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第三十四届中国控制会议

作者： MA Yajie JIANG Bin TAO Gang College of Automation Engineering Nanjing University of Aeronautics and Astronautics Jiangsu Key Laboratory of Internet of Things and Control Technologies (Nanjing University of Aeronautics and Astronautics) Department of Electrical and Computer Engineering University of Virginia

ISBN: (纸本)9781467374439

This paper develops a new adaptive multiple-model control scheme for a class of nonlinear multiple-input multipleoutput(MIMO) dynamic systems to compensate uncertain actuator failures using an error transformation. Such an adaptive control scheme, consisting of multiple estimators, controllers and a control switching mechanism with multiple cost functions,can ensure desired system stability and asymptotic tracking properties, despite the presence of failure uncertainties. Simulation results of an application to a spacecraft model verify the effectiveness of the proposed multiple-model based adaptive control scheme.

关键词： Actuator failure,adaptive compensation,error transformation,multiple-model control

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Test point optimization of control moment gyro(CMG) based on multi-signal flow model and improved genetic algorithm

Test point optimization of control moment gyro(CMG) based on...

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2015 IEEE 12th International Conference on Electronic Measurement & Instruments

作者： Tian Limei Lu Cao Yu Jinsong Wu Dengyun Lu Ming Hu Yuewei Beijing Institute of Control Engineering School of Automation Science and Electrical Engineering Beihang University

The increasing integration degree of circuits in electronic systems makes faults detection and isolation more and more difficult. Design for testability(DFT) was applied to solve the problem. In this procedure, designers are required to set an optimum arrangement of sensors to achieve the best testability. But the search of the best test points combination is usually conducted by manual work. To simplify this blind and inefficient procedure, a test point optimization algorithm based on multi-signal flow model is proposed in this paper and is successfully applied in a CMG. First, the basic conception of modeling is introduced and the analysis of testability is converted to the calculation based on dependency matrix. Then the test points optimization problem is described and analyzed by an improved genetic algorithm. At last, the algorithm is examined by the CMG's A/D board subsystem. The result shows the algorithm can find the best solution with excellent efficiency.

关键词： test point optimization testability multi-signal flow genetic algorithm

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A Generalized Piecewise Quadratic Lyapunov Function Approach to Estimating the Domain of Attraction of a Saturated System

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IFAC-PapersOnLine 2015年第11 11期48卷 120-125页

作者： Li, Yuanlong Lin, Zongli Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing of Ministry of Education Shanghai200240 China Charles L. Brown Department of Electrical and Computer Engineering University of Virginia CharlottesvilleVA22904-4743 United States

This paper revisits the problem of estimating the domain of attraction of a saturated system with an algebraic loop. A piecewise quadratic Lyapunov function of an augmented state vector composing of the system state and the saturated input has been proposed for use in estimating the domain of attraction for a saturated system. Considering the relationship between the system states and the saturation function, we propose in this paper a generalized piecewise quadratic Lyapunov function, which results from adding a term that characterizes the regional sector condition of the saturated input to the piecewise quadratic Lypunov function. The matrix associated with the generalized piecewise quadratic Lyapunov function is not required to be positive definite, and thus a set of less conservative stability conditions are established, from which a larger estimate of the domain of attraction can be obtained. Simulation results indicate that the effectiveness and superiority of the proposed method. © 2015

关键词： Lyapunov functions Domain of attraction Input saturation Piece wise quadratic Lyapunov function Positive definite Saturated systems Saturation function Sector condition Stability condition

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Comparative analysis and exprimental results of advanced control strategies for vibration suppression in aircraft wings

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Journal of Physics: Conference Series 2017年第1期783卷

作者： Isabela R. Birs Silviu Folea Dana Copot Ovidiu Prodan Cristina-I. Muresan Department of Automation Technical University of Cluj-Napoca Memorandumului St. No. 28 Cluj-Napoca Romania Department of Electrical energy Systems and Automation Research group on Dynamical Systems and Control Ghent University Technologiepark 914 2nd floor 9052 Ghent Belgium Department of Civil Engineering Technical University of Cluj-Napoca Memorandumului St. No. 28 Cluj-Napoca Romania

The smart beam is widely used as a means of studying the dynamics and active vibration suppression possibilities in aircraft wings. The advantages obtained through this approach are numerous, among them being aircraft stability and manoeuvrability, turbulence immunity, passenger safety and reduced fatigue damage. The paper presents the tuning of two controllers: Linear Quadratic Regulator and Fractional Order Proportional Derivative controller. The active vibration control methods were tested on a smart beam, vibrations being mitigated through piezoelectric patches. The obtained experimental results are compared in terms of settling time and control effort, experimentally proving that both types of controllers can be successfully used to reduce oscillations. The analysis in this paper provides for a necessary premise regarding the tuning of a fractional order enhanced Linear Quadratic Regulator, by combining the advantages of both control strategies.

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Identification of FIR Systems with Quantized Inputs and Observations

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IFAC-PapersOnLine 2015年第28期48卷 674-679页

作者： Guo, Jin Wang, Le Yi Yin, George Zhao, Yanlong Zhang, Ji-Feng School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing100083 China Department of Electrical and Computer Engineering Wayne State University DetroitMI48202 United States Department of Mathematics Wayne State University DetroitMI48202 United States Key Laboratory of Systems and Control Institute of Systems Science Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing100190 China

This paper introduces identification algorithms for finite impulse response systems under quantized output observations and general quantized inputs. While asymptotically efficient algorithms for quantized identification under periodic inputs are available, their counterpart under general inputs has encountered technical difficulties and evaded satisfactory resolutions. Under quantized inputs, this paper resolves this issue with constructive solutions. A two-step algorithm is developed, which demonstrates desired convergence properties including strong convergence, mean-square convergence, convergence rates, asymptotic normality, and asymptotical efficiency in terms of the Cramér-Rao lower bound. Some essential conditions on input excitation are derived that ensure identifiability and convergence. It is shown that by a suitable selection of the algorithm's weighting matrix, the estimates become asymptotically efficient. The strong and mean-square convergence rates are explicitly obtained. Optimal input design is discussed. Numerical examples are included to illustrate the main results of this paper © 2015

关键词： FIR filters Efficiency Identification (control systems) Impulse response Asymptotic efficiency Asymptotically efficient Finite impulse response system Identification algorithms Input design Mean square convergences non periodic input quantization

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Localizing multiple odor sources with a mobile robot in time-varying airflow environments using Dempster-Shafer inference 34

Localizing multiple odor sources with a mobile robot in time...

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34th Chinese control Conference, CCC 2015

作者： Ji-Gong, Li Jie-Yong, Zhou Jing, Yang Jia, Liu Fan-Lin, Zeng Li, Yang School of Automation and Electrical Engineering Tianjin University of Technology and Education Tianjin China Tianjin Key Laboratory of Information Sensing and Intelligent Control Tianjin China School of Information Technology Engineering Tianjin University of Technology and Education Tianjin China

ISBN: (纸本)9789881563897

This paper addresses the problem of multiple odor sources localization (MOSL) using a mobile robot in a time-varying airflow environment, and provides a localization method which applies the Dempster-Shafer (D-S) theory to map the possible locations of several odor sources and then uses the map to plan a searching route online for the robot. In the proposed method, the robot carries out the D-S inference and iteratively updates a grid map in which each cell has two states (i.e., occupied by an odor source, and not occupied by odor source), using the successive measurements from a gas sensor and an anemometer when the robot follows the dynamic-planned searching route in the given work area. The searching route is planned online to maximize the decline of the uncertainties of the grid cells around the robot. The mapping of the odor sources and the planning of the searching route work side-by-side. Simulations are carried out and the results in a time-varying airflow environment show that the locations of the two odor sources can be estimated online with the D-S inference, and the time cost can be greatly reduced by following the dynamic-planned searching route compared with by following a predefined path shaped like rectangular wave to cover the given searching area. © 2015 Technical Committee on control Theory, Chinese Association of automation.

关键词： D-S inference mobile robot Multiple odor sources localization online estimating and searching

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Voltage Stability Analysis of Wind Power Integrated System Based on Flexible HVDC Technology

Voltage Stability Analysis of Wind Power Integrated System B...

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2015 International Industrial Informatics and Computer engineering Conference(IIICEC 2015)

作者： Tianze Dai School of Control and Computer Engineering Electrical Engineering and Automation North China Electric Power University

Regarding an isolated system in Huolinhe region as the object of study,in order to reduce the system voltage fluctuation and improve system voltage stability,the paper proposes that the wind farm uses the access way of flexible DC into *** Flexible transmission mode bases the DC voltage source inverter on the directional characteristics and realizes the decoupling of active and reactive power with pulse width modulation technology,which can be adjusted independently and continuously.

关键词： Wind power Voltage stability DC transmission

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ISS properties of sliding-mode controllers for systems with matched and unmatched disturbances

ISS properties of sliding-mode controllers for systems with ...

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European control Conference, ECC 2015

作者： Martinez, Andrea Aparicio Castanos, Fernando Fridman, Leonid Electrical Engineering PhD Program Faculty of Engineering Universidad Nacional Autónoma de México Mexico Departamento de Control Automático Cinvestav IPN Mexico Faculty of Engineering Universidad Nacional Autónoma de México Mexico

ISBN: (纸本)9783952426937

In this paper we present a controller that achieves global input-to-state stabilty for a linear system of arbitrary relative degree, subjected to matched and unmatched disturbances. This controller combines the properties of a discontinous term, and a linear one, enforcing a conventional sliding mode using only partial state information. A direct and simple way of choosing the gains for this controller is also provided. © 2015 EUCA.

关键词： controllers

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De-noising method of improved EEMD algorithm based on cloud similarity measurement

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Open automation and control Systems Journal 2015年第1期7卷 1518-1522页

作者： Han, Long Li, Chengwei School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China School of Electrical and Control Engineering Heilongjiang University of Science and Technology Harbin China

EEMD Algorithm is usually applied in noise reduction of rolling bearing signal because of its powerful ability in de-noising. But misjudgment in selecting sensitive IMF exists, it results in the incomplete processing of noise reduction. In order to solve this problem, this paper proposes an improved EEMD algorithm. This algorithm adopts Cloud Similarity Measurement in selecting the sensitive intrinsic mode function component which responses the fault feature. And the sensitive intrinsic mode function component is used to reconstruct signal. The simulation experiment shows that the improved EEMD algorithm has overcome the misjudgment of the original EEMD algorithm during selecting sensitive IMF, and it can do better in filtering the noise of signal. To apply the improved EEMD algorithm in de-noising of factually collected damage AE signal, the experiment results show that it is more effective in reducing the noise interference in Acoustic Emission Signal of rolling bearing. © Han and Li.

关键词： Functions

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RBF Adaptive Sliding control for Five-axis Flexible Satellite 34

RBF Adaptive Sliding Control for Five-axis Flexible Satellit...

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第三十四届中国控制会议

作者： MA Zheng WU Yunjie DONG Xiaomeng State Key Laboratory of Virtual Reality Technology and Systems Beihang University School of Automation Science and Electrical Engineering Beihang University Science and Technology on Aircraft Control Laboratory Qian Xuesen Laboratory of Space Technology CAST

ISBN: (纸本)9781467374439

With consideration of the flexible attachment effect, a robust sliding mode control method is proposed to realize RBF optimization of 3-DOF satellite with 2-DOF load. RBF neural network's approximation characteristic enables us to estimate the nonlinear function of satellite dynamics equation, furthermore, to adjust the sliding mode control law. Meanwhile, adaptive law is adopted to optimize the weights of neural network, so that satellite attitude and load attitude reach the expectation. Simulation results reveal that, this method far surpass traditional control method in rapidity, robustness and accuracy. Moreover, it's timeliness values much during practical application.

关键词： flexible attachment,five-axis satellite model,adaptive RBF neural network,sliding mode variable structure

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