Time-division driving and orthogonal force feedback closed-loop quartz gyroscope error suppression method

A technology of error suppression and time-division driving, which is applied in the direction of gyro effect for speed measurement, gyro/steering sensing equipment, measuring devices, etc., to achieve the effect of eliminating gyro zero drift, simple engineering implementation, and eliminating DC offset
CN113607150APending Publication Date: 2021-11-05BEIJING INSTITUTE OF TECHNOLOGYGY
5 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2021-11-05

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a time-division driving and orthogonal force feedback closed-loop quartz gyroscope error suppression method and belongs to the technical field of micromechanical inertial devices. The method comprises the following steps that 1) a drive software unit and a drive module output time-division sine drive excitation signals, and alternately output the sine drive excitation signals and zero level signals in adjacent time periods; 2) when the driving excitation signal is in a signal-free period, a detection module starts to perform signal detection to obtain an in-phase component and an orthogonal component of a detection signal; (3) in-phase and orthogonal signal PI closed-loop control is established, in-phase and orthogonal force feedback closed-loop signals are generated respectively, and force feedback closed-loop signals are generated through digital-to-analog conversion; and 4) a force feedback signal is loaded to a detection end of a quartz tuning fork for force feedback closed-loop control so that displacement of the detection end of the quartz tuning fork is zero. According to the method, an electrostatic coupling error and a mechanical coupling error of the gyroscope are suppressed, the zero drift of the gyroscope is effectively improved, and the circuit is easy to implement.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a time-division driving and orthogonal force feedback closed-loop quartz gyroscope error suppression method, which belongs to the technical field of micromechanical inertial devices. Background technique

[0002] A gyroscope is an inertial sensitive device used to measure the rotational angular velocity of an object relative to inertial space. Due to its small size, light weight, low power consumption, low cost, and easy mass production, the micromechanical gyroscope is an important development direction in the gyroscope field and has received extensive attention.

[0003] Quartz tuning fork gyroscope is a typical representative of micromechanical gyroscope. Its working principle is the piezoelectric / inverse piezoelectric effect and Coriolis effect of quartz crystal, including driving and detecting two pairs of tuning forks. Driving electrodes are designed and manufactured on the driving tuning fork, and testing tuning fork Th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More