Quartz flexible accelerometer temperature error calibration compensation method

Abstract

The invention relates to the field of testing technologies and instruments and particularly relates to a quartz flexible accelerometer temperature error calibration compensation method. Through carrying out eight-position calibration on a quartz flexible accelerometer at a room temperature and carrying out multiple groups of temperature-changing experiments on the quartz flexible accelerometer ina temperature box, output and temperature data of the accelerometer are obtained; an accelerometer temperature model method is then adopted to obtain a function relationship between the output of thequartz flexible accelerometer and the temperature; a back-stepping method and item-by-item differential processing are then adopted to obtain n-1 groups of item-by-item differential data results; a robust regression estimation method is finally adopted to obtain a function of a scale factor with respect to temperature; a function of zero bias with respect to temperature is then obtained; and a quartz flexible accelerometer output temperature error calibration compensation model is finally obtained. The cost can be effectively saved, and through a differential robust regression idea, a mutationpoint can be eliminated effectively and the high compensation accuracy can be obtained.

Description

technical field [0001] The invention relates to the fields of testing technology and instruments, in particular to a temperature error calibration compensation method for a quartz flexible accelerometer. Background technique [0002] Because in the traditional method for temperature error compensation of the quartz flexible accelerometer, the turntable with temperature control function, that is, the temperature control turntable, is often used to calibrate the accelerometer and obtain the temperature error model of the accelerometer. [0003] However, in the current practical application, the use cost of the temperature control turntable is relatively high, and the application range is narrower than that of the independent thermostat and turntable, and the output value of the accelerometer will appear certain or abnormal due to circuit interference and other reasons during the temperature change process. For some mutation points, the least squares method has poor tolerance. ...

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Problems solved by technology

[0003] However, in the current practical application, the use cost of the temperature control turntable is relatively high, and the application range is narrower than that of the independent thermostat and turntable, and the output value of the accelerometer will appear certain or abnormal due to circuit interference and other reasons during the temperature change process. For some mutation points, the least squares method has poor tolerance. In this case, using the least squares method for incompletely preprocessed data will cause the estimated function to deviate.

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