Journal of the Korean Society for Precision Engineering (한국정밀공학회지)
- Volume 16 Issue 1 Serial No. 94
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- Pages.246-252
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- 1999
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- 1225-9071(pISSN)
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- 2287-8769(eISSN)
A Study on Analysis of Non linear Frequency Response of Electro-Hydraulic Systems
전기 유압 시스템의 비선형 주파수 응답 해석에 관한 연구
- Published : 1999.01.01
Abstract
In this paper, the frequency response characteristics of the velocity controlled EHS system obtained by linear simulation method, nonlinear simulation method, and experimentation are compared one another, in order to verify propriety of the linearization method in case of analysis of hydraulic systems. The Bode diagrams are obtained by transforming time domain data of experimental results and nonlinear simulated ones with Fourier transform. The results of nonlinear simulation are more similar to the frequency response of the real systems than those of linear simulation. It is found that nonlinearity of hydraulic systems is mainly occurred from servo valve, and nonlinearity is increased as displacement of servo valve spool increases.
Keywords