A dithered Coriolis acceleration sensor system has a proof mass that is free of feedback in the accelerometer servo loop at the dither frequency by totally notching out all feedback torque at this frequency. The proof mass relative motion is then a direct measure of the rate because there is no feedback...http://www.google.fr/patents/US6324909?utm_source=gb-gplus-shareBrevet US6324909 - Signal processing system for inertial sensor
