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Accession Number ADA562708
Title Stage Separation Failure: Model Based Diagnostics and Prognostics.
Publication Date Oct 2010
Media Count 10p
Personal Author A. Patterson-Hine D. Luchinsky I. Kulikov V. Hafiychuk V. Smelyanskiy
Abstract Safety of the next-generation space flight vehicles requires development of an in-flight Failure Detection and Prognostic (FD&P) system. Development of such system is challenging task that involves analysis of many hard hitting engineering problems across the board. In this paper we report progress in the development of FD&P for the re-contact fault between upper stage nozzle and the inter-stage caused by the first stage and upper stage separation failure. A high-fidelity models and analytical estimations are applied to analyze the following sequence of events: (i) structural dynamics of the nozzle extension during the impact; (ii) structural stability of the deformed nozzle in the presence of the pressure and temperature loads induced by the hot gas flow during engine start up; and (iii) the fault induced thrust changes in the steady burning regime. The diagnostic is based on the measurements of the impact torque. The prognostic is based on the analysis of the correlation between the actuator signal and fault-induced changes in the nozzle structural stability and thrust.
Keywords Booster rocket engines
Diagnosis(General)
Dynamics
Nozzles
Predictions
Separation
Spacecraft
Structural dynamics
Symposia


 
Source Agency Non Paid ADAS
NTIS Subject Category 81G - Rocket Engines & Motors
84G - Unmanned Spacecraft
Corporate Author National Aeronautics and Space Administration, Moffett Field, CA. Ames Research Center.
Document Type Technical report
Title Note Conference paper.
NTIS Issue Number 1225
Contract Number N/A

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