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Optimal placement of flat piezoceramic actuators for feedforward systems under the influence of real-time hardware delays

Haase, Thomas and Misol, Malte and Rose, Michael (2015) Optimal placement of flat piezoceramic actuators for feedforward systems under the influence of real-time hardware delays. Journal of Sound and Vibration (345), pp. 34-46. Elsevier. doi: 10.1016/j.jsv.2015.02.009. ISSN 0022-460X.

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1016/j.jsv.2015.02.009


Active vibration control (AVC)systems have been investigated for several decades now. Many researchers have shown that an optimal actuator placement results in an improved performance of the AVC system. In the case of a broadband disturbance, feedback systems are very often used to control plate structures. Detailed optimisation routines for feedback systems that incorporate not only the optimisation of the actuator placement but also the controller design (e.g. feedback gains, H1 �controller)can be found in the literature. Yet, in the case of a feedforward control design for a broadband disturbance, special aspects like causality and coherence limit the performance of an AVC system. The linear quadratic optimal control theory (LQOCT)is very often used to calculate the optimal actuator voltages for the placement of actuators in a feedforward control system. However, the LQOCT completely neglects the causality constraint of a real-time applicable feedforward control system. The aim of this work is to study the influence of analogue and digital signal processing delays on the actuator placement in a feedforward control system under broadband excitation and to improve the predicted performance of an AVC system with optimised actuator placements. Therefore, a pre-design tool is used to optimise the actuator placement and it is shown that the actuator placement changes significantly by the integration of the signal processing delays in to the pre-design tool. Due to their frequent use in smart structures piezoelectric patch actuators are used in this study.Furthermore, the optimised actuator placement is used for an experiment with a feedforward controller and shows an improved performance of 3.2 dB in the averaged error signal spectrum over a frequency range from 22.5 Hz up to 600 Hz compared to the actuator placed without signal processing delays.

Item URL in elib:https://elib.dlr.de/97047/
Document Type:Article
Title:Optimal placement of flat piezoceramic actuators for feedforward systems under the influence of real-time hardware delays
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Journal or Publication Title:Journal of Sound and Vibration
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 34-46
Series Name:Elsevier Journal of Sound and Vibration
Keywords:active vibration control, causality, feedforward, optimla actuator placement
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation (old), L - Systems and Cabin (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Haase, Thomas
Deposited On:06 Jul 2015 09:52
Last Modified:21 Nov 2023 13:59

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