Collision-Geometry-Based Pulsed Guidance Law for Exoatmospheric Interception

摘要

A collision-course-based pulsed guidance law is proposed for planar exoatmospheric engagements. Nonlinear engagement geometry is considered for deriving the collision heading and hence the pulse width required to steer the interceptor on the collision course. The proposed law requires line-of-sight and interceptor parameters for implementation and is independent of time to go. It is shown, for a general pulsed guidance scenario, that pulses should be fired in quick succession for minimum divert acceleration and hence minimum divert velocity requirement. Simulations show superior miss distance and divert velocity requirement performance as compared with the ZEM-based guidance law. The results presented here are of a preliminary nature. Future work could include a dynamic model for the interceptor and a maneuvering target together with noisy measurements.