A.O. Sinelnikov1, A.A. Ushanov2, N.V. Tikhmenev3, P.S. Romanov4

1 Peoples' Friendship University of Russia (RUDN University) (Moscow, Russia)
1–4 JSC «State Research Institute of Instrument Engineering» (GosNIIP) (Moscow, Russia)
1 sinelnikov-ao@rudn.ru, 2 a.a.ushanov@mail.ru, 3 nik-tikhmenev@yandex.ru, 4 romanov_p7274@mail.ru

Ring laser gyroscopes are widely used in high-precision inertial navigation systems due to their high sensitivity and stability of output parameters. However, the effectiveness of the mechanical dither mechanism, employed to overcome the frequency lock-in effect of counter-propagating waves in the resonator, is significantly reduced under external vibrations. Vertical oscillations of the resonator monoblock lead to suppression of the operating torsional vibration amplitude of the dither spring, causing nonlinearity in the output characteristic of the ring laser gyroscope and increased measurement error.

This study aims to analyze the influence of the resonator vertical mechanical vibrations on the dynamics and accuracy characteristics of a ring laser gyroscope with a mechanical dither, as well as to identify the mechanisms of intermode interactions that disrupt its operation.

Using finite element modeling and experimental research, it was established that resonant vertical oscillations of the resonator monoblock at frequencies above 300 Hz can suppress the torsional vibration amplitude of the dither spring by up to 30% and increase the random error of angular velocity measurement by up to 4 times. Spectral analysis of the signals confirmed the presence of beats between vibration modes, which causes modulation of the dither amplitude and temporary exit of the gyroscope from its operational mode.

The identified patterns justify the need to increase the resonator monoblock mounting rigidity to shift parasitic modes beyond the operating frequency range. The obtained data can be used to optimize ring laser gyroscope design and develop algorithms for digital compensation of vibration-induced errors, which is critically important for ensuring the reliability of autonomous navigation systems in aerospace, marine navigation, and other high-tech and knowledge-intensive fields.

Sinelnikov A.O., Ushanov A.A., Tikhmenev N.V., Romanov P.S. Influence of vertical vibrations on the ring laser gyroscope functioning // Achievements of modern radioelectronics. 2026. V. 80. № 6. P. 36–45. DOI: https://doi.org/10.18127/j20700784-202606-03

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