Broadband damping of non-rigid-body resonances of planar positioning stages by tuned mass dampers

Verbaan, Cornelis A.M.; Rosielle, P.C.J.N.; Steinbuch, M Maarten

doi:10.1016/j.mechatronics.2013.12.013

Cited by 13 publications

(10 citation statements)

References 12 publications

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“…Besides, due to the fact that the absorber is never ideal, the vibration is not damped entirely even if the vibration frequency is identical with the natural frequency of the absorber. In order to extend applicable range of frequencies where the absorber is effective, methods for tuning the mechanical parameters of the absorber, particularly the stiffness of the dampers [1], [3], have been developed, see also [4] for broad-band damping tuned mass-damper design.…”

Section: Introductionmentioning

confidence: 99%

Optimized design of robust resonator with distributed time-delay

Pilbauer

Vyhlídal

Michiels

2019

Journal of Sound and Vibration

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An extension of the well-known delayed resonator concept is proposed with the objective to enhance its robustness in vibration suppression under guaranteeing stability of the overall set up. The novel resonator feedback is based on an acceleration measurements passing through a delay of polynomial distribution. The feedback design is formulated as an optimization problem over the parameter set formed by the polynomial coefficients and the gain of the delay free part. The first objective is to minimize the sensitivity of the resonator performance with respect to variations of the excitation frequency, i.e. to widen its frequency stop-band centered at the nominal excitation frequency. The second, equally significant objective is to guarantee that this does not lead to instability of the overall mechanical system coupled with the absorber and to ensure sufficient stability margin. The arising non-convex and non-smooth optimization problem is widely discussed and a penalty method is developed, where the unconstrained problem in every iteration step is solved using available software tools for optimization and spectral design of time delay systems. The proposed design technique is validated by simulations for two case study examples.

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Section: Introductionmentioning

confidence: 99%

Optimized design of robust resonator with distributed time-delay

Pilbauer

Vyhlídal

Michiels

2019

Journal of Sound and Vibration

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“…These observations lead to a continuous research effort to increase damping in mechanical designs (Soovere and Drake 1985;Johnson 1995). One method to add damping to a range of resonance frequencies is by adding separate dampers (Verbaan et al 2013), which shows a method in which the damping of the resonant modes is increased by adding mechanical damping units to the motion stages' corners. These units consist of a mass, mounted on a parallel spring-damper configuration.…”

Section: Influence Of Dampingmentioning

confidence: 99%

“…The third challenge is the relatively high damping value that has to be realized in that small volume. As solution to these problems, a fluid damper design based on an ultra-high-viscosity Newtonian fluid is proposed in (Verbaan et al 2013).…”

Section: Influence Of Dampingmentioning

confidence: 99%

Linear viscoelastic fluid characterization of ultra-high-viscosity fluids for high-frequency damper design

2015

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This paper presents the use of a state of the art damper for high-precision motion stages as a sliding plate rheometer for measuring linear viscoelastic properties in the frequency range of 10 Hz-10 kHz. This device is relatively cheap and enables to obtain linear viscoelastic (LVE) fluid models for practical use in precision mechanics applications. This is an example of reversed engineering, i.e., turning a machine part into a material characterization device. Results are shown for a high-viscosity fluid. The first part of this paper describes the damper design that is based on a high-viscosity fluid. This design is flexure-based to minimize parasitic nonlinear forces such as hysteresis and stick-slip. In the second part of the paper, LVE fluid characterization by means of the damper setup is presented. Measurements are performed and model parameters are fitted by a non-convex optimization algorithm in order to obtain the frequency-dependent behavior of the fluid. The resulting fluid model is validated by comparison with a second measurement with a different damper geometry. This paper shows that LVE fluid characterization between 10 Hz and 10 kHz for elastic high-viscosity fluids is possible with a motion stage damper for which the undamped behavior is known.

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“…The frequency band where the classical passive absorber suppresses vibrations efficiently is relatively narrow, being centered at the natural frequency of the absorber. Thus, the tunable (Verbaan, et al, 2014) and especially the fully active absorbers can significantly improve the vibration suppression efficiency in a wide frequency band. Another reason for the active additional structure is that robots operating in large workspaces usually have strong variability of eigenfrequencies and eigenmodes in different work positions.…”

Section: Introductionmentioning

confidence: 99%

“…Passive and active absorbers have been widely used for vibration suppression. The benefit of mounting a passive vibration absorber on the primary structure with the objective of amplitudes reducing has been known for decades (Lin, et al, 2015; Rana and Soong, 1998; Verbaan, et al, 2014). The frequency band where the classical passive absorber suppresses vibrations efficiently is relatively narrow, being centered at the natural frequency of the absorber.…”

Section: Introductionmentioning

confidence: 99%

Mechatronic robot arm with active vibration absorbers

Kraus

Šika

Beneš

et al. 2020

Journal of Vibration and Control

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Serial robots are typically able to cover large workspace, but their mass/stiffness ratio does not allow combining high accuracy and high dynamic of the end effector operations. Widely spread usage of serial robots, even for tasks such as drilling, leads to high accuracy demands through its workspace. Absolute measurement of the end point for position feedback can be challenging due to objects or even a workpiece in the workspace. Moreover, inbuilt motors of the serial robot cannot response in the frequency range high enough as vibration of the end point. Instead, an additional spring–mass system is attached to the robot to suppress vibrations. The narrow frequency range of a passive dynamic absorber can be extended with active elements between the robot and absorber. An active approach is also necessary because of robots eigenfrequencies and eigenmodes variability. The study deals with a planar flexible robot equipped with a three-degree-of-freedom planar active absorber. The absorber is tuned passively to one value of multiple eigenfrequency. The linear-quadratic regulator control with a state observer has been designed as an active absorber control algorithm. Feedback inputs are absorber body acceleration, end effector acceleration, and relative motions in three absorber actuators realized by voice coils. The end effector vibration suppression along the robot trajectory is achieved using gain scheduling of local controller’s outputs.

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Broadband damping of non-rigid-body resonances of planar positioning stages by tuned mass dampers

Cited by 13 publications

References 12 publications

Optimized design of robust resonator with distributed time-delay

Optimized design of robust resonator with distributed time-delay

Linear viscoelastic fluid characterization of ultra-high-viscosity fluids for high-frequency damper design

Mechatronic robot arm with active vibration absorbers

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