TY - GEN
T1 - Derivation of modal parameters of a flexible structure based on multi-decimation identification method
AU - Hashimoto, Seiji
AU - Ishikawa, Takeo
AU - Adachi, Shuichi
AU - Funato, Hirohito
PY - 2002
Y1 - 2002
N2 - Significant progress has been made over the last decades toward making active structural control, a viable technology for enhancing structural functionality and safety against natural hazards such as earthquakes and strong winds. In high performance active vibration control, it is required to establish an accurate model of the structure to avoid spillover instability of the control system. Moreover, due to the progress of the vibration control technology, it is necessary to identify not only the 1st but also the 2 nd and the 3rd vibration modes of the flexible structure. This paper presents the derivation method of modal parameters of flexible structures based on the system identification theory. In this identification, multi-decimation (MD) operation is applied to identify wide frequency region accurately. The advantages of this modeling method are as follows; (1) The vibrating time of the structure for identification is shorter than conventional sine-wave sweeping method. (2) The vibration modes that we focused on can be identified accurately. (3) By using circle curve fitting on each identified mode, one modal model applicable to multi-mode control can be derived as the system description. We apply the proposed identification method to the three-story structure, and construct the vibration control system based on the Hx control theory using the identified model. The effectiveness of the proposed identification and control methods is shown through the experimental analysis.
AB - Significant progress has been made over the last decades toward making active structural control, a viable technology for enhancing structural functionality and safety against natural hazards such as earthquakes and strong winds. In high performance active vibration control, it is required to establish an accurate model of the structure to avoid spillover instability of the control system. Moreover, due to the progress of the vibration control technology, it is necessary to identify not only the 1st but also the 2 nd and the 3rd vibration modes of the flexible structure. This paper presents the derivation method of modal parameters of flexible structures based on the system identification theory. In this identification, multi-decimation (MD) operation is applied to identify wide frequency region accurately. The advantages of this modeling method are as follows; (1) The vibrating time of the structure for identification is shorter than conventional sine-wave sweeping method. (2) The vibration modes that we focused on can be identified accurately. (3) By using circle curve fitting on each identified mode, one modal model applicable to multi-mode control can be derived as the system description. We apply the proposed identification method to the three-story structure, and construct the vibration control system based on the Hx control theory using the identified model. The effectiveness of the proposed identification and control methods is shown through the experimental analysis.
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U2 - 10.1109/isie.2002.1026326
DO - 10.1109/isie.2002.1026326
M3 - Conference contribution
AN - SCOPUS:84902355683
SN - 0780373693
SN - 9780780373693
T3 - IEEE International Symposium on Industrial Electronics
SP - 436
EP - 440
BT - ISIE 2002 - Proceedings of the 2002 IEEE International Symposium on Industrial Electronics
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2002 IEEE International Symposium on Industrial Electronics, ISIE 2002
Y2 - 8 July 2002 through 11 July 2002
ER -