Progress and results in the development of an integrated air quality modeling, monitoring, fault detection, and isolation system are presented. The focus was on development of distributed models of the air contaminants transport, the study of air quality monitoring techniques based on the model of transport process and on-line contaminant concentration measurements, and sensor placement. Different approaches to the modeling of spacecraft air contamination are discussed, and a three-dimensional distributed parameter air contaminant dispersion model applicable to both laminar and turbulent transport is proposed. A computer implementation of the transport model is considered and a detailed development of two- and three-dimensional models illustrated by contaminant transport simulation results is presented. The use of a well established Kalman filtering approach is suggested as a method for generating on-line contaminant concentration estimates based on both real time measurements and the model of contaminant transport process.
Modeling, Monitoring and Fault Diagnosis of Spacecraft Air Contaminants
1996
68 pages
Report
Keine Angabe
Englisch
Manned Spacecraft , Life Support Systems , Air quality , Contaminants , Gas detectors , In-flight monitoring , Indoor air pollution , Pollution monitoring , Spacecraft cabin atmospheres , Spacecraft contamination , Pollution transport , Environment models , Gaseous diffusion , Kalman filters , Three dimensional models , Transport theory , Two dimensional models