Fault detection in reaction wheel of a satellite using observer-based dynamic neural networks

Abstract

This paper presents a methodology for the actuator fault detection in the satellite's attitude control system (ACS) by using a dynamic neural network based observer. In this methodology, a neural network is used to model a nonlinear dynamical system. After training, the neural network, it can give very accurate estimation of the attitude positions of the satellite. The difference between the actual and the estimated outputs is used as a residual error for fault detection. The simulation results show advantages of this method as compared to the method based on a generalized Luenberger linear observer. © Springer-Verlag Berlin Heidelberg 2005.