웨이블릿 변환을 이용한 가속도 기록의 이중 적분법에 관한 연구
Double Integration of Acceleration Record Using Wavelet Transform
웨이블릿 가속도 기록 이중 적분법 수치 적분법;
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It is well known that double integration of measured acceleration records is one of the most difficult signal processing, particularly in the case of measurements on civil engineering structures. The measured accelerations on civil structures usually contain non-gaussian and low-frequency noises as well as acceleration records are non-stationary. For this type of signals, wavelet transform can be useful because of its inherent processing abilities for non-stationary signals. In this paper, the de-noising algorithm using the wavelet transform are slightly extended to process non-gaussian and low frequency noises, using median filter concepts. The example studies show that the integration can be improved using proposed method.