4차 모멘트를 이용한 비선형성의 탐색Detection of Nonlinearity Using a Fourth Moment

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Existence of any nonlinearity in responses of a nonlinear system is tested using a kurtosis or a fourth moment which has been widely used to characterize signal patterns. By inputting a harmonic signal to a system and investigating the distortions of an output signal from a harmonic pattern, which are due to violations of proportionality between the input and the output, it is judged whether the output is generated from a nonlinear system or not. Through applying the method presented in this work to simulation studies on detections of nonlinearities of a single degree of freedom system, in which three kinds of nonlinearities are treated as restoring force terms, feasibilities of the method are shown and the range of both frequency and input amplitude, in which the system generates nonlinear responses, is determined.
Publisher
한국소음진동공학회
Issue Date
1994-01
Language
Korean
Citation

한국소음진동공학회논문집, v.4, no.3, pp.307 - 318

ISSN
1598-2785
URI
http://hdl.handle.net/10203/66877
Appears in Collection
ME-Journal Papers(저널논문)
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