Accession Number : ADA297174

Title :   The Design of Neural Controller for Flexible Multibody Systems.

Descriptive Note : Final rept. Oct-Dec 94,

Corporate Author : NEW MEXICO UNIV ALBUQUERQUE DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Yen, Gary G. ; Kwak, Moon K.

PDF Url : ADA297174

Report Date : MAR 1995

Pagination or Media Count : 43

Abstract : A distributive neural control system is advocated for flexible multibody structures. The proposed neural controller is designed to achieve trajectory slewing of structural member as well as vibration suppression for precision pointing capability. The motivation to support such an innovation is to pursue a real time implementation of a robust and fault tolerant structural controller. The proposed control architecture which takes advantage of the geometric distribution of piezoceramic sensors and actuators has provided a tremendous freedom from computation complexity. In the spirit of model reference adaptive control, we utilize adaptive time delay radial basis function networks as a building block to allow the neural network to function as an indirect closed loop controller. The horizon of one predictive controllers cooperatively regulates the dynamics of the nonlinear structure to follow the prespecified reference models asymptotically. The proposed control strategy is validated in the experimental facility, called the Planar Articulating Control Experiment which consists of a two link flexible planar structure constrained to move over a granite table. This paper addresses the theoretical foundation of the architecture and demonstrates its applicability via a realistic structural test bed.

Descriptors :   *ROBOTICS, *NEURAL NETS, *SPACE SYSTEMS, CONTROL, FUNCTIONS, TIME INTERVALS, VIBRATION, CONTROL SYSTEMS, TEST BEDS, ADAPTIVE CONTROL SYSTEMS, COMPUTATIONS, DETECTORS, MODELS, REAL TIME, DISTRIBUTION, DYNAMICS, STRUCTURAL PROPERTIES, MODULAR CONSTRUCTION, GRANITE, CERAMIC MATERIALS, NONLINEAR SYSTEMS, PIEZOELECTRIC MATERIALS, PRECISION, TOLERANCE, ADAPTIVE SYSTEMS, DELAY, GEOMETRY, TABLES(DATA), ACTUATORS, AIMING, ARCHITECTURE, TRAJECTORIES, SLEWING, BODIES, CLOSED LOOP SYSTEMS, FLEXIBLE STRUCTURES, STRUCTURAL COMPONENTS, FAULTS.

Subject Categories : Cybernetics
      Astronautics

Distribution Statement : APPROVED FOR PUBLIC RELEASE