A Reverse Driving Control Method for Hydrostatic Double-drum Vibratory Rollers

A reverse driving control method for hydrostatic double-drum vibratory rollers is devised in this paper. Based on the analysis of dynamic characteristics of stopping process, the relationship equation between engine speed and pump displacement is established. To restrict the peak value of engine overspeed within the allowable region, an offline parameter determination approach complied with the requirements of average stopping deceleration is developed. The online control method using the selected parameter is presented. Approaches are derived to determine the two key parameters of the control methods, i.e., the critical deceleration value and the coefficient of relationship equation of the engine friction torque and the engine speed. The control method can also be applied to one type of hydrostatic machinery with their engine throttle position unchangeable in stopping process in addition to the doubledrum vibratory roller.