Fault diagnosis in spacecraft attitude control system |
Posted on:2006-12-09 | Degree:M.A.Sc | Type:Thesis |
University:Concordia University (Canada) | Candidate:Azarnoush, Hamed | Full Text:PDF |
GTID:2452390005993580 | Subject:Engineering |
Abstract/Summary: | |
This thesis presents a method for fault diagnosis in spacecraft attitude control system. The focus of this diagnosis problem will be on the actuator components. The considered actuator is assumed to be a reaction wheel. Since the attitude model of the spacecraft to be used is a coupled three-axis, three reaction wheels are required to provide actuation signals in this system. A high-fidelity model of the reaction wheel is considered which incorporates the effect of most disturbances involved in practice. A controller is designed to guarantee the stability of the signals in the system. This controller is designed according to nearly ideal model of the reaction wheel in a single axis system. The performance of this controller is validated for the three-axis nonlinear model of the spacecraft attitude control system using nonlinear model of the reaction wheel. (Abstract shortened by UMI.)... |
Keywords/Search Tags: | Spacecraft attitude control system, Fault diagnosis, Reaction wheel, Nonlinear model |
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