Force balance model-based hemispherical resonant gyro digital control circuit

Abstract

The invention provides a force balance model-based hemispherical resonant gyro digital control circuit comprising a gyro meter header and the like, a first signal detection circuit and a second signal detection circuit are connected with the gyro meter header, a first analog-to-digital conversion circuit and the second signal detection circuit are connected, a second analog-to-digital conversion circuit and the first signal detection circuit are connected, a digital frequency tracking circuit and a digital amplitude control circuit are connected with the first analog-to-digital conversion circuit, a digital force feedback control circuit and a digital orthogonal control circuit are connected with the second analog-to-digital conversion circuit, the first analog-to-digital conversion circuit is connected between a first high voltage drive circuit and a digital amplitude control circuit, and the second analog-to-digital conversion circuit t is connected between a second high voltage drive circuit and a digital force feedback control circuit. The force balance model-based hemispherical resonant gyro digital control circuit can effectively improve the gyro control precision and stability, temperature environment changes have small impact on the digital control circuit precision, and the mass and volume of the control circuit can be reduced.

Description

technical field [0001] The invention relates to a digital control circuit, in particular to a hemispherical resonant gyroscope digital control circuit based on a force balance mode. Background technique [0002] The existing hemispherical resonant gyroscope and hemispherical resonant gyroscope combination for satellites mainly adopt full analog control or semi-digital control mode, and its control circuit performs signal reading, conditioning, demodulation and feedback control on the hemispherical gyroscope resonator through complex analog devices . Using analog or semi-digital methods to control hemispherical resonant gyroscopes has the following disadvantages: [0003] First, the control accuracy is low; due to the complexity of the hemispherical resonator gyro control method, a large number of analog devices are required to use the analog mode for demodulation control, and each analog device will introduce noise, which makes the system noisy. [0004] Second, the temper...

AI Technical Summary

Problems solved by technology

[0003] First, the control accuracy is low; due to the complex control method of the hemispherical resonator gyro, a large number of analog devices are required to use the analog mode for demodulation control, and each analog device will introduce noise, which makes the system noisy

[0004] Second, the temperature adaptability is poor; using the analog method to demodulate and control the signal of the hemispherical resonator, because each analog device will be affected by the temperature, the control effect is inconsistent at different temperatures, and it is easy to cause a large temperature drift in the system

[0005] Three, poor anti-interference ability; analog devices are easily affected by various factors other than temperature, such as electric field, magnetic field, etc., and crosstalk of analog signals is easy to occur in analog circuits, which affects the output of the gyro

[0006] Fourth, debugging and maintenance are difficult; the simulation system adjusts the key parameter values ​​of the system by adjusting the resistance and capacitance values. This adjustment method cannot cover all parameter values, which brings difficulties to debugging and maintenance.

[0007] Fifth, the design is complicated, the cycle is long and the flexibility is poor; the demodulation and feedback control of the gyro signal is realized by analog devices, the circuit design is relatively complicated, and the circuit function and performance verification needs to be verified by making an actual circuit, resulting in a long design cycle. If the system structure needs to be changed, it is necessary to re-design, manufacture and verify the circuit, and the flexibility is poor.

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