Design the Description Function of Guidance System with Velocity Pursuit Guidance Law

For the nonlinear problem of simple guided munitions guidance and control system,description function is adopted to design the velocity autopilot including three types of nonlinear sections.At the same time,to obtain a better design result,based on means of description function combining the optimization program of nonlinear equations,a new method for nonlinear guidance and control system design is proposed.With the simulation results it is affirmed that the given method is correct.