An Expert Systems Approach to Automated Maintenance for a Mars Oxygen Production System

Expert systems for automated maintenance of a Mars oxygen productionsystem

“…A knowledge-based expert system is then developed to provide the following: 1) data acquisition and self-health checkout, 2) emergency shutdown, 3) failure detection and isolation, and 4) computerbased simulation and realization. 16 Each element is described separately in the following discussion. a) Data acquisition and self-health checkout.…”

“…c) Failure detection and isolation. A knowledge-based algorithm for system FDI has been developed and is described by using the block diagrams developed by Huang et al 16 From the acquired sensor data, the FDI algorithm can identify each existing failure mode under the assumptions that main power, computer, and the data acquisition system never fail and only one failure mode may occur at a time. For those failure modes not considered or those that combine at least two known failure modes, the FDI algorithm can only display the existing symptoms, turn on the alarm, and continue to monitor the system.…”