• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 추계학술대회논문집A
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• pp.562-567
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• 2001

The number of required modes to provide accurate force information in a truncated model of a flexible structure is investigated. In the case of modal truncation of a distributed parameter system, the difference in convergence rates between displacements and forces is discussed. The residual flexibility, a term from past literature, is used to recapture some of the lost force information in a truncated model. This paper presents numerical and experimental results of a study where the residual flexibility is used in conjunction with a Kalman filter so that accurate force information may be obtained from a small set of displacement measurements with a reduced-order model. The motivation for this paper is to be able to obtain accurate information about unmeasurable dynamic reaction forces in a rotating machine for diagnostic and control purposes.

• 한국정밀공학회지
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• 제19권1호
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• pp.150-157
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• 2002

The number of required modes to provide accurate force information in a truncated model of a flexible structure is investigated. In the case of modal truncation of a distributed parameter system, the difference in convergence rates between displacements and forces is discussed. The residual flexibility. a term from past literature, is used to recapture some of the lost force information in a truncated model. This paper presents numerical and experimental results of a study where the residual flexibility is used in conjunction with a Kalman filter so that accurate force information may be obtained from a small set of displacement measurements wish a reduced-order model. The motivation for this paper is to be able to obtain accurate information about unmeasurable dynamic reaction forces in a rotating machine for diagnostic and control purposes.

• 한국음향학회지
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• 제16권3호
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• pp.38-44
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• 1997

본 연구에서는 Bussgang 계열의 복소수형 LMF-Sato 및 LMSF-Sato 블라인드 등화 알고리즘을 유도한 후, 이들 알고리즘에 대한 수렴속도, 정상상태에서의 수렴특성 및 안정성을 기종의 LMS-Sato 및 LMSF-Sato 알고리즘이 LMS-Sato 알고리즘에 비해 더 나은 수렴 특성을 보여 주었다. 그러나 계수벡터의 초기 추정오차가 큰 경우 LMF-Sato 알고리즘에 비해 더 나은 수렴 특성을 보여 주었다. 그러나 계수벡터의 초기 추저오차가 큰 경우 LMF-Sato 알고리즘은 안정성이 떨어지는 특성을 보여준 반면, LMSF-Sato 알고리즘은 좋은 수렴 특성과 견실성을 고루 갖추고 있음을 보여 주었다.