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Chinese Physics B 2022年第10期31卷 341-351页

作者：张红伟程然丁大为 School of Electronics and Information Engineering Anhui UniversityHefei 230601China

The finite-time synchronization of fractional-order multi-weighted complex networks(FMCNs)with uncertain parameters and external disturbances is studied.Firstly,based on fractional calculus characteristics and Lyapunov stability theory,quantized controllers are designed to guarantee that FMCNs can achieve synchronization in a limited time with and without coupling delay,respectively.Then,appropriate parameter update laws are obtained to identify the uncertain parameters in FMCNs.Finally,numerical simulation examples are given to validate the correctness of the theoretical results.

关键词： fractional-order complex networks uncertain parameter finite-time synchronization quantized control

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Quasi-synchronization of fractional-order complex networks with random coupling via quantized control

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Chinese Physics B 2023年第11期32卷 355-363页

作者：张红伟程然丁大为 School of Electronics and Information Engineering Anhui UniversityHefei 230601China

We investigate the quasi-synchronization of fractional-order complex networks(FCNs) with random coupling via quantized control. Firstly, based on the logarithmic quantizer theory and the Lyapunov stability theory, a new quantized feedback controller, which can make all nodes of complex networks quasi-synchronization and eliminate the disturbance of random coupling in the system state, is designed under non-delay conditions. Secondly, we extend the theoretical results under non-delay conditions to time-varying delay conditions and design another form of quantization feedback controller to ensure that the network achieves quasi-synchronization. Furthermore, the error bound of quasi-synchronization is obtained.Finally, we verify the accuracy of our results using two numerical simulation examples.

关键词： complex network fractional-order random coupling time-varying delay quasi-synchronization quantized control

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ESO based Spacecraft quantized Attitude control with Disturbance

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ESO based Spacecraft Quantized Attitude Control with Disturb...

Further results on quantized stabilization of nonlinear cascaded systems with dynamic uncertainties

第36届中国控制会议

作者： Qing Wang Ligang Gong Chaoyang Dong Yanze Hou School of Automation Science and Electrical Engineering Beihang University School of Aeronautic Science and Engineering Beihang University Institute of Manned Space System Engineering CAST

ISBN: (纸本)9781538629185

quantized control of spacecraft attitude under disturbance is considered in this study,without measurements of angular velocity.The attitude motion model adopted is described in terms of unit quaternion.Firstly,an extended state observer（ESO） is designed to estimate angular velocity and total disturbance simultaneously.The designed ESO can guarantee the norm constraint of unit quaternion is satisfied.The convergence of estimation error of ESO is proved within Lyapunov function framework.Secondly,the quantized control torque is designed based on the output of ESO,and rigorous proof of uniformly ultimately boundededness of the closed system is given considering the error bound property between quantized and ideal control torque.Finally,simulations results demonstrate the effectiveness of the proposed ESO and quantized control design scheme.

关键词： quantized control spacecraft attitude motion extended state observer output feedback

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Science China(Information Sciences) 2016年第7期59卷 202-213页

作者： Tengfei LIU Zhong-Ping JIANG State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Department of Electrical and Computer Engineering Polytechnic School of Engineering New York University

This article studies the quantized partial-state feedback stabilization of a class of nonlinear cascaded systems with dynamic uncertainties. Under the assumption that the dynamic uncertainties are input-to-state practically stable, a novel recursive design method is developed for quantized stabilization by taking into account the influence of quantization and using the small-gain theorem. When the dynamic uncertainty is input-to-state stable, asymptotic stabilization can be achieved with the proposed quantized control law.

关键词： quantized control nonlinear systems dynamic uncertainties asymptotic stabilization

Integral sliding mode control design for nonlinear stochastic systems under imperfect quantization

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Science China(Information Sciences) 2017年第12期60卷 71-81页

作者： Yabin GAO Wensheng LUO Jianxing LIU Ligang WU Research Institute of Intelligent control and Systems Harbin Institute of Technology

This paper presents a sliding mode control(SMC) scheme via output-feedback approach for It?o stochastic systems under a quantization mechanism. The quantization process is formulated with the imperfection that random packet loss occurs at the logarithmic quantizer. A Luenberger observer is designed, based on the packet loss rate and the imperfect quantized measurement. A novel SMC law is synthesized by utilization of an integral sliding surface. The stochastic stability of the resulting closed-loop system is analyzed in terms of Lyapunov stability, and a set of solvable matrix inequalities are established for practical application requirements. Finally, a simulation example is employed for the illustration of the effectiveness of the presented control scheme.

关键词： stochastic systems quantized control sliding mode control observer design packet loss

Fault-tolerant control with mixed aerodynamic surfaces and RCS jets for hypersonic reentry vehicles

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Chinese Journal of Aeronautics 2017年第2期30卷 780-795页

作者： He Jingjing Qi Ruiyun Jiang Bin Zhai Rongyu College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 211106 China

This paper proposes a fault-tolerant strategy for hypersonic reentry vehicles with mixed aerodynamic surfaces and reaction control systems（RCS） under external disturbances and subject to actuator faults.Aerodynamic surfaces are treated as the primary actuator in normal situations,and they are driven by a continuous quadratic programming（QP） allocator to generate torque commanded by a nonlinear adaptive feedback control law.When aerodynamic surfaces encounter faults,they may not be able to provide sufficient torque as commanded,and RCS jets are activated to augment the aerodynamic surfaces to compensate for insufficient torque.Partial loss of effectiveness and stuck faults are considered in this paper,and observers are designed to detect and identify the faults.Based on the fault identification results,an RCS control allocator using integer linear programming（ILP） techniques is designed to determine the optimal combination of activated RCS jets.By treating the RCS control allocator as a quantization element,closed-loop stability with both continuous and quantized inputs is analyzed.Simulation results verify the effectiveness of the proposed method.

关键词： control allocation Fault-tolerant control Hypersonic vehicles quantized control Reaction control system（RCS）

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quantized Feedback Stabilization of Nonlinear Cascaded Systems with Dynamic Uncertainties

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Quantized Feedback Stabilization of Nonlinear Cascaded Syste...

Finite-Horizon H∞ control for Discrete Time-Varying Nonlinear Systems Under Earliest Deadline First Schedule

第26届中国控制与决策会议

作者： Tengfei Liu Zhong-Ping Jiang State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Polytechnic School of Engineering New York University

This paper studies the quantized partial-state feedback stabilization of a class of nonlinear cascaded systems with dynamic uncertainties. Under the assumption that the dynamic uncertainties are input-to-state practically stable, we develop a novel recursive design method for quantized stabilization by taking into account the influence of quantization and using the small-gain theorem. When the dynamic uncertainty is input-to-state stable, asymptotic stabilization can be achieved with the proposed quantized control law.

关键词： quantized control nonlinear systems dynamic uncertainties asymptotic stabilization.

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Finite-Horizon H∞ Control for Discrete Time-Varying Nonline...