Abstract
In a previous paper, preliminary results on active control of flexural power flow in elastic thin beams were presented [C. R. Fuller and L. O. Gonidou, J. Acoust. Soc. Am. Suppl. 1 84, S47 (1988)]. The work described here will be concerned with further experimental and analytical work on the same subject. In particular, the control of flexural power flow from finite beams with various terminating impedances and different length beams is both analytically and experimentally studied and direct comparisons are now made. Parameters such as discontinuity impedance, bending nearfield generation, and number and location of control actuators and sensors are studied in light of the new test configurations. Mechanisms of control are discussed. The use of a flexural power-based cost function is again demonstrated to be important in designing an efficient control strategy. [Work supported by NASA Langley Research Center.]
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