直接驱动阀的阀芯摩擦力自适应补偿研究

Research of Adaptive Friction Compensation for Direct Drive Valve

针对直接驱动阀阀芯摩擦力,论述了基于模型的摩擦力自适应补偿。描述了几种摩擦力的动静态模型,建立了直接驱动阀的动态模型,设计了基于摩擦力动态补偿的自适应补偿器,并采用SIMULINK和AMESIM联合仿真进行了验证。结果表明:基于LuGre模型的摩擦力自适应动态补偿控制器能够有效改善摩擦的非线性特性对DDV式作动器性能的影响。

An adaptive friction compensation scheme for direct drive valve was proposed based on LuGre model. Several model of friction was described, especially LuGre z model. The dynamic model of direct drive valve （DDV） was built, and an adaptive friction compensation controller was designed. In order to verify the performance of adaptive controller, simulation models based on SIMULINK and AMESIM were built, and co-simulation of SIMULINK and AMESIM was carried out. The results show that the adaptive controller improves a lot of DDV dynamic performance, which is influenced by hard nonlinearity due to friction.