Apparatus for eliminating full-strapdown seeker guidance loop calibrated scale coefficient error, and method thereof

Abstract

The invention discloses an apparatus for eliminating a full-strapdown seeker guidance loop calibrated scale coefficient error, and a method thereof. The apparatus comprises an input module, a filtering module, an assessment module and a compensation module, a forced dither signal is superposed on overload instruction information through the input module, a projectile body forward channel and an attitude gyro compensation channel extract a line-of-sight rate signal and a projectile body attitude angle rate signal from signals filtered through the filtering module, the assessment module is used to establish a state equation, a measurement equation and a Kalman filtering equation, the estimation value of the calibrated scale coefficient error is assessed and calculated through the Kalman filtering equation, the compensation module multiplies the estimation value of the calibrated scale coefficient error with the projectile body attitude angle rate information and the multiplied compensation information is input to projectile body disturbance-containing inertial line-of-sight angular rate information in order to complete the compensation of the calibrated scale coefficient error, eliminate the influences of the calibrated scale coefficient error on a guidance loop, substantially improve the guidance precision and reduce the off-target amount.

Description

technical field [0001] The invention relates to a device and method for eliminating scale coefficient errors of a strapdown seeker in the field of missile guidance, in particular to a device and method for eliminating scale coefficient errors of a full strapdown seeker guidance loop. Background technique [0002] The seeker technology is the key technology in the precision guided weapon system. The performance of the seeker directly affects the combat effect of the precision guided weapon. With the gradual development of detector manufacturing technology and imaging seeker technology, the seeker The instantaneous field of view has increased to the extent that the gimbal bracket can be removed, and the strapdown seeker and its homing guidance technology have emerged as the times require. The strapdown seeker is fixed on the projectile body. After removing the gimbal bracket, the strapdown seeker The strapdown seeker is small in size, light in weight, and cheap in price. Judgi...

AI Technical Summary

Problems solved by technology

It will not only affect the effective navigation ratio, but also cause potential instability of the guidance system and reduce the guidance accuracy

At present, there are few good solutions to the problem of the scale coefficient error of the strapdown seeker

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