A new two-position analytic alignment algorithm for SINS

Haigang Xu; Yanhong Lu

doi:10.1117/12.718039

30 October 2006 A new two-position analytic alignment algorithm for SINS

Haigang Xu, Yanhong Lu

Proceedings Volume 6358, Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation; 63582X (2006) https://doi.org/10.1117/12.718039
Event: Sixth International Symposium on Instrumentation and Control Technology, 2006, Beijing, China

Abstract

A 2-position analytic alignment method for strapdown inertial navigation system (SINS) is developed to overcome the limit on precision in analytic alignment on stationary base, which mainly comes from the performance of inertial measurement unit (IMU). IMU is successively rest at two positions by rotating the vehicle to measure the earth's rotation rate and gravity, and measurement at one position is subtracted from the other to eliminate constant error of IMU to improve alignment precision. Transformation matrix between two vehicle reference frames is calculated using output of gyros during the vehicle's rotation. An improved method for estimating gesture matrix is developed to avoid matrix nonreversibility. Error analysis is performed to determine the available precision which is demonstrated by computer simulation.

Citation Download Citation

Haigang Xu and Yanhong Lu "A new two-position analytic alignment algorithm for SINS", Proc. SPIE 6358, Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation, 63582X (30 October 2006); https://doi.org/10.1117/12.718039

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