Midcourse Sliding-Moding Guidance for Air-to-Air Missile on Helicopter with Intercept Angle

A midcourse virtual target-based guidance was proposed to be applied for air-to-air missile on helicopter. First,the virtual target-based vertical trajectory programming technology was put forward to settle the long range low-altitude flight collision and the ground clutter abatement in the course of handover of guidance from the midcourse the terminal. Second,the miss distance between the missile and the virtual target which was derived by a new method were chosen as sliding mode and then the sliding mode control theory was employed to design the guidance law. Finally,representative simulation with MATLAB( Simulink) results and their analysis show preliminarily that the new guidance not only meets the requirement,but also converges quickly compared with the optimal guidance law. Furthermore this midcourse guidance law is easy to realize in engineering.