Abstract

This paper proposes a method for determination of optimal reference spectrum in random vibration control. The least square method is used to minimize the spectrum deviation between the specified reference spectrum and spectra at the specimen-mounted points. This method needs only the measured FRF's at the control point and specimen-mounted points in pre-vibration test. Using the proposed method as reference spectrum, it is possible to easily predict spectra at the specimen-mounted points, and also to reduce overtest resulting from dynamic characteristics of shaker and fixture. This method is shown through theoretical and experimental results to be an effective method.

Keywords

• Environmental Test;
• Random Vibration Control;
• Reference Spectrum;
• Fixture

• 환경시험;
• 랜덤 진동제어;
• 기준스펙트럼;
• 치구;