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2005 American control Conference, ACC

作者： Hsieh, Chung H. Jin, Zhipu Marthaler, Daniel Nguyen, Bao Q. Tung, David J. Bertozzi, Andrea L. Murray, Richard M. Dept. of Electrical Engineering University of California Los Angeles Los Angeles CA 90095 Dept. of Electrical Engineering California Institute of Technology Pasadena CA 91125 Dept. of Mathematics University of California Los Angeles Los Angeles CA 90095 Dept. of Computer Science University of California Los Angeles Los Angeles CA 90095 Control and Dynamical Systems California Institute of Technology Pasadena CA 91125

This paper demonstrates the testbed implementation of a simple algorithm for cooperatively locating and following environmental boundary in two-dimensional space. The algorithm alternates between clockwise and counter-clockwise motion along circular paths. By switching the orientation of rotation upon crossing the boundary, a vehicle is able to continue along its search. Coordination is achieved by changing vehicle speeds depending on the location of other vehicles. © 2005 AACC.

关键词： Algorithms

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Modelling of needle insertion forces for surgical simulation

Modelling of needle insertion forces for surgical simulation

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IEEE International Conference on Mechatronics and Automation, ICMA 2005

作者： Yang, Hua Liu, Peter X. Zhang, Jiadong Dept. of Systems and Computer Engineering Carleton University Ottawa Ont. K1S 5B6 Canada School of Mechanical Electronic and Control Engineering Beijing Jiaotong University Beijing 100044 China

ISBN: (纸本)0780390458

A novel force model for needle insertion into soft tissues has been developed for virtual reality and haptics based simulation of percutaneous therapies. The forces are divided into two parts, stiffness force and friction force, for which a blood vessel model is used in order to improve the realism. The validity of the developed model is confirmed by a comparison between the results from the developed model and those derived from real data. © 2005 IEEE.

关键词： computer simulation

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Non-contact prediction of soil moisture profiles using radio wave reflection

Non-contact prediction of soil moisture profiles using radio...

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2005 ASAE Annual International Meeting

作者： Needham, Duane L. Weckler, Paul R. Bunting, Charles F. Stone, Marvin L. Control System Design Consultant 310 N. Civic Drive # 405 Walnut Creek CA 94596 United States Biosystems and Ag Engineering Dept. Oklahoma State University Stillwater OK 74078 United States Electrical and Computer Engineering Dept. Oklahoma State University Stillwater OK 74078 United States

This work investigated the potential for the non-contact measurement of volumetric soil moisture profiles by detecting reflected VHF and UHF radio waves. The investigation included the development of an instrumentation system to measure radio wave reflection coefficients, a calibration routine for such a system, a model for simulating electromagnetic reflections from layered dielectric media, and an algorithm devised to resolve layers of moisture from radio wave reflections of multiple frequencies. Field trials of the system were conducted in which measured reflection coefficients were compared with simulated results, and predicted moisture gradients were compared with actual moisture profiles. The model that simulated reflection coefficients in the frequency range of 80 MHz to 1 GHz was tested using hypothetical and existent moisture profiles. Results of simulated profiles indicated that reflection coefficients could be used to distinguish between volumetric surface moisture and could detect subsurface moisture to a dept. of 45.7 cm. Reflection measurements made in the field trials indicated that linear correlation could be made with volumetric moisture in the top 15.2 cm. The profile restoration algorithm closely predicted simulated near-surface moisture but had a high failure rate predicting deep subsurface moisture. Results of the study indicated that reflection coefficients could be used to detect soil moisture at dept., but the restoration algorithm did not effectively resolve moisture layers.

关键词： Soil moisture

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Approximated optimal control of singularly perturbed systems via Haar wavelets

Approximated optimal control of singularly perturbed systems...

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作者： Karimi, H.R. Jabedar, Maralani P. Moshiri, B. Lohmann, B. Dept. of Electrical and Computer Engineering Control and Intelligent Processing Center of Excellence University of Tehran Tehran Iran Institute of Automation University of Bremen Otto-Hahn-Allee NW1 D-28359 Bremen Germany

ISBN: (纸本)008045108X

This paper deals with the implementation of Haar wavelet to the optimal control of linear singularly perturbed systems. The approximated composite control and the slow and fast trajectories with respect to a quadratic cost function by solving only the linear algebraic equations are calculated. The results are illustrated with a simple example. Copyright © 2005 IFAC.

关键词： Cost functions

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Design and implement the stimuli capsule at in-vitro experiment

Design and implement the stimuli capsule at in-vitro experim...

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TENCON 2005 - 2005 IEEE Region 10 Conference

作者： Woo, S.H. Yoon, K.W. Lee, J.H. Moon, Y.K. Won, C.H. Kim, T.W. Choi, H.C. Cho, J.H. School of Electronic Engineering and Computer Science Kyungpook National University Korea Republic of Department of Computer Control and Electrical Engineering Kyungil University Korea Republic of College of Veterinary Medicine Dept. of Physiology Kynugpook National University Advanced Research Center for Recovery of Human Sensibility Kyungpook National University Korea Republic of

ISBN: (纸本)0780393112

Recently, the capsule endoscope has been developed to observe image from the inside intestine. Such a capsule endoscope does not have locomotion or hold by it self. To get proper diagnosis and meditation, it is necessary to control capsule from outside to enable to guide locomotion. The designed and implemented capsule has feasibility to contracts the small intestine by electrical stimulus from stimulus pad. When the small intestine is contracted by electrical stimulus, the capsule can move to opposite direction which can boost moving speed of the capsule or change moving direction. The implemented stimuli capsule always monitors excessive energy transmit and automatically shut down electrical stimuli to make more secure. Also the stimuli capsule goes to stand by mode to save battery, and reset by comparator circuit which is connected to two stimulus pad. To verify the design and implement stimuli capsule, in-vitro experiments are performed with pig's small intestine.

关键词： Medical imaging

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Blind signal separation and reverberation cancelling with active sonar data

Blind signal separation and reverberation cancelling with ac...

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8th International Symposium on Signal Processing and its Applications, ISSPA 2005

作者： Cong, Fengyu Hu, Yifan Shi, Xizhi Chen, Chi Hau Lin, Liangji State Key Laboratory of Vibration Shock and Noise Shanghai Jiao Tong University Dongchuan Road 800# Shanghai China Electrical and Computer Engineering Dept. University of Massachusetts Dartmouth Dalian Scientific Test and Control Technology Institute

ISBN: (纸本)0780392434

With easily available prior knowledge, we explore a new approach for nulling of reverberation through separating active sonar data into reverberation and moving target echo. From the perspective of signal processing, the method, as outlined below, is based on active sonar data properties and the process of how reverberation is formulated. It is assumed that active sonar data can be separated into two parts that are target echo signal and reverberation. First, we generate a backward matrix from active sonar data to approximate the classical blind signal separation model. Second, after blind signal separation is performed on the backward matrix, separation is done. Third, the estimated signal with the largest kurtosis is selected as the desired target echo signal and the reverberation is cancelled at the same time. Fourth, the human hearing feature helps the process to be adaptive. The real sea experiment proves the method to be effective. © 2005 IEEE.

关键词： Blind source separation

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A Solar-powered Battery Charger with Neural Network Maximum Power Point Tracking Implemented on a Low-Cost PIC-microcontroller

A Solar-powered Battery Charger with Neural Network Maximum ...

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International Conference on Power Electronics and Drive Systems (PEDS)

作者： P. Petchjatuporn W. Ngamkham N. Khaehintung P. Sirisuk W. Kiranon Control and Instrumentation Engineering Dept. Mahanakorn University of Technology Bangkok THAILAND Computer Engineering Dept. Mahanakorn University of Technology Bangkok THAILAND Telecommunication Engineering Dept Mahanakorn University of Technology Bangkok THAILAND

This paper presents the development of a maximum power point tracking algorithm using an artificial neural network for a solar power system. By applying a three layers neural network and some simple activation functions, the maximum power point of a solar array can be efficiently tracked. The tracking algorithm integrated with a solar-powered battery charging system has been successfully implemented on a low-cost PIC16F876 RISC-microcontroller without external sensor unit requirement. The experimental results with a commercial solar array show that the proposed algorithm outperforms the conventional controller in terms of tracking speed and mitigation of fluctuation output power in steady state operation. The overall system efficiency is well above 91%

关键词： Batteries Neural networks Artificial neural networks Power engineering and energy Solar energy Photovoltaic systems Solar power generation Photovoltaic cells Adaptive arrays Logic arrays

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Cooperative control of Large Systems

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Lecture Notes in control and Information Sciences 2005年 309卷 119-136页

作者： Khatir, Maziar E. Davison, Edward J. Systems Control Group Dept. of Electrical and Computer Engineering University of Toronto Toronto ON M5S 3G4 Canada

ISBN: (纸本)3540228616

"Cooperative control" is a term which is used to capture those problem areas in which some type of repetition of identical or non-identical subsystems, which are interconnected together, occurs. Such systems are often found in nature, i.e. in the motion of clusters of birds, fish, insects, etc. moving together, in the cell structure of mammals and life-forms, and also in the man-made systems such as in transportation systems. In such systems, a decentralized control configuration is often applied to control the overall system, so that some common objective is achieved. It is perhaps too early to be able to list the fundamental problems arising in this problem area;there is however one important application area in which an understanding of the behaviour of the near-identical objects is desirable, and that is with respect to disease processes associated with the abnormal behaviour of certain organs of the human body. This paper gives a review of such typical example systems for the case of: "fish-like" objects interacting in water. vehicles which have the front wheel drive / steering interacting in a string formation. analyzing the behaviour of intestinal slow-wave patterns which occur in the human body. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Fish

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SAFETY ISSUES IN AVIONICS AND AUTOMOTIVE DATABUSES

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IFAC Proceedings Volumes 2005年第1期38卷 26-31页

作者： Janusz Zalewski Dawid Trawczyński Janusz Sosnowski Andrew Kornecki Marek Śnieżek Computer Science Department Florida Gulf Coast University Fort Myers FL 33928 USA Institute of Computer Science Warsaw University of Technology Nowowiejska 15/19 00-665 Warsaw Poland Dept. of Computer & Software Engineering Embry-Riddle Aeronautical University Daytona Beach FL 32114 USA Dept. of Control & Computer Engineering Rzeszów University of Technology 35–959 Rzeszów Poland

In avionics and automotive applications of computing, special care must be taken of issues related to safety. Assurance must be provided that computer hardware or software does not contribute to situations, which may cause loss of life or significant property damage. One aspect of this concern is the design of databuses, which provide a medium to exchange information among various electronics devices in a vehicle. Unfortunately, only a few aspects of bus design have been sufficiently covered in the research studying system safety. This paper reviews and compares available information on bus specifications. Databuses are discussed regarding their properties, such as signal characteristics and bus protocols, with respect to safety.

关键词： Safety-Critical Systems Databus Avionics CAN TTP FlexRay IEEE-1394

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Automobile lane detection System-on-Chip integrated with mixed signal mode CMOS image sensor

Automobile lane detection System-on-Chip integrated with mix...

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9th International Symposium on Consumer Electronics 2005, ISCE 2005

作者： Hsiao, Pei-Yung Cheng, Hsien-Chein Yeh, Chun-Wei Huang, Shih-Shinh Fu, Li-Chen IEEE Department of Electronic Engineering Chang Gung University Tao-Yuan Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan Genesyslogic Co. Ltd. Circuit Layout Department Dept. of Electronic Engineering and Information Management Chang Gung University Department of Electrical Engineering Department of Computer Science and Information Engineering National Taiwan University Robotics and Automation Society Automatic Control Society Chinese Automatic Control Society Chinese Institute of Automation Engineers

In this paper, we aim at developing a System-on-Chip, SoC, which can capture image as well as produce vehicle lane map at the same time. We adopt Peak-Finding based lane detection algorithm that can achieve high recognition rate about 96% even under various weather conditions. The features of the proposed SoC are a single low-cost and compact chip which implements the lane detection algorithm with mixed signal mode CMOS image sensor. Therefore, it can be easily used in thousands of consumer electronics for intelligent automobile applications. © IEEE.

关键词： Image sensors

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