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第三十三届中国控制会议

作者： WU Chao LI Shihua YANG Jun GUO Lei School of Automation Southeast University & Key Laboratory of Measurement and Control of Complex Systems of EngineeringMinistry of Education School of Automation Science and Electrical Engineering Beihang University & Institute of Instrument Science and Opto-Electronics Engineering

ISBN: (纸本)9781479947249

Tracking law designed for future Mars entry missions is investigated in this article. For precision landing, the nonlinear entry dynamics, complex uncertainties and input saturation constraints are unavoidable problems. Facing these challenges, the Mars entry trajectory tracking scheme via constrained multi-model predictive control(CMPC) is employed. The CMPC is made up of some constrained predictive control(CPC) in different time domain during the Mars entry mission. Each constrained predictive controller consists of a linearized prediction model(obtained by linearizing at different operating point), feedback correction for active model mismatch rejection caused by the complex uncertainties, and constrained rolling optimization for a smooth control input under a saturation constraint. Monte Carlo simulations demonstrate the effectiveness and excellence of the proposed method under the saturation constraint of input and uncertainties of initial state and aerodynamic parameters such as atmospheric density, ballistic coefficient and lift-to-drag ratio.

关键词： Mars Entry,Trajectory Tracking,Constrained Multi-Model Predictive control,Monte Carlo Simulation

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Novel Embedded System Design and Implementation for Automatic Platelet Aggregometer 33

Novel Embedded System Design and Implementation for Automati...

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第三十三届中国控制会议

作者： JU Ben MA Xudong FANG Fang XU Xin DONG Ziquan SINNOWA Medical Science & Technology Co. LTD School of Automation Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSoutheast University

ISBN: (纸本)9781479947249

The platelet aggregation function analysis is applied in clinical research and application more and more *** this paper,an automatic double-channel platelet analysis system PL12 is designed and *** system framework is based on embedded processor ARM and DSP architecture,in which a signal modulation circuit is *** an analog to digital conversion scheme is proposed and realized for measuring weak pulse signals of blood *** principle of control system and management software is also *** validate the high efficiency,precision and stability of the system.

关键词： double-channel,platelet aggregation,signal acquisition,embedded systems

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Attitude synchronization for multiple flexible spacecraft based on non-smooth control 19

Attitude synchronization for multiple flexible spacecraft ba...

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

作者： Du, Haibo He, Yigang Li, Shihua Cheng, Yingying Chen, Xisong School of Electrical Engineering and Automation Hefei University of Technology Hefei230009 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing210096 China

ISBN: (纸本)9783902823625

This paper considers the problem of attitude synchronization for a group of flexible spacecraft based on distributed attitude cooperative control strategy. Based on the backstepping design, non-smooth control, and the neighbor-based design rule, a distributed attitude control law is constructed step by step. Under the proposed control law, it is shown that the attitude synchronization is achieved asymptotically and the induced vibration by flexible appendages is simultaneously suppressed. © IFAC.

关键词： control theory

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Adaptive fuzzy control of output-constrained switched nonlinear systems

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ICIC Express Letters 2015年第12期9卷 3355-3362页

作者： Niu, Ben Liu, Yanli Shen, Mouquan School of Control Science and Engineering Dalian University of Technology No. 2 Linggong Road Ganjingzi District Dalian China College of Mathematics and Physics Bohai University No. 19 Keji Road New Songshan District Jinzhou China Automation Research Institute Bohai University No. 19 Keji Road New Songshan District Jinzhou China College of Electrical Engineering and Control Science Nanjing Technology University Nanjing China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Nanjing China

In this paper, the problem of adaptive fuzzy tracking control is considered of uncertain switched nonlinear systems with an output constraint. First, a barrier Lyapunov function (BLF) is employed to deal with the output constraint. Then fuzzy logic systems are used to approximate the unknown nonlinearities and backstepping technique is employed to construct an adaptive fuzzy controller. The designed controller guarantees all the closed-loop signals remain bounded while the system output converges to a small neighborhood of the desired reference signal without violating the constraint. An example is given to demonstrate the validity of the developed result. © 2015 ICIC International.

关键词： Lyapunov functions

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Global Stabilization via Sampled-Data Output Feedback control for a Class of Nonlinear Systems Subject to Time-Delays

Global Stabilization via Sampled-Data Output Feedback Contro...

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第三十四届中国控制会议

作者： Hongyan Chu Chunjiang Qian Jiquan Yang Shengyuan Xu Wenting Zha Department of Energy and Mechanical Engineering Nanjing Normal University Key Laboratory of 3D Printing Equipment and Manufacturing Nanjing Normal University School of Automation Nanjing University of Science and Technology Department of Electrical & Computer Engineering The University of Texas at San Antonio Key Laboratory of Measurement and Control of CSE Ministry of Education School of Automation Southeast University

ISBN: (纸本)9781467374439

This paper considers the problem of global output feedback stabilization via sampled-data control for a class of uncertain nonlinear systems subject to time delays. The system satisfies a lower-triangular linear growth condition with unknown growth rates. A new inductive method is first introduced to estimate the state growth in the presence of time delays and nonvarnishing nonlinearities. When only the output of the system is measurable, with the help of output domination approach, a sampled-data output feedback controller is constructed to solve the global stabilization problem. The proposed sampled-data controller is linear in structure and therefore can be easily implemented in practice.

关键词： Sampled-data,output feedback,time delay,domination approach

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A novel fiber Bragg grating ac current transformer with temperature-compensation

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Guangdianzi Jiguang/Journal of Optoelectronics Laser 2015年第12期26卷 2288-2293页

作者： Sun, Fei-Fei Zhao, Hong Zhang, Kai-Yu Key Laboratory on Engineering Dielectric and Its Application of Ministry of Education College of Measurement and Control Technology and Communication Engineering Harbin University of Science and Technology Harbin China

In order to eliminate the influence of the temperature in current measurement, a fiber Bragg grating (FBG) alternative current transformer with temperature compensation is proposed. Two FBGs and the giant magnetostrictive material (GMM) which is composed of sensing unit are placed in two adjacent and symmetrical ferromagnetic circuits, respectively. The ferromagnetic circuits are loaded with two opposite direct current bias magnetic fields. We realize the demodulation of two fiber FBGs and the measurement of alternative current by using matching detection. Finally, it is suggested that with the influence of temperature, the static working point of the system is almost unchanged, and in the linear region, the maximum measured current is 93.78 A with 1.68% full scale accuracy. This kind of FBG current sensor can not only measure alternative current but also realize direct current measurement. © 2015, Board of Optronics Lasers. All right reserved.

关键词： Electric instrument transformers

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Obstacle avoidance path planning for harvesting robot manipulator based on MAKLINK graph and improved ant colony algorithm

Obstacle avoidance path planning for harvesting robot manipu...

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2014 International Conference on Sensors Instrument and Information Technology, ICSIIT 2014

作者： Ji, Wei Li, Jun Le Zhao, De An Jun, Yang School of Electrical and Information Engineering Jiang Su University Zhen Jiang 212013 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing 210096 China

ISBN: (纸本)9783038350392

To the problems of real-time obstacle avoidance path planning for apple harvesting robot manipulator in dynamic and unstructured environment, a method based on improved ant colony algorithm is presented. Firstly, Vector description is utilized to describe the area where obstacles such as branches is located as irregular polygon in free space, and MAKLINK graph is used to build up the environment space model. Then, the improved Dijkstra algorithm is used to find the initial walk path for apple harvesting robot manipulator. Finally, the improved ant colony algorithm is applied to optimize the initial path. The experiment result shows that the proposed method is simple and the robot manipulator can avoid the branches to pick the apple successfully in a relatively short time. © (2014) Trans Tech Publications, Switzerland.

关键词： Motion planning

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Face Recognition Based on Low-Rank Matrix Representation 33

Face Recognition Based on Low-Rank Matrix Representation

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第三十三届中国控制会议

作者： NGUYEN Hoang Vu HUANG Rong YANG Wankou SUN Changyin School of Automation Southeast University Faculty of Industrial Technology Tien Giang UniversityMy Tho 860000Viet Nam Key Lab of Measurement and Control of Complex Systems of Engineering Ministry of Education

ISBN: (纸本)9781479947249

Based on the recent success of Low-Rank matrix Representation(LRR),we propose a novel classification method for robust face recognition,named LRR-based Classification(LRRC).By the ideal that if each data class is linearly spanned by a subspace of unknown dimensions and the data are noiseless,the lowest-rank representations of a set of test vector samples with respect to a set of training vector samples have the nature of being both dense for within-class affinity and almost zero for between-class ***,the LRR exactly reveals the classification of the *** experimental results demonstrate that LRRC has competitive with state-of-the-art classification methods.

关键词： Low rank representation,Face recognition,Feature extraction,Classification,Sparse representation

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Consensus-based distributed estimation in homogeneous sensor networks

Consensus-based distributed estimation in homogeneous sensor...

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International Conference on control and Automation (ICCA)

作者： Ya Zhang Yu-Ping Tian Ministry of Education Key Laboratory of Measurement and Control of Complex Systems of Engineering Nanjing China

This paper studies distributed estimation of linear dynamical target in homogeneous sensor networks. Just some sensors can get observations of the target. A distributed estimator composing of Luenberger observers and consensus strategy is applied. Based on spectral radius analysis and algebraic graph theory, necessary conditions of distributed detectability are given for time-invariant and randomly switching networks, respectively. By applying Lyapunov functional analysis and solving a special LQR problem, sufficient detectability conditions are proposed for both networks. The sufficient conditions are composed of an explicit inequality concerning weights, topology switching probabilities and the eigenvalues of the target's system matrix. Simulation examples are given to illustrate the results.

关键词： Topology Network topology Sensors Switches Estimation Noise Loss measurement

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Study on short periodic solutions of a discretized second-order sliding-mode control system

Study on short periodic solutions of a discretized second-or...

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International Workshop on Variable Structure Systems, VSS

作者： Xiangyu Wang Shihua Li Ministry of Education Key Laboratory of Measurement and Control of Complex Systems of Engineering Nanjing China

In this paper, short periodic solutions of a discretized second-order sliding-mode control system are investigated. Specifically, the existence and stability of short periodic solutions are analyzed. Moreover, the exp... 详细信息

关键词： Orbits Manifolds Stability analysis educational institutions Sliding mode control Trajectory Switches

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