Abstract
MEMS-IMU is internally integrated with three-axis gyroscope and three-axis accelerometer, which are used to measure the angular velocity and acceleration information of the stabilized platform in three-dimensional space, respectively. With these information, attitude angle, velocity, displacement and other information can be obtained, and then the photoelectric stabilized platform can be controlled to ensure the stability of the optical axis in the inertial space. Because the gyro and accelerometer have certain error problems such as zero deviation, scale factor and orthogonality coupling, which will cause large errors to the measured results, this paper analyzes the error sources, establishes a deterministic error model, selects appropriate mathematical methods, determines the physical quantities to be measured and collects experimental data, so as to obtain the unknown coefficients in the model, The output angular velocity and acceleration error after calibration meet the control error accuracy requirements of the stable platform.
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