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Micro-inertial navigation gyroscope with multi-detection vibration units

A vibration unit and gyroscope technology, applied in the field of inertial navigation, can solve the problems of improving the mutual limitation of detection amplitude and low amplitude response gain, and achieve the advantages of improving the detection amplitude, widening the measurement frequency domain range, and canceling the common mode error. Effect

Inactive Publication Date: 2018-11-02
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology

However, comparing the amplitude-frequency response curves of the single-degree-of-freedom and two-degree-of-freedom excitation units, it can be found that the amplitude response gain of the two-degree-of-freedom vibration unit at the center frequency (usually set as the natural frequency of the single-degree-of-freedom excitation vibration unit under the same conditions) Much lower than the single degree of freedom vibration unit
[0010] The design of the existing technology cannot solve the problem of mutual limitation between obtaining a wider measurement frequency domain range and increasing the detection amplitude

Method used

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  • Micro-inertial navigation gyroscope with multi-detection vibration units
  • Micro-inertial navigation gyroscope with multi-detection vibration units
  • Micro-inertial navigation gyroscope with multi-detection vibration units

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Embodiment 1

[0044] Such as Figure 4 In the shown multi-detection vibration unit micro inertial navigation gyroscope, the structure of the gyroscope is designed as two sensitive vibration units up and down.

[0045] Located on the upper side is a two-degree-of-freedom vibration unit, which is composed of a first sensitive unit 3 , a second sensitive unit 4 and a transfer unit 5 . The bottom of the transfer unit 5 passes through a sensitive direction elastic suspension beam K in the y-axis direction 敏感7 13 is fixed at the anchor point, and the left and right sides of the transfer unit 5 pass through two excitation directions elastic suspension beams K in the x-axis direction 激励6 12 is fixedly connected with the second sensitive unit 4. The upper side and the lower side of the second sensitive unit 4 respectively pass through two sensitive direction spring structures K in the y-axis direction 敏感5 11 is fixedly connected to the first sensitive unit 3 , and the second sensitive unit 4 is c...

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Abstract

The invention discloses a micro-inertial navigation gyroscope with multi-detection vibration units. A 1-DOF (degree of freedom) vibration unit and a 2-DOF vibration unit are introduced into the gyroscope simultaneously to serve as a composite sensitive vibration unit, frequency in a bandwidth range is divided by difference and complementarity of amplitude-frequency response characteristics of the1-DOF vibration unit and the 2-DOF vibration unit in different frequency ranges, and output curve of the whole sensitive vibration unit is enabled to have better amplitude-frequency response characteristics. With adoption of the combined detection by selecting different vibration units in different frequency ranges, the defect of mutual restriction between bandwidth and output amplitude of a sensitive vibration unit in traditional microgyroscope design is overcome, and the multiple vibration units provide signals continuously, so that information redundancy and backup are provided for a data processing part of the gyroscope.

Description

technical field [0001] The invention belongs to the technical field of inertial navigation, and in particular relates to a micro-inertial navigation gyroscope with multiple detection vibration units. Background technique [0002] If an object performs angular motion while doing linear motion, it will produce Coriolis acceleration orthogonal to the direction of linear motion and angular velocity, and the magnitude of the acceleration is proportional to the linear motion velocity and angular velocity. It is the basic principle of the micro-inertial navigation gyroscope to reflect the angular velocity of a specific direction of the micro-inertial navigation gyroscope by reading the Coriolis acceleration. At present, the design of the micro inertial navigation gyroscope usually adopts the design of a single excitation vibration unit and a single sensitive vibration unit. This design has been widely used due to its good in-band gain in the past period of time. However, as users...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/5642G01C21/16
CPCG01C19/5642G01C21/16
Inventor 刘博李鹏程李津冉一航王淑君杨峰何中翔
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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