Method and system for obtaining line-of-sight angular rate of projectiles applied to strapdown seekers

Abstract

The invention discloses a method and a system for acquiring the line-of-sight rate of a projectile applied to a strapdown seeker. In the method, the line-of-sight angle of the projectile can be accurately tracked through repeated iterations under the condition that only the line-of-sight angle of the projectile is provided. Specifically, by setting a reasonable iterative formula and calculation coefficient, iteratively obtains a value close to the real angular rate of the bullet line of sight in a very short period of time, which can be used to replace the required value when the subsequent calculation needs to be overloaded. The angular velocity of the projectile line of sight.

Description

technical field [0001] The invention relates to the control field of strapdown guided munitions, in particular to a method and a system for acquiring the line-of-sight angular velocity of the projectile. Background technique [0002] In the existing technology, in order to meet the objective needs of saving ammunition space, increasing the amount of charge, and reducing weight, etc., the ammunition-borne platform is cancelled, and the method of strap-down guidance is used for guidance control. Therefore, this guidance control ammunition requires However, due to cost constraints and changes in the battlefield environment (temperature, humidity), the scale coefficient of the missile-borne sensor will fluctuate, that is, the angular rate gyro scale coefficient and the detector scale coefficient Changes occur, resulting in a mismatch between the angular rate gyro scale coefficient and the detector scale coefficient, resulting in incomplete decoupling of bullet-to-eye line-of-sig...

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, in order to meet the objective needs of saving ammunition space, increasing the amount of charge, and reducing weight, etc., the ammunition-borne platform is cancelled, and the method of strap-down guidance is used for guidance control. Therefore, this guidance control ammunition requires However, due to cost constraints and changes in the battlefield environment (temperature, humidity), the scale coefficient of the missile-borne sensor will fluctuate, that is, the angular rate gyro scale coefficient and the detector scale coefficient Changes occur, resulting in a mismatch between the angular rate gyro scale coefficients and the detector scale coefficients, resulting in incomplete decoupling of the line-of-sight information

Moreover, the cost of the angular rate gyro is relatively high. If possible, everyone hopes to remove the high-cost and low-reliability detection components such as the angular rate gyro, simplify the components carried on the ammunition to the greatest extent, and complete the project with a low-cost and high-performance solution. Design and manufacture of ammunition;

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