高压气动系统负载容腔压力伺服控制仿真研究

为满足某气体发生系统安装空间小、重量轻、动态响应快、控制精度高等要求，设计了高压气动压力伺服控制系统，并采用高压电-气伺服阀实现了负载压力的高响应高精度控制。建立了系统数学模型，包括高压气瓶热力学方程、高压电-气伺服阀传递函数与流量方程、负载容腔压力变化与排气流量方程等子模型，并设计了反馈线性化PID控制器。基于MATLAB/Simulink平台建立了高压气动系统仿真模型，仿真研究了高压气瓶容积与初始气源压力、负载容腔排气孔通径等参数对系统负载压力控制性能的影响规律。研究结果为该系统的优化设计与实验研究提供重要理论依据。

Simulation of Load-vessel Pressure Control for High Pressure Pneumatic System

To meet the requirement of small installation space, lightweight, dynamic quick response and high control precision for the pneumatic control system of gas generation system, this article designs a high pressure pneumatic pressure servo control system, and achieves high-response and high-accuracy control of load pressure by using high pressure electric-pneumatic servo valve. The mathematical model is built, including high-pressure cylinder thermodynamic equation, the high pressure electric-pneumatic servo valve transfer function and flow equation, the load-vessel pressure variation and exhaust flow equation, etc, and a feedback linearization PID controller is designed. Based on the MATLAB/Simulink platform, a simulation model of high pressure pneumatic system is established. The influence rules of the parameters of the volume and initial pressure of the high-pressure cylinder, the size of the load-vessel air-bleed hole for the control capability of the load pressure system is simulated.