Rapid oscillation starting system and method for metal resonator gyroscope

Abstract

The invention relates to a rapid oscillation starting system and method for a metal resonator gyroscope. The rapid oscillation starting method is technically characterized by comprising the following steps that: a frequency sweeping module is used for carrying out sweeping frequency of a harmonic oscillator; an analog-to-digital conversion module AD collects an excitation signal and an amplitude detection signal generated by the harmonic oscillator, and then transmits the digital quantity of the excitation signal and the digital quantity of the amplitude detection; signal to an FPGA main control chip. the FPGA main control chip processes the excitation signal and the amplitude detection signal and outputs a new excitation signal; and a digital-to-analog conversion module DA converts the new excitation signal into an analog signal, and the analog excitation signal is filtered by a low-pass filter and then acts on the harmonic oscillator. According to the invention, the design is reasonable, the rapid and stable oscillation starting function of the metal resonant gyroscope under the condition of large-range frequency change can be realized, and the reliability of the gyroscope is improved.

Description

technical field [0001] The invention belongs to the technical field of inertial instrument control, and relates to a metal resonant gyroscope force feedback working mode, in particular to a metal resonant gyroscope fast start-up system and method. Background technique [0002] Metal resonant gyroscope is a solid wave gyroscope with simple structure, long life, high reliability and short start-up time, which has broad application prospects in the field of inertial navigation. The core sensitive element of the metal resonant gyroscope is the resonant oscillator. Due to factors such as structure, processing, and materials, the resonant frequency of the resonant oscillator is usually different. [0003] The resonator is essentially a band-pass filter with frequency-selective characteristics. The input signal can pass through the resonator only when it is near the resonant frequency of the resonator, and a 90° phase delay will be generated after the input signal passes through. ...

AI Technical Summary

Problems solved by technology

However, when the resonant frequency of each resonator has a large difference, it is necessary to expand the frequency sweep range or modify the digital circuit program. If the frequency sweep range is expanded, the frequency sweep time will become longer, resulting in the metal resonator gyroscope not being able to quickly enter a stable working state. The digital circuit program causes a lot of inconvenience to the post-test and other work, which restricts the engineering of the gyroscope.

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