Abstract
Active control of flexural power flow in infinite and semi‐infinite thin elastic beams by point force inputs is analytically studied. Various forms of terminating impedances or discontinuities positioned on the beam are also considered. The influence of system parameters such as the discontinuity impedance and effects such as bending nearfield generation on the location and number of control actuators and error sensors is investigated and discussed. The mechanisms by which control is achieved are considered. It is demonstrated that these types of boundary conditions strongly influence the choice of optimal controller format. For example, if the error signal only contains information from the propagating wave component, then only one control actuator is needed for complete attenuation of flexural power flow. Finally, preliminary results of a companion experimental investigation will be discussed and compared with the theoretical developments. [Work supported by NASA Langley Research Center.]
Published Version
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