Accession Number : ADA195500

Title :   Theory of Filtering and Control with Application to Control of Large Space Structures.

Descriptive Note : Final rept. 1 Sep 83-31 Aug 87,

Corporate Author : CALIFORNIA UNIV LOS ANGELES

Personal Author(s) : Balakrishnan, A V

PDF Url : ADA195500

Report Date : 30 Mar 1988

Pagination or Media Count : 8

Abstract : This report summarizes accomplishments under a grant to study modeling. Identification, and control of flexible structures and to study random fields with applications to laser beam distortion in a turbulent field. Research in flexible structures focused on deriving continuum models base upon partial differential equations and derived methods for the solution of the resulting boundary control problems. A robust controller for stabilization based upon the abstract Hilbert-space semigroup formulation was derived as was a stochastic control theory for partial differential equations. A white noise theory for random fields was derived which has applications to laser beam propagation in the atmosphere; in particular, it is used to model the turbulent field.

Descriptors :   *DISTORTION, *FLEXIBLE STRUCTURES, *SPACECRAFT, *DYNAMIC LOADS, BOUNDARY VALUE PROBLEMS, CONTROL, CONTROL THEORY, FILTERS, LASER BEAMS, LIGHT TRANSMISSION, MODELS, PARTIAL DIFFERENTIAL EQUATIONS, STOCHASTIC CONTROL, THEORY, TURBULENCE, WHITE NOISE, CONTINUUM MECHANICS, HILBERT SPACE

Subject Categories : Unmanned Spacecraft
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE