Automated Contingency Management for Water Recycling System

Tang, Shijie ; Niu, Guangxing ; Zhang, Bin ; Thakker, Ash ; Vivanco, Santiago ; Martin, Rodney ; Moore, Craig

关键词: AUTOMATIC CONTROL;    WATER RECLAMATION;    SYSTEMS HEALTH MONITORING;    MANAGEMENT SYSTEMS;    CONTINGENCY;    MANAGEMENT PLANNING;    SPACE HABITATS;    DYNAMIC PROGRAMMING;    DYNAMIC CHARACTERISTICS;    FAULT DETECTION;    ERROR ANALYSIS;   

RP-ID  :  ARC-E-DAA-TN60675

学科分类：航空航天科学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

To enable effective management, planning, and operations for future missions that involve a crewed space habitat, operational support must be migrated from Earth to the habitat. Intelligent System Health Management technologies (ISHM) promise to enable the future space habitats to increase the safety and mission success while minimizing operational risks. In this paper, Water Recycling System (WRS) deployed at NASA Ames Research Center's Sustainability Base is used for verification and validation of the proposed solution. Our work includes the development of the WRS simulation model based on its dynamic physical characteristics and the design of Automatic Contingency Management (ACM) framework that integrates fault diagnosis and optimization. In WRS modeling, a nominal model with fault injectors is developed. Fault detection and isolation techniques are then developed for isolating causes and identifying the severity of the faults. Dynamic Programming (DP) based fault mitigation strategies are designed to accommodate the faults in the system. A series of simulations are presented with different fault modes and the results indicate that the proposed ACM system can alleviate the fault in the WRS optimally regarding energy consumption and effects of the fault.