ELECTRO-HYDRAULIC CONTROL SYSTEM FOR A POWER DRIVE UNIT

摘要

An electro-hydraulic control system for a power drive unit having a wobbler controlled variable displacement hydraulic motor (10) wherein the electro-hydraulic control system causes the displacement of the hydraulic motor to match a load to be driven by a power drive unit output shaft coupled to the motor. The system results in the hydraulic motor displacement matching the load as a combined function of the input command signal (14), the actual wobble position (24), as well as the velocity (15) and position of the power drive unit output shaft (55).