Abstract: Methods and devices for estimating and controlling the orientation of a drogue relative to air mass motion where method and apparatus embodiments incorporate estimation of angle of attack and sideslip and function to correct the direction of a drogue so as to maintain a desired angle of attack and sideslip. Some of the exemplary estimation techniques apply methods of sensor output fusion.

Abstract: Methods and devices for estimating and controlling the orientation of a drogue relative to air mass motion where method and apparatus embodiments incorporate estimation of angle of attack and sideslip and function to correct the direction of a vehicle so as to maintain a desired angle of attack and sideslip. Some of the exemplary estimation techniques apply methods of sensor output fusion.

Abstract: A system, processing structure and method for performing vehicle intercept includes target acceleration estimation or blocking via a filter prior to deriving an interceptor acceleration time history via a guidance law. In the processing structure where the unknown target accelerations are blocked from affecting estimates, a guidance law is generated, stored and retrieved accounting for worst case target acceleration. In the processing structure where the target acceleration is presumed constant with a constant bank angle, the guidance law is closed form, exploiting constant heading angular velocity, and thus generated online.