Smart panel with time-varying shunted piezoelectric patch absorbers for broadband vibration control

An adaptive tuned vibration absorber (ATVA) can retune itself in response to a time-varying excitation frequency, enabling effective vibration attenuation over a range of frequencies. For a wide tuning range the ATVA is best realized through the use of a beam-like structure whose mechanical properties can be adapted through servo-actuation. This is readily achieved either by repositioning the beam supports (‘moveable-supports ATVA’) or by repositioning attached masses (‘moveable-masses ATVA’), with the former design being more commonly used, despite its relative constructional complexity. No research to date has addressed the fact that the effective mass of such devices varies as they are retuned, thereby causing a variation in their attenuation capacity. This article derives both the tuned frequency and effective mass characteristics of such ATVAs through a unified non-dimensional modal-based analysis that enables the designer to quantify the expected performance for any given application. The analysis reveals that the moveable-masses concept offers significantly superior vibration attenuation. Motivated by this analysis, a novel ATVA with actuator-incorporated moveable masses is proposed, which has the additional advantage of constructional simplicity. Experimental results from a demonstrator correlate reasonably well with the theory, and vibration control tests with logic-based feedback control demonstrate the efficacy of the device.

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Robust adaptive vibration control for a string with time-varying output constraint

International Journal of Robust and Nonlinear Control ◽

10.1002/rnc.4300 ◽

2018 ◽

Vol 28 (17) ◽

pp. 5213-5231 ◽

Cited By ~ 1

Author(s):

Wei He ◽

Zhe Jing ◽

Xiuyu He ◽

Jin-Kun Liu ◽

Changyin Sun

Keyword(s):

Vibration Control ◽

Time Varying ◽

Robust Adaptive ◽

Adaptive Vibration Control ◽

Output Constraint

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Nonstationary Robust Positioning Control of Flexible Structures

Volume 3C: 15th Biennial Conference on Mechanical Vibration and Noise — Vibration Control, Analysis, and Identification ◽

10.1115/detc1995-0602 ◽

1995 ◽

Author(s):

Susumu Hara ◽

Kazuo Yoshida

Keyword(s):

Vibration Control ◽

Flexible Structures ◽

Synthesis Method ◽

Riccati Equations ◽

Time Varying ◽

Criterion Function ◽

Positioning Control ◽

Vibrating System ◽

Smooth Change ◽

Time Invariant

Abstract For positioning control of such vibrating system as flexible structures, it is important to reduce vibration. In the problem, influences of such uncertainties as variations of parameters of controllers possess nonstationary characteristics. This paper presents an integrated synthesis method of both motion and vibration controller maintaining the robustness of the control by using a time-varying criterion function. In this method, a smooth change from H2 positioning control to H vibration control is realized by solving time-varying Riccati equations in stead of time-invariant Riccati equations. This method is applied to a positioning problem of flexible tower-like structure. In comparison with the former methods proposed by the authors, the usefulness of the method is verified theoretically and experimentally.

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Active vibration control of a kitchen hood via piezoelectric patch

2009 IEEE International Conference on Control Applications ◽

10.1109/cca.2009.5280984 ◽

2009 ◽

Author(s):

Cristiano Spelta ◽

Fabio Previdi ◽

Damiano Belloli ◽

Matteo Madaschi ◽

Enrico Silani ◽

...

Keyword(s):

Vibration Control ◽

Active Vibration Control ◽

Piezoelectric Patch ◽

Active Vibration

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Positioning and Vibration Control of Time-Varying Vibration Systems by Means of Nonstationary Optimal Regulator

Volume 5: 19th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C ◽

10.1115/detc2003/vib-48564 ◽

2003 ◽

Cited By ~ 5

Author(s):

Susumu Hara ◽

Kenji Nakamura ◽

Tatsuo Narikiyo

Keyword(s):

Wavelet Analysis ◽

Vibration Control ◽

A Priori ◽

Gain Scheduling ◽

Time Varying ◽

Vibration System ◽

Line Measurement ◽

Time Varying Parameter ◽

On Line ◽

Optimal Regulator

This study discusses the positioning and vibration control of time-varying vibration systems whose parameters are time-varying. We assume that the time-varying parameter of a vibration system is detected by an on-line measurement or Wavelet analysis. This paper treats two control methods based on nonstationary optimal regulators (NORs) for this problem. The first method is a gain-scheduling of NORs. An actual controller is obtained by the interpolation of plural NORs designed a priori. The other one is an NOR design based on Wavelet analysis of the vibration system. In the second case, single NOR derived from the analysis result is applied. This study shows the effectiveness of these methods by numerical calculations and experiments. From the comparison of these methods, this paper suggests suitable applications of NOR according to the characteristics of each control problem.

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Smart panel with piezoelectric patches connected to adaptive multi-resonant shunts for broadband vibration control

The Journal of the Acoustical Society of America ◽

10.1121/1.5147537 ◽

2020 ◽

Vol 148 (4) ◽

pp. 2718-2718

Author(s):

Paolo Gardonio ◽

Gabriel Konda Rodrigues ◽

Loris Dal Bo ◽

Emanuele Turco

Keyword(s):

Vibration Control ◽

Smart Panel

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Designs for an adaptive tuned vibration absorber with variable shape stiffness element

Proceedings of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rspa.2005.1547 ◽

2005 ◽

Vol 461 (2064) ◽

pp. 3955-3976 ◽

Cited By ~ 21

Author(s):

Philip Bonello ◽

Michael J Brennan ◽

Stephen J Elliott ◽

Julian F.V Vincent ◽

George Jeronimidis

Keyword(s):

Vibration Control ◽

Shape Change ◽

Excitation Frequency ◽

Variable Stiffness ◽

Experimental Results ◽

Vibration Absorber ◽

Time Varying ◽

Variable Geometry ◽

Curved Beams ◽

Tuned Vibration Absorber

An adaptive tuned vibration absorber (ATVA) with a smart variable stiffness element is capable of retuning itself in response to a time-varying excitation frequency, enabling effective vibration control over a range of frequencies. This paper discusses novel methods of achieving variable stiffness in an ATVA by changing shape, as inspired by biological paradigms. It is shown that considerable variation in the tuned frequency can be achieved by actuating a shape change, provided that this is within the limits of the actuator. A feasible design for such an ATVA is one in which the device offers low resistance to the required shape change actuation while not being restricted to low values of the effective stiffness of the vibration absorber. Three such original designs are identified: (i) A pinned–pinned arch beam with fixed profile of slight curvature and variable preload through an adjustable natural curvature; (ii) a vibration absorber with a stiffness element formed from parallel curved beams of adjustable curvature vibrating longitudinally; (iii) a vibration absorber with a variable geometry linkage as stiffness element. The experimental results from demonstrators based on two of these designs show good correlation with the theory.

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