sensors and Transducers 2012年第5期140卷 53-64页

作者： Abbaszadeh, Javad Abdul Rahim, Herlina Abdul Rahim, Ruzairi Department of Control and Instrumentation Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia

Ultrasonic Tomography has an important role in industry to produce scanned images for various propose. In this paper, producing the cross sectional images of pipe for detecting percentage of attendance of solid, liquid and gas inside the metal pipe has been investigated. The correct method of mounting of Ultrasonic sensors and behavior of the ultrasonic wave propagation in different layers has been simulated by the use of finite element software (COMSOL Multiphysics 3.5). To increase in practical nondestructive evaluation and inspection, we should increase our understanding of the basic physics and wave mechanics associated with guided wave inspection. Finding the proper ultrasonic sensor base on its efficiency is the main step of designing an Ultrasonic Tomography system. This is done by estimating the resonance frequency of sensor due to manner of ultrasonic wave propagation in different frequencies shown in simulation results. Optimum frequency of the system is proposed 45 kHz. © 2012 IFSA.

关键词： Ultrasonic waves

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The Application of Simple Adaptive control for Simulated Water Hydraulic Servo Motor system

The Application of Simple Adaptive Control for Simulated Wat...

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IEEE International Conference on Industrial Technology

作者： Pha N. Pham Kazuhisa Ito Shigeru Ikeo Shibaura Institute of Technology College of System Engineering and Science Department of Machinery and Control Systems 307 Fukasaku Saitama city 337-8507 Japan Sophia University Faculty of Science and Technology Department of Engineering and Applied Sciences Kioicho 7-1 Chiyoda Tokyo 102-8554 Japan

ISBN: (纸本)9781467345675

Because of the serious situation of environmental pollution all over the world, the water hydraulic technique using pure tap water as a pressure medium has become new drive source comparable to electric, oil hydraulic, and pneumatic drive systems. Furthermore, water hydraulics is also preferred because of its high power density, clean, high safety against fire hazards, and easy availability. However, the main problems for precise control in water hydraulic systems are steady state errors and overshoot due to its large friction torque and considerable leakage flow. In this study, a simple adaptive control (SAC) algorithm that is appropriate for dealing with these problems will be applied to a water hydraulic servo motor system for both angle and velocity controls. SAC also has simple, lower order structure, and few adaptive parameters;thus, it is high feasibility in real applications. For both angle and velocity controls using SAC, the tracking performances are good in simulation: 0.08 degree and almost 0 revolution per minute (min~(-1)) for angle and velocity controls, respectively. The controllers also can highly attenuate the effects of disturbances.

关键词： Servomotors Valves Friction Adaptive control Velocity control Transfer functions Water pollution

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Improved Speed control using Anti-Windup PI controller for Direct Torque control based on Permanent Magnet Synchronous Motor

Improved Speed Control using Anti-Windup PI Controller for D...

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International Conference on control, Automation and systems

作者： Kraisorn Klinlaor Nontawat Chuladaycha Department of Instrumentation and Control Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang

ISBN: (纸本)9781467322478

This paper present a PI with Anti-Windup (PI+AW) strategy to regulate a rotor speed of permanent magnet synchronous motor (PMSM). The strategy and PMSM modeling are based on Direct Torque control (DTC) with a Space Vector Modulation (SVM). A Matlab/Simulink is used to establish the simulation model. As the result of simulation, Overshoot of a starting torque and a setting time of rotor speed are reduced. Consequently, the PI+AW are significantly greater than conventional PI.

关键词： Permanent Magnet Synchronous Motor Direct Torque control Flux linkage estimator Anti-Windup

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Balance Weight Fault Detection In Compressor Using FFT Algorithm

Balance Weight Fault Detection In Compressor Using FFT Algor...

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International Conference on control, Automation and systems

作者： Vittaya Thipsuwanporn Arjin Numsamran Mongkol Leawsoong Department of Instrumentation and Control Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang

ISBN: (纸本)9781467322478

This paper is investigating stator current to detected balance weight faults and frequency component base on observations in the amplitude of sideband component between healthy and faulty compare with absolute statics and dynamics center of gravity. This paper apply Motor Current Signature Analysis (MCSA) method using Fast Fourier Transform (FFT) algorithm. And show prime features of difference signal between healthy and faulty compressor. Finally also present the relations between center of gravity and fault amplitude sideband frequency components.

关键词： BLDC MCSA FFT CM BW

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Stabilisation of low voltage distribution networks with renewable energy sources

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IFAC Proceedings Volumes 2013年第28期46卷 455-460页

作者： Z. Bradáč F. Zezulka P. Marcon Z. Szabó Karel Stibor CEITEC Brno University of Technology Technická 12 616 00 Brno Czech Republic (Tel: ++420 541 146 376 CVVOZE Brno University of Technology Technická 12 616 00 Brno Czech Republic (Tel: ++420 541 146 440 ) (Tel: ++420 541 146 275 (Tel: ++420 541 146 275 +420 736 488 513) Brno University of Technology Department of Control and Instrumentation Faculty of Electrical Engineering and Communication Technicka 3082/12 Brno 616 00 Czech Republic

Recent development in the area of renewable energy sources (RES) shows, that situation in countries supporting a great growth of RES, particularly photovoltaic, leads to big problems. Modelling studies show that in a very near future there will be a big surplus of electrical energy production in networks of NN (low voltage networks). It would evoke necessity to transfer energy into higher voltage networks. However it will not be possible while protection systems of high voltage networks are developed for the opposite flow of energy. Contribution deals with possible solution of stability of NN distribution networks by means of smart metering – smart grid system. Proposal of electronic instrumentation of measurement and control is presented in the contribution.

关键词： smart metering distribution network transition lines stability renewable energy sources

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Reliability analysis of the human operator

Reliability analysis of the human operator

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International Carpathian control Conference (ICCC)

作者： Marie Havlikova Sona Sediva Department of Control and Instrumentation Faculty of Electrical Engineering and Communication BUT Brno Czech Republic

The article discusses the reliability of the human operator in the Man - Machine - system (MMS). Safety and reliability of technical systems can be critically influenced by people's behavior. It is necessary to analyze the technical components of the system and at the same analyzing human activities. Creating a probabilistic risk assessment (PSA) is based on a comprehensive evaluation of human behavior. Probabilistic estimate of a human reliability assessment (HRA) aims at the quantitatively analyze human action to identify possible errors, identifying weaknesses in the system. In the second part of the article there is an analysis of dynamic changes in driver behavior due to rising fatigue. The fatigue and a decrease in concentration are reflected especially on long monotonous rides on highway, where cars reach high speeds. The failure of the driver in this situation is critical.

关键词： Humans Vehicles Reliability Fatigue Monitoring Trajectory Error analysis

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Security of remote management of embedded systems running MikroTik RouterOS operating system using proprietary protocols

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IFAC Proceedings Volumes 2012年第7期45卷 169-173页

作者： T. Jílek L. Žalud Brno University of Technology Faculty of Electrical Engineering and Communication Department of Control and Instrumentation Brno Czech Republic

This paper deals with proprietary communication protocols that are implemented in the MikroTik RouterOS operating system. These communication protocols are specially designed for remote management of embedded systems that run with this operating system. These protocols are closed and thus they have not a publicly accessible documentation. In this paper the principles of their functions that are identified on the basis of realized communication analyses are described. Security risks that are associated with the use of these communication protocols are also analyzed in the paper. Attack that uses conceptual bug in the design one of these communication protocols is demonstrated on a real example. Full and unlimited access to embedded system that runs with this operating system can be obtained with this attack.

关键词： security analysis communication protocols communication networks remote management operating systems embedded systems

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A Single Phase 9-Level Inverter controlling Based On Phase Lock Loop Technique

A Single Phase 9-Level Inverter Controlling Based On Phase L...

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International Conference on control, Automation and systems

作者： V. Tipsuwanporn A. Charean A. Numsomran K. Phipek Department of Instrumentation and Control Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Department of Electrical Engineering Faculty of Engineering Kasem Bundit University

ISBN: (纸本)9781467322478

In this paper is presented the multilevel inverter which is controlled by Phase Lock Loop (PLL) controller in close-loop system. The multilevel inverter was multiplied voltage levels at output. The inner PLL controller was controlled by PI control in order to firing angle of PWM signal. This control scheme is estimated phase and frequency in DQ-transform of PLL controller on time domain. The PLL controllers were locking constant the frequency and voltage of inverter through the signal estimated in DQ-dimension. The proposed methods determine high-precision and accuracy of switching frequency in PLL characteristic based on time domain. Moreover, in this paper represented the 2nd order phase lock loop (PLL) analysis methodology. The 2nd order phase lock loop demonstrated in transfer function form that is measured and analysis the signal in time domain. The close-loop control was analyzed the fast response and stability in frequency domain which is obviously behavior of Phase Lock Loop (PLL).

关键词： 9-level diode clamp inverter PLL Modulation strategy Time and Frequency domain

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