摘要
Abstract
Due to the significant nonlinear problems and parameter uncertainties faced by complex electro-hydraulic servo systems,as well as parameter drift caused by external load fluctuations and temperature changes,the contradiction between system complexity and control performance requirements was exacerbated.Therefore,this article takes the wind power hydraulic variable pitch system as the research object,based on the sliding mode variable structure control(SMC)theory,proposes to design a sliding mode variable structure controller through pole placement method,aiming to eliminate the influence of system parameter uncertainty on control performance.At the same time,adopting jitter elimination method of index convergence rate to alleviate system shaking and vibration phenomenon.To construct a more accurate mathematical model of the hydraulic system and improve the performance of the entire control system,a hydraulic servo system model was built in AMEsim software,and a sliding mode controller was designed using the S-function in Matlab/Simulink.The model was validated through joint simulation using AMEsim and Matlab.The simulation results show that the control strategy not only meets the requirements of pitch angle tracking accuracy and pitch system stability,but also has strong anti-interference ability of the system,ensuring good dynamic performance and robustness.关键词
电液伺服/非线性/液压变桨/滑模变结构/极点配置/AMEsim/Matlab联合仿真Key words
electro-hydraulic servo/nonlinear/hydraulic variable pitch/SMC/pole placement/joint simu-lation分类
机械制造
