多级伺服阀驱动的液压执行器非线性前馈控制

为了满足自由活塞发电机(FPLG)中液压执行器对高频率和大行程的要求,设计了一种多级伺服阀驱动的液压执行器非线性前馈控制器。主要包括一个双动液压工作的活塞和一个三阶段成比例的伺服阀驱动。提出的前馈控制器结合传统的反馈控制方法,并基于反演模型生成前馈控制算法,在考虑了系统的预测负载力的条件下,前馈控制器接受液压执行器上承受的预测动态负载作为输入,用于跟踪预期轨迹的最佳输入信号。通过模拟测试验证了该控制器的有效性和实用性,满足了自由活塞式发电机发展的需要。

Nonlinear Feedforward Control of Hydraulic Actuator Driven by Multistage Servo Valve

In order to satisfy the requirements of high frequency and large stroke in the hydraulic actuator of free piston generator ( FPLG) , a nonlinear feedforward controller for a hydraulic actuator was designed and driven by multistage servo valve .A double acting hydraulic operated piston and a proportional servo valve driven by a three stage were mainly included .The feed forward controller com-bined with traditional feedback control method , and inversion model to produce the feedforward control algorithm based on , considered the prediction of the system load conditions , the feedforward controller was acept of hydraulic actuating device under the prediction of dynamic load as input for tracking expected trajectory of the optimal input signal .The simulation tests verify the effectiveness and prac-ticality of the proposed controller , which can meet the needs of the development of the FPLG .