Polarization sensor and MEMS integrated navigation technology

MEMS have been the hotspot in inertial measurements applications recently due to their advantages of low-cost, high reliability, micro size, etc. But MEMS cannot be used in initial alignment alone because of its drift and noise. Since bionic polarization navigation sensor's errors are not divergent, it can restrain the divergence if polarization navigation sensor and MEMS become an integrated navigation system. Experiments are made which show that the data of polarization navigation sensor are not divergent, and the yaw angles provided by polarization navigation sensor can be used to accomplish the initial alignment. In navigational state, an odometer can be used to provide horizontal velocity and form an integrated navigation system with MEMS and the polarization navigation sensor, in which the velocity drifts can be effectively suppressed through the compensation of Kalman filter.