Accession Number : ADD018053

Title :   Hierarchical Target Intercept Fuzzy Controller with Forbidden Zone.

Descriptive Note : Patent Application, Filed 1 Apr 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bessacini, Anthony F ; Pinkos, Robert F

PDF Url : ADD018053

Report Date : 01 Apr 1996

Pagination or Media Count : 43

Abstract : A target intercept guidance system for directing a steerable object, such as a torpedo with a guidance point. The guidance system is located at a launching vehicle and senses the bearings from the launching vehicle to a target and to the steerable object as it moves toward the target. Various error signals are then generated and classified into sensed linguistic variables using membership functions of corresponding sensed variable membership function sets based upon primary and secondary goals to become fuzzy inputs that produce fuzzy control output membership functions from a control output membership function set based upon logical manipulation of the fuzzy inputs. The control system performs this classification and selection according to sometimes competing goals of excluding the torpedo from a particular operating zone while guiding the torpedo in response to variations in a target bearing relative to the guidance point. The selected fuzzy control output membership functions are converted into an output having an appropriate form for control, subject to optional conditioning to prevent unwanted effects and assure good behavior for different tactical parameters.

Descriptors :   *PATENT APPLICATIONS, *COMMAND GUIDANCE, STEERING, CONTROL SYSTEMS, TORPEDOES, INTERCEPTION, BEARING(DIRECTION), ERRORS, GUIDANCE, MILITARY TACTICS, INTERCEPT TRAJECTORIES, TORPEDO TRAJECTORIES

Subject Categories : Underwater and Marine Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE