Strategy Analysis of Override-Control for Drum Height of Shearers

Abstract

Aiming to solve the switch problem between auto-and manual-operation of shearer memory-cut due to variation of coal seam conditions, this paper proposes a method that introduces the strategy of override control to the controlling system of shearer memory-cut. This study also improves the control of hydraulic system for lifting cylinder, and designs an override control system for lifting cylinder of shearer. The procedure for controlling the height adjustment mechanism is thus addressed to offer a new control means for reliable operation of the shearer during operations.