The majority of vibration in mechanical systems can be attributed to the lack of significant natural modal damping. In structural members, such as aircraft components, the requirement to maximise fatigue life demands that the structure be strong enough to withstand environmental vibration during service. Strength requires weight, which raises costs, and generally decreases performance. By artificially damping a system using piezoelectric or electromagnetic actuators, vibration can be dramatically reduced. This project is investigating new methods for active structural and acoustic vibration control.

FA-18 Vertical stabilizer with PZT actuators

FA-18 Vertical stabilizer with PZT actuators.

450V charge drive

450V charge drive.

Loudspeaker

Electrically shunted loudspeaker with pressure and velocity sensors.

In precision machines, such as hard disk drives or milling machines, small amounts of vibration and long settling times reduce the accuracy and speed of the device. Damping augmentation can simultaneously improve both of these performance measures. In acoustic enclosures, such as air-conditioning ducts, fans and flow noise can excite resonance with detrimental effects on personal comfort. Acoustic speakers can be employed to reduce the pressure response of enclosures by adding damping to the lightly-damped modes. In contrast to feed-forward based noise cancellation, damping augmentation globally reduces the pressure response to any disturbance.

Books

Piezoelectric Transducers for Vibration Control and Damping

S. O. R. Moheimani, A. J. Fleming

Piezoelectric Transducers for Vibration Control and Damping (Book)

Springer-Verlag, London, 2006, ISBN: 1-84628-331-0.

(Links | BibTeX)

Spatial Control of Vibration: Theory and Experiments

S. O. R. Moheimani, D. Halim, A. J. Fleming

Spatial Control of Vibration: Theory and Experiments (Book)

World Scientific, 2003, ISBN: 981-238-337-9.

(Links | BibTeX)

Articles

A. Wills, D. Bates, A. J. Fleming, B. Ninness, S. O. R. Moheimani

Model predictive control applied to constraint handling in active noise and vibration control (Article)

IEEE Transactions on Control Systems Technology, 16 (1), pp. 3–12, 2008.

(Links | BibTeX)

S. S. Aphale, A. J. Fleming, S. O. R. Moheimani

Integral resonant control of collocated smart structures (Article)

IOP Smart materials and Structures, 16 pp. 439-446, 2007.

(Links | BibTeX)

A. J. Fleming, D. Niederberger, S. O. R. Moheimani, M. Morari

Control of resonant acoustic sound fields by electrical shunting of a loudspeaker (Article)

IEEE Transactions on Control Systems Technology., 14 (4), pp. 689-703, 2007.

(Links | BibTeX)

A. J. Fleming, S. Behrens, S. O. R. Moheimani

Inertial vibration control using a shunted electromagnetic transducer (Article)

IEEE/ASME Transactions on Mechatronics, 11 (1), pp. 84–92, 2006.

(Links | BibTeX)

D. Niederberger, S. Behrens, A. J. Fleming, S. O. R. Moheimani, M. Morari

Adaptive electromagnetic shunt damping (Article)

IEEE/ASME Transactions on Mechatronics, 11 (1), pp. 103–108, 2006.

(Links | BibTeX)

A. J. Fleming, S. O. R. Moheimani

Control oriented synthesis of high performance piezoelectric shunt impedances for structural vibration control (Article)

IEEE Transactions on Control Systems Technology, 13 (1), pp. 98–112, 2005.

(Links | BibTeX)

A. J. Fleming, S. Behrens, S. O. R. Moheimani

Synthesis and implementation of sensor-less active shunt controllers for electromagnetically actuated systems (Article)

IEEE Transactions on Control Systems Technology, 13 (2), pp. 246–261, 2005.

(Links | BibTeX)

S. Behrens, A. J. Fleming, S. O. R. Moheimani

Passive vibration control via electromagnetic shunt damping (Article)

IEEE/ASME Transactions on Mechatronics, 10 (1), pp. 118–122, 2005.

(Links | BibTeX)

D. Niederberger, A. J. Fleming, S. O. R. Moheimani, M. Morari

Adaptive multimode resonant piezoelectric shunt damping (Article)

IOP Smart Materials and Structures, 18 (2), pp. 291–315, 2004.

(Links | BibTeX)

S. O. R. Moheimani, A. J. Fleming, S. Behrens

Dynamics, Stability and Control of Multivariable Piezoelectric Shunts (Article)

IEEE/ASME Transactions on Mechatronics, 9 (1), pp. 87–99, 2004.

(Links | BibTeX)

S. Behrens, A. J. Fleming, S. O. R. Moheimani

A broadband controller for shunt piezoelectric damping of structural vibration (Article)

IOP Smart Materials and Structures, 12 (1), pp. 36–48, 2003.

(Links | BibTeX)

A. J. Fleming, S. O. R. Moheimani

Adaptive piezoelectric shunt damping (Article)

IOP Smart Materials and Structures, 12 (1), pp. 18–28, 2003.

(Links | BibTeX)

A. J. Fleming, S. O. R. Moheimani, S. Behrens

Reducing the Inductance Requirements of Piezoelectric Shunt Damping Circuits (Article)

IOP Smart Materials and Structures, 12 (1), pp. 57–64, 2003.

(Links | BibTeX)

S. O. R. Moheimani, A. J. Fleming, S. Behrens

On the feedback structure of wideband piezoelectric shunt damping systems (Article)

IOP Smart Materials and Structures, 12 (1), pp. 49–56, 2003.

(Links | BibTeX)

S. Behrens, S. O. R. Moheimani, A. J. Fleming

Multiple mode current flowing passive piezoelectric shunt controller (Article)

Journal of Sound and Vibration, 266 (5), pp. 929–942, 2003.

(Links | BibTeX)

A. J. Fleming, S. Behrens, S. O. R. Moheimani

Optimization and implementation of multi-mode piezoelectric shunt damping systems (Article)

IEEE/ASME Transactions on Mechatronics, 7 (1), pp. 87–94, 2002.

(Links | BibTeX)

S. O. R. Moheimani, A. J. Fleming, S. Behrens

Highly resonant controller for piezoelectric shunt damping (Article)

IEE Electronics Letters, 37 (25), pp. 1505–1506, 2001.

(Links | BibTeX)

Misc

A. J. Fleming, S. Behrens, S. O. R. Moheimani

An impedance synthesizing arrangement, an improved vibrational damping apparatus and a method for deriving a digital signal processing algorithm (Misc)

Patent, 2001.

(BibTeX)

Inproceedings

S. S. Aphale, A. J. Fleming, S. O. R. Moheimani

Integral control of smart structures with collocated sensors and actuators (Inproceeding)

Proc. European Control Conference, Kos, Greece, 2007.

(Links | BibTeX)

S. S. Aphale, A. J. Fleming, S. O. R. Moheimani

Integral control of collocated smart structures (Inproceeding)

Proc. SPIE Smart Materials and Structures, San Diego, CA, 2007.

(Links | BibTeX)

A. J. Fleming, D. Niederberger, S. O. R. Moheimani, M. Morari

Mitigation of acoustic resonance using electrically shunted loudspeakers (Inproceeding)

Proc. SPIE Symposium on Smart Structures & Materials -- Damping and Isolation, San Diego, CA, 2006.

(Links | BibTeX)

A. Wills, D. Bates, A. J. Fleming, B. Ninness, S. O. R. Moheimani

Application of MPC to an active structure using sampling rates up to 25kHz (Inproceeding)

Proc. IEEE Conference on Decision and Control and European Control Conference, pp. 3176–3181, Seville, Spain, 2005.

(Links | BibTeX)

A. J. Fleming, S. O. R. Moheimani

Proof-mass inertial vibration control using a shunted electromagnetic transducer (Inproceeding)

Proc. IFAC World Congress, Prague, Czech Republic, 2005.

(Links | BibTeX)

D. Niederberger, A. J. Fleming, S. O. R. Moheimani, M. Morari

Online-tuned multi-mode resonant piezoelectric shunt for broadband vibration suppression (Inproceeding)

Proc. IFAC Symposium on Mechatronic Systems, Sydney, Australia, 2004.

(Links | BibTeX)

A. J. Fleming, S. O. R. Moheimani

Optimal impedance design for piezoelectric vibration control (Inproceeding)

Proc. IEEE Conference on Decision and Control, Bahamas, 2004.

(Links | BibTeX)

S. Behrens, A. J. Fleming, S. O. R. Moheimani

Negative inductor-resistor controller for electromagnetic shunt damping (Inproceeding)

Proc. IFAC Symposium on Mechatronic Systems, Sydney, Australia, 2004.

(Links | BibTeX)

A. J. Fleming, S. O. R. Moheimani

Synthesis of optimal piezoelectric shunt impedances for structural vibration control (Inproceeding)

Proc. SPIE Symposium on Smart Structures & Materials -- Damping and Isolation, San Diego, CA, 2004.

(Links | BibTeX)

S. Behrens, A. J. Fleming, S. O. R. Moheimani

Control orientated synthesis of electromagnetic shunt impedances for vibration isolation (Inproceeding)

Proc. IFAC Symposium on Mechatronic Systems, Sydney, Australia, 2004.

(Links | BibTeX)

S. Behrens, A. J. Fleming, S. O. R. Moheimani

Vibration isolation using a shunted electromagnetic transducer (Inproceeding)

Proc. SPIE Symposium on Smart Structures & Materials -- Damping and Isolation, San Diego, CA, 2004.

(Links | BibTeX)

A. J. Fleming, S. O. R. Moheimani

An autonomous piezoelectric resonant shunt damping system (Inproceeding)

Proc. SPIE Symposium on Smart Structures & Materials -- Damping and Isolation, San Diego, CA, 2003.

(Links | BibTeX)

S. Behrens, A. J. Fleming, S. O. R. Moheimani

Robust piezoelectric passive shunt dampener (Inproceeding)

Proc. SPIE Symposium on Smart Structures & Materials -- Damping and Isolation, San Diego, CA, 2003.

(Links | BibTeX)

A. J. Fleming, S. O. R. Moheimani

Active H₂ and H[subscript infinity] shunt control of electromagnetic transducers (Inproceeding)

Proc. IEEE Conference on Decision and Control, Maui, HI, 2003.

(Links | BibTeX)

S. Behrens, A. J. Fleming, S. O. R. Moheimani

Electromagnetic shunt damping (Inproceeding)

Proc. IEEE/ASME Confernece on Advanced Intelligent Mechatronics, Kobe, Japan, 2003.

(Links | BibTeX)

S. Behrens, A. J. Fleming, S. O. R. Moheimani

Electrodynamic vibration suppression (Inproceeding)

Proc. SPIE Symposium on Smart Structures & Materials -- Damping and Isolation, San Diego, CA, 2003.

(Links | BibTeX)

S. O. R. Moheimani, S. Behrens, A. J. Fleming

Dynamics and stability of wideband vibration absorbers with multiple piezoelectric transducers (Inproceeding)

Proc. IFAC Symposium on Mechatronic Systems, Berkeley, CA, 2002.

(Links | BibTeX)

A. J. Fleming, S. O. R. Moheimani

Power harvesting piezoelectric shunt damping (Inproceeding)

Proc. IFAC Symposium on Mechatronic Systems, Berkeley, CA, 2002.

(Links | BibTeX)

A. J. Fleming, S. O. R. Moheimani

The effect of artificially reducing the size of inductor values in piezoelectric shunt damping circuits (Inproceeding)

Proc. IFAC Symposium on Mechatronic Systems, Berkeley, CA, 2002.

(Links | BibTeX)

S. O. R. Moheimani, A. J. Fleming, S. Behrens

On the feedback structure of wideband piezoelectric shunt damping systems (Inproceeding)

Proc. IFAC World Congress, Barcelona, Spain, 2002.

(Links | BibTeX)

S. Behrens, S. O. R. Moheimani, A. J. Fleming

Multiple mode passive piezoelectric shunt dampener (Inproceeding)

Proc. IFAC Symposium on Mechatronic Systems, Berkeley, CA, 2002.

(Links | BibTeX)

A. J. Fleming, S. O. R. Moheimani

Adaptive piezoelectric shunt damping (Inproceeding)

Proc. SPIE Symposium on Smart Structures and Materials -- Industrial and Commercial Applications of Smart Structures Technologies, San Diego, CA, 2002.

(Links | BibTeX)

S. Behrens, A. J. Fleming, S. O. R. Moheimani

Series-parallel impedance structure for piezoelectric vibration damping (Inproceeding)

Proc. SPIE International Symposium on Smart Materials, Nano, and Micro-Smart Systems, Melbourne, Australia, 2002.

(Links | BibTeX)

S. Behrens, A. J. Fleming, S. O. R. Moheimani

New method for multiple-mode shunt damping of structural vibration using a single piezoelectric transducer (Inproceeding)

Proc. SPIE International Symposium on Smart Structures -- Damping & Isolation, pp. 239–250, New Port Beach, CA, 2001.

(Links | BibTeX)

A. J. Fleming, S. Behrens, S. O. R. Moheimani

A new approach to piezoelectric shunt damping (Inproceeding)

Proc. IS3M International Symposium on Smart Structures and Microsystems, Hong Kong, 2000.

(Links | BibTeX)

A. J. Fleming, S. Behrens, S. O. R. Moheimani

Innovations in piezoelectric shunt damping (Inproceeding)

Proc. SPIE Symposium on Smart Materials and MEMs, Melbourne, Australia, 2000.

(Links | BibTeX)

Support

Supported by the University of Newcastle and CDSC