Car axle testing on hydropulse

Zbožínek, Vladimír; Tomcik, Petr; Kulhanek, Jiri; Fojtík, Petr; Buran, Michal; Suchanek, Miroslav

doi:10.1109/carpathiancc.2017.7970360

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…The introduction of non-contact measurements into the production process is costly, especially due to difficult conditions of the measurement, but helps to minimize the possible damage. Great advantage of measurement using 2D or 3D scanners when comparing to other methods is that these scanners allow to acquire more values [Vijay 2017, Zbozinek 2017. The scanners can detect defects that would otherwise be hidden and would result in returns made by customers and thus cause great damage to property and reputation of the manufacturer.…”

Section: Introductionmentioning

confidence: 99%

Method of Non-Contact Measuring of Diameter and Ovality of Steel Tubes During Their Production

Fojtik¹,

Podesva²,

Gebauer³

et al. 2019

MM SJ

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The quality of production of metallurgical bar stock, in particular tubes, is assessed based on many production parameters including outer cross section (diameter) and ovality, which are also specified by European standard EN 13 508. Tubes need to be measured as soon as possible, ideally immediately after the rolling mill during their production, so that any defects may be corrected in due time and thus the loss of material and power may be minimized. This means that the tubes need to be measured at high temperatures (approximately 1.000 °C). The article describes a new method of non-contact measuring of outer diameters and ovality of steel tubes cross sections that meets the above-mentioned requirements and allows reliable measuring of required parameters even in the case when the measured material moves or vibrates vertically during measuring.

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Section: Introductionmentioning

confidence: 99%

Method of Non-Contact Measuring of Diameter and Ovality of Steel Tubes During Their Production

Fojtik¹,

Podesva²,

Gebauer³

et al. 2019

MM SJ

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“…Applying the Fast Fourier Transform (FFT) to this time domain data, the natural frequencies and mode shapes of the structure are obtained in the frequency domain. This technique is robust, full-field, and noncontacting; it has been extended in the automotive industry by various researchers [25,26].…”

mentioning

confidence: 99%

An Optical-Based Technique to Obtain Vibration Characteristics of Rotating Tires

Mange¹,

Atkinson²,

Bastiaan³

et al. 2019

SAE Int. J. Veh. Dyn., Stab., and NVH

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The dynamic characteristics of tires are critical in the overall vibrations of vehicles because the tireroad interface is the only medium of energy transfer between the vehicle and the road surface. Obtaining the natural frequencies and mode shapes of the tire helps in improving the comfort of the passengers. The vibrational characteristics of structures are usually obtained by performing conventional impact hammer modal testing, in which the structure is excited with an impact hammer and the response of the structure under excitation is captured using accelerometers. However, this approach only provides the response of the structure at a few discrete locations, and it is challenging to use this procedure for rotating structures. Digital Image Correlation (DIC) helps in overcoming these challenges by providing the full-field response of the structure. Although there have been many experiments on tires, there are few published papers that investigate the full-field dynamics of rotating tires at high rotating speeds. In the current work, the Kettering University Formula SAE (FSAE) vehicle is loaded on a chassis dynamometer for the purpose of performing a tire experiment. A pair of high-speed cameras capture high-resolution images to obtain the response of the tire sidewall in stationary and rotating conditions. The modal characteristics of the tire are obtained by processing these images. The results reveal the resonant frequencies and the operational deflection shapes of the loaded and unloaded tire in stationary and rotating conditions. The current article provides full-field information about the dynamics of tires at high rotating speeds for engineers and scientists in the field.

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