Vibration Suppression of a Rotationally Periodic Structure Using an Adaptive-PPF Control Law

<p>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.</p><p>This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact and remains as true to the original work as possible. Therefore you will see the original copyright references library stamps (as most of these works have been housed in our most important libraries around the world) and other notations in the work.</p><p>This work is in the public domain in the United States of America and possibly other nations. Within the United States you may freely copy and distribute this work as no entity (individual or corporate) has a copyright on the body of the work.</p><p>As a reproduction of a historical artifact this work may contain missing or blurred pages poor pictures errant marks etc. Scholars believe and we concur that this work is important enough to be preserved reproduced and made generally available to the public. We appreciate your support of the preservation process and thank you for being an important part of keeping this knowledge alive and relevant.</p><br>