Method for calibrating inertial platform system gyroscope torquer coefficient

Abstract

The invention provides a system for calibrating an inertial platform system gyroscope torquer coefficient. The inertial platform system is placed on a placing pedestal, power is on till work is normal, and rotation of a platform body is carried out, so that a calibrated gyroscope is in a vertical position; a platform body horizontal axis is accurately locked and controlled according to a horizontal direction frame angle; start time of a positive direction torque applied to the gyroscope and a negative torque applied to the direction gyroscope is recorded, and stop time of a positive direction torque applied to the gyroscope and a negative torque applied to the direction gyroscope is recorded. The coefficient is obtained by calculating vertical direction framework angle sensor pole pairs. The calibrating method reduces requirements on unlevelness of the platform system placing pedestal, and improves calibrating precision of the torquer coefficient.

Description

technical field [0001] The invention relates to a method for calibrating coefficients of a gyro torquer in an inertial platform system, which can be used in calibrating the coefficients of a gyroscope torquer in a missile or weapon platform system, and belongs to the field of inertial platform system calibration. Background technique [0002] The inertial platform system generally consists of three gyroscopes, and each gyroscope contains a gyroscope torquer. The error coefficient of the inertial platform system needs to be calibrated before the missile or weapon system is launched. The gyroscope calibration generally adopts the force feedback method. The method needs to calibrate the coefficient of the gyroscope torquer first, the calibration accuracy of the gyroscope torquer affects the calibration accuracy of the platform system, and then affects the accuracy of the missile or weapon system landing point. [0003] The current method for calibrating the coefficients of the ...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: ① When the base of the inertial platform system is not level, the measured value of the frame angle in the vertical direction cannot correctly reflect the rotation angle of the vertical gyroscope, which will cause a calibration error of the torque device, and the level of the base of the platform system in the calibration environment will not be correct. Higher degree requirements (angle classification)

②The frame angle sensor adopts a dual-channel multi-pole resolver, which has harmonic errors. Due to the different rotation angles of forward and reverse torques, harmonic errors will lead to torque device calibration errors

Images