Prediction Technology On High Speed Missile Flight Attitude Imaging To Ground

Information warfare puts forward higher requirements for precision strike,and the accurate exploration and recognition of targets is an important link of precision strike.With the development of war and technology,target image recognition has become a major concern in the future.Different from static imaging,when the projectile is flying at high speed,it is affected by the environment(air flow,altitude,temperature,etc.),and the motion attitude is changing dynamically.It is difficult to obtain a clear image of a specific target in real time.In this paper,the technical idea of the combination of missile borne camera and movable mirror surface is proposed.According to the projectile attitude,the imaging angle of the movable mirror surface is quickly adjusted to realize the fixed-point tracking imaging of the ground target.The robust square root traceless Kalman filter is used to solve the problem of projectile attitude prediction and provide input information for the imaging angle control.In order to solve the problem of clear and stable mirror imaging,after carefully studying and deriving the unscented Kalman filter(UKF)algorithm,the UKF algorithm is improved,and an unscented Kalman filter algorithm based on robust square root is proposed to predict the attitude(pitch angle)and external trajectory of the projectile within the shutter time.The algorithm can predict the flight attitude and external trajectory of the projectile in a complex flight environment,According to the prediction results,the mirror is adjusted by the motor to make the target image stable in the mirror and complete the capture.A large number of sample data are obtained through Datcom and MATLAB / Simulink modeling and simulation.Based on the flight characteristics of the projectile,the projectile motion model is designed and analyzed,and the prediction algorithm is combined with the motion model.Finally,through the simulation experiment,the predicted values of projectile attitude angle and external trajectory within the shutter time are obtained.The error between the predicted value and the real value is ideal,and the projectile position and attitude prediction can be realized.