Cold-gas thrusters are a common choice for the propulsion system of smaller satellites. This paper studies the problem of modeling, fault detection, and fault isolation of a typical cold-gas thruster system. First, the laws of the conservation of mass, energy, and momentum are employed to develop a dynamical model of the thruster system. Then, the dominant sources of uncertainty affecting this model are investigated. Based on the developed model and the structure of uncertainties, a suitable fault-detection and isolation (FDI) technique is selected from the literature and is tailored to the problem at hand. The performance of the FDI technique applied to a cold-gas thruster system is assessed in common fault scenarios. It is shown that the proposed technique is able to robustly detect and isolate these common faults without triggering false positives due to uncertainties and disturbances.
Modeling, Fault Detection, and Fault Isolation for Cold-gas Propulsion Systems
2022-08-23
642610 byte
Conference paper
Electronic Resource
English
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