Energy reverse transmission analysis of collaborative rectification structure pump

This paper studies the energy reverse transmission of a new type collaborative rectification structure pump, which uses a linear reciprocal machine drives a piston directly to pump hydraulic fluid. This pump is designed for a novel electro-hydrostatic actuator which is a kind of volume control electro-hydraulic servo system. For servo control application, the pump is usually required to transfer energy in both positive and reverse direction, which means it not only can work as a pump, but also be required to work as a motor to drive the electrical machine as a generator. The purpose of this research is to study the characteristics of reverse transmission of this new pump. The kinematics flow rate model and dynamic model of the pump are presented firstly, and then a proof of the ability of reverse transmission and the stability criterion are discussed. Finally its characteristics in reverse transmission are verified based on simulation.