Vibration control with electrodynamic actuators

Abstract

This thesis deals with different configurations of an electrodynamic actuator that is used to control vibrations of mechanical structures.  Stability and vibration reduction performance are investigated both with theoretical and experimental studies on the model problem of an aircraft panel.

At first a conventional, electrodynamic, reactive actuator acting on the aircraft panel and reacting against a fixed based is studied.  Direct velocity feedback with ideal velocity sensor and force actuator, with an accelerometer sensor and with different self-sensing control schemes such as a shunted resistor, positive current feedback induced voltage feedback and induced voltage feedback with inductance compensation are compared. 

Then the design of a more practical, lightweight, electrodynamic, inertial actuator is studied.  Important design considerations for the mechanical and the electrical parts are highlighted and some designed characteristics are validated at a prototype actuator.

Finally the lightweight, electrodynamic, inertial actuator is applied on the aircraft panel and vibration reduction is compared to passive means of vibration reduction.  First internal relative velocity and external absolute velocity feedback are investigated considering ideal sensors.  In practice, the external velocity feedback loop is implemented using a commercial accelerometer while the internal velocity feedback loop is implemented with self-sensing control schemes or, as an alternative, with a secondary coil sensor.  Then internal and external direct velocity feedback loops are implemented simultaneously using either the accelerometer – self-sensing or accelerometer – secondary coil sensor combination.

More information

Identifiers

Catalogue record

Export record

ASCII CitationAtomBibTeXData Cite XMLDublin CoreDublin CoreEP3 XMLEndNoteHTML CitationHTML CitationHTML ListJSONMETSMODSMPEG-21 DIDLOpenURL ContextObjectOpenURL ContextObject in SpanRDF+N-TriplesRDF+N3RDF+XMLRIOXX2 XMLReferReference ManagerSimple Metadata