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Your search keyword '"PCB spindles"' showing total 3 results
Start Over Descriptor "PCB spindles" Topic rigid rotor
3 results on '"PCB spindles"'

1. Experimental and Numerical Dynamic Identification of an Aerostatic Electro-Spindle.

Author

Colombo, Federico, Lentini, Luigi, Trivella, Andrea, Raparelli, Terenziano, and Viktorov, Vladimir

Abstract

Featured Application: Aerostatic spindles are used in high-speed micromachining applications. The main goal of the work is to validate the developed non-linear numerical model through the proposed identification procedure and the performed experimental tests. This paper proposes a method to experimentally identify the main modal parameters, i.e., natural frequencies and damping ratios, of an aerostatic spindle for printed board circuit drilling. A variety of methods is applied to the impulse-response function of the spindle in the presence of zero rotational speed and different supply pressures. Moreover, the paper describes the non-linear numerical model of the spindle, which consists of a four-degree-of-freedom (DOF) rigid and unsymmetrical rotor supported by two aerostatic bearings. The main goal of the work is to validate the developed non-linear numerical model through the proposed identification procedure and the performed experimental tests. The comparison proves satisfactory, and the possible sources of uncertainty are conjectured. [ABSTRACT FROM AUTHOR]

Published
2021
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2. Gas Bearings: Modelling, Design and Applications.

Author

Raparelli, Terenziano, Colombo, Federico, Lentini, Luigi, Raparelli, Terenziano, and Trivella, Andrea

Subjects
History of engineering & technology, Technology: general issues, PCB spindles, aerostatic journal bearings, aerostatic spindle, air-bearing, annular-thrust bearing, bump foil gas bearing, complex exponential method, cylindricity, damping factor identification, dispersion coefficient, dynamic coefficients, dynamic identification, eccentricity, finite element method, fluid-structure interaction, foil bearing, force coefficients, gas bearing, gas bearings, half-power method, industrial application, logarithmic decrement method, modal analysis, n/a, numerical simulation, optimal design, partial arc, porous bearing, porous materials, precision positioning, restrictor geometrical parameters, rigid rotor, rotation accuracy, rotordynamics, roundness, structural dimension, temperature field, thermal characteristics analysis, thermo-hydrodynamic model, tilting, tilting velocity, tribotronics, turbo machinery
Abstract

Summary: This book focuses on the modelling and the design process of gas bearings, on the experimental validation of such models, and on their applications. In particular, recent developments about foil bearings, aerostatic bearings, porous bearings, and non-contact precision positioning systems are shown.

3. Experimental and Numerical Dynamic Identification of an Aerostatic Electro-Spindle

Author

LUIGI LENTINI, Federico Colombo, Andrea Trivella, Terenziano RAPARELLI, and VLADIMIR VIKTOROV

Subjects
Fluid Flow and Transfer Processes, aerostatic journal bearings, PCB spindles, dynamic identification, logarithmic decrement method, complex exponential method, half-power method, damping factor identification, rigid rotor, modal analysis, Technology, QH301-705.5, Process Chemistry and Technology, Physics, QC1-999, General Engineering, Engineering (General). Civil engineering (General), Computer Science Applications, Chemistry, General Materials Science, TA1-2040, Biology (General), Instrumentation, QD1-999
Abstract

This paper proposes a method to experimentally identify the main modal parameters, i.e., natural frequencies and damping ratios, of an aerostatic spindle for printed board circuit drilling. A variety of methods is applied to the impulse-response function of the spindle in the presence of zero rotational speed and different supply pressures. Moreover, the paper describes the non-linear numerical model of the spindle, which consists of a four-degree-of-freedom (DOF) rigid and unsymmetrical rotor supported by two aerostatic bearings. The main goal of the work is to validate the developed non-linear numerical model through the proposed identification procedure and the performed experimental tests. The comparison proves satisfactory, and the possible sources of uncertainty are conjectured.

Published
2021

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