Torsional vibrator

Details Torsional vibrator Torsional vibrator

1996-11-18

1997-11-25

Dougherty, Elizabeth L.

Measuring and testing

Vibration

Vibrator

G01M 332

Patent

active

056914776

ABSTRACT:
A torsional vibrator comprises a direct-current electric motor provided with induced windings supplied with direct current through inverter means capable of changing their polarity in an alternating manner with a preselected frequency. To a shaft of the electric motor a wheel is made integral that is formed by a rim and by a tire and acceleration transducers are associated with the rim and with the tire of the wheel. The shaft of the motor is driven to execute angular oscillations that torsionally excite said wheel and cause it to vibrate in rotational direction. The acceleration transducers detect rotational vibrations and provide measurements of acceleration of the rim and of the tire.

REFERENCES:
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patent: 5543956 (1996-08-01), Nakagawa et al.
P.W.A. Zegelaar et al, "Tyre Models for the Study of In-Plane Dynamics" The Dynamics of Vehicle on Roads and on Tracks, Supplement to Vehicle System Dynamics, vol. 23, pp. 578-590 (1994).

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