Position tracking control with load-sensing for energy-saving valve-controlled cylinder system

Abstract

This paper deals with the issue of position tracking control with load-sensing for a valve-controlled cylinder system using speed-controlled fixed displacement pump. This is achieved by incorporating a sliding-function based feedforward controller with a feedback control system. The whole feedback control system is composed of a pair of interconnected subsystems, that is, a valve-controlled cylinder system and a load-sensing control system. Experiments show that sliding-mode-based position tracking control in the load sensing control system can accomplish significant reduction in the input energy to a pump compared to a conventional valve-controlled cylinder system, while exhibiting the same position tracking control accuracy.