Vibration absorbers for chatter suppression: A new analytical tuning methodology

Sims, Neil D.

doi:10.1016/j.jsv.2006.10.020

Cited by 179 publications

(111 citation statements)

References 21 publications

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“…Figure 1 shows the stability chart in the dimensionless space Ω d , p (Ω d is the dimensionless spindle speed) for a system without and with LTVA and clearly illustrates the advantage given by the absorber in terms of stability. Equations for obtaining an almost optimal linear tuning of the absorber are given in [5] .…”

Section: Mechanical Model and Stability Analysismentioning

confidence: 99%

“…These include conventional mechanical linear vibration absorbers [5] , vibro-impact absorbers [6] , friction damping absorbers [7] , self-tunable absorbers [8] , piezoelectric absorbers based on shunt circuits [9] and nonlinear energy sinks [10] . Numerical and experimental studies exhibited their promising performance in terms of stabilization of machining operations, allowing larger depth of cut in stable conditions, which enables to increase production speed.…”

Section: Introductionmentioning

confidence: 99%

“…It combines the beneficial effect of a linear absorber, able to enlarge the stable area of operation, with a nonlinear characteristic, which enables it to improve the robustness of the stable chatter-free motion and to avoid bi-stable conditions. It represents a nonlinear extension of the linear tuned vibration absorber (LTVA), as presented in [12] and, for instance, in [5] .…”

Section: Introductionmentioning

confidence: 99%

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Enforcing Linear Dynamics Through the Addition of Nonlinearity

Habib

Grappasonni

Kerschen

2016

Conference Proceedings of the Society for Experimental Mechanics Series

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A passive vibration absorber, termed the nonlinear tuned vibration absorber (NLTVA), is designed for the suppression of chatter vibrations. Unlike most passive vibration absorbers proposed in the literature, the NLTVA comprises both a linear and a nonlinear restoring force. Its linear characteristics are tuned in order to optimize the stability properties of the machining operation, while its nonlinear properties are chosen in order to control the bifurcation behavior of the system and guarantee robustness of stable operation. In this study, the NLTVA is applied to turning machining.

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Section: Mechanical Model and Stability Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enforcing Linear Dynamics Through the Addition of Nonlinearity

Habib

Grappasonni

Kerschen

2016

Conference Proceedings of the Society for Experimental Mechanics Series

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“…On the other hand, continuous improvement has been achieved in the chatter control of boring, including sophisticated methods, such as the use of electro-rheological [28] and magneto-rheological fluids [29] and active dynamic absorbers [30][31][32][33]. However, the use of passive dynamic absorbers [34][35][36][37][38][39] is a simple solution and it is still a promising field of research for chatter suppression, not only in boring operations.…”

Section: Introductionmentioning

confidence: 99%

“…Lee [37] demonstrated that the dynamic response of the cutting tool was improved due to the presence of a passive absorber when the natural frequency of the dynamic vibration absorber was close to the natural frequency of the cutting tool and the absorber had a large damping ratio. Sims [38] proposed an analytical method relevant for a wide range of machining-chatter problems. In turning and boring operations, passive vibration absorbers can be tuned using the analytical technique developed in [38].…”

Section: Introductionmentioning

confidence: 99%

Improvement of chatter stability in boring operations with passive vibration absorbers

Miguélez

Rubio

Loya

et al. 2010

International Journal of Mechanical Sciences

115

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This paper is focused on the behavior of boring bars with a passive dynamic vibration absorber (DVA) for chatter suppression. The boring bar was modeled as a cantilever Euler-Bernoulli beam and only its first mode of vibration was considered. The stability of the two-degree-of-freedom model was analyzed constructing the stability diagram, dependent on the bar characteristics and on the absorber parameters (mass, stiffness, damping, and position). Two analytical approaches for tuning the absorber parameters were compared. The selection criterion consisted on the maximization of the minimum values of the stability-lobes diagram. Subsequent analysis performed in this work, allowed formulating of new analytical expressions for the tuning frequency improving the behavior of the system against chatter.

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Adaptive chatter mitigation control for machining processes with input saturations

Zhang

Huang

et al. 2015

Intl J Robust & Nonlinear

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Chatter is an unstable nonlinear dynamical phenomenon often encountered in machining operations because of the self-excitation mechanism, which may lead to overcut or rapid tool wear, and hence, greatly influence the surface quality and productivity in milling operations. Recent years have witnessed an increasing industrial demand of high quality and high efficiency machining. This paper hereby develops a constrained active adaptive control method to mitigate the chatter dynamics with input saturations. To guarantee the feasibility of the proposed approach, moderate stable conditions of the closed-loop system are afterwards derived by using the LaSalle-Yoshizawa theorem as well. Finally, numerical simulations are conducted to show the substantially enlarged stable region in the Lobe Diagram. Thus, the method can be expected to improve the efficiency of milling processes. ADAPTIVE CHATTER MITIGATION CONTROL 3089 have been devoted to adjust the process parameters such as spindle speed, feed per tooth, pitch angle, and helix angle, which guarantee the system to work in the stable region of the SLD . Meanwhile, some scholars [8][9][10][11][12][13] used sinusoid or triangular spindle speed to disturb the regenerative effect to avoid the unstable region. Still, some other researchers sought assistance from specified actuators like dampers [14] and vibration absorbers [15] to dissipate the chatter energy. These lowcost passive control methods do not require any external power source. However, the practically improvement on damping is rather limited, as the domain of stable operation points toward those of higher productivity can not be enlarged. Consequently, the productivity of passive control-based milling systems is still limited.By comparison, the active control is a more promising one, which installs suitable sensors and actuators (like electrostrictive actuators [16], piezoelectric motors [17], or active magnetic bearing [18]) onto spindles or tool holders to generate desired chatter suppression forces. As representative works, Dohner et al. [19] applied active damping on a milling spindle equipped with two orthogonal pairs of electrostrictive stack. By this means, he developed a linear-quadratic-Gaussian control law to achieve a good balance between performance and robustness. Zhang and Sims [20] improved the workpiece flexibilities by mounting piezoelectric actuators and sensors to thin-walled workpieces, and the stability of high-speed milling machining processes was ensured. Chen and Knospe [2,21] designed -synthesis robust control approaches for speed-independent, speed-specified and speedinterval control, respectively. In 2014, Chen et al. [22] proposed an adaptive control scheme to compensate the regenerative effect especially for high-speed machining cases. Analogously, van. Dijk et al. [4] presented a fixed-structure robust stabilization control method, which transform a nonsmooth constrained optimization problem to an unconstrained non-smooth one. In 2014, Monnin et al. [23,24] developed optimal contro...

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Vibration absorbers for chatter suppression: A new analytical tuning methodology

Cited by 179 publications

References 21 publications

Enforcing Linear Dynamics Through the Addition of Nonlinearity

Enforcing Linear Dynamics Through the Addition of Nonlinearity

Improvement of chatter stability in boring operations with passive vibration absorbers

Adaptive chatter mitigation control for machining processes with input saturations

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