Error analysis in frequency domain for fiber optic gyro attitude reference and control system

Wenqi Wu; Libin Zhu; Mingming Jiang; Zhouhui Tuo

doi:10.1117/12.522345

2 September 2003 Error analysis in frequency domain for fiber optic gyro attitude reference and control system

Wenqi Wu, Libin Zhu, Mingming Jiang, Zhouhui Tuo

Proceedings Volume 5253, Fifth International Symposium on Instrumentation and Control Technology; (2003) https://doi.org/10.1117/12.522345
Event: Fifth International Symposium on Instrumentation and Control Technology, 2003, Beijing, China

Abstract

A shipboard attitude reference and control system using fiber optic gyros is analyzed. In this system, the frequency character of the attitude error is more concerned, because high frequency attitude measuring errors can some times cause vibration in control system. In this paper, system kinematic model using quaternion is addressed and stabilization analysis based on Lyapunov theory is presented. By time-frequency distribution analysis, it is pointed out that the key problem is how to confine the high frequency body attitude errors and angular velocity errors measured by the fiber optic gyros. Lowpass filter is imposed to solve this problem. In this way, while the high frequency attitude vibrations are restrained, the body attitude error would become larger. Frequency domain confinement and time domain confinement to the system errors should be balanced in practical engineering.

Citation Download Citation

Wenqi Wu, Libin Zhu, Mingming Jiang, and Zhouhui Tuo "Error analysis in frequency domain for fiber optic gyro attitude reference and control system", Proc. SPIE 5253, Fifth International Symposium on Instrumentation and Control Technology, (2 September 2003); https://doi.org/10.1117/12.522345

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