Journal of KSNVE (소음진동)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Use of Higher Order Frequency Response Functions for Non-Linear Parameter Estimation

고차 주파수응답함수를 이용한 비선형시스템의 매개변수 추정

  • 이건명 (경상대학교 기계공학과, 항공기부품기술연구소)
  • Published : 1997.04.01
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Abstract

Presented is a method to estimate system parameters of a system with polynomial non-linerities from the measured higher order frequency response functions. Higher order FRFs can be measured on some restricted regions by sinusoidally exciting a non-linear system with various input amplitudes and measuring the response component at the excitation frequency. These higher order FRFs can be expressed in terms of system parameter, and the system parameters can be estimated from the measured FRFs. Since the expressions for higher order FRFs are complicated, system parameters can be estimated from them using an optimization technique. The present method has been applied to a simulated single degree of freedom system with non-linear stiffness and damping, and has estimated accurate system parameters.

Keywords

References

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