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International Conference on control and Automation (ICCA)

作者： Chuan Sun Yongji Wang Xiangou Zhu Department of Mechanic and Dynamic Engineering HuangShi Polytechnic College Huangshi Hubei China Department of Automatic Control Huazhong University of Science and Technology Wuhan Hubei China College of Computer Science and Engineering WenZhou University Wenzhou Zhejiang China

In this paper, using the fuzzy theory and gray theory, a concept of the degree of fuzzy infection and a new reliability analysis method based on the relation of fuzzy infection were proposed, and the mathematical mode of series connection and parallel connection system was first set up and their rationalities were proven. An illustrational example was given to demonstrate the effectiveness of this theory.

关键词： Fuzzy systems Reliability theory Fuzzy control Fuzzy set theory Reliability engineering Educational institutions Sun control systems computer science Failure analysis

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Auto-tuning PID controller of Internet congestion control system

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Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural science Edition) 2005年第SUPPL.期35卷 67-70页

作者： Yang, Hongyong Zhang, Fuzeng Lin, Xiangze Zong, Guangdeng Department of Computer Science and Technology Yantai Normal College Yantai 264025 China Department of Automatic Control Engineering Southeast University Nanjing 210096 China Institute of Automation Qufu Normal University Qufu 273165 China

Internet congestion control system is considered as a closed-loop feedback system with time-delay. A proportional-integral-differential (PID) controller is then established as active queue management (AQM) scheme to adjust the congestion marked possibility at the links in Internet, whose parameters is auto-tuned by applying the minimization of an integral criterion for adapting the change of the network system. The simulations show that the new AQM scheme can control the size of the queue in the buffer to an expected length and has the robustness for the loading perturbation and the parameter change in the network.

关键词： Congestion control (communication)

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Development of a Hybrid Element by using Sponge Core Soft Rubber Actuator

Development of a Hybrid Element by using Sponge Core Soft Ru...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Y. Hayakawa S.R. Pandian Department of Electrical and Control Engineering Nara National College of Technology Yamato-Koriyama Nara Japan Department of Electrical Engineering and Computer Science Tulane University New Orleans LA USA

In this paper, we investigate a new type of hybrid element to realize a human-friendly support device. The element is a flexible actuator (called Sponge Core Soft Rubber Actuator) and its structure is a soft mechanism in which a sponge rubber is covered with silicone rubber. In addition to its actuation capability, the element can estimate external forces by making use of the relation between inner pressure and external force. Therefore, the element can be used as a hybrid element that has both actuator and force sensor functions. This paper discusses the hybrid element design, actuator characteristics, and force control and sensing abilities of the element. Experimental results are presented to illustrate the practical effectiveness of the proposed hybrid element.

关键词： Rubber Senior citizens Pneumatic actuators Humans Bones Pneumatic systems Pressure control Force sensors Force control Compressors

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Efficiency of Local Genetic Algorithm in Parallel Processing

Efficiency of Local Genetic Algorithm in Parallel Processing

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IEEE International Conference on Parallel and Distributed Computing, Applications and Technologies (PDCAT)

作者： Gang Peng I. Iimura T. Nakatsuru S. Nakayama Department of Computer and Control Engineering Oita National College of Technology Oita Japan Department of Administration Faculty of Administration Prefectural University of Kumamoto Kumamoto Japan Department of Information and Computer Science Faculty of Engineering Kagoshima University Kagoshima Japan

This paper discusses a parallel genetic algorithm (GA) which focuses on the local operator for Traveling salesman problem (TSP). The local operator is a simple GA named as Local Genetic Algorithm (LGA). The LGA is combined to another GA named as Global Genetic Algorithm (GGA). It increases the computational time running a GA as a local operator in another one. To solve this problem, we build a parallel system based on our previous works for running the LGA to speed up the process. The results show that LGA improve the search quality significantly and it is more efficient running LGA with parallel system than single CPU.

关键词： Genetic algorithms Parallel processing Cities and towns Genetic mutations control engineering computing Concurrent computing control engineering Educational institutions Traveling salesman problems computer science

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Improved rotor position estimation for the sensorless control system of SRM

Improved rotor position estimation for the sensorless contro...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Won-Sik Baik Min-Huei Kim Nam-Hun Kim Dong-Hee Kim Kyeong-Ho Choi Don-Ha Hwang Jung-Soo Jang School of Electrical & Electronic Engineering Yeungnam University Gyeongsan South Korea Department of Elec. Engineering Yeungnam College of Science and Technology Daegu South Korea Department of Electrical Engineering Kyeongbuk College South Korea Korea Electrotechnology Research Institute Changwon South Korea School of Computer Control & Electrical Engineering Kyungil University Gyeongsan South Korea

In this paper, improved rotor position estimation for position sensorless control system of the switched reluctance motor (SRM) is presented. For more accurate rotor position estimation, the phase locked loop (PLL) based position interpolation is adapted. In the current-flux-rotor position lookup table based rotor position estimation, the inherent current and flux-linkage ripple can cause the position estimation error. Instead of the conventional low-pass filter, the PLL based position interpolation technique is used for the better dynamic performance. The developed rotor position estimation scheme is realized using TMS320 F2812 digital signal processor and prototype 1-hp SRM.

关键词： Sensorless control Rotors Reluctance motors Reluctance machines Phase locked loops Interpolation Phase estimation Table lookup Estimation error Low pass filters

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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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IEEE Region 10 International Conference TENCON

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

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： In vitro Intestines Endoscopes Energy consumption Batteries Circuits Valves Moon Design engineering computer science

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Generating multi-folded torus chaotic attractors

Generating multi-folded torus chaotic attractors

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International Conference on Physics and control

作者： Simin Yu Jinhu Lu Henry Leung Guanrong Chen College of Automation Guangdong University of Technology Guangzhou China Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy and Sciences Beijing China Department of Electrical and Computer Engineering University of Calgary AB Canada Department of Electronic Engineering City University of Hong Kong China

A systematic methodology for generating multi-folded torus chaotic attractors from a simple three-dimensional piecewise-linear system is presented in this paper. Theoretical analysis shows that multi-folded torus chaotic attractors can be created via alternative switching between two piecewise-linear systems. A novel circuit diagram is designed for physically creating multi-folded torus chaotic attractors. This is the first time in the literature to experimentally verify a maximum 9-folded torus chaotic attractor that is generated by an analog circuit.

关键词： Chaos Piecewise linear techniques Oscillators Laboratories Analog circuits Electric breakdown Bifurcation Educational institutions Automation Automatic generation control

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Application of detecting algorithm based on network

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Journal of Harbin Institute of Technology(New Series) 2004年第3期11卷 275-280页

作者：张凤斌杨永田江子扬孙冰心 College of Computer Science and Technology Harbin Engineering University Harbin 150001China Computer and Control College Harbin University of Science and Technology Harbin 150080China College of Computer Science and Technology Harbin Engineering University Harbin 150001China Computer and Control College Harbin University of Science and Technology Harbin 150080China

Because currently intrusion detection systems cannot detect undefined intrusion behavior effectively, according to the robustness and adaptability of the genetic algorithms, this paper integrates the genetic algorithms into an intrusion detection system, and a detection algorithm based on network traffic is proposed. This algorithm is a real-time and self-study algorithm and can detect undefined intrusion behaviors effectively.

关键词： network security intrusion detection anomaly

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KINGPINS OR MULES: AN ANALYSIS OF DRUG OFFENDERS INCARCERATED IN FEDERAL AND STATE PRISONS

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Criminology & Public Policy 2006年第3期3卷

作者： ERIC L. SEVIGNY JONATHAN P. CAULKINS Eric L. Sevigny is a Ph.D. student in the Graduate School of Public and International Affairs at the University of Pittsburgh. Mr. Sevigny's research interests lie in the area of drug policy with an emphasis on enforcement sanctioning international control and treatment/harm reduction. His previous experience includes substance abuse counseling and substance abuse treatment needs research of special populations including prisoners the homeless and adolescents. Mr. Sevigny received a B.A. in Psychology from Middlebury College. Jonathan P. Caulkins Ph.D. is Professor of Operations Research and Public Policy at Carnegie Mellon University's Heinz School of Public Policy. Dr. Caulkins specializes in mathematical modeling and systems analysis of social policy problems with a particular focus on issues pertaining to drugs crime violence and prevention. Dr. Caulkins has also published on airline operations sulfur dioxide pollution trading markets Internet-based advertising flexible manufacturing systems and personnel performance evaluation among other topics. At RAND he has been a consultant visiting scientist codirector of RAND's Drug Policy Research Center (1994–1996) and founding director of RAND's Pittsburgh office (1999–2001). Dr. Caulkins received a B.S. and M.S. in Systems Science from Washington University and an S.M. in Electrical Engineering and Computer Science and Ph.D. in Operations Research both from M.I.T.

Research Summary: Drug policy reformers and defenders contest the extent to which low-level drug offenders are being sent to prison and for how long. Using data from the Survey of Inmates in Federal and State Correctional Facilities, 1997 (BJS, 2000), we assess the seriousness of incarcerated drug offenders along dimensions of dangerousness, culpability, and harm—specifically, functional role and drug group participation, type and amount of drugs, firearms involvement, and criminal conviction and arrest history. We find that only about 1.6% of federal and 5.7% of state inmates can be described as “unambiguously low-level.” Alternatively, not many are “kingpins.” Rather, most fall into a middle spectrum representing different degrees of seriousness that depend on what factors are emphasized. Policy Implications: Our findings dampen hopes of dramatically reducing prison populations by getting out of prison those who are unambiguously low-level drug offenders. They simply do not represent the majority of incarcerated drug offenders. In particular, most played some role in distribution, so eliminating prison terms for users (decriminalization) would not have affected many now in prison. Indeed, if decriminalization increased demand, it could plausibly increase prison populations by increasing the number of suppliers still subject to imprisonment. On the other hand, “drug courier exceptions” to sentencing laws that apply to minor role offenders possessing large quantities could have a greater prison reduction impact.

关键词： Incarceration, Drug Policy, Inmate Surveys, Low-Level Drug Offenders, Culpability

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A novel control method for the compensation voltages in dynamic voltage restorers

A novel control method for the compensation voltages in dyna...

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19th Annual IEEE Applied Power Electronics Conference and Exposition - APEC 2004

作者： Lee, Sang-Joon Kim, Hyosung Sul, Seung-Ki Sch. of Elec. Eng./Computer Science Seoul National University Korea Republic of Deptartment of Control Engineering Cheonan National Technical College Korea Republic of

This paper discusses the control of the compensation voltages in dynamic voltage restorers (DVR). On analyzing the power circuit of a DVR system, control limitations and control targets are presented for the compensation voltage control. Based on the preceeded power stage analysis, a novel controller for the compensation voltages in DVRs is proposed by a feedforward control scheme. This paper also discusses the time delay problems in the control system of DVRs. Digital control systems inevitably have control delay due to its the sampling of signal, the switching frequency of an inverter, and the signal delay due to sensor itself. The total signal delay is considerable in real implementation and it endanger the system stablity. This paper analyzes the relationship among the control delay, closed loop damping factor, and the output filter parameters of DVR inverters. Based on the control system analysis, a guideline is proposed to design the appropriate output filter parameters and the inverter switching frequency for DVRs. The proposed theory is verified by an experimental DVR system, which is controlled in full digital manner.

关键词： Voltage control

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