Influence of Digital Temperature Control Circuit on Starting Time

This article aims to address the issue of slow zero-point oscillation during the start-up process of a gyroscope, which significantly affects the weapon's rapid response capability. The study examines the impact of digital temperature control circuit PWM wave amplitude and frequency on startup time. During practical testing of the gyroscope, it was discovered that changes in the PWM duty cycle during the start-up process can cause unstable data output from the gyroscope in the first few minutes of start-up, ultimately resulting in longer start-up times. When investigating the impact of PWM wave amplitude on start-up time, first, MATLAB was used to superimpose the duty cycle changing PWM wave with the demodulated signal. After changing the amplitude of the PWM wave, it was found that PWM waves with different amplitudes had varying effects on the demodulated signal. Furthermore, by incorporating PWM waves with different amplitudes into the closed-loop fiber optic gyroscope simulation model built using MATLAB, it was discovered that reducing the amplitude of the PWM wave can weaken the impact of the duty cycle variation on the gyroscope output. Finally, experimental verification showed that reducing the amplitude of the PWM wave shortened the start-up time of the gyroscope by 16%. In addition, when investigating the impact of PWM wave frequency on start-up time, it was found that by fixing the frequency of the PWM wave in the digital temperature control circuit and changing the intrinsic frequency of the gyroscope, the start-up time of the gyroscope was reduced by 30% when the intrinsic frequency of the gyroscope was offset from the frequency of the PWM wave.