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: 118
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: 2025
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(.): inertial navigation system, laser gyroscope, system analysis, Allan variation, noise characteristics
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(.): In the article presented results of research of noise characteristics and systematic errors of the dither laser gyroscope. The object of research is a dither laser gyroscope with a four-mirror ring resonator perimeter of 28cm and a helium-neon active medium, generating linearly polarized radiation at a wavelength of 633nm. The purpose of the work was assessment of noise characteristics and systematic errors of the laser gyroscope model LGV-1 for determining its suitability as a precision measurer of angular velocities as part of inertial measurement units and autonomous navigation systems. Analysis of noises conducted by the method of Allan variations according to records of data on angular velocity, measured by the laser gyroscope during long time of continuous operation in unstabilized environmental conditions. Determined coefficients of dominant noises of the output signal of the laser gyroscope: quantization noise 0,11'', angle random walk 0,0048/h1/2, zero-bias instability 0,0017/h. The resulting error of angular velocity measurement at averaging time of 100s amounted to 0,0042/h, which corresponds to the navigation class of accuracy and is comparable with the serial gyroscope model LGK-400. Revealed the key source of systematic error of the studied laser gyroscope. This is trend and instability of the zero signal, related to the operation of the dither, causing deformation of the monoblock and changing the perimeter of the ring laser resonator. The results of the research demonstrate the prospects of using laser gyroscopes model LGV-1 in autonomous inertial navigation systems. Further improvement of accuracy and reliability of the studied gyroscope requires optimization of the dither design, as well as development of compensation algorithms for its influence on the stability of the perimeter of the ring laser resonator.
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