Frequency characteristics of a phase optimised active disturbance rejection control

被引：3

作者：

Wei, Wei ^{[1
,2
]}

Xia, Pengfei ^{[2
]}

Chen, Nan ^{[2
]}

Zuo, Min ^{[2
]}

机构：

[1] Beijing Univ Posts & Telecommun, Dept Mech & Elect Engn, Beijing 100876, Peoples R China

[2] Beijing Technol & Business Univ, Sch Comp & Informat Engn, Beijing 100048, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MODELLING IDENTIFICATION AND CONTROL | 2020年 / 36卷 / 03期

基金：

中国国家自然科学基金;

关键词：

linear extended state observer; linear active disturbance rejection control; phase optimisation; phase optimised extended state observer; phase optimised active disturbance rejection control; frequency response; estimation phase;

D O I：

10.1504/IJMIC.2020.116916

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A linear extended state observer (LESO) can just estimate constant disturbances with no steady-state error. To estimate time-varying disturbances more actively and accurately, a phase optimisation law (POL) is proposed. Based on the POL, both a phase optimised extended state observer (POESO) and a phase optimised active disturbance rejection control (POADRC) are proposed. Estimation errors, estimation phases, and frequency response have been analysed and compared. The estimation phase of a POESO always leads the one of a LESO, and a POESO estimates slope disturbances with no steady-state error. Transfer functions of tracking, total disturbance and noise are also obtained. Ability of the POADRC and the linear active disturbance rejection control (LADRC) to cancel out the total disturbance or suppress noise, and their stable regions are also analysed and compared. Both frequency analyses and numerical results show that the POADRC estimates the time-varying disturbances and improve the closed-loop performance more effectively.

引用

页码：222 / 232

页数：11

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