Patent ID: 7729816
Filing Date: 2010-06-01
Classification: B64G

Abstract:
1. A compensator for reducing attitude errors in orientation of an instrument, the compensator comprising a transfer function module configured to operate on an input signal and, in response, provide a compensated output signal, the transfer function module coupled to an angular rate sensor for receiving, as the input signal, angular rates from the angular rate sensor, and the transfer function module coupled to the instrument for providing compensated angular rates as the compensated output signal, wherein the transfer function module operates in an open loop mode to reduce the attitude errors of the instrument, and operates free-of any feedback loop; an integrator coupled in parallel with the transfer function module for integrating the input signal and providing a non-compensated output signal, and a summer for combining the non-compensated output signal and the compensated output signal to form estimated attitude of the instrument; wherein the input signal includes angular rate errors due to rate sensor dynamics and data transmission latency, and the estimated attitude of the instrument includes less errors than the input signal.