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Record 1 of 30964
Static shape control for flexible structures
Author and Affiliation:
Rodriguez, G.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Scheid, R. E., Jr.(California Institute of Technology, Jet Propulsion Laboratory, Pasadena, United States)
Abstract: An integrated methodology is described for defining static shape control laws for large flexible structures. The techniques include modeling, identifying and estimating the control laws of distributed systems characterized in terms of infinite dimensional state and parameter spaces. The models are expressed as interconnected elliptic partial differential equations governing a range of static loads, with the capability of analyzing electromagnetic fields around antenna systems. A second-order analysis is carried out for statistical errors, and model parameters are determined by maximizing an appropriate defined likelihood functional which adjusts the model to observational data. The parameter estimates are derived from the conditional mean of the observational data, resulting in a least squares superposition of shape functions obtained from the structural model.
Publication Date: Oct 01, 1986
Document ID:
19870045384
(Acquired Nov 28, 1995)
Accession Number: 87A32658
Subject Category: CYBERNETICS
Report/Patent Number: SAE PAPER 861822
Document Type: Preprint
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: 16p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CONTROL CONFIGURED VEHICLES; FLEXIBLE BODIES; LARGE SPACE STRUCTURES; SHAPE CONTROL; SPACETENNAS; DISTRIBUTED PARAMETER SYSTEMS; MAXIMUM LIKELIHOOD ESTIMATES; PARAMETER IDENTIFICATION; PARTIAL DIFFERENTIAL EQUATIONS; WHITE NOISE
Imprint And Other Notes: SAE, Aerospace Technology Conference and Exposition, Long Beach, CA, Oct. 13-16, 1986. 16 p. NASA-supported research.
Availability Source: Other Sources
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