Measurement of Unloaded and Loaded Multidirectional Mobilities

Format:

Conference/Event

Author/Creator:

Ivarsson, L. H., author.

Conference Name:

SAE 2005 Noise and Vibration Conference and Exhibition (2005-05-16 : Grand Traverse, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

The paper describes a technique to determine the full 6 by 6 mobility matrix of a point (including rotational degrees of freedom) from measurements. The determination is performed without loading from the excitation equipment (lever, force transducers et cetera) and uses only one set-up. The advantages of using only one set-up are that an improved consistency of the mobility matrix is achieved in comparison to traditional techniques, and that it saves set-up time which usually is a large portion of the total time required for the actual measurements.The measurements are performed in two steps. During the first step, the mass- and inertia-loaded mobility matrix is determined by using sequential measurements and a physical model of the excitation equipment.The loaded mobility matrix determined for two structures first a 3-dimensional beam-structure where results are compared to FE-calculations and secondly on a wheel suspension on a car.In a second step, the loaded mobility matrix is used to actively compensate for the mass and inertia of the excitation equipment; thereafter the unloaded mobility matrix is obtained. The second step is explained theoretically and is demonstrated experimentally for 2-DOFs (translation and rotation) for a freely suspended beam vibrating in bending motion

Notes:

Vendor supplied data

Publisher Number:

2005-01-2268

Access Restriction:

Restricted for use by site license