复杂管网系统未知信息调节阀的一种瞬变建模方法  

A transient modeling method for unknown information regulating valves in complex pipeline network system

作　　者：王烨君 陈阳[1] 蔡国飙[1] 黄玉龙[2] 王仙勇[2] WANG Yejun;CHEN Yang;CAI Guobiao;HUANG Yulong;WANG Xianyong(School of Astronautics,Beihang University,Beijing 100083,China;Beijing Aerospace Measurement&Control Corp.,Beijing 100041,China)

机构地区：[1]北京航空航天大学宇航学院,北京100083 [2]北京航天测控技术开发公司,北京100041

出　　处：《北京航空航天大学学报》2020年第8期1535-1544,共10页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金(11101023)。

摘　　要：关键调节阀信息缺失是制约复杂管网系统可建模的重要因素。通过对调节阀建模研究的分类和总结,得出了多数调节阀的流量特性曲线均处于等百分比与线性之间的结论;进而针对结构和节流特性均未知的调节阀,提出了一种利用信息已知的基准阀门模型和有限的系统试验数据进行建模的方法。对核心机试验台气路系统中2个未知信息调节阀的建模与仿真表明:在常温0~1400 s、低温0~1240 s两种工况下,选用3种不同基准阀门模型仿真结果的差别低于10%,2个调节阀在47组件气路全系统仿真中的流量曲线与试验曲线之间的平均误差在15%以内,系统下游两支路的压强仿真曲线与试验曲线之间的最大误差低于15%,为解决此类问题提供了一种有效的建模方案。The information missing of key regulating valve is an important factor to restrict the modeling of complex pipeline network systems.After classifying and summarizing the modeling research of regulating valves,the conclusion that the flow characteristic curves of most regulating valves are between the equal percentage and the linearity is obtained.Based on this conclusion,a modeling method by using the information-known reference-valve model and the limited system test data is proposed for the valves whose structure and throttling characteristics are unknown.Then,this method is used to establish the models of two unknown-information valves in the core engine test rig gas circuit system.The application to two working conditions including 0-1400 s normal-temperature condition and 0-1240 s low-temperature condition shows that the differences of the simulation curves among three different reference-valve models are less than 10%;the average errors between the flow-rate simulation curves of two regulating valves in the 47-component system and the test curves are within 15%;the maximum errors between the pressure simulation curves and the test curves at two downstream branches are within 15%.Thus,the proposed method can provide an effective modeling scheme to solve this kind of problem.

关 键 词：核心机试验台 气体管网 系统动力学 未知信息阀门 瞬变建模 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]