초록 ▼

A maneuver detector and processing method for use in target trackers employed in weapon guidance systems, and the like, that employs multidimensional measurements and a set of inertial coordinate systems. The maneuver detector and processing method are implemented as follows. Time-delayed target pos

A maneuver detector and processing method for use in target trackers employed in weapon guidance systems, and the like, that employs multidimensional measurements and a set of inertial coordinate systems. The maneuver detector and processing method are implemented as follows. Time-delayed target position and velocity estimates of the target are maintained in a history file. These estimates are continuously updated, in that they are transformed 24 into intermediate north, east, down (NED) range Cartesian coordinate systems by correcting for aircraft motion. For each measurement time, the histories are used to predict the position and velocity of the target in an “observation-relative”inertial coordinate system aligned with the line-of-sight to the target. The error between the prediction and observation is calculated and used with the measurement accuracies to calculate a maneuver probability.

대표청구항 ▼

A maneuver detection method for use in a target tracking system disposed in a vehicle that is employed to detect a maneuvering target, said method comprising the steps of: determining time-delayed target position and velocity estimates of a moving target and storing the time-delayed target position

A maneuver detection method for use in a target tracking system disposed in a vehicle that is employed to detect a maneuvering target, said method comprising the steps of: determining time-delayed target position and velocity estimates of a moving target and storing the time-delayed target position and velocity estimates in a history file; continuously updating the time-delayed target position and velocity estimates by transforming them into an intermediate Cartesian coordinate system and correcting for motion of the vehicle; for each measurement time, processing the updated time-delayed target position and velocity estimates to predict the position and velocity of the target in an observation-relative inertial coordinate system aligned with the line-of-sight between the aircraft and the target; calculating an error between the predicted position and velocity of the target and the current observed position and velocity of the target; and calculating a maneuver probability that is indicative of whether the target is maneuvering using the error and predetermined measurement accuracies of the target tracking system.