Patent ID: 8134103
Filing Date: 2012-03-13
Classification: F41G,F41H,G01S

Abstract:
1. A method for estimating staging of a boosting target, said method comprising the steps of: sensing position of the boosting target from moment to moment to thereby generate target position information; generating current stage state estimates including position, velocity, time index error de{circumflex over (l)}T into a thrust acceleration template, and motor scale factor {circumflex over (K)}; determining estimated burnout time t where stageTimeCurrent=nominal current stage burnout time; stageTimePast=nominal past stage burnout time; stageTimePastEst=estimated value of the previous stage burnout time; {circumflex over (K)} and de{circumflex over (l)}T=state estimates from the filter; offsetError=initial difference between template_index and measured Time; and using said estimated burnout time to predict a future location of said target.