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Optimal placement of flat piezoactuators for an adaptive feedforward control system

Haase, Thomas and Misol, Malte and Unruh, Oliver (2012) Optimal placement of flat piezoactuators for an adaptive feedforward control system. ICSV19 2012 , 08.-12. Juli 2012, Vilnius. Litauen.

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Increasing the sound transmission loss of lightweight panels is a crucial step for future aircrafts having carbon fiber reinforced plastic (CFRP) fuselage structures. The frequencies below 600 Hz are considered for the design of active methods because of the extensive mass requirements of passive damping methods in this frequency range. Piezoceramic actuators are very often placed with regard to controllability criteria or concerning optimal control theory coupled with a genetic optimization algorithm. These methods of placement are not able to reflect the special characteristics which are typical for an adaptive feedforward control system (AFCS), for example the causality aspect, FIR filter length and limited numbers of sensors. Due to their stability (90° phase margin) and robustness (adaptive algorithm) AFCS systems are frequently used for vibration and noise problems associated to lightweight structures. To overcome these limitations the active structural acoustic control (ASAC) pre-design tool developed at DLR is extended with a causal control algorithm which reflects the limitations of an AFCS. The performance of this type of placement method is shown by simulations with a Filtered-x least mean square (FxLMS) feedforward algorithm.

Item URL in elib:https://elib.dlr.de/76653/
Document Type:Conference or Workshop Item (Paper)
Title:Optimal placement of flat piezoactuators for an adaptive feedforward control system
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:July 2012
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Actuator Placement, Optimal Causal Control, Adaptive Feedforward Control, FxLMS
Event Title:ICSV19 2012
Event Location:Vilnius. Litauen
Event Type:international Conference
Event Dates:08.-12. Juli 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:V SH - Verbesserung der Sicherheit im Verkehr (old)
DLR - Research area:Transport
DLR - Program:V SH - Verbesserung der Sicherheit im Verkehr
DLR - Research theme (Project):V - Aktive Vibrations- und Lärmreduzierung an Fahrzeugen (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Stanitzek, Silke
Deposited On:01 Aug 2012 07:39
Last Modified:01 Aug 2012 07:39

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