容积伺服电液作动器位置控制研究

Position Control of the Volume Servo Electro-Hydrostatic Actuators

针对容积伺服电液作动器位置高精度控制问题,建立电液作动器位置控制数学模型,提出三状态反馈与三状态顺馈控制策略。该控制策略通过三状态反馈补偿系统固有频率和阻尼比,并利用三状态顺馈实现极点配置,进而对控制器进行参数优化设计,有效提高系统的动态特性。搭建容积伺服电液作动器实验平台,针对所提出的控制方法进行实验验证。研究结果表明:所提出的容积伺服电液作动器位置控制方法具有较好的控制效果,可实现电液作动器的高精度控制,控制精度达±0.01 mm,将为电液作动器的工程推广与应用奠定良好的基础。

Aiming at the problem of high-precision position control for the volume servo electro-hydrostatic actuators,the mathematical models of electro-hydraulic actuator position control were established,and the three-state feedback and three-state feed-forward control strategy was proposed.This control strategy adjusts the natural frequency and damping ratio of the system through the three-state feedback,and uses the three-state forward feed to achieve pole configuration,and then optimizes parametric design for the controller,improving the dynamic characteristics of the system effectively.A test platform for volume servo electro-hydraulic actuators was built,and experimental verification was performed for the proposed control method.The results show that the proposed position control method of volume servo electro-hydraulic actuator has good control effect,and can achieve high-precision control of the electro-hydraulic actuator with the control accuracy of±0.01 mm.This study may provide a foundation for the engineering promotion and application of electro-hydraulic actuators.