scholarly journals A Robust Control Strategy for Linear Systems Having Uncertainties

1992 ◽  
Vol 28 (3) ◽  
pp. 351-357 ◽  
Author(s):  
Noriaki SAKAMOTO ◽  
Masami MASUBUCHI ◽  
Seiichi KAWATA
Keyword(s):  
Robust Control ◽  
Linear Systems ◽  
Control Strategy

A Hybrid Adaptive and Robust Control Strategy for a Class of Linear Systems

2003 ◽  
Author(s):  
Yisheng Zhang ◽  
Andrew G. Alleyne
Keyword(s):  
Robust Control ◽  
Linear Systems ◽  
Control Strategy ◽  
High Performance ◽  
Dwell Time ◽  
Hybrid Control ◽  
Adaptive Controller ◽  
Robust Controller ◽  
Plant Model ◽  
System Information

This paper presents a hybrid control strategy to avoid the basic trade-off between performance and robustness for individual controllers. The hybrid control strategy utilizes a robust controller for guaranteed robustness and adequate performance when the plant model is not well known and/or in the presence of significant disturbances, and employs an adaptive controller for high performance after sufficient system information has been collected. Based on traditional dwell-time approaches, a coordinated dwell-time approach is developed and incorporated into the hybrid control strategy, which guarantees the global stability of the hybrid system for a class of linear systems, as well as combine the benefits of robust control and adaptive control.

Control of Uncertain LTI Systems Based on an Uncertainty and Disturbance Estimator

2004 ◽  
Vol 126 (4) ◽  
pp. 905-910 ◽  
Author(s):  
Qing-Chang Zhong ◽  
David Rees
Keyword(s):  
Time Delay ◽  
Robust Control ◽  
Robust Stability ◽  
Control Strategy ◽  
Time Delay Control ◽  
Delay Control ◽  
Uncertainty And Disturbance Estimator ◽  
Derivatives Of ◽  
Siso Systems ◽  
Disturbance Estimator

This paper proposes a robust control strategy for uncertain LTI systems. The strategy is based on an uncertainty and disturbance estimator (UDE). It brings similar performance as the time-delay control (TDC). The advantages over TDC are: (i) no delay is introduced into the system; (ii) there are no oscillations in the control signal; and (iii) there is no need of measuring the derivatives of the state vector. The robust stability of LTI-SISO systems is analyzed, and simulations are given to show the effectiveness of the UDE-based control with a comparison made with TDC.

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