Active disturbance rejection control for digital electric-hydraulic system

Author

Sun Li ; Dong Junyi ; Li Donghai ; Zhang Yuqiong

Author_Institution

Dept. of Thermal Eng., Tsinghua Univ., Beijing, China

fYear

2014

fDate

28-30 July 2014

Firstpage

3674

Lastpage

3679

Abstract

Digital electric-hydraulic system (DEH), which is nonlinear, time-varying and of parameter uncertainties, is the most widely used governing system of the mainstream steam turbine in China. In this paper, a compound control strategy using active disturbance rejection control (ADRC) and proportional control strategy is proposed for the DEH system. ADRC has simple structure, strong disturbance rejection ability and is independent on accurate mathematical model. When it is applied to DEH system, the unmodeled dynamics and parameter uncertainties in DEH can be estimated and actively compensated. Based on the industrial control requirements, the load control simulation is carried out. The results show the effectiveness and robustness of the proposed control strategy for the DEH system.

Keywords

active disturbance rejection control; electrohydraulic control equipment; hydraulic systems; load regulation; robust control; steam turbines; time-varying systems; uncertain systems; ADRC; China; DEH system; active disturbance rejection control; compound control strategy; digital electric-hydraulic system; industrial control requirements; load control simulation; nonlinear system; parameter uncertainties; proportional control strategy; steam turbine; time-varying system; Electronic mail; Load flow control; Mathematical model; Monte Carlo methods; Robustness; Sun; Uncertain systems; Robustness; active disturbance rejection control (ADRC); digital electric-hydraulic (DEH) system; load control;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (CCC), 2014 33rd Chinese

Conference_Location

Nanjing

Type

conf

DOI

10.1109/ChiCC.2014.6895550

Filename

6895550