Accession Number : ADA332816

Title :   Terminal Guidance with a Side-Mounted Sensor against a Stationary Target.

Corporate Author : NAVAL SURFACE WARFARE CENTER DAHLGREN DIV VA

Personal Author(s) : Groves, G. W. ; Khodary, A.

PDF Url : ADA332816

Report Date : DEC 1997

Pagination or Media Count : 31

Abstract : Terminal guidance under the constraints that (i) the heading error must be greater than a specified angle (in order that the sensor see the target), and (ii) the magnitude of the lateral acceleration is limited, is studied. Only the kinematic features of flight are considered. It is demonstrated that a planar trajectory is as good as any for the purpose of hitting a stationary target on the ground. In order to hit, or come close to the target, the final segment of terminal flight must violate the heading-error constraint, during which time the target is invisible. If there is an additional condition (iii) that the missile must remain above the target (e.g., for imaging) during terminal descent, the optimum trajectory is a conic spiral. As in the previous case, there is a final segment of blind flight. The miss distance depends on the constraints and other parameters of the problem, as well as on the sensor measurement errors. Monte Carlo simulation was used to estimate the miss distance under various conditions.

Descriptors :   *GUIDED MISSILE TRAJECTORIES, *CONICAL SCANNING, *SIDE LOOKING DETECTORS, OPTIMIZATION, KALMAN FILTERING, MONTE CARLO METHOD, PLANAR STRUCTURES, ERRORS, TRAJECTORIES, TERMINAL GUIDANCE, VISUAL TARGETS, MISS DISTANCE.

Subject Categories : Guided Missile Traj, Accuracy and Ballistics
      Miscellaneous Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE