Fault diagnosis for satellite attitude control system based on FDDPB

For satellite attitude control system fault diagnosis, step type and slow drift type output bias of actor and sensor were considered as parameter bias fault. Fault detection and diagnostics of parameter bias(FDDPB) algorithm and its application on actor and sensor of satellite attitude control system were introduced. The simulation models were proposed after describing satellite attitude dynamics model and wheel model. Simulations were finished on the assumption that step type fault and slow drift type fault occurred. Simulation results show that FDDPB algorithm could detect system fault and was able to estimate fault amplitude accurately.