Flight body trajectory control method based on drop point prediction and virtual tracking

Abstract

The invention provides a flight body trajectory control method based on drop point prediction and virtual tracking so as to realize accurate control of a flight body with relatively weak control capability under relatively large trajectory deviation. According to the method, theoretical landing points Xt and Zt and residual flight time Tt of a flight body are predicted according to ballistic parameters in actual flight, and position deviations X and Z of the theoretical landing points and a target point are calculated. According to the estimated drop point deviation and the flight time, the longitudinal X / Tt and the lateral deviation Z / Tt which need to be eliminated per second are calculated, feedback control is formed according to the real-time position (Xf, Zf) and the scheme trajectory position (Xp, Zp) of the flight body and the longitudinal XTi / Tt and the lateral deviation ZTi / Tt which need to be eliminated at the corresponding moment in the flight process, the flight body is controlled to gradually eliminate the trajectory deviation, and the trajectory deviation of the flight body is eliminated. And taking the deviation between the predicted drop point and the target point as a final control index, approaching the target point, and realizing accurate strike on the target.

Description

technical field [0001] The invention belongs to the technical field of flight control, in particular to a high-precision ballistic control method for guided artillery shells and guided rockets fired by barrels with weak control ability. Background technique [0002] Guided artillery shells and guided rockets are important development directions in the field of modern weapons. Because of their fast firing rate, flexibility, large amount of ammunition, and all-weather combat, they are still extremely important in modern warfare, especially in modern military struggles. Its unique role, but under the new situation and new environment, higher requirements are also placed on the combat performance of artillery and rockets, which require further development in range, accuracy and power. [0003] Improving the firing accuracy is the focus of the development of guided artillery shells and guided rockets. The flight control system is the key to achieving high-precision strikes, and t...

AI Technical Summary

Problems solved by technology

The flight control algorithms commonly used in guided projectiles and guided rockets are classic PID control and sliding mode control, robust control, intelligent control and other control theories and methods. These general control algorithms are often combined with methods such as project trajectory tracking and proportional guidance. In order to achieve precise strikes on the target, trajectory tracking is carried out by calculating the real-time position deviation corresponding to the trajectory of the flying object and the projected trajectory. It is necessary for the flying object to provide greater control capabilities to achieve high-precision projected trajectory tracking. The rocket's flight control ability is weak and contradictory, and with the continuous increase of its range, the trajectory deviation at the moment of control is also gradually increasing. If the flight control system cannot coordinate the problem between the large trajectory deviation and the small control ability, will greatly affect the guidance and control accuracy of such flying objects

[0004] In the literature at home and abroad, there is still a lack of targeted research on how to achieve precise control of such flying objects with weak control capabilities and large control deviations, especially with the development of guided projectiles and guided rockets to ultra-long range, the The trajectory deviation caused by medium disturbance is getting bigger and bigger, but the requirements for flight stability and control precision are higher, and this research will become more urgent

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