An intelligent control system for pump environment simulation and testing for electro-hydrostatic actuators

Abstract

The invention discloses a pump environment simulation and testing intelligent control system for an electro-static hydraulic actuator. The oil pressure side of the tested pump enters the oil return circuit through a pressure sensor group, a proportional relief valve group and a flow meter group; The signal receiver, the PLC difference calculator and the PID regulator are electrically connected in sequence; the signal receiver is electrically connected with the A / D converter and the transmitter in sequence, and the transmitter is electrically connected to the pressure sensor group and the flowmeter group respectively. The PID regulator is electrically connected with a D / A converter, and the D / A converter is electrically connected with the motor and the proportional relief valve group respectively; the information input unit is electrically connected with the signal receiver. According to the required load loading curve and the feedback of the pressure signal and the flow signal as the basis, the invention changes the motor speed and the set pressure of the proportional relief valve group, so that the pressure and flow of the tested pump are changed as needed, and the pressure of the pump is changed. Continuous and stable intelligent test control for performance.

Description

technical field [0001] The invention relates to the technical field of pump testing, and more particularly to an intelligent control system for pump environment simulation and testing for an electro-hydrostatic actuator (EHA). Background technique [0002] Airborne flight control actuation system refers to a system that can output energy and mechanical actions for aircraft attitude control. The traditional flight control actuation system adopts the form of "power pipe transmission". The central hydraulic source sends pressure oil to the hydraulic actuators of each flight control rudder surface through the hydraulic pipeline to control the rudder surface action. With the generation and development of the concept of "power-by-wire", electrical energy will gradually replace hydraulic energy and become the main energy source for flight control actuation systems. As a typical power electric actuator, the electro-hydrostatic actuator will gradually replace the traditional hydraul...

AI Technical Summary

Problems solved by technology

The working environment of the pump for electrostatic hydraulic actuator is a closed environment. The pump absorbs oil from the pressurized oil tank and outputs pressure oil to the actuator, and the return oil of the actuator enters the pressurized oil tank. In order to achieve high power density, electrohydrostatic actuators often use high-speed and high-pressure pumps, which generate a huge amount of heat. If a traditional closed system is used to simulate the normal use environment to test the pump under laboratory conditions, it is bound to suffer due to heat generation. Too large to cause the test to be unsustainable and stable for a long time

Images