Signal to disturbance effects in strapdown northfinder

A theoretically dynamic exact method is proposed for achieving large angular disturbance rejection. By defining an analytic virtual plane, the problem of angular disturbance rejection is made amenable for the application of signal-processing concepts within the scope of modern strapdown inertial systems. Dynamic matching of sensor bandwidth and filter algorithm is used to obtain the required results. Results of simulations indicate that the approach proposed here considerably reduces rotational disturbances while keeping signal processing requirements within reasonable and affordable boundaries.