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Full-Text Articles in Controls and Control Theory
A Practical Approach To Disturbance Decoupling Control, Qing Zheng, Zhongzhou Chen, Zhiqiang Gao
A Practical Approach To Disturbance Decoupling Control, Qing Zheng, Zhongzhou Chen, Zhiqiang Gao
Electrical and Computer Engineering Faculty Publications
In this paper, a unique dynamic disturbance decoupling control (DDC) strategy, based on the active disturbance rejection control (ADRC) framework, is proposed for square multivariable systems. With the proposed method, it is shown that a largely unknown square multivariable system is readily decoupled by actively estimating and rejecting the effects of both the internal plant dynamics and external disturbances. By requiring as little information on plant model as possible, the intention is to make the new method practical. The stability analysis shows that both the estimation error and the closed-loop tracking error are bounded and the error upper bounds …
From Linear To Nonlinear Control Means: A Practical Progression, Zhiqiang Gao
From Linear To Nonlinear Control Means: A Practical Progression, Zhiqiang Gao
Electrical and Computer Engineering Faculty Publications
With the rapid advance of digital control hardware, it is time to take the simple but effective proportional-integral-derivative (PID) control technology to the next level of performance and robustness. For this purpose, a nonlinear PID and active disturbance rejection framework are introduced in this paper. It complements the existing theory in that (1) it actively and systematically explores the use of nonlinear control mechanisms for better performance, even for linear plants; (2) it represents a control strategy that is rather independent of mathematical models of the plants, thus achieving inherent robustness and reducing design complexity. Stability analysis, as well as …