H∞ Control of Active Constrained Layer Damping
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چکیده
Conventional passive constrained layer damping treatments with visco-elastic cores are provided with built-in sensing and actuation capabilities to actively control and enhance their vibration damping characteristics. Two configurations of the resulting hybrid treatment are considered in this paper. In the first configuration the active control and passive operate separately; whereas in the second configuration, the two operate in unison in order to maximize the energy dissipation characteristics. In this study, three objectives are accomplished. The first objective aims at the design and implementation of robust H∞ controllers for the separated and unified control strategies. In the second, the performance of the H∞ controllers at different operating frequencies and temperatures is compared with that of a conventional proportional/derivative controller in order to demonstrate robustness. Finally, a control effort study involving the H∞ controllers for the separated and unified control strategies is shown in order to assess the efficiency of the active control scheme in controlling structural vibration. The results obtained emphasize the potential of the optimally design unified control strategy as an effective means for providing broad-band attenuation capabilities over a wide range of operating temperatures.
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تاریخ انتشار 1998