Nonlinear Algorithm for Flight Trajectory Tracking

To make the flight vehicle track the curved trajectory precisely,a 3D nonlinear guidance command with output of accelleration was designed.The point on scheme trajectory was chosen as the reference point.Using the position coordinate and velocity of flight vehicle,nonlinear overload guidance command by which the flight vehicle tracked the curved trajectory was proposed.The method of choosing reference point was analyzed in aspect of time domain.The simulation result shows that the guidance order can make the guided projectile track the trajectory precisely.