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International Conference on Power electronics and Drive systems (PEDS)

作者： Wanchak Lenwari Milijana Odavic Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand Department of Electrical and Electronic Engineering University of Nottingham Nottingham UK

In recent years, the increase of non-linear loads in electrical power system has sparked the research in power quality issue. The shunt active power filter (SAPF) is a power electronic device which has been developed to improve power quality. The current control of shunt power filters is critical since poor control can reinforce existing harmonic problems. Various control strategies have been proposed by many researchers. In this paper, a comparative evaluation of the performance of two current control techniques, resonant and predictive controller, is presented with identical system specification. The design procedure and principle of both current control methods are also presented in detail. Simulation results show the comparison of transient response, steady state control and performance in the presence of variation of supply impedance between two control techniques.

关键词： Current control Active filters Electric current control Power system harmonics Power harmonic filters Power quality Power electronics Power filters Resonance control systems

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An emulation of autonomous parallel parking system using fuzzy logic control

An emulation of autonomous parallel parking system using fuz...

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SICE Annual Conference

作者： Benjamas Panomruttanarug Sarayut Tungporntawee Parnupong Thongsuk Kohji Higuchi Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand Department of Electronic Engineering University of Electro-Communications Tokyo Japan

This paper represents an emulation of fuzzy logic control schemes in autonomous parallel parking system in a backward maneuver. There are four infrared sensors sending distance data to microcontroller for generating an obstacle-free parking path. Two of them mounted on the front and rare wheels on the parking side are used as the inputs to the fuzzy rules to calculate a proper steering angle while backing. The other two attached to the front and rear ends serve for avoiding collision with other cars along the parking space. At the end of parking process, the vehicle will be in line with other parked cars and position in the middle of the free space. A construction of fuzzy rules is designed based upon a wall following process. The effectiveness of the controller design is demonstrated in the experimental results.

关键词： Emulation Fuzzy logic control systems Space vehicles Infrared sensors Wheels Path planning Microcontrollers Technological innovation Safety

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Prototype multimedia database system for registration of emergency situations

Prototype multimedia database system for registration of eme...

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Signal Processing Algorithms, Architectures, Arrangements and Applications (SPA)

作者： Julian Balcerek Szymon Drgas Adam Dąbrowski Adam Konieczka Department of Computing Science and Management Chair of Control and System Engineering Division of Signal Processing and Electronic Systems Poznan University of Technology Poznan Poland

In this paper a prototype emergency services system is presented, equipped with a multimedia database registering and storing relevant emergency situations in a semi automatic way. In this paper we assume that this database is created exclusively with sound and linguistic material won from emergency telephone calls. The presented system enables conducting speaker recognition experiments. Sources of data, metadata generation, architecture description, searching for results, and database implementation are comprised.

关键词： Manuals World Wide Web Phase locked loops Web pages Graphical user interfaces Encyclopedias

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Nonlinear Observer Design for Discrete MIMO systems with Unknown Time Delay

Nonlinear Observer Design for Discrete MIMO Systems with Unk...

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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Jing Na Guido Herrmann Xuemei Ren Phil Barber Education Ministry Key Laboratory of Complex System Intelligent Control and Decision School of Automation Beijing Institute of Technology IEEE Department of Mechanical Engineering University of Bristol

This paper proposes an adaptive observer for discrete MIMO systems with unknown dynamics and *** case that the system output equation has time-delay and nonlinearities is also *** delayed states in the system are with a nonlinear form and only the estimated delay is *** using a high-order neural network(HONN),the precise system model,and the Lipschitz or norm-boundedness assumption of unknown nonlinearities are not required.A novel converse Lyapunov Lemma is also developed to prove the uniform ultimate boundedness(UUB) of the proposed *** of the presented scheme is verified by simulation.

关键词： Lyapunov Nonlinear Observer Design for Discrete MIMO systems with Unknown Time Delay Observer

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Trapped magnetic field measurements on HTS bulk by peak controlled pulsed field magnetization

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Journal of Physics: Conference Series 2010年第3期234卷

作者： Tetsuya Ida Masahiro Watasaki Yosuke Kimura Motohiro Miki Mitsuru Izumi Department of Electronic Control Engineering Hiroshima National College of Maritime Technology 4272-1 Higashino Ohsakikamijima-cho Toyota-gun Hiroshima 725-0231 Japan Kawasaki Heavy Industries Ltd. Technical Institute System Technology Development Centre 1-1 Kawasaki-cho Akashi-shi Hyogo 673-8666 Japan Department of Marine Electronics and Mechanical Engineering Tokyo University of Marine Science and Technology 2-1-6 Etchu-jima Koto-ku Tokyo 135-8533 Japan

For the past several years, we have studied the high-temperature superconducting (HTS) synchronous motor assembled with melt-textured Gd-Ba-Cu-O bulk magnets. If the single pulse field magnetizes a bulk effectively, size of electrical motor will become small for the strong magnetic field of the HTS magnets without reducing output power of motor. In the previous study, we showed that the HTS bulk was magnetized to excellent cone-shape magnetic field distribution by using the waveform control pulse magnetization (WCPM) method. The WCPM technique made possible the active control of the waveform on which magnetic flux motion depended. We generated the pulse waveform with controlled risetime for HTS bulk magnetization to suppress the magnetic flux motion which decreases magnetization efficiency. The pulsed maximum magnetic flux density with slow risetime is not beyond the maximum magnetic flux density which is trapped by the static field magnetization. But, as for applying the pulse which has fast risetime, the magnetic flux which exceed greatly the threshold penetrates the bulk and causes the disorder of the trapped magnetic distribution. This fact suggests the possibility that the threshold at pulsed magnetization influences the dynamic magnetic flux motion. In this study, Gd-Ba-Cu-O bulk is magnetized by the controlled arbitrary trapezoidal shape pulse, of which the maximum magnetic flux density is controlled not to exceed the threshold. We will present the trapped magnetic characteristics and the technique to generate the controlled pulsed field.

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Routing Protocol for Wireless Sensor Networks in Home automation

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IFAC Proceedings Volumes 2009年第3期42卷 27-33页

作者： Xiao Hui Li Hong Qin Xu Seung Ho Hong Zhi Wang Xiang Fan Piao Engineering Research Center of Metallurgical Automation and Measurement Technology Ministry of Education Wuhan University of Science and Technology Wuhan Hubei 430081 China State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310027 China Department of Electronics Information and System Engineering Hanyang University 425-791 Korea Department of Electronic Information Engineering College of Science and Engineering Yanbian University Yanji 133002 China

Home automation systems based on wireless sensor/actuator networks are characterized by diversity of node power sources, limited computational power, and mobility. We propose a routing protocol that fully uses the location of static nodes to limit the search for a route to a small zone based on the analysis of characteristics and requirements. The calculation of two different kinds of zone and the route discovery procedure are described in this paper. According to the environment of home automation, we compared the performance of our routing protocols with the ad-hoc on-demand distance-vector protocol using simulation and gave suggestions for zone selection. Simulation results showed that our routing protocol dramatically reduced the routing overhead and increased the reliability.

关键词： Wireless Sensor/Actuator Networks Home automation Routing Protocol

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Automatic adaptive onset detection using an electromyogram with individual difference for control of a meal assistance robot

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Journal of Medical engineering and Technology 2009年第4期33卷 322-327页

作者： Zhang, X. Wang, X. Wang, B. Sugi, T. Nakamura, M. Department of Automation East China University of Science and Technology Shanghai 200237 China Department of Electrical and Electronic Engineering Saga University Saga 840-8502 Japan Department of Advanced Systems Control Engineering Saga University Saga 840-8502 Japan

The onset detection of muscle activation is an essential issue in electromyogram (EMG) control. In this paper, a novel approach based on EMG power with automatic adaptive threshold is proposed to address this issue. The purpose is to develop an effective EMG-controlled meal assistance robot. Taking into account the individual difference such as contraction power and resting power, the threshold of onset detection is set with respect to the latest EMG signal. The results show the method is able to adjust automatically to avoid false alarms, and works well when the contraction power varies. Implementation of this EMG-controlled meal assistance robot may provide limb-deficient patients with an effective and comfortable human-machine assistance interface.

关键词： Adaptive control systems

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Yaw control via combined braking and steering

Yaw control via combined braking and steering

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European control Conference (ECC)

作者： B. Vanek B. Kulcsár P. Falcone G. Balas Computer and Automation Research Institute of the Hungarian Academy of Sciences Delft Center for System and Control Department of Signals and Systems Chalmers University of Technology Department of Aerospace Engineering and Mechanics University of Minnesota

Active yaw stabilization for passenger vehicles, following driver yaw rate commands with steer-by-wire and rear break force distribution, is discussed. The problem is solved via a decomposition of the vehicle equations of motion into a static, scheduled tyre characteristics map, and an affine Linear Parameter Varying (LPV) plant. control is provided via a cascade connection of scheduled inverse tyre characteristics and an LPV controller, handling both the nonlinear dynamics an the non-affine tyre characteristics. Excellent tracking results are demonstrated with a high fidelity simulation even in the presence of noise and uncertainty.

关键词： Tires Force Mathematical model Wheels Vehicles Equations Nonlinear dynamical systems

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Application of Robust control Theory to Main Steam Temperature of Circulating Fluidized Bed Boiler

Application of Robust Control Theory to Main Steam Temperatu...

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IEEE PES Asia-Pacific Power and Energy engineering Conference (APPEEC)

作者： Yi Luo Zhongshi Yue Shuangxin Wang Department of automation North China Electric Power University Beijing China School of Mechanical& Electronic Control Engineering Beijing Jiaotong University Beijing China

Main steam temperature of circulating fluidized bed boiler possesses the features such as large inertia, large lag and non-linear, so it can be equivalent to a one-step inertia object with time delay which has measurable disturbance in a specific condition. This paper is based on FOPDT model, design a new kind of non-fully differential PID controller with H infin control technology, then makes the widely used PID controller more robust, while avoiding the problem of controller directly designed with control theory is hard to be realized for higher-step.

关键词： Robust control Fluidization Boilers Delay effects Temperature control Transfer functions Three-term control Temperature distribution Automatic control Turbines

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Sensorless vector control of non-salient BLAC machines based on a modified rotor flux-linkage observer

Sensorless vector control of non-salient BLAC machines based...

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International Conference on Power electronics and Drive systems (PEDS)

作者： Pongpit Wipasuramonton Z. Q. Zhu David Howe Industrial Control and Automation Laboratory National Electronics and Computer Technology Center Pathum Thani Thailand Department of Electronic and Electrical Engineering University of Sheffield Sheffield UK

The major problems of flux-linkage observer based sensorless techniques are drift and offset effects. To solve such problems, a modified rotor flux-linkage observer is firstly proposed to eliminate the drift phenomena. However, the offset occurrence still exists. Therefore, an adaptive offset cancellation technique is sequentially introduced to solve the offset phenomena. In addition, to further improve the performance of the proposed modified rotor flux-linkage observer, the influence of inaccurate machine parameters to the observer in terms of the estimated rotor position accuracy has been analyzed and, consequently, a simple steady-state rotor position error compensation technique has been introduced which, theoretically, makes the steady-state rotor position error become negligible and parameter insensitive. The performance of the proposed techniques, which was implemented on a low-cost fixed point DSP, is demonstrated experimentally.

关键词： Machine vector control Stators Steady-state Digital signal processing Voltage automation Error compensation Equations Sensorless control Costs

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