Circuit system of micro-electromechanical hybrid gyroscope based on FPGA

Abstract

The invention discloses a circuit system of a micro-electromechanical hybrid gyroscope. Capacitance signals outputted by the micro-electromechanical hybrid gyroscope pass a differential amplifier and a band-pass filter of a front interface; the signals then pass an analog-to-digital converter, a digital demodulator, a filter, and a decoupling module; the signals are then converted into analogue signals through a digital-to-analog converter. The analogue signals are transformed into feedback voltages through an amplifier; the feedback voltages are superposed with carrier waves and pre-load voltages, and act on a feedback torquer of the micro-electromechanical hybrid gyroscope, such that a rebalance loop is formed. A silicon micro-gyroscope peripheral signal processing circuit realized by analogue signals has the defects of complicated structure, poor flexibility, noise, temperature drift, and the like. With the system provided by the invention, the defects are overcome. The invention provides a micro-electromechanical hybrid gyroscope circuit system which is simple and feasible, and is advantaged in good stability and good portability.

Description

technical field [0001] The invention relates to a circuit system of a dynamic tuning gyroscope, in particular to a closed-loop detection circuit system of a micro-electromechanical hybrid gyroscope based on FPGA. Background technique [0002] The gyroscope is one of the important components of the inertial navigation and guidance system, and it is a device used to measure the rotation angle or angular velocity of an object relative to the inertial space. Gyroscopes have the characteristics of autonomous navigation, so they are widely used in navigation, aviation, aerospace and other fields. With the development of science and technology, gyroscopes are also widely used in mining, oil exploration, ocean development and other fields. [0003] The micromechanical hybrid gyro drive motor drives the gyro rotor to rotate at high speed through the drive shaft and torsion bar. The structure of the torsion bar can ensure that when the gyroscope has a speed perpendicular to the driv...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In view of the problems and deficiencies in the above-mentioned prior art, the purpose of the present invention is to overcome the complex structure, poor flexibility, noise and temperature drift of the peripheral signal processing circuit of the silicon micro-gyroscope realized by the analog circuit, and provide a simple and easy The circuit system of MEMS hybrid gyroscope with good stability and strong portability

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