ℋ2 optimal output feedback control for a general discrete-time system

2014 ◽  
Author(s):  
Sebastian Florin Tudor ◽  
Cristian Oara
Keyword(s):  
Feedback Control ◽  
Discrete Time ◽  
Output Feedback ◽  
Output Feedback Control ◽  
Discrete Time System ◽  
Time System ◽  
Optimal Output

Event-based optimal output-feedback control of nonlinear discrete-time systems

2020 ◽  
Vol 540 ◽  
pp. 414-434
Author(s):  
Wenqi Xu ◽  
Xiaoping Liu ◽  
Huanqing Wang ◽  
Yucheng Zhou
Keyword(s):  
Feedback Control ◽  
Discrete Time ◽  
Output Feedback ◽  
Output Feedback Control ◽  
Optimal Output ◽  
Discrete Time Systems ◽  
Event Based ◽  
Time Systems

scholarly journals Output Feedback Recursive Dynamic Surface Control with Antiwindup Compensation

Complexity ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Guofa Sun ◽  
Hui Du ◽  
Gang Wang ◽  
Hanbo Yu
Keyword(s):  
Discrete Time ◽  
Output Feedback ◽  
Actuator Saturation ◽  
Input Saturation ◽  
Output Feedback Control ◽  
Dynamic Surface Control ◽  
Discrete Time System ◽  
Time System ◽  
Dynamic Surface ◽  
Surface Control

Actuator saturation phenomenon often exists in the actual control system, which could destroy the closed-loop performance of the system and even lead to unstable behavior. Our main contribution is to provide an antiwindup recursive dynamic surface control (RDSC) for a discrete-time system with an unknown state and actuator saturation. The fuzzy compensator is added to perform as an active disturbance rejection term in the feedforward path to avoid windup caused by input saturation. To construct output feedback control, the system is transformed into the form of pure-feedback and an improved HOSM observer is designed to carry out future output prediction. Based on which RDSC is synthesized, only one fuzzy logic system (FLS) is used and the controller singularity is completely avoided. In addition, the simulation and numeral examples using a continuous stirred tank reactors (CSTRs) system with actuator saturation are provided and the results show that the strategy owns good robustness and effectively compensates for the disturbance caused by actuator saturation in the presence of a discrete-time system with an unmeasurable state.

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