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Method for prolonging service life of inertia measurement unit

A technology of inertial measurement and gyroscope, which is applied in directions such as navigation through speed/acceleration measurement, and can solve the problems that the service life affects the accuracy of inertial measurement combined navigation

Inactive Publication Date: 2012-07-11
BEIJING MECHANICAL EQUIP INST
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for prolonging the service life of the inertial measurement combination, and solve the problem that the life of the gyroscope limits the service life of the inertial measurement combination and the drift of the gyro affects the accuracy of the inertial measurement combination navigation

Method used

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Embodiment Construction

[0025] The specific steps of a method for prolonging the service life of the inertial measurement combination are:

[0026] The first step is to build a dead reckoning system

[0027] The dead reckoning system includes: an inertial measurement combination, a gyro power-on trigger button and an odometer, wherein the inertial measurement combination includes: a control computer, a gyro, an accelerometer, a gyro control circuit, and a navigation calculation module. The function of the navigation calculation module is: calculate the heading and attitude of the inertial measurement combination through the data of the gyroscope and the accelerometer, and then calculate the position with the odometer data as the main information; the data interfaces of the gyroscope and the accelerometer are respectively connected with the navigation calculation The data interface of the module is connected, the control interface of the gyro is connected with the external control terminal of the gyro...

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Abstract

The invention discloses a method for prolonging the service life of an inertia measurement unit. The method is characterized in that gyro' original data is stored for 30-60 s under stationary state, a gyro control circuit is used to stop the gyro, and navigation operation is carried out by gyro' data which is previously stored and data of an accelerometer; under dynamic state, the gyro control circuit triggers the gyro to work, and the navigation operation is carried out by gyro' real time data and the data of the accelerometer. According to the invention, by staged usage of the gyro, the service life of the inertia measurement unit is prolonged, and simultaneously the navigation error caused by gyro drifting is prevented. The method has simple and convenient operation, and brings convenience to the actual utilization.

Description

technical field [0001] The invention relates to a method for prolonging the service life, in particular to a method for prolonging the service life of an inertial measurement combination. Background technique [0002] The gyroscope is the key and vulnerable part of the inertial measurement combination. At present, the service life of the mechanical gyroscope is only a few hundred hours, while the service life of other components in the inertial measurement combination is far more than a few hundred hours. After the gyro fails, the inertial measurement combination needs to be replaced. , after hundreds of hours, the inertial measurement unit needs to be disassembled from its mounting platform carrier, and transported back to the laboratory to replace the gyroscope. At the same time, if the gyro is powered on for a long time, the gyro drift will be the main error source of the inertial measurement integrated navigation accuracy. [0003] At present, in order to extend the ser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/16
Inventor 葛晓飞叶航李梅
Owner BEIJING MECHANICAL EQUIP INST
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