某小推力发动机试验系统自动器故障仿真研究  

Simulation of automatic actuator fault in a low-thrust rocket engine test system

作　　者：于锐渤 石奇玉 张黎辉[1] 段娜 YU Ruibo;SHI Qiyu;ZHANG Lihui;DUAN Na(School of Astronautics,Beihang University,Beijing 102206,China;Beijing Institute of Astronautics Testing Technology,China Aerospace Science and Technology Corporation,Beijing 100048,China)

机构地区：[1]北京航空航天大学宇航学院,北京102206 [2]中国航天科技集团有限公司北京航天试验技术研究所,北京100048

出　　处：《航空动力学报》2024年第8期226-237,共12页Journal of Aerospace Power

摘　　要：针对某小推力发动机试验系统中自动器故障的情况,建立了包括气动液阀、减压器、燃烧室、贮箱等组件模型,在Amesim平台上搭建试验系统仿真模型。通过仿真结果与试验数据的对比,验证了组件模型及仿真系统对试验系统实际工作情况的模拟效果,系统稳定工作阶段各主要参数的误差不超过2.8%。在系统正常工况基础上,对气动阀控制腔泄漏和减压器内漏两种故障下系统工况进行仿真计算,得到了故障工况下系统各参数的预测结果:减压器内漏故障发生30 s后,燃烧室压力可偏移正常工况14.3%,混合比偏移37.3%;气动阀泄漏面积达到24 mm2时,推进剂阀门将完全关闭。仿真结果对试验系统故障工况做出预测,并为故障分析、识别等积累了数据。Taking the fault conditions of automatic actuator failure in a low-thrust liquid rocket engine test system as the research object,the models of the pneumatic liquid valve,the pressure regulator,the combustion chamber and the propellant tank were conducted.And the simulation system was built on Amesim platform.Through comparison between calculated data and test data,the reliability of new models was verified respectively.Furthermore,the simulation effect on the normal working condition of the whole test system was demonstrated,showing that the steady state error of main parameters was less than 2.8%.Based on the normal working condition,the prediction results of fault conditions under failure of the pneumatic liquid valve control cavity leakage and the pressure regulator internal leakage were calculated.The results showed that the chamber pressure can deviate from the normal conditions by 14.3% and the mixing ratio by 37.3% after the failure of pressure regulator internal leakage for 30 s.And when the leakage area of the pneumatic valve reached 24 mm2,the propellant valve was completely closed.The prediction results can be accumulated for further work on fault detection,fault analysis and intelligent control of the test system.

关 键 词：试验系统 自动器 AMESIM 气动阀泄漏 减压器内漏 故障仿真 

分 类 号：V434.23[航空宇航科学与技术—航空宇航推进理论与工程]