Design And Implementation Of The Software And Hardware For The Electro-hydraulic Control System Of The Moving Lifting Test Device

Due to the fact that a mass of hydraulic pipelines are distributed inside the aircraft wing, the quality and reliability of the hydraulic pipelines are crucial to the safe operation of the hydraulic system and even the whole plane. Hence, there is an important and profound significance to study the vibration of the hydraulic pipelines. Under the background of the project ‘Fatigue Test of the Hydraulic Pipelines for a Certain Type of Airplane' from a research institute, the Electro-hydraulic control system of the Motion lifting device designed in this thesis drive the beam to simulate dynamic deformation of aircraft wing when the plane during takeoff and flight. So as to evaluate the fatigue durability of hydraulic pipelines mounted on the beam.Firstly, combined with engineering practice, analyzing the phenomena of large bending deformation and slight vibration for large aspect ratio wing during plane flight, which leads to the technical requirements of this test system. From the design requirements and test precision, the test device's control system use electro-hydraulic servo control system, and make the overall design for this control system.Secondly, according to the motor function of the test device, the hardware circuit connection around the PIC controller, as the core of the electro-hydraulic control systems, have been designed, which includes long-stroke asymmetric cylinder control circuit, short-stroke symmetric cylinder control circuit and serial communication circuit. On the basis of the hardware, the PIC microcontroller program have been designed, which includes communication protocol, the overall design of the control program and the software of the main functional modules.Finally, the debugging and testing of the entire system have been conducted, after building the platform of the test device. Both the manual mode and automatic mode for debugging and testing are accomplished successively. Through the site debugging and testing, the performance of the electro-hydraulic control system for this test device have been validated in integrity and reliability.