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Temperature error compensation method during MEMS inertial measurement unit cold start

An inertial measurement unit, temperature error technology, applied in the direction of navigation through velocity/acceleration measurement, navigation calculation tools, etc., can solve problems such as high sensitivity to temperature change

Inactive Publication Date: 2014-07-23
HARBIN ENG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] At present, the production process of MEMS accelerometer is the same as that of MEMS gyroscope, there are still unresolved problems, and its sensitivity to temperature changes is large

Method used

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  • Temperature error compensation method during MEMS inertial measurement unit cold start
  • Temperature error compensation method during MEMS inertial measurement unit cold start
  • Temperature error compensation method during MEMS inertial measurement unit cold start

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Embodiment Construction

[0058] The present invention will be further described below in conjunction with accompanying drawing:

[0059] The present invention aims at the situation that the zero drift of the inertial device and the scale factor are greatly changed by the influence of temperature. The present invention proposes an improved temperature compensation model, and designs a set of simple, reasonable and effective temperature compensation workflow. The parameters of the temperature compensation model are obtained through combination, so that the MEMS inertial measurement unit shortens the preparation time and quickly enters the working state. The specific workflow is as follows:

[0060] 1. Select the temperature error compensation model

[0061] The improved temperature error compensation (temperature compensation) model of the present invention is obtained in the following manner:

[0062] Taking the MEMS accelerometer as an example, the simplified form of the static mathematical model of...

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Abstract

The invention belongs to the field of inertial device error compensation, and specifically relates to a temperature error compensation method during MEMS inertial measurement unit cold start. The temperature error compensation method comprises: (1) selecting a temperature error compensation model, collecting temperature compensation data, pre-treating the temperature compensation data, optimizing temperature compensation error model parameters, and carrying out temperature compensation. According to the present invention, the improved temperature error compensation model and the corresponding, simple and easy performing work process are provided based on the gyro and the accelerometer in the MEMS inertial devices; and when the MEMS inertial measurement unit being subjected to temperature compensation is subjected to cold start, the influence of the temperature increase and the external temperature change is low, such that the preparing time of the MEMS inertial measurement unit is substantially shortened, and the speedability of the MEMS inertial measurement unit as the navigation system is increased.

Description

technical field [0001] The invention belongs to the field of error compensation of inertial devices, and in particular relates to a method for compensating a temperature error of a MEMS inertial measurement unit during cold start. Background technique [0002] Micro-Electronic Mechanical System-MEMS (Micro Electronic Mechanical System-MEMS), also referred to as MEMS, is a new generation of micro-electromechanical devices processed by nanotechnology. It takes silicon semiconductor material as the processing object, adopts special integrated circuit manufacturing technology to process micro-devices with driving, control and signal processing functions on the order of millimeters. A MEMS inertial measurement unit is an inertial measurement device that includes a three-axis MEMS gyroscope and a three-axis MEMS accelerometer, where the three axes of the gyroscope and the accelerometer are perpendicular to each other and comply with the right-hand rule. Given that MEMS has the ad...

Claims

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Application Information

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IPC IPC(8): G01C21/16
CPCG01C21/18G01C21/20
Inventor 何昆鹏韩继韬曾建辉周雪梅于文浩王兴彬单飞王晨阳胡守雷王志强
Owner HARBIN ENG UNIV
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