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Communications and Control Engineering 2011年第9780857292551期 vii-xi页

作者： Sun, Zhendong Ge, Shuzhi Sam College Automation Science & Engineering Center for Control and Optimization South China University of Technology Guangzhou510640 China Robotics Institue and Institute of Intelligent Systems and Information Technology University of Electronic Science and Technology of China Chengdu China Department of Electrical and Computer Engineering The National University of Singapore Singapore Singapore

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Biomimetic control algorithm for the balance and locomotion of walking systems

Biomimetic control algorithm for the balance and locomotion ...

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作者： BîzdoacǍ, Nicu George Petrişor, Anca Hamdan, Hani Al Mutib, Khalid University of Craiova Faculty of Automation Computers and Electronics Caiova Romania SUPELEC Department of Signal Processing and Electronic Systems Gif-sur-Yvette France King Saud University College of Computer and Information Sciences Riyadh Saudi Arabia

ISBN: (纸本)9789898425010

Implementation of active control has much potential to contribute to the creation and construction of innovative structures. This paper summarizes recent research of the authors that is the study of biomimetic control solutions regarding balance and locomotion of robotic systems. A first goal of the work consists in identifying solutions necessary to balance the individual systems. Research has been focused both on systems with a single foot, but also on biped, tripods, quadrupeds, hexapods and octopods. Static balance is achieved by a proper mechanical design (Bizdoaca and Petrisor, 2009), but also by a corresponding load / tensioning actuators systems that can compensate for inertial elements that can lead to system stability limit. Theoretical studies have been focused on developing an efficient stepping algorithm in environment with strong uncertainties, known as SSTA algorithm. The article present a series of experiments made with servo actuated and smart actuated (based on shape memory alloy, especially) walking biomimetic structures.

关键词： Robotics

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Reducing stick-slip motion in one-dimensional nano manipulation by real-time feedback control

Reducing stick-slip motion in one-dimensional nano manipulat...

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2010 10th IEEE Conference on Nanotechnology, NANO 2010

作者： Zhang, Jing Miao, Lei Wu, Re-Bing Xi, Ning Li, Chun-Wen Wang, Yue-Chao Tarn, Tzyh-Jong Department of Automation Tsinghua University Beijing 100084 China Center for Quantum Information Science and Technology Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Beijing 110016 China Department of Electrical and Computer Engineering Michigan State University East Lansing MI 48824 United States Department of Electrical and Systems Engineering Washington University St. Louis MO 63130 United States

ISBN: (纸本)9781424470334

When a micro cantilever with a nanoscale tip is manipulated on a substrate with atomic roughness, e.g., pushing an atomic-scale sample or etching the surface of the substrate to draw desired patterns, the periodical lateral frictional forces with stochastic fluctuations will induce stick-slip motion of the cantilever tip, which may greatly influence the precision of the nano manipulation. To reduce such a stick-slip motion, we propose a feedback control strategy based on the position estimation of the cantilever tip to compensate the periodical frictional force. Numerical simulations show that the motion of the cantilever tip under feedback control can track the desired trajectory asymptotically. Our proposal can aL be extended to the case when the cantilever tip moves over a Gaussian-shape defection on the substrate and when the stochastic fluctuations in the lateral force are with non-zero correlation time. ©2010 IEEE.

关键词： Feedback control

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THD reduction with grid synchronized inverter’s power injection of renewable sources

THD reduction with grid synchronized inverter’s power injec...

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International Symposium on Power Electronics, Electrical Drives, automation and Motion, SPEEDAM

作者： Péter Görbe Attila Magyar Katalin M. Hangos Department of Electrical Engineering and Information Systems University of Pannonia Veszprém Hungary Process Control Research Group Computer and Automation Research Institute Budapest Hungary

A control method for small domestic power plants using renewable energy is described in this paper. This method is not only capable of optimizing the working point of the plant but also implements active power factor correction and lowers the extant harmonic distortion in the line. The novel element in the proposed complex controller structure is the upper harmonic controller that minimizes the amplitudes of the 3rd, 5th 7th, 9th, and the 11th upper harmonic component in the output voltage. The proposed controller has been investigated by simulation in Matlab environment, and as a result, substantial improvement of the output voltage and current waveform could be achieved. Robustness of the method against nonlinear loads has also been tested.

关键词： Power factor correction Costs Power generation Voltage control Harmonic distortion Robustness Nonlinear distortion Solar power generation Power supplies Inverters

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Coordination of a Society of Agents for Automatic Distribution System Restoration: Toward a Smart Grid

Coordination of a Society of Agents for Automatic Distributi...

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International Conference on Technologies and Applications of Artificial Intelligence (TAAI)

作者： Von-Wun Soo Men-Shen Tsai Wan-Yu Yu Yen-Bo Peng Department of Computer Science Institute of Information Systems and Applications Nakional Tsinghua University Hsinchu Taiwan Graduate Institute of Automation Technology National Taipei University of Technology Taipei Taiwan Institute of Information Systems and Applications National Tsing Hua University Hsinchu Taiwan Department of Computer Science National Tsing Hua University Hsinchu Taiwan

Establishing a smart power grid utilizing advanced agent information technology has raised much attention recently. In this paper we propose a method that is based on coordination and negotiation among a set of distributed local power committees who could together reach a consensus of “global” optimal power restoration solution in cope with local power failures after a fault is detected in a power grid. The optimality criteria can be specified by a human power manager in terms of actual operation costs such as the minimum number of switch actions. We show how local distributed agent committees whose members are essentially switch agents and power generator agents are connected locally as neighbors and can find a global optimal solution to the power restoration problem by localizing their decisions in the local committee and by communicating and negotiating via neighbors of their committee members.

关键词： Power demand Lead Proposals Switches Power distribution Protocols

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Dynamic modeling and model analysis of a large industrial synchronous generator

Dynamic modeling and model analysis of a large industrial sy...

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International Conference on Applied Electronics, AE

作者： Attila Fodor Attila Magyar Katalin M. Hangos Department of Electrical Engineering and Information Systems University of Pannonia Veszprem Hungary Process Control Research Group Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

A simple dynamic model of an industrial size synchronous generator operating in a nuclear power plant is developed in this paper based on first engineering principles. The constructed state-space model consists of a nonlinear state equation and a bi-linear output equation. It has been shown that the model is locally asymptotically stable with parameters obtained from the literature for a similar generator. The effect of load disturbances on the partially controlled generator has been analyzed by simulation using a traditional PI controller. It has been found that the controlled system is stable and can follow the set-point changes in the effective power well. The disturbance rejection of the controller is also satisfactory.

关键词： Mathematical model Equations Synchronous generators Torque Windings Rotors

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DCI - a routing decision making matrix for supporting Delay Tolerant Mobile Ad-hoc Networks

DCI - a routing decision making matrix for supporting Delay ...

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International Conference on information Science and Engineering (ICISE)

作者： Xiaogeng Zhao Peter Clayton Chunlin Shen Danhua Jia College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing China Computer Science Department Rhodes University Grahamstown South Africa Department of information Systems Department of Economics University of Posts and Telecommunications Nanjing China

This paper presents a framework for investigating opportunistic routing in Delay Tolerant Mobile Ad-hoc Networks (DTMANETs). It introduces a novel concept of Opportunistic Confidence Index (OCI). The OCI enables multiple opportunistic routing protocols to be applied as an adaptive group to improve DTMANET routing reliability, performance, and efficiency.

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A swarm intelligence based searching strategy for articulated 3D human body tracking

A swarm intelligence based searching strategy for articulate...

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IEEE computer Society Conference on computer Vision and Pattern Recognition Workshops (CVPRW)

作者： Xiaoqin Zhang Weiming Hu Xiangyang Wang Yu Kong Nianhua Xie Hanzi Wang Haibin Ling Steve Maybank College of Mathematics & Information science Wenzhou University Zhejiang China Institute of Automation National Laboratory of Pattern Recognition Beijing China School of Communication and Information Engineering Shanghai University Shanghai China School of Computer Science Beijing Institute of Technology Beijing China School of Computer Science University of Adelaide Australia Department of Computer and Information Science Temple University Philadelphia USA School of Computer Science and Information Systems Birkbeck College London UK

This paper proposes an annealed particle swarm optimization based particle filter algorithm for articulated 3D human body tracking. In our algorithm, a sampling covariance and an annealing factor are incorporated into the velocity updating equation of particle swarm optimization (PSO). The sampling covariance and the annealing factor are initiated with appropriate values at the beginning of the PSO iteration, and `annealing' is carried out at reasonable steps. Experiments with multi-camera walking sequences from the Brown dataset show that: 1) the proposed tracker can effectively alleviate the problem of inconsistency between the image likelihood and the true model; 2) the tracker is also robust to noise and body self-occlusion.

关键词： Particle swarm optimization Humans Annealing Particle filters Particle tracking Sampling methods Equations Image sampling Legged locomotion Noise robustness

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Grasping simulation of an underactuated finger mechanism for larm hand

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International Journal of Modelling and Simulation 2010年第1期30卷 87-97页

作者： Yao, S. Wu, L. Ceccarelli, M. Carbone, G. Lu, Z. School of Automation Science and Electrical Engineering Beihang University Beijing China College of Information Engineering Central University for Nationalities Beijing China State Key Laboratory of Intelligent Technology and Systems Department of Computer Science and Technology Tsinghua University Beijing China Beijing University of Aeronautics and Astronautics China and University of Cassino Italy LARM: Laboratory of Robotics and Mechatronics Cassino United States

In this paper, the grasp operation of an underactuated finger mechanism is simulated with the aim to characterize and analyze its performance. The design of the proposed mechanism is based on spring systems that give suitable underactuation characteristics. A CAD model is proposed and then it is used in a procedure for numerical simulation. Simulation results show suitable capability for grasping a wide range of objects in size and shape by operating the mechanism inside the finger body. The achieved grasp has been simulated as a human-like functionality with a grasp contact in each phalanx.

关键词： computer aided design

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Stability analysis of a class of MIMO fuzzy control systems

Stability analysis of a class of MIMO fuzzy control systems

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IEEE International Conference on Fuzzy systems (FUZZ-IEEE)

作者： Radu-Emil Precup Marius L. Tomescu Emil M. Petriu Stefan Preitl János Fodor Daniela Bărbulescu Department of Automation and Applied Informatics Polytechnic University of Timisoara Timisoara Romania “Politehnica” University of Timisoara Timisoara RO Romania Faculty of Computer Science Aurel Vlaicu University of Arad Arad Romania Faculty of Computer Science Complex Universitar Arad RO Romania University of Ottawa School of Information Technology and Engineering Ottawa ON Canada Óbuda University Institute of Intelligent Engineering Systems Budapest Hungary

This paper suggests a new stability analysis approach dedicated to a class of fuzzy control systems controlling multi input-multi output (MIMO) nonlinear processes by means of Takagi-Sugeno fuzzy logic controllers. The approach is based on LaSalle's global invariant set theorem, and an original stability theorem offers sufficient stability conditions. The applicability and efficiency of the theoretical results are illustrated by a MIMO case study dealing with the fuzzy control of a spherical three tank system.

关键词： Stability analysis Process control MIMO Fuzzy control Valves Numerical stability Lyapunov method

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