A real-time identification method for coupling error coefficients of a micro-machined gyroscope based on quadrature demodulation
By using orthogonal demodulation technology to identify the coupling error coefficient of the micromechanical gyroscope in real time, the problem of non-real-time measurement of coupling error coefficient in the existing technology is solved, and real-time error compensation of the gyroscope under different working conditions is realized, thereby improving the stability and performance of the gyroscope.
CN116592912BActive Publication Date: 2026-06-12ZHEJIANG UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG UNIV
- Filing Date
- 2023-04-17
- Publication Date
- 2026-06-12
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Figure CN116592912B_ABST
Abstract
The application discloses a real-time identification method of coupling error coefficient of a micro-mechanical gyroscope based on quadrature demodulation, and comprises the following steps: realizing closed-loop control of the micro-mechanical gyroscope based on PLL, AGC and force balance; acquiring amplitude and phase information of a resonant micro-mechanical gyroscope vibration signal based on quadrature demodulation; obtaining IQ separated phases of a driving mode and a detection mode based on a rotary table forward and reverse rotation detection method; acquiring a scale factor based on gyroscope calibration by using a rotary table; and obtaining the coupling error coefficient by solving equations according to the IQ separated phases and the quadrature demodulation results at other selected phases. The application can acquire information of the coupling error coefficient of the gyroscope in a working state of the gyroscope, and is of great significance for studying real-time error compensation of the gyroscope and temperature characteristics of the zero bias and the scale factor.
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