Composite nonlinear feedback with dynamic event‐triggered mechanism for control systems in the presence of saturation nonlinearity

2020 ◽  
Author(s):  
Zhiqiang Zuo ◽  
Haorui Cheng ◽  
Pengfei Xie ◽  
Yijing Wang ◽  
Hongchao Li
Keyword(s):  
Control Systems ◽  
Nonlinear Feedback ◽  
Composite Nonlinear Feedback ◽  
Saturation Nonlinearity ◽  
Dynamic Event ◽  
Event Triggered

L2-gain analysis for dynamic event-triggered networked control systems with packet losses and quantization

Automatica ◽  
2021 ◽  
Vol 129 ◽  
pp. 109587
Author(s):  
Chunyu Wu ◽  
Xudong Zhao ◽  
Weiguo Xia ◽  
Ji Liu ◽  
Tamer Başar
Keyword(s):  
Control Systems ◽  
Networked Control Systems ◽  
Networked Control ◽  
Packet Losses ◽  
Dynamic Event ◽  
Event Triggered ◽  
L2 Gain

Event-triggered composite nonlinear control for saturated systems with measurement feedback

2019 ◽  
Vol 41 (14) ◽  
pp. 3943-3951 ◽  
Author(s):  
Zhiqiang Zuo ◽  
Haorui Cheng ◽  
Yijing Wang ◽  
Hongchao Li
Keyword(s):  
Nonlinear Control ◽  
Design Method ◽  
Time Interval ◽  
Nonlinear Feedback ◽  
Composite Nonlinear Feedback ◽  
Fighter Aircraft ◽  
Event Triggering ◽  
Measurement Feedback ◽  
Control Part ◽  
Event Triggered

The composite nonlinear feedback (CNF) control problem with event-triggered strategy for saturated systems with measurement feedback is considered in this paper. Both the full-order measurement and the reduced-order one are investigated to ensure the satisfactory performance of the closed-loop saturated systems under the proposed event-triggered mechanism. Generally speaking, the CNF control is divided into the linear control part and the nonlinear control part, which are designed separately. The purpose of the former is to shorten the rise time, while the latter aims at reducing the overshoot caused by the former. In this paper, a co-design method of linear and nonlinear control parts is proposed such that the control output tracks the reference input asymptotically with a good transient performance. Moreover, the parameter of CNF is applied to the construction of event-triggered mechanism which can efficiently reduce the communication burden. In order to avoid Zeno behavior, the minimum event-triggering time interval is explicitly formulated. Finally, an example of fighter aircraft is given for illustration.

Enhanced Composite Nonlinear Control Technique using Adaptive Control for Nonlinear Delayed Systems

2020 ◽  
Vol 13 (3) ◽  
pp. 396-404
Author(s):  
Sonal Singh ◽  
Shubhi Purwar
Keyword(s):  
Adaptive Control ◽  
Actuator Saturation ◽  
Input Saturation ◽  
Chemical Reactor ◽  
Control Technique ◽  
Control Law ◽  
Nonlinear Feedback ◽  
Composite Nonlinear Feedback ◽  
Delayed Systems ◽  
Analysis Of Stability

Background and Introduction: The proposed control law is designed to provide fast reference tracking with minimal overshoot and to minimize the effect of unknown nonlinearities and external disturbances. Methods: In this work, an enhanced composite nonlinear feedback technique using adaptive control is developed for a nonlinear delayed system subjected to input saturation and exogenous disturbances. It ensures that the plant response is not affected by adverse effect of actuator saturation, unknown time delay and unknown nonlinearities/ disturbances. The analysis of stability is done by Lyapunov-Krasovskii functional that guarantees asymptotical stability. Results: The proposed control law is validated by its implementation on exothermic chemical reactor. MATLAB figures are provided to compare the results. Conclusion: The simulation results of the proposed controller are compared with the conventional composite nonlinear feedback control which illustrates the efficiency of the proposed controller.

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