An improved shaking-table control method has been developed. This method compensates the reaction force caused by a nonlinear specimen in real time, and thus maintains a desired table acceleration. To do so, it identifies the difference between the desired and the actual transfer characteristics of the shaking table, then compensates for the difference. Because the required time for this combination of identification and compensation is less than one second, the method can compensate, in real time, for the disturbance caused by a nonlinear specimen. By means of a series of experiments, it is confirmed that the method can maintain a desired table acceleration even when a nonlinear specimen is under excitation.

1.
Nowak, R. F., Kusner, D. A., Larson, R. L., and Thoen, B. K., 2000, “Utilizing Modern Digital Signal Processing for Improvement of Large Scale Shaking Table Performance,” Proc. 12th World Conference on Earthquake Engineering, New Zealand, Paper No. 2035.
2.
Ogawa, N., Ohtani, K., Nakamura, I., Sati, E., and Nagasaki, T., 2000, “Development of Core Technology for 3-D 1200 Tonne Large Shaking Table,” Proc. 12th World Conference on Earthquake Engineering, New Zealand, Paper No. 2156.
3.
Dozono
,
Y.
,
Horiuchi
,
T.
, and
Konno
,
T.
,
2001
, “
Improvement of Shaking-Table Control With Adaptive Filter
,”
Trans. Jpn. Soc. Mech. Eng., Ser. C
,
C-67
(
664
), pp.
3801
3807
, (in Japanese).
4.
A˚stro¨m, K. J., and Wittenmark, B., 1984, Computer Controlled Systems, Prentice-Hall, Inc., Englewood Cliffs, N.J., Chap. 13.
5.
Horiuchi, T., Dozono, Y., and Konno, T., 2001, “Improvement of Accuracy of Seismic-Acceleration Waveforms of Shaking Tables by Compensating for the Reaction Force in Real-Time,” Trans. 16th International Conference on Structural Mechanics in Reactor Technology, Washington DC, Paper No. 1085.
6.
Clough, R. W., and Penzien, J., 1982, Dynamics of Structures, McGraw-Hill Kogakusha, Tokyo, Japan, Chap. 26-5.
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