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Meccanica

Erschienen in:

09.05.2017

Actively compensated aerostatic thrust bearing: design, modelling and experimental validation

verfasst von: Federico Colombo, Luigi Lentini, Terenziano Raparelli, Vladimir Viktorov

Erschienen in: Meccanica | Ausgabe 15/2017

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Abstract

Active compensation is an effective method for increasing air bearing static and dynamic performance. This paper describes the design, modelling and experimental validation of an actively compensated externally pressurized gas bearing. The active compensation is obtained through the support compensation strategy. With this strategy, the system’s initial working position is restored by compensating for air gap variations through adjustments to the bearing vertical dimension. The described bearing consists in a conventional thrust bearing which is integrated with a multilayer piezoelectric actuator, a compliant mechanism and a digital controller. Nevertheless the non-linear nature of the air system, a simple linear model results to be an effective choice for neighbour of equilibrium conditions. Results demonstrate the good accuracy of the model and the system’s good capacity of rejecting external force disturbances.

Vorheriger Artikel Numerical calculation of air entrainment rates due to intake vortices

Nächster Artikel Duty cycle and directional jet effects of a plasma actuator on the flow control around a NACA0015 airfoil

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Subscripts written in capital letters refer to physical points of the described mechanical structure.

Laplace domain variables are indicated by capital letters.

This is the maximum voltage of the actuator. The actuator, especially in the presence of high dynamics, has to be supplied up to its maximum nominal voltage (100 V) in order to preserve its performance

The curves designated by continuous lines are a polynomial interpolation of the measured experimental points.

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Titel: Actively compensated aerostatic thrust bearing: design, modelling and experimental validation
verfasst von: Federico Colombo
Luigi Lentini
Terenziano Raparelli
Vladimir Viktorov
Publikationsdatum: 09.05.2017
Verlag: Springer Netherlands
Erschienen in: Meccanica / Ausgabe 15/2017
Print ISSN: 0025-6455
Elektronische ISSN: 1572-9648
DOI: https://doi.org/10.1007/s11012-017-0689-y

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