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Anti-windup-based Dynamic controller Synthesis for Lipschitz systems under Actuator Saturation

IEEE/CAA Journal of Automatica Sinica 2015年第4期2卷 358-365页

作者： Naizhou Wang Hailong Pei Yong Tang Key Laboratory of Autonomous Systems and Networked Control Ministry of EducationSouth China University of Technology Key Laboratory of Surface Functional Structure Manufacturing of Guangdong Higher Education Institutes School of Mechanical and Automotive EngineeringSouth China University of Technology

This paper presents a new method for simultaneous synthesis of dynamic controller and static anti-windup compensator for saturated Lipschitz systems. Thanks to the reformulated Lipschitz property, the Lipschitz systems can be transformed into LPV (linear parameter-varying) systems whose system matrices are affine in a parameter matrix. Based on the modified sector condition dealing with saturation nonlinearity, the design of a nonlinear anti-windup-based controller leads to the solvability of a set of bilinear matrix inequalities (BMI) on the vertices of a bounded convex set which can be solved by the so-called iterative linear matrix inequality (ILMI) algorithm. A numerical example is presented to illustrate the effectiveness of the proposed method. © 2014 Chinese Association of Automation.

关键词： controllers Iterative methods Linear algebra Matrix algebra Numerical methods Set theory Synthesis (chemical)

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Sigmoid function array based ZG control for bounded input, energy saving and output tracking of time-invariant linear system

Sigmoid function array based ZG control for bounded input, e...

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World Congress on Intelligent control and Automation (WCICA)

作者： Yunong Zhang Jinjin Wang Deyang Zhang Binbin Qiu Yinyan Zhang Ministry of Education Key Laboratory of Autonomous Systems and Networked Control Guangzhou China SYSUCMU Shunde International Joint Research Institute Foshan China School of Electronics and Information Technology Sun Yat-sen University (SYSU) Guangzhou China

ISBN: (纸本)9781467384155

The Zhang-gradient (ZG) method has been proved to be powerful for control problems solving. In view of the boundedness and safety of practical actuators through limiting the input, the sigmoid function array (SFA) based ZG (SFABZG) controller, designed by the combination of the SFA and the ZG method, is proposed and investigated for output tracking of the time-invariant linear (TIL) system in this paper. Simulation results substantiate the efficacy and superiority of the proposed novel controller for output tracking of the TIL system with the input bounded and energy saved.

关键词： Trajectory Simulation Actuators Process control Steady-state Safety

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A dynamic co-evolution compact genetic algorithm for E/T problem

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IFAC-PapersOnLine 2015年第28期48卷 1439-1443页

作者： Han, Zhonghua Zhu, Yihang Lin, Shuo Faculty of Information and Control Engineering Shenyang Jianzhu University Department of Digital Factory Shenyang Institute of Automation Key Laboratory of networked control system Shenyang China Faculty of Information and Control Engineering Shenyang Jianzhu University Shenyang China

In this paper, a dynamic co-evolution compact genetic algorithm (DCCGA) is proposed for flexible flow shop scheduling problem (FFSP) to minimize the total earliness and tardiness (E/T) penalties. In this new algorithm, a dynamic co-evolution mechanism containing two probabilistic models and a best individual inheritance strategy are integrated into the compact genetic algorithm (CGA). For improving the stability of the evolutionary trend in the evolution processes, the diversity of evolution trend and the convergence speed. Lastly, the experimental results show that, DCCGA outperforms CGA by 11.74% on the problem we study. © 2015

关键词： Genetic algorithms Machine shop practice Co evolution Compact genetic algorithm Earliness tardiness Flexible flow shop Probabilistic models

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Population projection of the Indian subcontinent using TP-aided WASD neuronet

Population projection of the Indian subcontinent using TP-ai...

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International Conference on Fuzzy systems and Knowledge Discovery (FSKD)

作者： Yunong Zhang Wan Li Liangyu He Junqiao Qiu Hongzhou Tan School of Data and Computer Science Sun Yat-sen University (SYSU) Guangzhou China Ministry of Education Key Laboratory of Autonomous Systems and Networked Control Guangzhou China SYSU-CMU Shunde International Joint Research Institute Foshan China

ISBN: (纸本)9781509040940

The population projection of the Indian subcontinent, which is closely related to the future development of this region and even the whole world, has catched great attention among sociologists as well as scientists. However, most of the former researches are just based on fertility, mortality or other individual quantifiable factors by using some traditional statistical models and thus may lack all-sidedness in their results. The historical population data are the comprehensive reflection of population development under the influence of all factors. Based on the historical population data over 2000 years, a feedforward neuronet equipped with the weights-and-structure-determination (WASD) algorithm aided by twice-pruning (TP) technique is constructed. Besides, by introducing the cubic spline and error evaluation methods, the neuronet shows great performance in the population projection. Due to the marvelous learning and generalization abilities of the presented TP-aided WASD neuronet, we successfully draw up the population projection for the Indian subcontinent.

关键词： Sociology Statistics Splines (mathematics) Neurons Biological system modeling Feedforward neural networks Computational modeling

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GZ-type complex dynamic system solving online for time-varying complex matrix inverse

GZ-type complex dynamic system solving online for time-varyi...

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International Conference on Information and Automation (ICIA)

作者： Deyang Zhang Penghao He Nanhao Wang Bolin Liao Yunong Zhang Ministry of Education Key Laboratory of Autonomous Systems and Networked Control Guangzhou China SYSU-CMU Shunde International Joint Research Institute Foshan China School of Data and Computer Science Sun Yat-sen University (SYSU) Guangzhou China

ISBN: (纸本)9781509041039

A novel complex dynamic system, termed GZ-type (gradient-Zhang type) complex dynamic system, is proposed and investigated for solving online the time-varying complex matrix inverse problem, which is based on the ingenious combination of the conventional gradient dynamic system and the recently-proposed Zhang dynamic system. Theoretical results and simulation results both show the efficacy of the proposed complex model for time-varying complex matrix inversion.

关键词： Convergence Time-varying systems Mathematical model Recurrent neural networks Inverse problems Computational modeling

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Link from ZD control to pascal's triangle illustrated via multiple-integrator systems

Link from ZD control to pascal's triangle illustrated via mu...

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International Conference on Fuzzy systems and Knowledge Discovery (FSKD)

作者： Yunong Zhang Huinan Xiao Dechao Chen Sitong Ding Pei Chen School of Information Science and Technology Sun Yat-sen University (SYSU) Guangzhou China Ministry of Education Key Laboratory of Autonomous Systems and Networked Control Guangzhou China SYSU-CMU Shunde International Joint Research Institute Foshan China

ISBN: (纸本)9781509040940

This paper researches the tracking-control problem of multiple-integrator (MI) systems via Zhang dynamics (ZD), which is a powerful class of dynamics to solve online time-varying problems. Based on design procedures of the so-called ZD controllers for five low-order integrator systems, the general formula of the ZD controller for the nth-order integrator system is elaborately given, and theoretical analyses are conducted to substantiate the excellent exponential convergence performance of the tracking controllers of the MI systems. In addition, the link from ZD control to Pascal's triangle (PT) found in this paper contributes to a quick and proper acquisition of the mathematical expression of the ZD controller.

关键词： Convergence Trajectory Fuzzy systems Knowledge discovery Information science Sun

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Simple effective Zhang-dynamics stabilization control of the 4th-order hyper-chaotic Lu system with one input

Simple effective Zhang-dynamics stabilization control of the...

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International Conference on Fuzzy systems and Knowledge Discovery (FSKD)

作者： Yunong Zhang Tianjian Qiao Deyang Zhang Hongzhou Tan Dong Liang School of Information Science and Technology Sun Yat-sen University (SYSU) Guangzhou China Ministry of Education Key Laboratory of Autonomous Systems and Networked Control Guangzhou China SYSU-CMU Shunde International Joint Research Institute Foshan China

This paper aims at achieving the stabilization control of hyper-chaotic Lu system with only one control input. By employing Zhang dynamics (ZD) method, which is a simple and effective method for designing control input, the expression of the desired controller is thus obtained. This easy-to-design controller, synthesized by following specific steps of ZD design method, is able to stabilize the 4th-order hyper-chaotic Lu system to the zero equilibrium steadily. Simple engineering-type theoretical analysis is given. In addition, simulations are conducted to testify the efficacy of the presented ZD controller in stabilizing the hyper-chaotic Lu system.

关键词： Trajectory Chaotic communication Power system dynamics Design methodology Convergence

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ZG tracking controller of z2g1 type for fractional power system

ZG tracking controller of z2g1 type for fractional power sys...

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International Conference on Information and Automation (ICIA)

作者： Yunong Zhang Fangzheng Lai Liangyu He Wan Li Jinjin Wang Ministry of Education Key Laboratory of Autonomous Systems and Networked Control Guangzhou China SYSU-CMU Shunde International Joint Research Institute Foshan China School of Data and Computer Science Sun Yat-sen University (SYSU) Guangzhou China

ISBN: (纸本)9781509041039

The output tracking control problem of fractional power system is investigated in this paper. By combining Zhang dynamics (ZD) method and gradient dynamics (GD) method, i.e., the so-called ZG method, a tracking controller of z2g1 type is proposed for fractional power system. The design procedure is illuminated through a specific fractional power system. Besides, the method can be extended to the more general high-order nonlinear system of fractional power. Finally, four examples are included to show the feasibility and effectiveness of ZG method.

关键词： Trajectory Power system stability Nonlinear dynamical systems Power system dynamics

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Optimal parameter value of Zhang equivalence for MVN redundancy resolution at velocity and acceleration levels

Optimal parameter value of Zhang equivalence for MVN redunda...

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International Conference on Fuzzy systems and Knowledge Discovery (FSKD)

作者： Yunong Zhang Xiaogang Yan Yinyan Zhang Dechao Chen Hongzhou Tan School of Information Science and Technology Sun Yat-sen University (SYSU) Guangzhou China Ministry of Education Key Laboratory of Autonomous Systems and Networked Control Guangzhou China SYSU-CMU Shunde International Joint Research Institute Foshan China

The equivalent relationship of two general scheme formulations at joint velocity and joint acceleration levels is established in this paper for robotic redundancy resolution, i.e., the so-called Zhang equivalence (ZE). As one representative case, ZE of the minimum velocity norm (MVN) type (i.e., MVN-type ZE) is further investigated for redundancy resolution. Moreover, computer simulations together with illustrative numerical experiments based on the widely-used robot manipulator PUMA560 show the phenomenon that an optimal equivalence value of the equivalent parameter exists within effective range from two different perspectives of equivalence; and then reveal the optimal value of the equivalent parameter in two situations from such perspectives.

关键词： Redundancy Manipulators Acceleration Kinematics Computer simulation Computers

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Command Filtered backstepping-based Flight control of Unmanned Helicopters with Disturbance Observers 34

Command Filtered backstepping-based Flight Control of Unmann...

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第三十四届中国控制会议

作者： HE Yuebang PEI Hailong ZHOU Hongbo School of Information Engineering Wuyi University Key Laboratory of Autonomous Systems and Networked Control Ministry of Education South China University of Technology Hunan Institute of Science and Technology

ISBN: (纸本)9781467374439

A Command filtered backstepping control augmented with disturbance observer(CFBC+DO) is presented to deal with the problem of robust trajectory tracking for unmanned helicopters. The main work relies on the way to reduce the control calculation works and compensate the disturbances acting on the helicopter, which are the main reason of causing the tracking errors. Firstly, a nonlinear DO is presented to estimate the lumped disturbances which are composed of external disturbances and neglected model uncertainties. Then a CFBC is designed for the helicopter's trajectory tracking. Since the CFBC uses a command filter to calculate the derivatives of the virtual control signal, instead of using the analytical differentiation, it significantly simplifies the backstepping implementation. Furthermore, by integrating the estimated disturbances into CFBC, the global exponential stability of the compensated tracking errors are proved by using Lyapunov theory. At last, simulation results illustrate the efficiency of the proposed method.

关键词： Command Filtered Backstepping,Disturbance Observer,Trajectory Tracking,Unmanned Helicopter,Lyapunov Theory

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