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- Title
Stability and performance comparison analysis for linear active disturbance rejection control–based system.
- Authors
Song, Jia; Su, Jiangcheng; Hu, Yunlong; Zhao, Mingfei; Gao, Ke
- Abstract
This paper investigates the stability and performance of the linear active disturbance rejection control (LADRC)–based system with uncertainties and external disturbance via transfer functions and a frequency-domain view. The performance of LADRC is compared with the state-observer-based state feedback control (SOSFC) and state feedback control (SFC). First, the transfer functions and the error transfer functions for LADRC, SOSFC, and SFC are studied using the state-space method. It is proven that the LADRC-, SOSFC-, and SFC-based closed-loop systems have the same transfer function from the reference input to the output and achieve the same control effects for the nominal system. Then, it is proven for the first time that the LADRC has a better anti-interference ability than the SOSFC and SFC. Besides, the asymptotic stability condition of LADRC-based closed-loop system considering large parameter perturbations is given first. Moreover, the sensitivity analysis of the closed-loop system is carried out. The results show that the LADRC has stronger robustness under parameter perturbations. According to the results, we conclude that the LADRC is of great disturbance rejection ability and strong robustness.
- Subjects
STATE feedback (Feedback control systems); LINEAR statistical models; STATE-space methods; TRANSFER functions; ERROR functions
- Publication
Transactions of the Institute of Measurement & Control, 2022, Vol 44, Issue 10, p2037
- ISSN
0142-3312
- Publication type
Article
- DOI
10.1177/01423312211065918