控制理论与应用2023，Vol.40Issue(11)：1965-1971,7.DOI:10.7641/CTA.2022.20462
基于有限时间扰动观测器的水厂加矾系统二阶滑模控制
Second-order sliding mode control based on finite-time disturbance observer for alum dosing system of water plant
摘要
Abstract
The flocculation and sedimentation process of water plant has the characteristics of strong nonlinearity,uncertainty and time-varying parameters,and disturbances of sudden changes in raw water quality and water flow are easy to adversely affect the flocculation and sedimentation process.This paper proposes a control design method of second-order sliding mode based on the finite-time disturbance observer for alum dosing system.First,the feedback control of alum dosing system is designed by second-order sliding mode control method with non-smooth terms.Then,a finite-time disturbance observer is designed to estimate disturbances of sudden changes in raw water quality and water flow,as well as model mismatch caused by strong nonlinearity,uncertainty,and time-varying parameters in the flocculation and sedimentation process.The estimation result is combined with feedback control as feedforward compensation.Finally,the theoretical analysis proves the stability of second-order sliding mode control method based on the finite-time disturbance observer.The simulation results show that the composite control method proposed in this paper effectively improves the robustness and anti-disturbance performance of alum dosing system.关键词
加矾控制/有限时间扰动观测器/二阶滑模控制/抗扰动Key words
alum dosing control/finite-time disturbance observer/second-order sliding mode control/anti-disturbance引用本文复制引用
王冬生,张鹏,孙锦昊,郭若寒,蒋国平..基于有限时间扰动观测器的水厂加矾系统二阶滑模控制[J].控制理论与应用,2023,40(11):1965-1971,7.基金项目
国家自然科学基金项目(52170001)资助.Supported by the National Natural Science Foundation of China(52170001). （52170001）
