PRELIMINARY INPUT TO THE SPACE SHUTTLE REACTION CONTROL SUBSYSTEM FAILURE DETECTION AND IDENTIFICATION SOFTWARE REQUIREMENTS

摘要

The current baseline method and software implementation of the Space Shuttle reaction control subsystem failure detection and identifi-cation (RCS FDI) system is presented. This algorithm is recommended for inclusion in the redundancy management (RM) module of the Space Shuttle Guidance, Navigation and Control System. Supporting software is presented, and recommended for inclusion in the system management (SM) and display and control (D&C) systems.nRCS FDI uses data from sensors in the jets, in the manifold iso¬lation valves, and in the RCS fuel and oxidizer storage tanks. A list of jet failures and fuel imbalance warnings is generated for use by the jet selection algorithm of the on-orbit and entry flight control systems, and to inform the crew and ground controllers of RCS failure status. Manifold isolation valve close commands are generated in the event of failed on or leaking jets to prevent loss of large quantities of RCS fuel.