Estimation enhancement by imposing a relative intercept angle for defending missiles

A multiple-body interception scenario is considered, where an evading target aircraft launches two defending missiles as a countermeasure against an incoming homing missile. The defenders share their respective line of sight angle measurements, are aware of the target’s evasion strategy, and exploit a cooperate guidance law which can impose a relative intercept angle between them. The ability of the proposed cooperative guidance-estimation scheme to protect the targeted aircraft is analyzed. Especially, the effect of different values of the commanded relative intercept angle on the intertwined guidance-estimation performance is studied.