Design And Research Of The Double Location Fuel Maniford Tester Hydraulic Control System

It is necessary to improve and update Chinese existing aircraft engine fuel injectionnozzle tester. It is old relatively. It has the following disadvantages: mostly manualoperation, the level of the technology behind that of the developed in the world. Besides,its accuracy of control and response speed of system can not meet the requirements. It cannot be made out of a very scientific and effective analysis for processing data.The thesis regards the fuel manifold which is consist of multiple fuel nozzle as theresearch object, and studies the control of pressure and the control of flow at which theworkpiece entrance of the fuel injection nozzle tester. The auther tries to use proportionalpressure relief valve and accumulator common control the pressure of system, and use twodifferent levels of pressure sensor to feedback the pressure at the outlet, then, input themeasured feedback signal into IPC, which was compared with the input signal, thedifference output, adjust the pressure, make the whole system form a closed loop.The author establishes the mathematical model which is on electro-hydraulicproportional relief valve pressure control system and electro-hydraulic proportionalreducing valve pressure control system, and applies MATLAB/SIMULINK simulationsoftware to simulate and compare for mathematical model of the system. In addition, theauthor provides control parameters which is consistent with the actual, analyzes thecharacteristics of the pressure dynamic response and draws the appropriate response curve.Comparing the result of theoretical research with that of measured; there is a littledifference between the simulation result and the measured result. Moreover, the authorverifies whether the states of each adjustment point match with regulation time andwhether experimental mechanism of the tester is correct or not. Such methods can beapplied to analysis of similar systems. In addition, the design of the tester and the selectionof the element also provide reference for the design of other similar devices.