Dynamic Characteristic Identification

  • Clay JordanEmail author
  • Tommy Hazelwood
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)


This paper introduces a dynamic system parameter extraction approach using experimental data and a known characteristic equation for a single degree of freedom mass-spring-damper system. The efficacy of curve fitting to determine mass, damping, and stiffness for simulated underdamped, critically damped, and overdamped systems is explored. Two methods are investigated to obtain these characteristics for simulated systems; a step response approach in the time domain and a transfer function and dynamic stiffness approach in the frequency domain. Commonly available software, MATLAB, is used for curve fitting. An examination of the effect of inaccurate seeds, or starting values, for mass, damping, and stiffness is included.


Dynamic stiffness Step response Curve fitting MATLAB System analysis 


  1. 1.
    Palm III, W.J.: System Dynamics, 3rd edn. McGraw-Hill, New York, NY (2014)Google Scholar

Copyright information

© Society for Experimental Mechanics, Inc. 2020

Authors and Affiliations

  1. 1.Oak Ridge National Laboratory, Dynamic Systems Analysis GroupElectrical and Electronics Systems Research DivisionOak RidgeUSA

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