Vibration suppression of a car engine frame via tuned vibration absorber design

Abstract This paper presents an influence region analysis for an actively tuned vibration absorber, the Delayed Resonator (DR). DR is shown to respond to tonal excitations with time varying frequencies [1–3]. The vibration suppression is most effective at the point of attachment of the absorber to the primary structure. In this study we show that proper feedback control on the absorber can yield successful vibration suppression at points away from this point of attachment. The form and the size of such “influence region” strongly depend on the structural properties of the absorber and the primary system. There are a number of questions addressed in this paper: a) Stability of vibration absorption, considering that a single absorber is used to suppress oscillations at different locations. b) Possible common operating frequency intervals in which the suppression can be switched from one point on the structure to the others. A three-degree-of-freedom system is taken for as example case. One single DR absorber is demonstrated to suppress the oscillations at one of the three masses at a given time. Instead of an “influence region” a set of “influence points” is introduced. An analysis method is presented to find the common frequency interval in which the DR absorber operates at all three influence points.

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Vibration suppression of a car engine frame via tuned vibration absorber design

International Journal of Vehicle Noise and Vibration ◽

10.1504/ijvnv.2020.10034836 ◽

2020 ◽

Vol 16 (1/2) ◽

pp. 13

Author(s):

Ai Bao Chai ◽

Hoon Kiat Ng ◽

Jun Wei Sam ◽

Hock Khuen Cheow ◽

Jee Hou Ho

Keyword(s):

Vibration Suppression ◽

Vibration Absorber ◽

Tuned Vibration Absorber

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Design of a slender turning cutting tool via a vibration absorber equipped with piezoelectric ceramic

Journal of Vibration and Control ◽

10.1177/10775463211014414 ◽

2021 ◽

pp. 107754632110144

Author(s):

Yiqing Yang ◽

Haoyang Gao ◽

Qiang Liu

Keyword(s):

Piezoelectric Ceramic ◽

Cutting Tool ◽

Vibration Suppression ◽

Equations Of Motion ◽

Electrical Energy ◽

Diameter Ratio ◽

Vibration Absorber ◽

Machined Surface ◽

Structural Part ◽

Machined Surface Roughness

Turning cutting tool with large length–diameter ratio has been essential when machining structural part with deep cavity and in-depth hole features. However, chatter vibration is apt to occur with the increase of tool overhang. A slender turning cutting tool with a length–diameter ratio of 7 is developed by using a vibration absorber equipped with piezoelectric ceramic. The vibration absorber has dual functions of vibration transfer to the absorber mass and vibration conversion to the electrical energy via the piezoelectric effect. Equations of motion are established considering the dual damping from the piezoelectric ceramic and rubber gasket. The equivalent damping of piezoelectric ceramic is derived, and the geometries are optimized to achieve optimal vibration suppression. The modal analysis demonstrates that the cutting tool with the vibration absorber can reach 80.1% magnitude reduction. Machining tests are carried out in the end. The machining acceleration and machined surface roughness validate the vibration suppression of the VA, and the output voltage by the piezoelectric ceramic demonstrates the ability of vibration sensing.

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Development of an MRE adaptive tuned vibration absorber with self-sensing capability

Smart Materials and Structures ◽

10.1088/0964-1726/24/9/095012 ◽

2015 ◽

Vol 24 (9) ◽

pp. 095012 ◽

Cited By ~ 14

Author(s):

Shuaishuai Sun ◽

Jian Yang ◽

Weihua Li ◽

Huaxia Deng ◽

Haiping Du ◽

...

Keyword(s):

Vibration Absorber ◽

Tuned Vibration Absorber

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Vibration control using a beam-like adaptive tuned vibration absorber with an actuator-incorporated mass element

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1243/09544062jmes1301 ◽

2009 ◽

Vol 223 (7) ◽

pp. 1555-1567 ◽

Cited By ~ 10

Author(s):

P Bonello ◽

K H Groves

Keyword(s):

Vibration Control ◽

Effective Mass ◽

Tuning Range ◽

Excitation Frequency ◽

Vibration Absorber ◽

Time Varying ◽

Additional Advantage ◽

Expected Performance ◽

Vibration Attenuation ◽

Tuned Vibration Absorber

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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