Modal estimates for the physical parameters of a programmable structure

Daniel J. Inman; James P. Calamita

doi:10.1117/12.174212

1 May 1994 Modal estimates for the physical parameters of a programmable structure

Daniel J. Inman, James P. Calamita

Proceedings Volume 2192, Smart Structures and Materials 1994: Mathematics and Control in Smart Structures; (1994) https://doi.org/10.1117/12.174212
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

This work considers the limits of modal analysis based identification of the coefficients on a partial differential equation model of a programmable structure. The programmable structure considered here consists of a cantilevered beam with embedded self sensing piezoceramic actuators and surface mounted control module. A Euler Bernoulli beam model is used as the basic equation of motion. This model is modified to include internal (strain rate) and external (linear viscous) damping mechanisms. In order to model the effects of the embedded piezoceramic as well as the control module, the modulus (EI), density, and damping coefficients are modeled as piecewise constant. An assumed mode approximation is used with off diagonal terms neglected. This numerical approach is then used along with measured frequencies and damping ratios to estimate the various damping and stiffness coefficients. The consistency of the estimates is compared with increasing mode number and the limitations of the procedure are discussed.

Citation Download Citation

Daniel J. Inman and James P. Calamita "Modal estimates for the physical parameters of a programmable structure", Proc. SPIE 2192, Smart Structures and Materials 1994: Mathematics and Control in Smart Structures, (1 May 1994); https://doi.org/10.1117/12.174212

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available