Seung Ho Cho* and Petr Noskievič
The Journal of Mechanical Science and Technology, vol. 26, no. 2, pp.617-625, 2012

Abstract : This paper deals with the issue of position tracking control with load-sensing for a valve-controlled cylinder system using speedcontrolled 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.

Keyword : Position tracking control; Speed-controlled fixed displacement pump; Load-sensing control; Energy-saving; Sliding mode controller