Date of Award
Master of Science
Department of Aeronautics and Astronautics
Gregory S. Agnes, PhD
For a compressor disk, effective vibration suppression requires broadband control, and the elimination of inter-blade coupling forces. Previous researchers achieved this using an active/passive piezoelectric shunt network. Unfortunately, optimal tuning of the shunt requires prior knowledge of the coupling strength, which is not well defined. This thesis uses an adaptive parameter estimator to eliminate the inter-blade coupling forces. In addition, the passive shunt is replaced with an analogous positive position feedback method. The resulting control law was used on a simulated four and eight bladed system. While substantial reductions in system response were achieved for the Adaptive/PPF control technique, the parameter estimates did not always converge to the correct solution. Similar reductions in the response were achieved using PPF control by itself.
DTIC Accession Number
Keller, Mark J., "Vibration Suppression of a Rotationally Periodic Structure Using an Adaptive/PPF Control Law" (2001). Theses and Dissertations. 4640.