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Method and device for measuring navigation performance of MEMS (Micro Electro Mechanical System) inertial group

An inertial navigation and performance technology, which is applied in the field of inertial navigation and can solve the problem of high difficulty in measuring the performance of MEMS inertial group navigation.

Active Publication Date: 2019-01-11
HENGYANG ZHIGU TECH DEV CO LTD
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Problems solved by technology

[0003] Embodiments of the present invention provide a MEMS inertial group navigation performance measurement method and device to solve the problem of high operational difficulty in MEMS inertial group navigation performance measurement

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  • Method and device for measuring navigation performance of MEMS (Micro Electro Mechanical System) inertial group
  • Method and device for measuring navigation performance of MEMS (Micro Electro Mechanical System) inertial group
  • Method and device for measuring navigation performance of MEMS (Micro Electro Mechanical System) inertial group

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0049] see figure 1 , figure 1 It is a flow chart of a MEMS inertial navigation performance measurement method provided by an embodiment of the present invention, such as figure 1 shown, including the following steps:

[0050] Step 101, collecting the first output data of the MEMS inertial set at the initial position for a preset period of time for initial alignment, and obtaining an initial attitude matrix;

[0051]Step 102, collecting the second o...

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Abstract

The invention provides a method and device for measuring the navigation performance of an MEMS (Micro Electro Mechanical System) inertial group. The method comprises the following steps: collecting first output data of the MEMS inertial group standing at an initial position for preset time, and performing initial alignment, thereby obtaining an initial attitude matrix; collecting second output data output by an IMU (Inertial Measurement Unit) during a process that the MEMS inertial group translates from the initial position to a target position according to a preset locus; performing inertialnavigation resolving based on the initial attitude matrix and the second output data, thereby obtaining the locus and attitude measured by the IMU as well as speed at the target position; comparing the locus and attitude measured by the IMU as well as speed at the target position with refernece values, thereby obtaining error values, wherein the error values are measurement indexes for navigationperformance of the MEMS, the refernece values include a position reference, an IMU speed accuracy reference and an attitude measurement reference, the position reference is the actual length of the preset locus, the IMU speed accuracy reference is the zero speed in a static state, and the attitude measurement reference is the attitude of the MEMS inertial group at the initial position. The methodand the device can be used for reducing the difficulty in operation of measuring the navigation performance of the MEMS inertial group.

Description

technical field [0001] The invention relates to the technical field of inertial navigation, in particular to a MEMS (Micro-Electro-Mechanical System, Micro-Electro-Mechanical System) inertial group navigation performance measurement method and device. Background technique [0002] Inertial navigation provides real-time location, velocity, and attitude information for the carrier through dead reckoning. It is autonomous and concealed. It is widely used in vehicles, aircraft, ships, satellites and other fields. At the same time, higher and higher navigation accuracy is proposed. Require. For IMU (Inertial measurement unit, inertial measurement unit) navigation performance evaluation, the traditional method is sports car test, etc., and the operation is complicated. Therefore, in the prior art, it is difficult to measure the MEMS inertial navigation performance. Contents of the invention [0003] Embodiments of the present invention provide a MEMS inertial group navigation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 张春熹王心冉龙俊张若愚
Owner HENGYANG ZHIGU TECH DEV CO LTD
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