Method for determining output value of quartz accelerometer of inertial platform system

A technology of accelerometer and inertial platform, which is applied in the field of determining the output value of quartz accelerometer in inertial platform system, can solve the problems that the theoretical value cannot be fully interpreted, and achieve the effect of wide applicability and accurate calculation method

Active Publication Date: 2018-12-18
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

Therefore, when calculating the output value of the quartz accelerometer, the traditional calculation method of the output value of the quartz accelerometer does not include the above-mentioned error items, and cannot fully interpret the accurate theoretical value of the actual quartz accelerometer.

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  • Method for determining output value of quartz accelerometer of inertial platform system
  • Method for determining output value of quartz accelerometer of inertial platform system
  • Method for determining output value of quartz accelerometer of inertial platform system

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0032] The invention provides a method for calculating the output value of the quartz accelerometer of the inertial platform system, which is used for calculating the output value of the quartz accelerometer of the platform system.

[0033] Such as figure 1 The transformation relationship between the carrier coordinate system and the geographic coordinate system is shown. When the carrier coordinate system does not coincide with the geographic coordinate system, there is a mutual transformation relationship between the two coordinate systems. In space, the transformation of the carrier coordinate system relative to the geographic coordinate system can be obtained by three rotations around the axis. For the first time, the geographic coordinate system is rotated by β angle around the Y axis, and the geographic coordinate system is divided by OX...

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Abstract

The invention provides a method for determining an output value of a quartz accelerometer of an inertial platform system. The method comprises the following steps: 1, measuring an initial alignment angle between a geographic coordinate system and a carrier coordinate system of the inertial platform system; 2, measuring rotation angles of a platform body axis, an inner frame axis and an outer frameaxis of the inertial platform system; 3, giving each of the error coefficient values of the quartz accelerometer; and 4, taking each of the error coefficient values into an output value calculation formula of the quartz accelerometer to obtain an output value of the quartz accelerometer. The method takes each of the known error coefficients of the quartz accelerometer into a new output value calculation formula of the quartz accelerometer for calculation to obtain the output value of the quartz accelerometer. Compared to the traditional calculation method, the method provided by the inventioncomprehensively considers the influence of the platform system errors and the quartz meter's own instrument errors on the output value of the quartz accelerometer, which makes the output value of thequartz accelerometer more accurate, provides convenience for the error compensation for the quartz accelerometer, and is wide in applications.

Description

technical field [0001] The invention relates to the technical field of inertial measurement, in particular to a method for determining the output value of a quartz accelerometer of an inertial platform system, which is mainly used in the aerospace field of inertial system error calibration. Background technique [0002] In the inertial platform system, the calculation method of the inertial device, such as the output value of the quartz accelerometer, determines the accuracy of the residual error between the actual quartz accelerometer output measurement value and the theoretical calculation value, and the accuracy of the residual value of the quartz accelerometer is directly It affects the compensation of inertial devices and the final navigation accuracy. Therefore, a comprehensive and accurate calculation method for the output value of the quartz accelerometer is very important for the calibration and compensation of the navigation system. [0003] The traditional calcul...

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 魏宗康高荣荣
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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