Modelling and Experimental Investigation of an Active Damper
This paper presents a validation methodology of the dynamic behavior of an active viscous damper. The damper has two flexible metallic bellows connected to a rigid reservoir filled with fluid. When one of the bellows is connected to a vibrating structure a periodic flow passes through a variable int...
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| Format: | Article |
| Language: | English |
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Wiley
2006-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2006/486719 |
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| author | Rafael Luís Teixeira Francisco Paulo Lépore Neto José Francisco Ribeiro |
| author_facet | Rafael Luís Teixeira Francisco Paulo Lépore Neto José Francisco Ribeiro |
| author_sort | Rafael Luís Teixeira |
| collection | DOAJ |
| description | This paper presents a validation methodology of the dynamic behavior of an active viscous damper. The damper has two flexible metallic bellows connected to a rigid reservoir filled with fluid. When one of the bellows is connected to a vibrating structure a periodic flow passes through a variable internal orifice and the damping effect is produced. The size of the orifice is adjusted by a controlled linear piezoelectric actuator that positions the conical core into a conical cavity. The device finite element structural model consists of the valve body and its conical core that are assumed rigid and the flexible bellows are represented by two pistons with elastic suspensions. The flow developed inside the damper is modeled considering the fluid-structure interation, using the Lagrangean-Eulerian formulation. To validate the proposed model a prototype was constructed and experimental tests and numerical simulations are accomplished in the time domain, applying harmonic excitations. The results are compared using curves that relate the damping coefficient with the orifice size and with the input velocity applied at the bellows face. However, for the proper control design and system operation, the direct use of the finite element model becomes unviable due to its high computational time. Then, a reduced second order discrete dynamic model for the damper was developed. The model parameters are identified by analysis in the frequency domain, using impulsive excitation force, for constant and variable orifice sizes. At low excitation frequencies, the damper prototype behaves like a single degree of freedom system which damping factor changes with the orifice size A fuzzy controller was designed and it generates the orifice reference size associated to the desired damping factor. The active system presented better performance when compared to the passive one. |
| format | Article |
| id | doaj-art-5efa889d670a4651bef983f164746692 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2006-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-5efa889d670a4651bef983f1647466922025-02-03T06:00:17ZengWileyShock and Vibration1070-96221875-92032006-01-01134-534335410.1155/2006/486719Modelling and Experimental Investigation of an Active DamperRafael Luís Teixeira0Francisco Paulo Lépore Neto1José Francisco Ribeiro2College of Mechanical Engineering, Federal University of Uberlândia, Campus Santa Mônica, 38400-089, Uberlândia-MG, BrazilCollege of Mechanical Engineering, Federal University of Uberlândia, Campus Santa Mônica, 38400-089, Uberlândia-MG, BrazilCollege of Mechanical Engineering, Federal University of Uberlândia, Campus Santa Mônica, 38400-089, Uberlândia-MG, BrazilThis paper presents a validation methodology of the dynamic behavior of an active viscous damper. The damper has two flexible metallic bellows connected to a rigid reservoir filled with fluid. When one of the bellows is connected to a vibrating structure a periodic flow passes through a variable internal orifice and the damping effect is produced. The size of the orifice is adjusted by a controlled linear piezoelectric actuator that positions the conical core into a conical cavity. The device finite element structural model consists of the valve body and its conical core that are assumed rigid and the flexible bellows are represented by two pistons with elastic suspensions. The flow developed inside the damper is modeled considering the fluid-structure interation, using the Lagrangean-Eulerian formulation. To validate the proposed model a prototype was constructed and experimental tests and numerical simulations are accomplished in the time domain, applying harmonic excitations. The results are compared using curves that relate the damping coefficient with the orifice size and with the input velocity applied at the bellows face. However, for the proper control design and system operation, the direct use of the finite element model becomes unviable due to its high computational time. Then, a reduced second order discrete dynamic model for the damper was developed. The model parameters are identified by analysis in the frequency domain, using impulsive excitation force, for constant and variable orifice sizes. At low excitation frequencies, the damper prototype behaves like a single degree of freedom system which damping factor changes with the orifice size A fuzzy controller was designed and it generates the orifice reference size associated to the desired damping factor. The active system presented better performance when compared to the passive one.http://dx.doi.org/10.1155/2006/486719 |
| spellingShingle | Rafael Luís Teixeira Francisco Paulo Lépore Neto José Francisco Ribeiro Modelling and Experimental Investigation of an Active Damper Shock and Vibration |
| title | Modelling and Experimental Investigation of an Active Damper |
| title_full | Modelling and Experimental Investigation of an Active Damper |
| title_fullStr | Modelling and Experimental Investigation of an Active Damper |
| title_full_unstemmed | Modelling and Experimental Investigation of an Active Damper |
| title_short | Modelling and Experimental Investigation of an Active Damper |
| title_sort | modelling and experimental investigation of an active damper |
| url | http://dx.doi.org/10.1155/2006/486719 |
| work_keys_str_mv | AT rafaelluisteixeira modellingandexperimentalinvestigationofanactivedamper AT franciscopauloleporeneto modellingandexperimentalinvestigationofanactivedamper AT josefranciscoribeiro modellingandexperimentalinvestigationofanactivedamper |