氢/氧火箭发动机试验自动紧急关机程序设计

Design of automatic emergency cut-off program in LH_2/LOX engine test

在氢/氧火箭发动机试验过程中,对发动机关键参数进行监测,及时发现异常或故障趋势,并快速实施自动紧急关机是非常重要的。本文在Pacific 6000数据采集控制系统的基础上,使用Visual C++开发环境对其自带的采集软件PI660进行二次开发,实现高精度自动紧急关机判读功能。在紧急关机程序设计中,定时器的精度直接影响判读的准确性,通过对几种定时器精度的测试和分析,选取"多媒体定时器"用于自动紧急关机程序,并结合Pacific 6000数据采集控制系统的特性,综合分析了自动紧急关机程序的响应时间及可靠性。

In LH2/LOX rocket engine test for real-time monitoring of the engine＇s critical parameters, it is very important to find the abnormal phenomenon and fault trend, and make a response quickly. In this paper, based on Pacific 6000 DAS, Visual C＋＋ development environment is used to make the redevelopment of its own software PI660 to implement the high-precision automatic emergency cut-off function. The accuracy of program＇s timer directly affects the precision of interpretation in design of the emergency cut-off program. The multimedia timer was selected for automatic emergency cut-off program after testing and analyzing the precision of several timer. Besides, combining with the characteristics of Pacific 6000 DAS, the response time and responsibility of the automatic emergency cut-off program were analyzed.