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

Book Chapters

Dynamics and Control of Active Microcantilevers

M. G. Ruppert; S. O. R. Moheimani

Dynamics and Control of Active Microcantilevers Book Chapter

Baillieul, John ; Samad, Tariq (Ed.): Encyclopedia of Systems and Control, 2 , Springer London, 2019, ISBN: 978-1-4471-5102-9.

Abstract | Links | BibTeX

Journal Articles

AFM Cantilever Design for Multimode Q Control: Arbitrary Placement of Higher-Order Modes

S. I. Moore; M. G. Ruppert; Y. K. Yong

AFM Cantilever Design for Multimode Q Control: Arbitrary Placement of Higher-Order Modes Journal Article

IEEE/ASME Transactions on Mechatronics, pp. 1-6, 2020, (Early Access).

Abstract | Links | BibTeX

An optimization framework for the design of piezoelectric AFM cantilevers

S. I. Moore; M. G. Ruppert; Y. K. Yong

An optimization framework for the design of piezoelectric AFM cantilevers Journal Article

Precision Engineering, 60 , pp. 130-142, 2019.

Abstract | Links | BibTeX

Multimodal atomic force microscopy with optimized higher eigenmode sensitivity using on-chip piezoelectric actuation and sensing

M. G. Ruppert; S. I. Moore; M. Zawierta; A. J. Fleming; G. Putrino; Y. K. Yong

Multimodal atomic force microscopy with optimized higher eigenmode sensitivity using on-chip piezoelectric actuation and sensing Journal Article

Nanotechnology, 30 (8), pp. 085503, 2019.

Abstract | Links | BibTeX

Self-sensing, estimation and control in multifrequency Atomic Force Microscopy.

M. G. Ruppert

Self-sensing, estimation and control in multifrequency Atomic Force Microscopy. Journal Article

Journal & Proceedings of the Royal Society of New South Wales, 151 (1), pp. 111, 2018, ISSN: 0035-9173/18/010111-01.

Abstract | Links | BibTeX

On-chip Dynamic Mode Atomic Force Microscopy: A silicon-on-insulator MEMS approach

M. G. Ruppert; A. G. Fowler; M. Maroufi; S. O. R. Moheimani

On-chip Dynamic Mode Atomic Force Microscopy: A silicon-on-insulator MEMS approach Journal Article

IEEE Journal of Microelectromechanical Systems, 26 (1), pp. 215-225, 2017.

Abstract | Links | BibTeX

Optimal integral force feedback for active vibration control

Y. R. Teo; A. J. Fleming

Optimal integral force feedback for active vibration control Journal Article

Journal of Sound and Vibration, 356 (11), pp. 20-33, 2015.

Abstract | Links | BibTeX

A novel self-sensing technique for tapping-mode atomic force microscopy

M. G. Ruppert; S. O. R. Moheimani

A novel self-sensing technique for tapping-mode atomic force microscopy Journal Article

Review of Scientific Instruments, 84 (12), pp. 125006, 2013.

Abstract | Links | BibTeX

A. G. 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 Journal 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 Journal 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 Journal Article

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

Links | BibTeX

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

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

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

Links | BibTeX

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

Adaptive multimode resonant piezoelectric shunt damping Journal 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 Journal 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 Journal 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 Journal 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 Journal 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 Journal 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 Journal 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 Journal 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 multimode piezoelectric shunt damping Journal Article

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

Links | BibTeX

Miscellaneous

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 Miscellaneous

Patent, 2001.

BibTeX

Inproceedings

Characterization of Active Microcantilevers Using Laser Doppler Vibrometry

M. G. Ruppert; N. F. S. D. Bem; A. J. Fleming; Y. K. Yong

Characterization of Active Microcantilevers Using Laser Doppler Vibrometry Inproceedings

18th Asian Pacific Vibration Conference, Sydney, Australia, 2019.

Abstract | BibTeX

A Five-Axis Monolithic Nanopositioning Stage Constructed from a Bimorph Piezoelectric Sheet

M. Omidbeike; Y. K. Yong; S. I. Moore; A. J. Fleming

A Five-Axis Monolithic Nanopositioning Stage Constructed from a Bimorph Piezoelectric Sheet Inproceedings

Helsinki, Finland, 2019.

Abstract | BibTeX

Model-based Q Factor Control for Photothermally Excited Microcantilevers

M. G. Ruppert; B. S. Routley; A. J. Fleming; Y. K. Yong; G. E. Fantner

Model-based Q Factor Control for Photothermally Excited Microcantilevers Inproceedings

Int. Conference on Manipulation, Automation and Robotics at Small Scales (MARSS), Helsinki, Finland, 2019.

Abstract | BibTeX

Modeling and Noise Analysis of a Microcantilever-based Mass Sensor

D. M. Harcombe; M. G. Ruppert; A. J. Fleming

Modeling and Noise Analysis of a Microcantilever-based Mass Sensor Inproceedings

Int. Conference on Manipulation, Automation and Robotics at Small Scales (MARSS), Helsinki, Finland, 2019.

Abstract | BibTeX

Design of Hybrid Piezoelectric/Piezoresistive Cantilevers for Dynamic-mode Atomic Force Microscopy

M. G. Ruppert; Y. K. Yong

Design of Hybrid Piezoelectric/Piezoresistive Cantilevers for Dynamic-mode Atomic Force Microscopy Inproceedings

IEEE/ASME Advanced Intelligent Mechatronics (AIM), Auckland, New Zealand, 2018.

Abstract | BibTeX

Novel Reciprocal Self-Sensing Techniques for Tapping-Mode Atomic Force Microscopy

M. G. Ruppert; S. O. R. Moheimani

Novel Reciprocal Self-Sensing Techniques for Tapping-Mode Atomic Force Microscopy Inproceedings

19th IFAC World Congress, Cape Town, South Africa, 2014.

Abstract | Links | BibTeX

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

Integral control of smart structures with collocated sensors and actuators Inproceedings

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 Inproceedings

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 Inproceedings

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

Links | BibTeX

A. G. 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 Inproceedings

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

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 Inproceedings

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 Inproceedings

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 Inproceedings

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 Inproceedings

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 Inproceedings

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 Inproceedings

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

Links | BibTeX

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

Power harvesting piezoelectric shunt damping Inproceedings

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 Inproceedings

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 Inproceedings

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

Links | BibTeX

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

Multiple mode passive piezoelectric shunt dampener Inproceedings

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

Links | BibTeX

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

Adaptive piezoelectric shunt damping Inproceedings

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 Inproceedings

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 Inproceedings

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 Inproceedings

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 Inproceedings

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

Links | BibTeX