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Method and system applicable to controlling wide-range gyroscopes

A control method and closed-loop control technology, applied in the field of MEMS sensors, can solve problems such as deterioration of accuracy and performance deterioration

Active Publication Date: 2017-01-04
BEIJING MXTRONICS CORP +1
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Problems solved by technology

In order to meet the requirements of wide range, it can be achieved by expanding the range of the gyroscope. However, blindly increasing the range will lead to deterioration of its performance in terms of noise and zero bias, and will even worsen its performance in small-range applications. precision

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  • Method and system applicable to controlling wide-range gyroscopes
  • Method and system applicable to controlling wide-range gyroscopes

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Embodiment Construction

[0031] The control method and control system suitable for a wide-range vibrating structure gyroscope according to the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

[0032] Cylindrical, hemispherical or planar ring gyroscopes made of metal or silicon materials have better working characteristics due to their structural symmetry.

[0033] The ring vibration gyroscope works in a typical cos2θ vibration mode, such as figure 1 shown. The mode in which the horizontal direction and the vertical direction are the radial axes in the ring plane is the first mode. When the gyroscope is perpendicular to the ring surface, there is an angular rate input, that is, when the gyroscope rotates around the plane, the Coriolis force generated The energy is coupled to the second mode where the first mode intersects at 45°, and the expression of the Coriolis force is:

[0034] Fc=2m*v*Ω APP

[0035] Among them, m is t...

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Abstract

The invention provides a method and a system applicable to controlling vibration-structure gyroscopes under wide-range application conditions. The method includes selecting set values V<0> of first-modal amplitude of the vibration-structure gyroscopes and using the set values V<0> as target amplitude of first modals during zero-angular-speed input; selecting angular speed thresholds omega; selecting different working modes according to the magnitudes of inputted angular speeds. The method and the system have the advantages that performance requirements during large-range work can be met without deterioration of precision during small-range application; requirements of diversified application fields on wide-range work can be met, and identical technical effects can be realized by the system for controlling the vibration-structure gyroscopes.

Description

technical field [0001] The invention belongs to the technical field of MEMS (Micro-Electro Mechanical System) sensors, and in particular relates to a control method and a control system of a micro-mechanical vibration structure gyroscope for detecting the angular velocity of an object. Background technique [0002] In recent years, with the continuous development of micromechanical technology, vibrating structure gyroscopes have been widely used, among which gyroscopes with tuning fork, cylindrical, hemispherical and ring structures made of ceramics, metals, and silicon materials are the main ones. The unity of these gyroscopes is that they need an external driving force to excite the vibrating structure to vibrate at its own natural resonance frequency (the first motion mode, also called the carrier mode), and when there is an angular rate input on the sensitive axis, The action of the Coriolis force is generated, so that the motion of the first mode is coupled out of the s...

Claims

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Application Information

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IPC IPC(8): G01C19/56
CPCG01C19/56
Inventor 朱红张奇荣权海洋叶泽刚王浩
Owner BEIJING MXTRONICS CORP
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