position control of high performance hydrostatic actuation system using a simple adaptive control (sac) method

  this paper deals with the issue of position tracking control of a high performance hydrostatic actuation system using simple adaptive control. for energy-efficiency and savings, a speed-controlled fixed displacement pump is utilized to drive a symmetrical linear actuator instead of a directional control servo valve. the whole control system is composed of a pair of interconnected subsystems, that is, a feedback control system and a feedforward control system to enhance the tracking performance. the experiment using the proposed control scheme has been performed and a significant reduction in position tracking error is achieved compared to a conventional pid control.