电液位置伺服系统鲁棒反馈线性化控制

针对电液位置伺服系统存在强非线性和外界干扰不确定性的问题,提出将反馈线性化与滑模控制相结合的鲁棒反馈线性化控制策略。建立了电液位置伺服系统非线性模型,利用反馈线性化技术将其精确线性化,利用滑模控制来补偿其外界干扰不确定性,同时采用最优控制理论设计了切换函数,并引入模糊控制设计了自适应指数趋近律。以时变负载力扰动为例对系统性能进行了研究,仿真结果表明:该方法有效提高系统鲁棒性、加快响应速度和削弱了抖振。

Robust Feedback Linearization Control of Electro hydraulic Position Servo System

A robust feedback linearization control strategy was presented to strongly nonlinear and disturbance uncertainty for electro-hydraulic position servo system base on feedback linearization and sliding mode control .The nonlinear model of electro-hydrau-lic position servo system was established , by using feedback linearization to accurately linearization and sliding mode control to compen -sate disturbance uncertainty , meanwhile adopted optimal control theory to design switching function and introduced into fuzzy control to design adaptive exponent reaching law .The dynamic characteristics of the system was researched under time-varying load , the simula-tion results show that the control method enhances the system's robustness , accelerates response speed and reduces the chattering .