中文摘要：

针对传统恒压供气系统普遍存在控制精度低、充气速度慢的问题，设计一套由PID算法控制的电气比例阀和电磁阀独立控制的充气系统。采用大、小管径多通道组合方式，对定积容器进行充气实验，系统采用高速数据采集卡，结合LabVIEW软件分析实验数据。基于气动系统的流量特性，分别建立单通道、双通道、三通道充气装置的充气时间与管道管径、长度的数学模型。Matlab仿真曲线表明，对于定积容器，充气管路的长度越小、管径越大、并联的管路越多，充气时间越短；目标充气压力越高，管路长度对充气时间的影响越明显。实验数据验证仿真模型的正确性，采用多通道组合供气方式缩短充气时间，提高精度。

英文摘要：

n view of low control accuracy and slow inflation velocity generally seen in traditional constant pressure air supply system, an inflation system respectively controlled with electrical proportional valve and solenoid valve based on PID algorithm is designed and built in compound mode with large and small diameter channels for air inflation experiment on specified -volume vessel. The system employs high-speed data acquisition card on the basis of LabVIEW software to analyze the experimental data. On the strength of the flow characteristics of pneumatic system, the mathematical models for air inflation time and tube diameter and length of single-channel, dual-channel and three -channel inflatable device are established in respective. According to Matlab simulating curve, for the specified -volume vessel, the shorter length of air inflation tube and the bigger the tube diameter, more tubes need to be paralleled with shorter time for air inflation; the higher the target inflation pressure, more effect from the length of tube will be imposed on the air inflation time. The experimental results have verified the correctness of the simulation model and that multi-channel inflation system helps to shorten air inflation time and improve accuracy.