Timoshenko Beam Modeling for Parameter Estimation of NASA Mini-Mast Truss

[+] Author and Article Information
Ji Yao Shen, Jen-Kuang Huang

Dept. of Mech. Engrg. and Mech., Old Dominion University, Norfolk, VA 23529-0247

L. W. Taylor

Guidance and Control Div., NASA Langley Research Center, Hampton, VA 23665

J. Vib. Acoust 115(1), 19-24 (Jan 01, 1993) (6 pages) doi:10.1115/1.2930308 History: Received March 01, 1991; Online June 17, 2008


In this paper a distributed parameter model for the estimation of modal characteristics of NASA Mini-Mast truss is proposed. A closed-form solution of the Timoshenko beam equation, for a uniform cantilevered beam with two concentrated masses, is derived so that the procedure and the computational effort for the estimation of modal characteristics are improved. A maximum likelihood estimator for the Timoshenko beam model is also developed. The resulting estimates from test data by using Timoshenko beam model are found to be comparable to those derived from other approaches.

Copyright © 1993 by The American Society of Mechanical Engineers
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