基于独立主成元的低温气动阀动态响应分析方法

Dynamic Response Analysis Method of Cryogenic Pneumatic Valve Based on Principal Component

为了在液体火箭发动机试验过程中提升低温气动阀的响应速度,全面定量分析低温气动阀动态特性的影响因素,根据低温气动阀的工作原理,分析了低温气动阀的动态响应时间特性;基于动力学特性,建立了低温气动阀动态响应特性模型;在此基础上,采用独立主成元分析方法,对动态响应影响因素与响应时间关系进行了非线性定量分析,确定了主要影响因素;通过实例验证了该方法的准确性与实用性,为阀门设计与结构改进提供定量取值参考,为缩短低温气动阀的响应时间以及提高试验系统能力提供了一种方法支撑。

To improve the respond speed of the cryogenic pneumatic valve during the liquid rocket engine test, and to conduct comprehensive and quantitative analysis of the influencing factors of the cryogenic pneumatic valve dynamic characteristics, the time characteristics of the cryogenic pneu-matic valve were analyzed according to the operation principle of the cryogenic pneumatic valve, and the dynamic response mode of the cryogenic pneumatic valve was established based on velocity dy-namics theory. Then, the key influencing factors were defined and nonlinear quantitative analysis between the dynamic responses and influencing factors was conducted with principal component anal-ysis （ PCA ） . Finally, the effectiveness of the proposed method was verified by a case study. It was showed that the proposed method could improve the response time and the reliability of the cryogenic pneumatic valve, and could provide support for the performance evaluation of the rocket engine.