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Design of Adaptive Robust Guaranteed Cost controller for Wind Power Generator

International Journal of Automation and computing 2013年第2期10卷 111-117页

作者： Zhong-Qiang Wu Jian-Ping Xie Key Laboratory of Industrial Computer Control Engineering Yanshan University

According to the increasing requirement of the wind energy utilization and the dynamic stability in the variable speed variable pitch wind power generation system, a linear parameter varying （LPV） system model is established and a new adaptive robust guaranteed cost controller （AGCC） is proposed in this paper. First, the uncertain parameters of the system are estimated by using the adaptive method, then the estimated uncertain parameters and robust guaranteed cost control method are used to design a state feedback controller. The controller s feedback gain is obtained by solving a set of linear matrix inequality （LMI） constraints, such that the controller can meet a quadratic performance evaluation criterion. The simulation results show that we can realize the goal of maximum wind energy capture in low wind speed by the optimal torque control and constant power control in high wind speed by variable pitch control with good dynamic characteristics, robustness and the ability of suppressing disturbance.

关键词： Wind power generator linear parameters varying （LPV） system adaptive control robust control guaranteed cost control

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Energy based set point modulation for obstacle avoidance in haptic teleoperation of aerial robots 19

Energy based set point modulation for obstacle avoidance in ...

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Hou, Xiaolei Yu, Changbin Liang, Feng Lin, Zhiyun Shandong Computer Science Center Jinan250014 China Australian National University CanberraACT0200 Australia College of Electrical Engineering State Key Laboratory of Industrial Control Technology ZheJiang University Hangzhou310027 China

ISBN: (纸本)9783902823625

This paper presents a novel obstacle avoidance approach that is capable of dealing with both static and dynamic obstacles in the environment with guaranteed collision-free navigation for haptic teleoperation of VTOL aerial robots. The proposed approach modulates the set point for the vehicle's controller based on the user input energy, estimated potential energy and vehicle's kinetic energy. By shuffling the potential and kinetic energy, vehicle's velocity is regulated according to the permissible kinetic energy and thus obstacle avoidance is achieved. With careful design of the potential field, this approach offers a guaranteed collision-free navigation with the presence of both stationary and moving obstacles. Incorporating the novel approach with the Dynamic Kinesthetic Boundary, the human operator can better perceive the environment where the robot is deployed through the rich spatial haptic cues rather than an onset gradual single force vector. Analysis is provided and proves that in the case of perfect velocity tracking of the slave system, the proposed algorithm can guarantee a collision-free navigation through the environment. Simulations and experiments were conducted, and the results provide verification of the effectiveness of the proposed approach in obstacle and collision avoidance for haptic teleoperation of aerial robots. © IFAC.

关键词： Robots

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26th Annual Computational Neuroscience Meeting (CNS*2017) of the Organization for Computational Neuroscience Antwerp, Belgium, July 15-20, 2017

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BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 59-59页

作者： [Anonymous] Indiana University Purdue University Indianapolis Indianapolis IN 46032 USA Stark Neurosciences Research Institute Indiana University School of Medicine Indianapolis IN 46032 USA Department of Mathematics East Carolina University Greenville NC 27858 USA Jülich Supercomputing Centre Forschungszentrum Jülich 52425 Jülich Germany Future Systems Swiss National Supercomputing Centre 8092 Zurich Switzerland User Engagement and Support Swiss National Supercomputing Centre 6900 Lugano Switzerland Institut de Neurosciences des Systèmes Aix Marseille Univ 13005 Marseille France Simulation Lab Neuroscience Forschungszentrum Jülich Jülich Germany Department of Experimental Psychology Ghent University 9000 Ghent Belgium Donders Center for Cognitive Neuroimaging Radboud University 6525HR Nijmegen The Netherlands Department of Electrical Computer and Energy Engineering University of Colorado Boulder CO 80309 USA Department of Neurosurgery Johns Hopkins School of Medicine Baltimore MD 21287 USA Department of Neurology Johns Hopkins School of Medicine Baltimore MD 21287 USA Department of Otolaryngology Johns Hopkins School of Medicine Baltimore MD 21287 USA INSERM U968 Paris France Sorbonne Universités UPMC University Paris 06 UMR_S 968 Institut de la Vision Paris France CNRS UMR_7210 Paris France Department of Computer Architecture and Technology University of Granada (CITIC) Granada Spain Sorbonne Universités UPMC Univ Paris 06 INSERM CNRS Institut de la Vision Paris France Department of Adaptive Machine Systems Osaka University Osaka Japan Department of Computer Science University of Cergy-Pontoise Cergy-Pontoise France Department of Physics and Astronomy College of Charleston Charleston SC 29424 USA School of Physics Faculty of Science University of Sydney Sydney NSW 2006 Australia Center of Excellence for Integrative Brain Function Australian Research Council Sydney Australia Max Planck Institute for Human Cognitive and Brain Sciences Saxony Lei

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Formation merging control in 3D under directed and switching topologies 19

Formation merging control in 3D under directed and switching...

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Han, Tingrui Lin, Zhiyun Fu, Minyue College of Electrical Engineering ZheJiang University 38 Zheda Road Hangzhou310027 China State Key Laboratory of Industrial Control Technology College of Electrical Engineering ZheJiang University 38 Zheda Road Hangzhou310027 China School of Electrical Engineering and Computer Science University of Newcastle CallaghanNSW2308 Australia Department of Control Science and Engineering ZheJiang University 38 Zheda Road Hangzhou310027 China

ISBN: (纸本)9783902823625

The paper studies the formation merging problem for a leader-follower network. That is, how to control a team of agents called followers so that they are merged with a team of agents called leaders to form a larger globally rigid formation. Under the premise that a group of leaders move in a globally rigid formation with their synchronized velocity known to the followers, we show that the followers can asymptotically merge themselves to the formation for arbitrarily initial configurations. Each follower selects its neighbors and also its control law according to the target formation they aim to achieve and thus it allows directed and time-varying switching topologies. It is shown that a globally rigid formation can be merged asymptotically for the leader-follower network in a setup with directed and time-varying graphs if and only if every follower frequently has a joint path from at least a leader. © IFAC.

关键词： Multi agent systems

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Over-production of α-ketoglutarate by the Corynebacterium glutamate

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Journal of Chemical and Pharmaceutical Research 2014年第6期6卷 586-592页

作者： Xie, Pei Xie, Xixian Xu, Qingyang Zhang, Chenglin Chen, Ning National and Local United Engineering Lab of Metabolic Control Fermentation Technology Tianjin University of Science and Technology Tianjin China Tianjin Engineering Lab of Efficient and Green Amino Acid Manufacture Tianjin University of Science and Technology Tianjin China Key Laboratory of Industrial Microbiology of Education Ministry Tianjin University of Science and Technology Tianjin China Metabolic Engineering Laboratory College of Biotechnology Tianjin University of Science and Technology Tianjin Economic and Technological Development Area No.29 13 Main Street Tianjin China

Previous studies have shown that over-production of glutamate pathway is α-KG to glutamate by through the gdh of ***, deleting the gdh gene block the generation of glutamate. The strain with gdh distruped showed no L-gluDH activities, resulting in up to 14.7 times α-KG production than the original strain in flask culture. There results suggest that L-gluDH is the key enzyme in the generation of glutamate. Over-expression of pyruvate carboxylase can enhance CO2 fixed and improve the metabolism stream of pyruvate to oxaloacetate. The result is that the strain C. glutamicum KGA-2pXMJ19pep α-KG production increased 15.7% more than the original strain. Our results can be applied in the industrial production of α-KG by using *** as producer. © 2014, Journal of Chemical and Pharmaceutical Research. All rights reserved.

关键词： Genes

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A Partial-State Observer for a Class of MIMO Nonlinear Systems

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IFAC Proceedings Volumes 2014年第3期47卷 3676-3681页

作者： Lei Wang Alberto Isidori Hongye Su Weihua Xu State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University 310027 Hangzhou P.R.China Department of Computer Control and Management Engineering University of Rome “La Sapienza” Rome Italy

In this paper, we consider input-affine invertible MIMO nonlinear systems which can be transformed into a special normal form by means of the structure algorithm. The normal form highlights a partial state, a subset of state variables, which plays in this setting a role similar to that of the outputs and its derivatives in a SISO system. It is shown that, if a system in this class can be asymptotically stabilized by means of a static feedback from that partial state, then semiglobal stabilization can be achieved via dynamic feedback driven by the output of the system. The dynamic feedback in question is based a (non–trivial) extension to MIMO systems of the standard high–gain observer.

关键词： MIMO nonlinear systems structure algorithm normal forms minimum-phase systems nonlinear observers

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Fuzzy adaptive backstepping sliding mode control for the hydraulic gap nonlinear system

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Journal of Computational Information Systems 2013年第3期9卷 1113-1120页

作者： Wu, Zhongqiang Tang, Yachao Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China

In this paper, a fuzzy adaptive backstepping sliding mode controller is presented for the hydraulic gap nonlinear system with uncertain parameters and load disturbances. Fuzzy adaptive systems are employed to approximate the uncertain parameters and load disturbances, which eliminates the impacts of uncertain parameters and load disturbances. According to the characteristics of the hydraulic gap nonlinear system, the appropriate Lyapunov functions are selected to reduce the steps of the backstepping design and an effective solution is given to the problem of the explosion of calculation of the backstepping design process of high-order systems. The sliding mode control method is introduced in the final step of backstepping design to further improve the robustness of the system. In the controller design, the adaptive laws of uncertain parameters are given and the convergence of the system tracking error is proved. The simulation results show that the controller can achieve fast, accurate and stable tracking of the specified location. Copyright © 2013 Binary Information Press.

关键词： Backstepping

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A single-station location method based on long baseline interferometer 14

A single-station location method based on long baseline inte...

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14th International Symposium on Communications and Information Technologies, ISCIT 2014

作者： Ping, Li Guohong, Wang Yan, Xiaopeng Peng, Gong Shi, Wenbo Jian, Liu Beijing Institute of Technology National Key Lab. of Mechatronic Engineering and Control Beijing100081 China Northeastern University School of Computer and Communication Engineering Qinhuangdao China China Electronics Technology Group Corporation No.36 Institute Zhejiang314033 China

ISBN: (纸本)9781479944163

Conventional long baseline interferometer based Direction of Arrival (DOA) requires multi-group long baselines and short baselines to deblur. In this paper, only using the time difference of arrival (TDOA) data of long baseline interferometer can cancel the debluring shortage and achieve high-precision DOA estimation. Meanwhile iterative filtering algorithm is adopted to extract high-precision changing rate of phase difference from the fuzzy phase difference data of long baseline. Combined with the measured DF and the change rate of phase difference, particle filter algorithm is utilized to achieve high-precision single-station passive location. Parameter measurement and the distribution of location error are verified through theoretical simulations. And the simulation results demonstrate the efficiency of the single-station location method based on long baseline interferometer. © 2014 IEEE.

关键词： Time difference of arrival

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A new approach to distributed charging control for plug-in hybrid electric vehicles

A new approach to distributed charging control for plug-in h...

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第三十三届中国控制会议

作者： Yuting Mou Hao Xing Zhiyun Lin Minyue Fu Department of Control Science and Engineering Zhejiang University College of Electrical Engineering Zhejiang University State Key Laboratory of Industrial Control Technology School of Electrical Engineering and Computer Science University of Newcastle

ISBN: (纸本)9781479947249

Plug-in hybrid electric vehicles(PHEV) tend to become more widespread in the next decades. However, large penetration of PHEVs will overload the distribution system. In smart grid, the charging of PHEVs can be controlled to reduce the peak load, which is known as demand side management(DSM). In this paper, we focus on the impact of PHEV charging on low-voltage transformers. The objective is to flatten the load curve of low-voltage transformers, while each consumer's requirement for their PHEV to be charged to the required level by their specified time is satisfied. We first formulate it as a convex optimization problem and then propose a distributed water-filling-based algorithm to solve it. Proofs of optimality and numerical simulations are given to demonstrate the effectiveness of our algorithm.

关键词： Smart Grid,Demand Side Management,Plug-in Hybrid Electric Vehicle,Water Filling,Distributed Convex Optimization

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A molecular cryptography model based on structures of DNA self-assembly

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Chinese Science Bulletin 2014年第11期59卷 1192-1198页

作者： Yang, Jing Ma, Jingjing Liu, Shi Zhang, Cheng Beijing Key Laboratory of New Technology and System on Measuring and Control for Industrial Process School of Control and Computer Engineering North China Electric Power University Beijing China Key Laboratory of High Confidence Software Technologies Ministry of Education Institute of Software School of Electronics Engineering and Computer Science Peking University Beijing China

With the progress of DNA computing, DNA-based cryptography becomes an emerging interdisciplinary research field. In this paper, we present a novel DNA cryptography that takes advantage of DNA self-assembled structure. Making use of the toehold strands recognition and strand displacement, the bit-wise exclusive-or (XOR) operation is carried out to fulfill the information encryption and decryption in the form of a one-time-pad. The security of this system mainly comes from the physical isolation and specificity of DNA molecules. The system is constructed by using complex DNA self-assembly, in which technique of fluorescent detection is utilized to implement the signal processing. In the proposed DNA cryptography, the XOR operation at each bit is carried out individually, thus the encryption and decryption process could be conducted in a massive, parallel way. This work may demonstrate that DNA cryptography has the great potential applications in the field of information security.

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