Research On Two-dimensional Trajectory Correction Control Method And Ballistic Solution

In recent years,with the continuous development of science and technology,the form of modern warfare has also changed.Information-based operations and precisionguided strikes have become the trend of modern warfare.Precision-guided strikes have not only improved combat efficiency,but also reduced casualties against non-enemy targets.Compared with missiles and traditional ammunition,two-dimensional correction technology not only improves the accuracy of artillery strikes,but also greatly reduces the cost of guided munitions.Therefore,countries around the world pay more and more attention to two-dimensional correction technology.By consulting relevant information and understanding the development status of ballistic correction technology at home and abroad,and according to the principle of twodimensional correction technology,a control strategy for two-dimensional correction is formulated,and the correction device is divided into control actuators and correction control systems according to functions section.The cross fixed duck rudder is used as the correction mechanism to realize the correction of the projectile.A modified permanent magnet motor that controls the rotation of the fixed duck rudder is designed.Through the analysis of the forces and moments produced by the projectile and the steering gear during the flight,the projectile’s ballistic equation is derived,and the actual trajectory and deviation parameters are calculated in real time based on the projectile’s pose information.The theoretical trajectory is calculated by the ballistic equation to achieve the projectile’s The trajectory is always disturbed near the theoretical ballistic trajectory.Designed and built a two-dimensional correction control system.The method of geomagnetic detection of projectile rotation speed is analyzed,the combination of geomagnetism and photoelectric encoder is used to measure the projectile attitude,the motor control method based on PWM is compiled,the configuration of each drive module of DSP is completed,and the modified prototype is successfully built.A detailed experimental method is proposed for the semi-physical simulation test experiment.The code disk test experiment,the fixed angle repair stop experiment,the motor torque test experiment,the PWM value change test experiment under different conditions are carried out respectively,and finally the correction test experiment is carried out on the modified prototype.Improve and optimize the correction system through experiments.The final experimental results show that the two-dimensional correction device designed this time has a certain correction effect,and the stopping angle error of the steering gear is basically controlled within 5°,which meets the expected requirements and has certain practical value.