Vehicle guidance system for guided missiles having adaptive trajectory bias

DETAILED DESCRIPTION What is claimed is: 1.
In a guided missile system of the type including a seeker for providing pitch and yaw rate control signals in response to a sensed relative target position and motion, an apparatus for providing a top attack trajectory to said missile comprising: means for generating line of sight angular rate pitch and yaw signals representing the relative angular position change between said missile and a target; a bias resolver connected to apply a bias signal to said pitch and yaw control signals for biasing said missile trajectory to provide a high impact angle with said target; and trigger means connected to sense a condition indicative of the geometric position of said missile with respect to said target, said trigger means connected to enable said resolver when said geometric position is favorable for a top attack trajectory whereby said missile trajectory is biased to provide an optimum attack angle.
2.
In a guided missile system of the type responding to a sensed relative target position and motion, said missile generating pitch and yaw rate control signals in response to detected pitch and yaw rate signals, apparatus for improving the attack angle of said missile comprising: a triggered bias detector for providing an enabling signal in response to a pitch line of sight rate signal which exceeds a predetermined level; a bias resolver for providing a pitch rate bias signal and yaw rate bias signal in response to said enabling signal; and means for combining said pitch rate bias signal and said yaw rate bias signal with respective of said pitch rate control signals and said yaw rate control signals whereby said guided missile trajectory is biased in response to a pitch rate signal which exceeds said predetermined level.
3.
The guided missile system of claim 2 wherein said predetermined level of line of sight rate is greater than minus one degree per second.
4.
The guided missile system of claim 2 wherein said means for combining comprises: a first summing network for combining said pitch rate bias signal with said pitch rate signal whereby said pitch control signal is formed; and, a second summing network for combining said yaw rate bias signal with said yaw rate signal to form said yaw control signal