Development of an intelligent diagnostic system for reusable rocket engine controlA description of an intelligent diagnostic system for the Space Shuttle Main Engines (SSME) is presented. This system is suitable for incorporation in an intelligent controller which implements accommodating closed-loop control to extend engine life and maximize available performance. The diagnostic system architecture is a modular, hierarchical, blackboard system which is particularly well suited for real-time implementation of a system which must be repeatedly updated and extended. The diagnostic problem is formulated as a hierarchical classification problem in which the failure hypotheses are represented in terms of predefined data patterns. The diagnostic expert system incorporates techniques for priority-based diagnostics, the combination of analytical and heuristic knowledge for diagnosis, integration of different AI systems, and the implementation of hierarchical distributed systems. A prototype reusable rocket engine diagnostic system (ReREDS) has been implemented. The prototype user interface and diagnostic performance using SSME test data are described.
Document ID
19910061194
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Anex, R. P. (Systems Control Technology, Inc. Palo Alto, CA, United States)
Russell, J. R. (Systems Control Technology, Inc. Palo Alto, CA, United States)
Guo, T.-H. (NASA Lewis Research Center Cleveland, OH, United States)