Robust control of refrigeration system based on disturbance observer

2019 2nd International Conference on Advanced Materials, Intelligent Manufacturing and Automation

Shang, Yujia^1 ; Liu, Xiaojing^1 ; Lu, Tielin^1

Instrumentation Technology and Economy Institute, Beijing

100055, China^1

关键词: Comparison result;    Disturbance observer;    Integral nonlinearity;    Model uncertainties;    Nonlinear disturbance observer;    Parameter perturbation;    Refrigeration system;    Stable operation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/569/4/042012/pdf
DOI  :  10.1088/1757-899X/569/4/042012

来源: IOP

【 摘 要 】

This paper presents a robust control algorithm combining the disturbance observer to compensate the serious parameter perturbation and model uncertainty in the refrigeration system. The nonlinear disturbance observer is designed to estimate the composite disturbance value. Based on the 5th-order simplified model of the refrigeration system, the sliding mode control method is designed for the evaporator and the condenser respectively to compensate the disturbance. Comparison result with the integral nonlinearity method demonstrates the superior capability of the proposed method on disturbance rejection, which can effectively guarantee the efficient and stable operation of refrigeration system.