REDUCED-ORDER KALMAN FILTER FOR ALIGNMENT

Abstract
The use of a full-order Kalman filter for the alignment process of an inertial navigation system (INS) imposes an unacceptable burden on computers. In this paper we intend to design and analyze a low-order Kalman filter for the initial alignment of a ring laser gyro strapdown inertial system that results in a substantially lighter computer burden with a little significant reduction in system accuracy.