Life Prediction for Circulation Pump of Manned Spacecraft Based on Wiener Process

Abstract

Abstract: Reliability of eccentric pump of manned spacecraft is very high,life data is rare.It's difficult for traditional reliability analysis methods based on life data to meet the engineering re- quirements.Firstly,lift and power were proved to be two critical performance parameters for circu- lation pump.The Wiener process with drift was proposed to fit the degradation process of the two performance parameters.The random weighted method was proposed to solve the small sample problem confronted in estimating parameters for degradation paths.The life distribution model was obtained by random process theory.In the end,the life of circulation pump is predicted to illustrate the effectiveness of the model.

Key words: Centrifugal pump, Life prediction, Thermal control, Wiener process, Reliability analysis, Manned spacecraft

Feng Jing Zhou Jinglun (College of Information System and Management,National University of Defense Technology,Changsha 410073). Life Prediction for Circulation Pump of Manned Spacecraft Based on Wiener Process[J]. Chinese Space Science and Technology.

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Life Prediction for Circulation Pump of Manned Spacecraft Based on Wiener Process

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