体积激励法测量液体推进剂量的地面模拟试验

The Simulation Test of Compression Mass Gauge for Liquid Propellant Measurement

针对大贮箱推进剂量测量精度不高问题,研究一种测量精度较高、重复性强的液体推进剂量测量方法。首先介绍体积激励法测量推进剂量的测量原理,重点分析地面模拟试验装置组成,包括体积激励装置、编码电机控制、数据采集及数据处理分系统。其次阐述试验方案,试验在常温常压下进行,采用不同激励频率改变体积。最后,以水作为模拟推进剂开展地面模拟试验,结果表明在不同填充水平下液体推进剂量测量误差都控制在贮箱总体积的1%以内,为未来高精度测量推进剂量飞行试验及空间应用提供可靠支持。

A liquid propellant gauging method named Compression Mass Gauge （CMG） with high accuracy is studied in this paper. Firstly, the theory of CMG and the ground test board system are introduced. The test system is composed of the compression construction, coder motor, data collection and processing subsystems. Then a test scheme is proposed. All tests are conducted under normal temperature and pressure and different excitation frequencies are selected. Finally, ground simulation tests are implemented and results are obtained. The results indicate that CMG measurement errors in different filling levels are less than 1% of the total tank volume. It is hoped that the present study can contribute to the liquid propellant gauge with high accuracy in future flight test and aerospace application.