Open AccessImproved disturbance rejection control for piezoelectric actuators based on combination of ESO and Q ‐filter
Author(s) -
Zhuoyun Nie,
Yijing Ma,
Ruijuan Liu,
Dongsheng Guo
Publication year - 2018
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2018.0909
Subject(s) - disturbance (geology) , control theory (sociology) , actuator , piezoelectricity , active disturbance rejection control , filter (signal processing) , control (management) , acoustics , computer science , engineering , physics , nonlinear system , artificial intelligence , electrical engineering , geology , paleontology , quantum mechanics , state observer
An improved disturbance rejection control based on the combination of an extended‐state observer (ESO) and Q ‐filter is presented for piezoelectric actuators. Analysis using the standard disturbance observer framework is performed to verify that the new method can improve the accuracy of disturbance estimation even under measurement noise. An advantage of the proposed method is that the bandwidth of the ESO can be reduced without the degradation of disturbance rejection performance. An experiment is performed to validate the effectiveness of the proposed method.