Effects of Closing Speed Uncertainty on Optimal Guidance,
NAVAL WEAPONS CENTER CHINA LAKE CA
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An idealized planar intercept is analyzed in which an air-to-air homing missile has angular measurements of the line of sight to a randomly maneuvering target and seeks to use a guidance law which optimizes a specific performance criterion. If the closing speed were known precisely, the optimal guidance law for this case would be proportional navigation with a certain navigation gain. There is uncertainty in the closing speed, however, because of the target maneuvers and lack of range measurements. The effect of this uncertainty on the optimal guidance law is to increase the nominal value of the navigation gain, and apparently to add a rapid weaving component if the fractional uncertainty in the inverse target range exceeds a certain level.
- Air Navigation and Guidance
- Guided Missile Trajectories, Accuracy and Ballistics