1. Experimental and Numerical Dynamic Identification of an Aerostatic Electro-Spindle
- Author
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Federico Colombo, Luigi Lentini, Andrea Trivella, Terenziano Raparelli, and Vladimir Viktorov
- Subjects
aerostatic journal bearings ,PCB spindles ,dynamic identification ,logarithmic decrement method ,complex exponential method ,half-power method ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,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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