Accession Number : ADD018736

Title :   Hierarchical Fuzzy Controller for Beam Rider Guidance

Descriptive Note : Patent, filed 6 Jul 95, patented 23 Sep 97

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

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

Report Date : 23 Sep 1997

Pagination or Media Count : 27

Abstract : A beam rider guidance system for directing a steerable object such as a torpedo. 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 membership functions of different sensed variable membership function sets based upon primary and secondary goals to become fuzzy inputs to a controller that produces fuzzy output 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 some-times competing goals of excluding the torpedo from a particular operating zone while guiding the torpedo in response to a bearing through that operating zone. 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 :   *BEAM STEERING, *GUIDANCE COMPUTERS, *BEAM RIDER TRAJECTORIES, *PATENTS, *TORPEDO TRAJECTORIES, ADAPTIVE CONTROL SYSTEMS, CONTROL THEORY, MILITARY TACTICS, LAUNCH VEHICLES, COMMAND GUIDANCE, FUZZY LOGIC

Subject Categories : Computer Hardware
      Underwater and Marine Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE