SPACE SHUTTLE ORBITAL MANEUVERING SYSTEM FAILURE DETECTION AND IDENTIFICATION SOFTWARE REQUIREMENTS (UNCONTROLLED)

摘要

This report presents candidate designs and their software imple-mentation for the Orbital Maneuvering System (OMS) Failure Detection and Identification (FDI) algorithms in the Redundancy Management (RM) module of the Space Shuttle Guidance, Navigation, and Control (GN&C) software. The OMS engine FDI algorithm monitors OMS engine thrust performance, and the OMS actuator FDI a3gorj.thm monitors OMS gimbal actuator performance.nSection 1 describes the software functional requirements of the algorithms. It contains a statement of the objective of each algorithm, a list of the assumptions which have governed its design, input-output requirements, a functional description of the algorithm (including a functional block diagram), and input interface requirements. Section 2 is concerned with the HAL* software formulation of the algorithms. This section contains structured flowcharts of the procedures, estimates of flight computer core storage and CPU time, and processing requirements. Section 3 contains a glossary of the symbols used to define the soft¬ware requirements and formulation, and the Appendices contain material which is supportive in nature to the preceding sections.