Research on convergence and divergence of trajectory of proportional navigation guidance law with signal of gimbal angle

With the concept of variable coefficient, the convergence and divergence of the missile's trajectory adopting the proportional navigation guidance law containing the signal of gimbal angle was studied. The effects of the signal of gimbal angle on the convergence and divergence of the missile's trajectory and on missile's attack angle were discussed. Simulation results show that adopting the guidance law missile can get larger impact angle under the condition of the convergent trajectory, if the proportion of the signal of gimbal angle is set reasonably.