Base Motion Isolation Algorithm for Rate Biased RLG North Finder with Disturbances

摘要：

A base motion isolation algorithm is proposed for a rate biased RLG (Ring Laser Gyro) north finder subjected to vehicle disturbances. A single-axis rotation modulation scheme is used. Furthermore, the angular increment of the rotation of the turn table is utilized to compute the outputs of the third virtual gyroscope, by which the north finder consist of two gyroscopes and three accelerometers are translated into a Strapdown Inertial Navigation System (SINS) consist of three gyroscopes (two real and one virtual) and three accelerometers. Therefore, the north-finding problem is translated into an initial alignment problem based on a Kalman filter. The experiments results show that the new algorithm can effectively avoid the influences of vehicle disturbances. The 20min north finding accuracy of azimuth angle is better than 1 when the weather is gusty, the vehicle is rocking and the motor is running on.

关键词： rate biased RLG north finder virtual gyroscope base motion isolation algorithm

作者: Chu Minsheng Wu Wenqi Zhang Yan Zhao Xiqing

作者单位: College of Mechatronics and Automation,National University of Defense Technology,Changsha 410073,Chi College of Continuing Education,National University of Defense Technology,Changsha 410073,China

会议类型: 国际会议

会议名称: 2011 10th International Conference on Electronic Measurement & Instruments(第十届电子测量与仪器国际会议 ICEMI2011)

会议地点: 成都

会议语种:英文

页码: 316-320

在线出版日期: 2011-08-16（万方平台首次上网日期，不代表论文的发表时间）