How to search?
advanced search

Search results

Filters

  • Journals
  • Date

Search results

Number of results: 3
items per page: 25 50 75
Sort by:

Variable Sound Insulation Structure with MFC Elements

Paweł Górski Michał Kozupa
Archives of Acoustics | 2012 | vol. 37 | No 1 | 115-120 | DOI: 10.2478/v10168-012-0016-5
Keywords sound insulation active noise reduction MFC
Download PDF Download RIS Download Bibtex

Abstract

Additional sound sources are used as actuators in the vast majority of active noise reduction systems. One of the possible opportunities to extend the field of applications of active noise reduction systems is using active structures of variable sound insulation. The paper presents an analysis of ways of reducing noise with a structure of variable sound insulation consisting of a metal plate, active elements (Macro Fiber Composite), and a control system. The paper presents results of acoustic radiation simulations and measurements of sound intensity generated by the structure under the influence of stimulation by an acoustic wave. Simulations of mechanical vibrations and acoustic radiation for the plate were performed with the finite element method and ANSYS software. Simulation results made it possible to select locations for gluing the active elements and sensors. Analyses of the sound pressure level in the space to which the plate is radiating made it possible to determine dominant frequencies in the characteristics and, as a result, indicate vibration modes that can be reduced. Sound intensity measurements were performed with a three-way probe of USP mini Microflown. Results of simulations and measurements show that it is possible to achieve an improvement of the insulating power of a metal plate by approx. 10 dB.

Go to article

Authors and Affiliations

Paweł Górski
Michał Kozupa

Use of an active element for dynamic control of a thin-walled laminated beam with kinematic excitation

Jarosław Gawryluk Andrzej Mitura Andrzej Teter
Archive of Mechanical Engineering | 2019 | vol. 66 | No 3 | 379-387 | DOI: 10.24425/ame.2019.129681
Keywords proportional control composite beam MFC dynamics FEM
Download PDF Download RIS Download Bibtex

Abstract

The paper describes the dynamics of a composite cantilever beam with an active element. The vibrations of the kinematically excited beam are controlled with the use of a Macro Fiber Composite actuator. A proportional control algorithm is considered. During the analysis, actuator is powered by a time-varying voltage signal that is changed proportionally to the beam deflection. The MFC element control system with the implemented algorithm allowed for changing the stiffness of the tested structure. This is confirmed by the numerical and experimental results. Resonance curves for the beam with and without control are determined. The results show a very good agreement in qualitative terms.

Go to article

Bibliography

[1] R.B.Williams, G. Park, D.J. Inman, and W.K.Wilkie. An overview of composite actuators with piezoceramic fibers. In: Proceedings of 20th International Modal Analysis Conference, Los Angeles, CA, 4–7 February, 2002, SPIE – The International Society for Optical Engineering, 4753:421–427, 2002.
[2] B.W. Lacroix. On the mechanics, computational modeling and design implementation of piezoelectric actuators on micro air vehicles. Ph.D. Thesis, University of Florida, Gainesville, USA, 2013.
[3] T.A. Probst. Evaluating the Aerodynamic Performance of MFC-Actuated Morphing Wings to Control a Small UAV. Masters Thesis, Virginia Polytechnic Institute and State University, Blacksburg, USA, 2012.
[4] M. Borowiec, M. Bochenski, J. Gawryluk, and M. Augustyniak. Analysis of the macro fiber composite characteristics for energy harvesting efficiency. In: Awrejcewicz J., editor, Dynamical Systems: Theoretical and Experimental Analysis, vol. 182 of Springer Proceedings in Mathematics and Statistics Series, pages 27–37, 2016. doi: 10.1007/978-3-319-42408-8_3.
[5] J. Latalski. Modelling of macro fiber composite piezoelectric active elements in ABAQUS system. Eksploatacja i Niezawodność – Maintenance and Reliability, 52(4):72–78, 2011.
[6] A. Teter and J. Gawryluk. Experimental modal analysis of a rotor with active composite blades. Composite Structures, 153:451–467, 2016. doi: 10.1016/j.compstruct.2016.06.013.
[7] J. Gawryluk, A. Mitura, and A. Teter. Influence of the piezoelectric parameters on the dynamics of an active rotor. AIP Conference Proceedings, 1922(100010):1–8, 2018. doi: 10.1063/1.5019095.
[8] A. Mitura, J. Gawryluk, and A. Teter. Numerical and experimental studies on the rotating rotor with three active composite blades. Eksploatacja i Niezawodność – Maintenance and Reliability, 4(19):572–581, 2017. doi: 10.17531/ein.2017.4.11.
[9] J. Gawryluk, A. Mitura, and A. Teter. Dynamic response of a composite beam rotating at constant speed caused by harmonic excitation with MFC actuator. Composite Structures, 210:657–662, 2019. doi: 10.1016/j.compstruct.2018.11.083.
[10] M. Rafiee, F. Nitzsche, and M. Labrosse. Dynamics, vibration and control of rotating composite beams and blades: A critical review. Thin-Walled Structures, 119:795–819, 2017. doi: 10.1016/j.tws.2017.06.018.
[11] R. Alkhatib and M.F. Golnaraghi. Active structural vibration control: a review. The Shock and Vibration Digest, 35(5):367–383, 2003.
[12] P.P. Friedmann. On-blade control of rotor vibration, noise, and performance: just around the corner? Journal of the American Helicopter Society, 59(4):1–37, 2014. doi: 10.4050/JAHS.59.041001.
[13] J.X. Gao and W.H. Liao. Vibration analysis of simply supported beams with enhanced selfsensing active constrained layer damping treatments. Journal of Sound and Vibration, 280(1-2):329–357, 2005. doi: 10.1016/j.jsv.2003.12.019.
[14] J.C. Lin and M.H. Nien. Adaptive control of a composite cantilever beam with piezoelectric damping-modal actuators/sensors. Composite Structures, 70(2):170–176, 2005. doi: 10.1016/j.compstruct.2004.08.020.
[15] H.A. Sodano. Macro-Fiber Composites for Sensing, Actuation and Power Generation. Masters Thesis, Virginia Polytechnic Institute and State University, Blacksburg, USA, 2003.
Go to article

Authors and Affiliations

Jarosław Gawryluk
1
Andrzej Mitura
1
Andrzej Teter
1
  1. Department of Applied Mechanics, Mechanical Engineering Faculty, Lublin University of Technology, Lublin, Poland.

MFC Sensors and Actuators in Active Vibration Control of the Circular Plate

Lucyna Leniowska Dominik Mazan
Archives of Acoustics | 2015 | vol. 40 | No 2 | 257-265 | DOI: 10.1515/aoa-2015-0028
Keywords MFC elements active methods parametric identification ARX model plate vibration suppression
Download PDF Download RIS Download Bibtex

Abstract

In this paper, the MFC sensor and actuators are applied to suppress circular plate vibrations. It is assumed that the system to be regulated is unknown. The mathematical model of the plate was obtained on the base of registration of a system response on a fixed excitation. For the estimation of the system’s behaviour the ARX identification method was used to derive the linear model in the form of a transfer function of the order nine. The obtained model is then used to develop the linear feedback control algorithm for the cancellation of vibration by using the MFC star-shaped actuator (SIMO system). The MFC elements location is dealt with in this study with the use of a laser scanning vibrometer. The control schemes presented have the ability to compute the control effort and to apply it to the actuator within one sampling period. This control scheme is then illustrated through some numerical examples with simulations modelling the designed controller. The paper also describes the experimental results of the designed control system. Finally, the results obtained for the considered plate show that in the chosen frequency limit the designed structure of a closed-loop system with MFC elements provides a substantial vibration suppression.
Go to article

Authors and Affiliations

Lucyna Leniowska
Dominik Mazan

This page uses 'cookies'. Learn more