A novel method for the measurement of mechanical mobility

Sands, S.A.; Camilleri, Peter; Breuer, Rebecca; Cambrell, G.K.; Alfredson, R.J.; Skuza, Elizabeth M.; Berger, Philip J.; Wilkinson, Marcia

doi:10.1016/j.jsv.2008.08.012

Cited by 6 publications

(4 citation statements)

References 41 publications

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“…Various electrodynamic inertial exciters are commercially available that can suit a wide range of dynamic structures. In addition, the mass-loading effect exerted upon the structure by the actuator can also be removed mathematically, allowing measurement of the unloaded mobility characteristics as described in [15]. However, one drawback of such a mobility measuring device based on an electrodynamic inertial exciter is that it is coupled to the structure through a relatively large mounting base, which can hardly be considered as a point.…”

Section: Discussionmentioning

confidence: 99%

“…Compared to the concept proposed by Sands et al [15] which is also based on a voice coil actuator, the SMMD is developed from an "off-the-shelf" inertial exciter and does not require extra sensor to determine the mobility function of the structure under test. Using a SMMD, strong electric signals lead to a very good Signal-to-Noise Ratio and the mobility function of the structure can be evaluated by a single measurement for a broad frequency range, typically from 100 Hz to 1 kHz with the current SMMD prototype, using a sweep or random test signal over a duration of about one minute.…”

Section: Discussionmentioning

confidence: 99%

“…The two sensors are actually placed strategically on the actuator frame and proof mass, allowing the mass-loading effect of the device on the structure to be removed. The feasibility of the method was validated in [15] on a cantilever beam. Although this approach overcomes some practical limitations encountered in impact testing and shaker testing, such as allowing better control over the frequency, amplitude and duration of the force excitation applied to the structure while compensating the mass-loading effect of the actuator on the structure, it requires developing a specific device.…”

Section: Introductionmentioning

confidence: 99%

“…This paper intends to simplify the mobility measuring device proposed by Sands et al [15] by jointly using the self-sensing capabilities of the inertial exciter, as suggested in Ref. [10]…”

Section: Introductionmentioning

confidence: 99%

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A sensorless method for measuring the point mobility of mechanical structures

Boulandet

Michau

Herzog

et al. 2016

Journal of Sound and Vibration

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This paper presents a convenient and cost-effective experimental tool for measuring the mobility characteristics of a mechanical structure. The objective is to demonstrate that the point mobility measurement can be performed using only an electrodynamic inertial exciter. Unlike previous work based on voice coil actuators, no load cell or accelerometer is needed. Instead, it is theoretically shown that the mobility characteristics of the structure can be estimated from variations in the electrical input impedance of the

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…This paper intends to simplify the mobility measuring device proposed by Sands et al [15] by jointly using the self-sensing capabilities of the inertial exciter, as suggested in Ref. [10]…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations