关键词: 微压富氧, 压强升降, 追踪曲线, PI算法

Abstract: A pressure control system based on PI algorithm is proposed.In order to make the pressure of the micro-pressure and oxygen-rich cabin stable and controllable at the lifting stage and maintain the pressure at a steady pressure.Control the rate of pressure change by tracking the slope of the target curve and track the value of the curve control pressure.Establish the mathematical model of the pressure in the cabin;use Matlab/Simulink to establish the simulation model of the control system;and set the PI parameters of each stage.The simulation results show that the ascending and descending speed can reach steady state quickly,less error,the overshoot is small and the pressure rise and fall can effectively follow the target curve.At the same time,the experiment is carried out.The experimental results show that the pressure model of micro-pressure and oxygen-rich cabin is correct and the control method is feasible.

Key words: micro-pressure oxygen enrichment, pressure rise and fall, curve tracking, PI algorithm