NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 37 of 2051
Parameter estimation for distributed parameter models of complex, flexible structures
Author and Affiliation:
Taylor, Lawrence W., Jr.(NASA Langley Research Center, Hampton, VA, United States)
Abstract: Distributed parameter modeling of structural dynamics has been limited to simple spacecraft configurations because of the difficulty of handling several distributed parameter systems linked at their boundaries. Although there is other computer software able to generate such models or complex, flexible spacecraft, unfortunately, neither is suitable for parameter estimation. Because of this limitation the computer software PDEMOD is being developed for the express purposes of modeling, control system analysis, parameter estimation and structure optimization. PDEMOD is capable of modeling complex, flexible spacecraft which consist of a three-dimensional network of flexible beams and rigid bodies. Each beam has bending (Bernoulli-Euler or Timoshenko) in two directions, torsion, and elongation degrees of freedom. The rigid bodies can be attached to the beam ends at any angle or body location. PDEMOD is also capable of performing parameter estimation based on matching experimental modal frequencies and static deflection test data. The underlying formulation and the results of using this approach for test data of the Mini-MAST truss will be discussed. The resulting accuracy of the parameter estimates when using such limited data can impact significantly the instrumentation requirements for on-orbit tests.
Publication Date: Jul 01, 1991
Document ID:
19930071799
(Acquired Dec 28, 1995)
Accession Number: 93A55796
Subject Category: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
Document Type: Preprint
Publication Information: 8 p.
Publisher Information: International Organization
Meeting Information: IFAC and IFORS, Symposium in Identification and System Parameter Estimation; 9th; July 8-12, 1991; Budapest; Hungary
Meeting Sponsor: 1FAC;
IFORS
Financial Sponsor: NASA; United States
Organization Source: NASA Langley Research Center; Hampton, VA, United States
Description: 8p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: COMPLEX SYSTEMS; DISTRIBUTED PARAMETER SYSTEMS; DYNAMIC STRUCTURAL ANALYSIS; FLEXIBLE SPACECRAFT; PARAMETER IDENTIFICATION; COMPUTER PROGRAMS; EQUATIONS OF MOTION; LONGERONS; PARTIAL DIFFERENTIAL EQUATIONS; SPACECRAFT CONFIGURATIONS; TRUSSES
Imprint And Other Notes: IFAC and IFORS, Symposium in Identification and System Parameter Estimation, 9th, Budapest, Hungary, July 8-12, 1991, Paper
Availability Source: Other Sources
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: August 19, 2011
Contact Us