| Shock Waveform Synthesis Methods for Shock Response Spectrum over Short Time Interval, Digital Filter for Obtaining Shock Response History and Applications Thereof |
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Eul-Jae Yoon |
| 충격응답 스펙트럼이 나타나는 시간들의 차이가 짧은 충격파형의 합성방법 및 충격응답 내역을 구하는 디지털 필터 |
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윤을재 |
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국방과학연구소 |
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| Abstract |
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This paper describes shock waveform synthesis methods for a shock response spectnlm over a short time interval with which intereference between parts within a test item is increased to perform a sufficient shock test for damage or malfunction which may be caused by the interference between parts, and a digital filter for obtaining a shock response history required for the shock waveform synthesis and a digital inverse filter for restoration by inversely using the digital filter. The time at which the maximax value occurs in the response history is detected in order to establish a delay time which is one of the parameters in the wavelet, on the condition that the natural frequency of SDOF system with a Q (quality factor) of 10 equals to the wavelet frequency of the zero delay wavelet input. A shock response spectrum over a short time interval and an abrupt change in the acceleration for an instant are illustrated as features of the synthesized waveform. |
| Key Words:
Shock Response Spectrum, Natural Frequency, Wavelet, Single Degree of Freedom, Transfer Function, Response History |
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