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International Conference on ITS Telecommunications (ITST)

作者： S. Promnoi P. Tangamchit W. Pattara-Atikom Department of Control System and Instrumentation Engineering King Mongkut''s University of Technology Thonburi Thailand National Electronics and Computer Technology Center Pathum Thani Thailand

This research studies the proof of concept to road traffic estimation based on the position and velocity of cellular phones. The positioning technique, received signal strength method, was applied to obtain road traffic data. The two algorithms: Linear interpolation of position from signal strength and centroid of signal strength were implemented to identify the positions and velocity of a mobile phone in cars. Successfully estimated results, position and speed, showed that both of two methods have the potential to estimate traffic congestion while the first method is more efficient than another. According to the first method, it yielded an average error of 190.8 m, while the velocity estimation yielded an average error of 10.38 km/hr. The errors from another are 195.29 m and 10.39 km/hr respectively.

关键词： Cellular phones Mobile handsets Roads Base stations Neurons Interpolation Signal processing Broadcasting Velocity control control systems

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Outdoor vehicle and shadow segmentation by temporal edge density information of adjacent frames

Outdoor vehicle and shadow segmentation by temporal edge den...

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International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： Chanchai Techawatcharapaikul Pakorn Kaewtrakulpong Supakorn Siddhichai Department of Computer Engineering Thailand Department of Instrumentation and Control System Engineering Facaulty of Engineering King Mongkut's University of Technology Bangkok Thailand National Electronics and Computer Technology Center NECTEC Pathum Thani Thailand

The problem of vehicle detection and segmentation in outdoor scenes is tackled. Vehicle shadows pose problems in vehicle segmentation step. In this paper, it is proposed to employ temporal edge density information as prior knowledge to distinguish moving vehicle from moving shadow and background in a traffic surveillance system. Experimental results showed good moving vehicle segmentation performance. The proposed approach is currently limited to free-flowing traffic scenes.

关键词： Image edge detection Vehicles Image color analysis Image segmentation Pixel Accuracy Computer integrated manufacturing

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Enslavement and control in dq synchronous frame for using a cascade multilevel NPC structure

Enslavement and control in dq synchronous frame for using a ...

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International Design and Test Workshop

作者： F. Bouchafaa S. Arezki M. Boudour E.M. Berkouk Laboratory of Instrumentation and Engineering System University of Sciences and Technology Houari Boumediene Algiers Algeria Laboratory of Process Control Department Electrical engineering National Polytechnic School of Algiers Algiers Algeria

The aim of this paper is to give a solution to unbalance problem of the input DC voltages of the nine-level NPC-VSI in dq synchronous frame. For that, we used in high voltage and great power applications, one two-level PWM current rectifier-nine-level NPC VSI cascade. In the first part, we develop a knowledge model of the nine-level NPC VSI and propose a space vector modulation of this converter using eight bipolar carriers. After that, this study shows particularly the problem of the stability of the DC voltages of the inverter. Then, we propose a solution to the problem by employed closed loop regulation using classic PI regulator mode in d-q synchronous frame. We add a clamping bridge to stabilise the multi DC input voltages of the nine-level NPC VSI. This cascade found applications in great power and high voltage fields as electrical traction.

关键词： Voltage Pulse width modulation inverters Pulse width modulation Clamps Stability Bridge circuits Regulators Power semiconductor switches Instruments systems engineering and theory

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Designing iterative learning control subject to actuator limitations using QP methods

Designing iterative learning control subject to actuator lim...

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作者： Longman, Richard W. Mombaur, Katja D. Panomruttanarug, Benjamas Columbia University New York NY 10027 United States LAAS-CNRS Toulouse 31077 France King Mongkut's University of Technology Thonburi Bangkok 10140 Thailand Department of Mechanical Engineering 500 West 120th St. New York NY 10027 United States 7 Avenue du Colonel Roche Department of Control System and Instrumentation Engineering United States

ISBN: (纸本)9781563479458

Iterative learning control (ILC) applies to situations when a system performs a tracking maneuver repeatedly. The error each run is used to adjust the command in the next run, aiming to converge to zero error. Spacecraft applications include making fine pointing equipment follow a precise scan pattern in spite of flexibility effects. Effective ILC design methods are available for linear systems. An important issue is that ILC may reach act uator saturation limits during the iterations with hardware, and then there is no guarantee of convergence. This paper develops ILC methods based on quadratic programming that guarantee convergence under such conditions starting from a feasible trajectory. Copyright © 2008 by the American Institute of Aeronautics Inc.

关键词： Quadratic programming

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A particle swarm optimization approach for optimal design of PID controller for position control using Shape Memory Alloys

A particle swarm optimization approach for optimal design of...

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International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： Rujisak Muangsong Diew Koolpiruck Anak Khantachawana Panadda Niranatlumpong Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Bangkok Thailand Department of Mechanical Engineering King Mongkut's University of Technology Bangkok Thailand Klong Luang Pathum Thani Thailand

This paper presents the optimal design of PID controller based on a particle swarm optimization (PSO) approach for position control using spring shape memory alloys (SMA) actuator. The mathematical model of experimental system had been approximate near the operating point for the PSO algorithm to adjust PID parameters for the minimum integrated absolute error (IAE) condition. The results show the adjustment of PID parameters converting into the optimal point and the good control response base on the optimal values by the PSO technique.

关键词： Particle swarm optimization Springs Temperature Shape Actuators Position control Shape memory alloys

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Detection of hazardous driving behavior using fuzzy logic

Detection of hazardous driving behavior using fuzzy logic

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International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： T. Imkamon P. Saensom P. Tangamchit P. Pongpaibool Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thailand Network Technology Laboratory National Electronics and Computer Technology Center Klong Luang Pathum Thani Thailand

We propose a system that can record driving events and detect unsafe driving behaviors. Three sensors, an engine control unit (ECU) reader, a 3-axis accelerometer, and a camera are used, in which they represent the car, the passenger, and the driverpsilas perspective. Our system combines data from these three sensors with a fuzzy inference system to identify an event of hazardous driving. The output of the system is the driving risk level ranging from 1 to 3, where 1 is the safest. The output of the system was verified by comparison with a questionnaire from three passengers in a test run experiment.

关键词： Cameras Accelerometers Acceleration Vehicles Driver circuits Roads Sensors

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Experimental Verification of Floating-Output Interleaved-Input DC-DC High-Gain Transformer-less Converter Topologies

Experimental Verification of Floating-Output Interleaved-Inp...

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39th IEEE Power Electronics Specialists Conference (PESC 2008), vol.2

作者： Damien Coutellier Vassilios G. Agelidis Sewan Choi Department of Electrical and Control System Engineering University of Belfort Montbeliard France School of Electrical and Information Engineering University of Sydney NSW Australia Department of Control and Instrumentation Engineering Seoul National University of Technology South Korea

In transformer-less fuel-cell energy conversion systems the voltage-gain is required to be as high as possible. Although component parasitic elements limit the practically realizable voltage-gain of any converter topology, this becomes a critical issue in the case of the basic step-up converter. In this paper, a comparative evaluation of two high-voltage-gain interleaved step-up derived converter topologies suitable for fuel-cell applications is documented. Both converter topologies offer lower input-current/output-voltage ripple and lower voltage/current ratings of the various circuit elements when compared to the basic step-up topology. Analysis and simulation results are provided and experimental results taken from low power laboratory prototypes are presented.

关键词： Converters Topology Gain Transistors Capacitance Inductance Capacitors

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Fingerprint compression using contourlet transform and self organizing feature map

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Iranian Journal of Electrical and Computer engineering 2007年第2期6卷 133-140页

作者： Veerakumar, T. Esakkirajan, S. Sudhakar, R. Murugan, V. Senthil Department of Electronics and Communication Engineering PSG College of Technology Coimbatore-641004 India Department of Instrumentation and Control System Engineering PSG College of Technology Coimbatore-641 004 India Automotive Sector Mahindra and Mahindra Nasik India

This paper presents a new coding technique for fingerprint compression, which is based on contourlet transform and Self-Organizing Feature Map (SOFM) vector quantization. One of the main difficulties in developing compression algorithms for fingerprints resides in the need for preserving the minutiae, which are subsequently used in identification. Wavelets have shown their ability in representing natural images that contain smooth areas separated with edges. However, wavelets cannot efficiently represent the ridge and furrow patterns, which are predominant in fingerprints. This issue is addressed by directional transforms, known as contourlets, which have the property of preserving edges. SOFM based vector quantizer quantizes the coefficients obtained by contourlet transform. The results obtained are tabulated and compared with those of the wavelet based ones. © 2007 JD.

关键词： Self organizing maps

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Fitting a Pineapple Model for Automatic Maturity Grading

Fitting a Pineapple Model for Automatic Maturity Grading

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IEEE International Conference on Image Processing

作者： Watcharin Kaewapichai Pakorn Kaewtrakulpong Asa Prateepasen Kittiya Khongkraphan Instrumentation and Control System Engineering Department Faculty of Engineering King Mongkut''s University of Technology Bangkok Thailand Production Engineering Department Faculty of Engineering King Mongkut''s University of Technology Bangkok Thailand

In this paper, we present a pineapple skin model and a method to fit the model. Our main application of the model is for automatic maturity grading of pineapples in canned pineapple industry. The model consists of two subparts: Phyllotaxis and pineapple scale models. The Phyllotaxis model represents the spiral arrangement of pineapple-scales, which is a growing pattern of the fruit. It includes a string of scale-model cells. The scale model includes boundary, internal area and petal part of scale. Modified snake algorithm is used to construct the structure model while Active Shape Model (ASM) is applied to each scale. The model can accurately fit to pineapple skins in our experiment and classification features of the fruit can be extracted.

关键词： Spirals Skin Active shape model Fitting Instruments control system synthesis Automatic control systems engineering and theory Production engineering Raw materials

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Coordinated control of the brake control system and the driveline control system

Coordinated control of the brake control system and the driv...

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International Conference on control, Automation and systems ( ICCAS)

作者： Jeong-Yeop Hwang Hyeongcheol Lee Ji-Hwan Kim Jeong-Hun Kim Byung-Hak Kwak Department of Electric Engineering Hanyang university Seoul South Korea Division of Electrical Control and Instrumentation Biomedical Engineering Hanyang university Seoul South Korea ABS Research & Development Brake Control Team Global Brake System H.Q. MANDO Corporation Gyeonggi South Korea

The behavior of a vehicle is strongly influenced by the distribution of driving and braking torques in four wheels. Therefore, traction and stability characteristics of a vehicle can be controlled by the controlling driveline and the braking torques. However, independent and uncoordinated control of the brake and driveline control system can harm the vehicle performance due to the interference between two devices. So, the vehicle equipped with both the brake control system and the driveline control system requires a coordinated control of both systems to reduce the bad interference and to maximize vehicle performance. This paper presents the procedure of the coordinated control design of the brake and driveline control systems. The 2 degree of freedom (DOF) vehicle model and the driveline model including torque biasing devices are developed. Each control algorithm for the ESP and the coupling (the target torque biasing device) are developed based on the models. Finally, the coordinated control is designed to maximize the yaw stability of the vehicle. The developed models and the control algorithms are programmed using Matlab/Simulink and verified by co-simulation with a commercial vehicle simulation tool, CarSim.

关键词： control systems Vehicle driving Mathematical model Torque control Stability Interference Vehicles Wheels control design Electrostatic precipitators

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