Design of a 3-D modified proportional navigation guidance law

This paper intends to develop a terminal guidance law against very high speed targets. Traditionally, proportional navigation guidance (PNG) is mostly effective for interceptors and targets with ideal dynamics and constant speeds during the collision course, however, which is non-robust for two objects with non-constant speeds and non-ideal dynamics. To overcome the weakness, the interceptor considered is guided by a 3-dimensional (3-D) modified proportional navigation guidance (MPNG) law which is developed to account for the interceptor's axial acceleration. The guidance law is applicable to interceptors with thrust vector control to provide lateral accelerations. Engagement performance of the proposed design is verified by numerical simulation.