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6th IEEE Chinese Guidance, Navigation and control Conference, CGNCC 2014

作者： Zhang, Xiangxiang Jing, Yang Zhang, Zhao School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Beijing Institute of Control Engineering Beijing100190 China

ISBN: (纸本)9781479946990

With the rapid development of the Beidou system, it is important to research the acquisition of B1I signal. In order to acquire the MEO/IGSO satellites signal modulated with 1 kbps NH code in interference environment effectively and quickly, a signal acquisition scheme which is the combination of an improved half bits differential acquisition method and 3-points conic fitting method to get fine frequency is proposed. The experiment results show that the improved half bits differential acquisition method, compared with the traditional acquisition method, acquired Beidou B1I signal more successfully, especially for the weak signals, And 3-points conic fitting method provided fine carrier frequency which is accurate enough for the signal tracking. © 2014 IEEE.

关键词： Radio navigation

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Cut-Off solar charge controller as an alternative towards system efficiency optimization

Cut-Off solar charge controller as an alternative towards sy...

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2014 IEEE International Conference on Power and Energy, PECon 2014

作者： Sabry, Ahmad H. Almassri, Ahmed M. Wan Hasan, Wan Zuha B Mohd Radzi, Mohd Amran Bin Ab. Kader, Zainal Abidin Bin Shafie, Suhaidi Control and Automation Engineering University Putra Malaysia UPM Serdang Malaysia Electrical and Electronic Engineering Dep. Faculty of Engineering Universiti Putra Malaysia Malaysia

ISBN: (纸本)9781479972975

Based on the concept of optimizing the efficiency of the automated solar system in residential buildings application, this paper proposed a High efficiency solar Cut-Off charge controller as an alternative to the main solar charge controller in most conventional buildings solar system, the idea is to design an electronic circuit with low losses as a compared with the conventional charge controller to be a part of the integrated and automated building solar system, the design has an algorithm based on some environment parameters like sun Irradiance and weather temperature, this algorithm seems to be inversely calculated because its start from the value of full charge battery voltage. A Simulink Matlab simulator is attempted in the simulation phase of this research. The main difference between the method used in the proposed Cut-Off controller and other technique used in the past is that PV array output power is used directly through a bypass MOSFET to charge the battery bank when the voltage of the battery bank at lower level that its maximum while switching on another path when the batteries reaches its full charge value through another MOSFET to transfer this surplus power to what is called as an Auxiliary load, fans or auxiliary battery used for system ventilation or solar tracking to reduce the ambient temperature for the system components, so adding more improvements on system performance, this would reduce the complexity of the system on one hand and produce a competitive efficiency, low cost and can be easily modified on the other hand. © 2014 IEEE.

关键词： controllers

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Experimental Verification of a Multi-robot Distributed control Algorithm with Containment and Group Dispersion Behaviors: the Case of Dynamic Leaders

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IEEE/CAA Journal of Automatica Sinica 2014年第1期1卷 54-60页

作者： Hejin Zhang Zhiyun Zhao Ziyang Meng Zongli Lin Department of Automation and Key Laboratory for System Control and Information Processing of Ministry of Education Shanghai Jiao Tong University the Access Linnaeus Centre School of Electrical Engineering Royal Institute of Technology Charles L. Brown Department of Electrical and Computer Engineering University of Virginia

This paper studies the containment and group dispersion control for a multi-robot system in the presence of dynamic leaders. Each robot is represented by a doubleintegrator dynamic model and a distributed control algorithm is developed to drive the multi-robot system to follow a group of dynamic leaders with containment and group dispersion behaviors. The effectiveness of the algorithm is then verified on a multi-robot control platform.

关键词： Heuristic algorithms Mobile robots Robot kinematics Trajectory Dispersion Decentralized control

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Hovering control of a Nano Quadrotor Unmanned Aerial Vehicle Using Optical Flow 33

Hovering Control of a Nano Quadrotor Unmanned Aerial Vehicle...

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第三十三届中国控制会议

作者： XIAN Bin LIU Yang ZHANG Xu CAO Meihui Wang Fu The Institute of Robotics and Autonomous System the Tianjin Key Laboratory of Process Measurement and ControlSchool of Electrical Engineering and AutomationTianjin University

ISBN: (纸本)9781479947249

In this paper, a PD controller which uses optical flow to obtain position and velocity feedback is proposed for the autonomous hovering flight control of a nano quadrotor unmanned aerial vehicle(UAV). The nano quadrotor UAV has a mass less than 100 g and is comparatively much smaller than the micro vehicles utilized in previous research. Due to the limited size and payload ability, a wireless camera is employed as the onboard visual device to obtain the position and translational velocity of the UAV. Experiment results are included to demonstrate the good control performance of the proposed design.

关键词： Nano Quadrotor UAV,Optical Flow,Autonomous control

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On control design and tuning for first order plus time delay plants with significant uncertainties

On control design and tuning for first order plus time delay...

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American control Conference

作者： Lijun Wang Qing Li Chaonan Tong Yixin Yin Zhiqiang Gao Qinling Zheng Weicun Zhang School of Automation & Electrical Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of Advanced Control of Iron and Steel Process Ministry of Education Beijing 100083 China Center for Advanced Control Technologies Cleveland State University Cleveland OH 44115 USA

ISBN: (纸本)9781479917730

A novel active disturbance rejection control (ADRC) solution and a particular tuning method are presented for a class of time delay system (TDS) with uncertainty. First, the complicated process dynamics is modeled as a simple first order plus large time delay (FOPTD) plant, with the difference between the actual dynamics and its model treated as disturbances to be rejected. Then the reduced order linear extended state observer (RLESO) with input delay is proposed to estimate the time delay state and disturbance. It is shown how the time delay could be eliminated from the characteristic equation of the closed-loop system by manipulations of controller parameters. Secondly, the one parameter tuning (OPT) technique is developed where all controller parameters are made function of a single coefficient. In comparison with optimal proportional-integral-derivative (PID) controller and twice optimum controller (TOC), the simulation results show that the proposed method not only has better accuracy and faster response, but also ensures better robustness and adaptability against uncertain model parameters and external disturbances, especially for the plant with very large time delays.

关键词： tuning design control model parameters Process dynamics Characteristic equation one-parameter external disturbance FIRST ORDER controllers Closed loop systems

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Filtering of Takagi-Sugeno Fuzzy Switched System with Application to Sensor Fault Detection

Filtering of Takagi-Sugeno Fuzzy Switched System with Applic...

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IEEE Annual Conference on Decision and control

作者： Xiaojie Su Peng Shi Ligang Wu College of Automation Chongqing University Chongqing 400044 China School of Electrical and Electronic Engineering The University of Adelaide SA 5005 Australia Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin 150001 China

ISBN: (纸本)9781479978878

The filtering problem for T-S fuzzy switched stochastic system is investigated in this paper. The aim is to construct a fault detection technique for the T-S fuzzy switched system. Based on observer-based fault detection fuzzy filter as a residual generator, the proposed fault detection is formulated as a fuzzy filtering problem. Then, the fault detection filters are designed that guarantee the resulted error system to be mean-square exponential stable with a weighted system error performance. Finally, the corresponding solvability condition for the fault detection fuzzy filter is also established by the linearization procedure technique.

关键词： Defect detection Filtration Switched systems Fault detection filter Fuzzy inspection technique error system fuzzy filter T-S fuzzy model

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Dynamic Linear controller Design for a Class of High-Order Nonlinear Systems via State-Feedback

Dynamic Linear Controller Design for a Class of High-Order N...

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IEEE Annual Conference on Decision and control

作者： Wenting Zha Chunjiang Qian Junyong Zhai Shumin Fei Key Laboratory of Measurement and Control of CSE Ministry of Education School of Automation Southeast University Nanjing Jiangsu 210096 China Department of Electrical and Computer Engineering University of Texas at San Antonio San Antonio Texas 78249 USA

ISBN: (纸本)9781479978878

The objective of this paper is to address the linear state-feedback control problem for a family of high-order uncertain nonlinear systems. Based on the adding a power integrator technique, the authors recursively construct a linear controller with dynamic gains, which can be used to deal with the uncertain nonlinear terms and simplify the controller structure. Moreover, it is proved that the proposed control law can globally regulate system states to the origin and guarantee the boundedness of all the signals of the closed-loop system as well. Finally, a simulation example is presented with some comparison with the existing result so as to demonstrate the effectiveness of the proposed design scheme.

关键词： High-order nonlinear systems dynamic linear controller adding a power integrator linear controllers design scheme Uncertain nonlinear system control law State feedback higher-order controller design Closed loop systems state feedback control

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MRAC control with prior model knowledge for asymmetric damaged aircraft

Scientific World Journal

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Scientific World Journal 2015年第1期2015卷 247301页

作者： Xu, Xieyu Yang, Lingyu Zhang, Jing CNIGC Institution of Navigation and Control Chedaogou No. 10 Haidian District Beijing 100191 China Department of Automation Science and Electrical Engineering Beihang University Haidian District Beijing 100191 China

This paper develops a novel state-tracking multivariable model reference adaptive control (MRAC) technique utilizing prior knowledge of plant models to recover control performance of an asymmetric structural damaged aircraft. A modification of linear model representation is given. With prior knowledge on structural damage, a polytope linear parameter varying (LPV) model is derived to cover all concerned damage conditions. An MRAC method is developed for the polytope model, of which the stability and asymptotic error convergence are theoretically proved. The proposed technique reduces the number of parameters to be adapted and thus decreases computational cost and requires less input information. The method is validated by simulations on NASA generic transport model (GTM) with damage. © 2015 Xieyu Xu et al.

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Performance evaluation and structure optimization of an inner-outer electrical resistance tomography sensor

Performance evaluation and structure optimization of an inne...

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International Conference on Mechatronics and control, ICMC 2014

作者： Shangjie, Ren Chao, Tan Yanbin, Xu Feng, Dong Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin China

ISBN: (纸本)9781479925384

electrical resistance tomography is a useful visualization technique to imaging the conductivity distribution inside a closed pipeline from the boundary measurements. Due to its advantages of high speed, low cost and high safety, the technique has been successfully applied in the measurement of many industrial processes. However, since the mathematical model is highly non-linear and ill-posed, the spatial resolution of ERT is low, especially in the center of the objective domain. To overcome the problem, an inner-outer ERT sensor structure was proposed. The structure is consisted by the internal and external electrodes, and can provided more independent measurements for high resolution image reconstruction. To test the performance of the inner-outer sensor structure, six inner-outer ERT sensors are designed, and the influences of the size, number and distribution of the internal electrodes are discussed. After several numerical tests, the inner-outer ERT sensor is proved having the ability of enhancing the spatial resolution of ERT, especially in the area near the internal electrodes. © 2014 IEEE.

关键词： Image reconstruction

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Adaptive tracking control using partitioned RBFNN in permanent magnet spherical motor system

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Journal of Computational Information Systems 2014年第7期10卷 2711-2718页

作者： Guo, Xiwen Wang, Qunjing Li, Guoli Qian, Zhe Wen, Yan Zhao, Shuangshuang School of Electrical Engineering and Automation Anhui University Hefei 230601 China National Engineering Laboratory of Energy-Saving Motor and Control Technique Anhui University Hefei 230601 China Power Quality Engineering Research Center of China Ministry Anhui University Hefei 230601 China

Permanent magnet spherical motor (PMSM) has the advantageous features of high response, direct drive and compact structure, but the nonlinear friction, external disturbance and the change of system parameters reduce the dynamic performance of the system. To eliminate the influence of the uncertainties mentioned above, a robust neural network motion tracking control strategy is proposed in this paper. In particular, the radial basis function neural network (RBFNN) is chosen for function's partitioned approximation, while the robust item is used to compensate the external disturbance and the estimated error. The stability of the closed-loop system as well as the convergence is assured based on Lyapunov analysis. Simulation results show that this control strategy not only has a good continuous tracking performance, but also has a strong robustness to uncertainties. © 2014 Binary Information Press.

关键词： Robust control

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