Study on noise enhancement injection in laser gyroscopes based on random noise variation rates

College of Big Data and Information Engineering, Guizhou University - Guizhou 550025, China

^(a) E-mail: jjma3@gzu.edu.cn; 1750891491@qq.com (corresponding author)

Received: 12 June 2023
Accepted: 11 September 2023

Abstract

In the process of injecting random noise into a mechanical vibration laser gyroscope, the amplitude of the injected noise decays significantly as the noise frequency increases. To address this phenomenon, theoretical research was conducted on the transfer function of random noise in a mechanical vibration laser gyroscope, and a transfer function of random noise enhancement injection efficiency was established, which is related to the damping coefficient and resonant frequency. A method for enhancing random noise injection efficiency based on the rate of random noise level variation was proposed, and a circuit system for random noise enhancement injection in mechanical vibration laser gyroscopes was designed. The results showed that compared with the original random noise injection technology, random noise enhancement injection technology can effectively suppress the serious attenuation of high-frequency random noise amplitude, increase random noise injection efficiency by about 41.27%, reduce the random walk of the laser gyroscope's angle by about 17.73%, and improve its accuracy by about 27.02%. Random noise enhancement injection technology provides an important reference for improving the performance of mechanical vibration laser gyroscopes.