Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Parameter Identification Using Static Compliance Dominant Frequencies

정유연성 지배주파수를 이용한 매개변수 인식기법

  • Published : 2005.02.01
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Abstract

This paper presents an improved system identification methodology for structural systems by applying static compliance dominant (SCD) frequencies. The existing sensitivity-based system identification technique is extended to adopt the static compliance dominant frequencies, and the performance of the additional spectral information, i.e., SCD frequencies, is compared with that of the natural frequencies only via a numerical example of a mechanical system. The results of the numerical study indicate that the additional use of the SCD frequencies improves accuracy in system identification problems.

본 논문에서는 정유연성 지배주파수를 이용한 개선된 매개변수 인식기법이 제안되었다. 정유연성 지배주파수를 이용할 경우 주파수응답함수에서 고유주파수 보다 다수의 정보를 추출할 수 있어 매개변수 인식의 성능을 향상시킬 수 있는 장점이 있다. 정유연성 지배주파수를 매개변수 인식에 이용하기 위하여 기존의 고유주파수 민감도에 기반한 구조계 인식기법이 확장되었다. 정유연성 지배주파수의 이용을 통한 매개변수 인식의 성능향상은 수치예제를 통해 증명하였다. 수치예제는 스프링과 질량으로 이루어진 간략 모델이 사용되었으며, 고유주파수 만을 이용하여 구한 인식값과 비교한 결과 보다 정확한 매개변수 값의 인식이 가능함을 알 수 있었다.

Keywords

References

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