METHOD OF USING FEEDFORWARD COMPENSATION BASED ON PRESSURE FEEDBACK FOR CONTROLLING SWASH PLATE ANGLE IN A HYDROSTATIC POWER UNIT OF A CONTINUOUSLY VARIABLE TRANSMISSION

摘要

A swash plate angle for a hydrostatic power unit of a continuously variable hydromechanical transmission is determined using a feedforward compensation term, to reduce reliance on closed loop control. The feedforward term is based on knowledge of the hydrostatic power unit determined as a function of knowledge of certain parameters, including, but not limited to, hydrostatic power unit pressure, swash plate angle, desired hydrostatic power unit ratio, and pump speed.