Accession Number : ADA294031
Title : A Hierarchical Fuzzy Controller for Beam Rider Guidance with a Forbidden Zone.
Descriptive Note : Final rept.,
Corporate Author : NAVAL UNDERSEA WARFARE CENTER NEWPORT DIV RI
Personal Author(s) : Bessacini, A. F. ; Pinkos, R. F.
PDF Url : ADA294031
Report Date : 07 MAR 1995
Pagination or Media Count : 36
Abstract : Beam rider guidance is a well understood strategy wherein the goal is to maintain a vehicle on a trajectory such that its bearing and the bearing of the contact being pursued coincide. The problem of automatic, external control of an underwater vehicle such that it obeys a beam rider guidance law while remaining outside a region defined relative to a time-varying measurement is addressed herein. The approach uses fuzzy set theory to develop a hierarchical controller that deals with multiple competing goals and determines the necessary commands to be sent over a two-way communication link between the launching platform and the vehicle being guided. Control of the vehicle entails the use of a time-varying data input stream from the launching platform sensor. The controller is implemented in a simulation to demonstrate and analyze performance.
Descriptors : *UNDERWATER VEHICLES, *FUZZY SETS, *BEAM RIDER TRAJECTORIES, DATA PROCESSING, INPUT, CONTROL, SIMULATION, MEASUREMENT, DETECTORS, TIME, VARIATIONS, PLATFORMS, COMMUNICATIONS NETWORKS, LAUNCHING, SYSTEMS APPROACH, GUIDANCE, EXTERNAL, VEHICLES, HIERARCHIES, TRAJECTORIES, SET THEORY, TWO WAY TRANSMISSION.
Subject Categories : Theoretical Mathematics
Underwater and Marine Navigation and Guidance
Distribution Statement : APPROVED FOR PUBLIC RELEASE