Robust FDI for a ship-mounted satellite tracking antenna: A nonlinear approach

Overseas telecommunication is preserved by means of satellite communication. Tracking system directs the on-board antenna toward a chosen satellite while the external disturbances affect the antenna. Certain faults (beam sensor malfunction or signal blocking) cause interruption in the communication connection resulting in the loss of the tracking functionality. In this paper, an optimization based fault diagnosis system is proposed for the nonlinear model of the satellite tracking antenna (STA). The suggested method is able to estimate the fault for a class of nonlinear systems acting under external disturbances. The system is reformulated in the so-called standard problem setup. Finally, the applicability of the method has been verified through implementation on an antenna system.