Test Methods For High Order Error Model Coefficients Of Inertial Instrument On Precision Centrifuge

Precision Centrifuge as a commonly used inertial navigation test equipment under high overload conditions,it is possible to provide sufficient input for the inertial meter,especially in the high-order error model coefficient calibration experiment of the inertia meter,which is sufficient to calibrate the inertia The instrument error model factor provides the device conditions.However,in the process of calibrating the inertia meter by the centrifuge,the error of the centrifuge itself will affect the calibration accuracy of the error model coefficient,and the influence of some high-order error model coefficients is often larger.Therefore,in the use of centrifuges to calibrate the inertia meter at the same time need to consider the centrifuge itself for the calibration results on the impact of the error.Based on the JML-I boomed precision centrifuge developed by Harbin Institute of Technology,this paper analyzes the influence of the error of each centrifuge on the calibration accuracy of the error model coefficients.The main research on quartz accelerometer and gyroscope Calibration Method of Highorder Error Model Coefficient of Accelerometer.The main contents of the thesis are as follows:The JM-I precision centrifuge is used as the research object,and the error source of each link is analyzed.Finally,the calculation method of the total uncertainty of the centrifuge is given.Based on this analysis,the main error sources of the input force of the centrifuge in the process of providing the centroid acceleration are analyzed,and the influence of the error source on the input acceleration of the accelerometer is given.By using the homogeneous transformation,the errors are transmitted,and the calculation formula of the input force and the angular velocity of the accelerometer is given under the influence of the error.The foundation of the test of the accuracy of the inertia instrument calibration and the error compensation method is put forward.The calibration method of the quartz accelerometer on the centrifuge was studied.The accurate input force of the accelerometer on the accelerometer calculated by the error model of the quartz accelerometer and the error analysis of the centrifuge error was used to calculate the input force of the accelerometer accurately Based on the calibration of the zero bias and the scale factor,the test method of the 12 kinds of installation position of the accelerometer on the centrifuge is put forward.By using the method of least square identification,the centrifuge error and the acceleration to be recognized The error coefficient of the error model is improved without improving the performance index of the precision centrifuge,and the validity of the method is verified by simulation.At the same time,combined with the analysis of the centrifuge error term for the accelerometer high order coefficient of the impact of the size of the error,the actual test error compensation to improve the calibration accuracy to lay the foundation.The calibration method of the higher order error model of the gyro accelerometer is studied on the JML-I centrifuge,and the relevant error analysis is carried out.Based on the kinetic equation of the gyro accelerometer,the calibration model of the complete gyro accelerometer error is given,and the error model is simplified from the practical application point of view.Using the JML-I centrifuge reversal platform function,the experimental method is used to calibrate the high-order error model coefficient of the gyro accelerometer,and the error compensation is carried out.The validity of the test method is verified by analyzing the calibration accuracy and simulation.