Design Of Automatic Pressure-regulating High-pressure Helium Blowing Control System

With the international political situations being more and more complicated,our government has been paying more and more focus on defense and space industries.Therefore,the ordering of launch vehicles and weapons are rising.That leads to an increasing demand of servo system helium-driven tests.There exists many drawbacks on manual controlled helium-driven test of servo system.The helium-driven test of servo system is a test method which utilizing high pressure helium to drive high-speed turbo pump,then the nozzle is swung in predefined directions by hydraulic actuators which is driven by high pressure hydraulic oil from turbo pump.It is required that the helium pressure to be stable to maintain the proper working state of turbo pump,hence the aim of helium-driven system is to obtain helium flow with constant high pressure.The manual controlled helium-driven test relies highly on the performance of the operator,which result in low efficiency,hence the accomplish rate is low.Meanwhile manual control requires experienced operators and draw much attention from them,which result in high uncertainties,such as waste of helium,casualties,and damage of equipment,high cost and low safety.The control accuracy of manual control is low,so the precise working conditions during flying cannot be emulated,which result in low adequacy of test,and inadequate for the flight risk control.To accomplish the rapidly increasing of test missions,it is highly demanded to develop an automatic helium-driven control system which does not need human operation,in order to enhance the test efficiency and the control accuracy,hence to ensure safety.A server-based unified test method is presented,which implements remote concentrated control of multiple devices,the test efficiency is enhanced.This method adopts segmented close-loop control algorithm instead of manual pressure adjustment to implement pressure control in order to enhance pressure control accuracy.High and low pressure buffer bottle is used to compensate transfer delay caused by long gas pipes,the rapidness of pressure control is guaranteed.A step self testing method is used to generate different control algorithm for different controlled objects,in order to adapt different characteristics of products in different installation sites.Self-positioning algorithm is utilized in different controlled objects,so manual adjustment is not needed and the efficiency is therefore enhanced.Multiple interlock technology was incorporated to minimize risk of device failure and casualties,besides improve the safety during test.Test data are double backup to ensure no data loss happen,so as to guarantee the effectiveness of the test.