Study On Trajectory Prediction Technology For Controllable Projectiles

To Large-caliber Trajectory Correction Projectile, in order to realize its ballistic deflection correction and trajectory control timely, it’s necessary to predict the ballistic and the impact point accurately and rapidly through the real-time measured ballistic data. In this paper, from trajectory parameters identification, trajectory prediction technique is researched based on the measured data.The ballistic model parameter error is the main affection of the trajectory calculation accuracy. According to a section of real-time measured ballistic data, aerodynamic parameters more consistent with the true value can be identified by using Inter-cell constant method and Kalman filter method. Measurement data coordinate transformation, meteorological data processing, aerodynamic parameter estimation, ballistic parameter identification and trajectory calculation has been built And applying the real-time identified aerodynamic parameters to modify the parameters in ballistic model on line can work out the subsequent trajectory of high precision and predict the impact point.The simulation takes a GPS measured projectile flight test data for example, by selecting the projectile rising segment data, the trajectory prediction process is established. Then, use two methods to make the simulation. The result shows that the trajectory prediction method based on parameter identification with high generality, rapidity and accuracy can provide a basis for ballistic deflection correction and trajectory control.