Correction Filter for Mechanically Dithered Single-Axis Ring Laser Gyros
https://doi.org/10.17285/0869-7035.2016.24.2.041-055
Abstract
A correction filter for mechanically dithered single-axis ring laser gyros (RLG) is proposed. The filter is intended to determine the angular position of a strapdown inertial navigation system (SINS) in the RLG sensitivity axis using the known value of the RLG angular position with respect to inertial space, taking into account the models of the suspension elastic forces nonlinearity, the hysteresis model of oscillation energy dissipation, and the model of the suspension piezoceramic drive. Parameterized models of nonlinearity, dissipation, and the output characteristic of the suspension piezoceramic drive have been developed. A method for finding nonlinearity parameters of elastic forces using a set of experimental amplitude-frequency characteristics (AFC) is proposed. Numerical simulation of the AFCs of the notch elliptic and correction filters under sinusoidal rotation of the SINS with the amplitude of 1 arcmin in the frequency band of 80–3600 Hz has been performed. The efficiency of the proposed filter has been verified experimentally under pulse action on SINS; the test results are discussed. Comparison of the experimental and calculated data shows the adequacy of the proposed models and satisfactory operation of the correction digital filter.
About the Authors
B. V. Klimkovich
Scientific Production Limited Liability Company OKB TSP, Minsk
Belarus
Belarus
A. M. Tolochko
Scientific Production Limited Liability Company OKB TSP, Minsk
Belarus
Belarus
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Review
For citations:
Klimkovich B.V., Tolochko A.M. Correction Filter for Mechanically Dithered Single-Axis Ring Laser Gyros. Giroskopiya i Navigatsiya. 2016;24(2):41-55. (In Russ.) https://doi.org/10.17285/0869-7035.2016.24.2.041-055
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