液体火箭发动机地面试车实时故障检测参数的选取  

Selection of Real-time Fault Detection Parameters for Liquid-propellant Rocket Engines in Ground Tests

作　　者：谢廷峰[1] 刘洪刚[1] 黄强[1] 吴建军[1] 

机构地区：[1]国防科技大学航天与材料工程学院,长沙410073

出　　处：《航天控制》2008年第6期77-81,85,共6页Aerospace Control

基　　金：教育部"新世纪优秀人才支持计划(NCET-06-0927)"

摘　　要：合理有效的参数选择是液体火箭发动机地面试车实时故障检测系统的一个核心而基础的研究问题。本文首先进行了检测系统采集参数的需求分析;之后将液体火箭发动机测量参数作为方案层,各测量参数对发动机故障的敏感性、参数稳定性和参数相关性等作为准则层,测量参数对实时故障检测的有效性作为目标层,建立了液体火箭发动机参数选择层次结构模型;最后利用模糊层次分析法确定了某型LRE地面试车的实时故障检测参数。通过历史试车数据对参数选择的效果分析表明:所确定的检测参数能够全面表征LRE的运行状态,具有较强的故障表征能力和故障敏感性。从而,为科学合理的选择发动机地面试车实时故障检测参数提供了根据,解决了一直以来依靠定性方法确定发动机检测参数的问题。It is a pivotal and basic issue to choose the parameter,~ of real-time fault detection system （ RTFDS） for liquid-propellant rocket engine （LRE） in ground test. The parameters requirement analysis is finished firstly. Then the hiberarchy model for parameters selection of the LRE is established with measurement parameters as project layer; fault sensitivity, stability and relativity of measurement parameters as criterion layer; and the validity of measurement parameters for real-time fault detection as object layer. Finally,based on the fuzzy analytic hierarchy process （FAHP） , the real-time fault detection parameters of the LRE in ground tests are determined. The effect analysis results with history tests data show that the fault detection parameters determined can express roundly the LRE operation, and with perfect fault sensitivity. It provides the scientific and logical basis for choosing the fault detection parameters of LRE in ground tests, and at the same time the problem to choose the fault detection parameters qualitatively is solved.

关 键 词：液体火箭发动机 地面试车 模糊层次分析法 实时故障检测参数 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程] TP277[自动化与计算机技术—检测技术与自动化装置]