Application of Spectral and Wavelet Analysis in Power Train System Diagnostic

Brol, S.; Mamala, Jarosław

doi:10.4271/2010-01-0250

Cited by 10 publications

(9 citation statements)

References 2 publications

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“…These requirements bring a potential risk of stick and slip phenomena in bearing mechanisms. This phenomena can be beaten by increase of speed, but the angular velocity cannot be too high because of centrifugal force which can cause vibrations inducted by uneven mass distribution [ 22 , 23 , 24 ]. Therefore, the time between two B samples measurement t s should not exceed the value given by Formula (1).…”

Section: Methodsmentioning

confidence: 99%

Application of Magnetic Sensor for Magnetic Profile (1D) and Surface (2D) Measurement of Automotive Wheels

Brol

2021

Sensors

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This paper shows a report of over three years of intensive work on application of a 3-axis anisotropic magnetoresistive sensor with I2C interface for measurement of magnetic flux density distribution of automotive wheels. The work was undertaken to answer the question of whether is a possibility to effectively apply low-cost magnetic sensors with serial interface to measure the magnetic field surrounding the automotive wheel or tire. Two measurement techniques were discussed: Magnetic profile (1D) and magnetic surface measurement (2D) over tread, and also gear associated with the sensor, as well as its design, layout, operation, and control technique during (1D) and (2D) measurements. Three experiments were performed to asses accuracy and repeatability concerning component and resultant magnetic circumferential profiles and also magnetic surface. Differences between measurement outcomes in experiment were assessed. The results show that accuracy and repeatability lays below maximum admissible uncertainty declared by the producer. This proves directly that there is no measurable influence of motors, gear, operation, or measurement procedure on results obtained by magnetic sensors, and indirectly, that the assumed requirements regarding gear design and parameters are correct, and measurement of magnetic flux density distribution of automotive wheels and tires using (1D) and (2D) techniques is possible using a 3-axis anisotropic magnetoresistive sensor with I2C interface.

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Section: Methodsmentioning

confidence: 99%

Application of Magnetic Sensor for Magnetic Profile (1D) and Surface (2D) Measurement of Automotive Wheels

Brol

2021

Sensors

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“…The experimental results were evaluated in terms of measurement uncertainties [49]. The uncertainty analysis was conducted in accordance with the International Standards Organisation (ISO) Guide to the Expression of Uncertainty in Measurement [50].…”

Section: Appendix Amentioning

confidence: 99%

Pressure Drops in Two-Phase Gas–Liquid Flow through Channels Filled with Open-Cell Metal Foams

Dyga

Brol

2021

Energies

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This paper describes experimental investigations of single-phase and two-phase gas–liquid flow through channels with a diameter of 20 mm and length of 2690 mm, filled with metal foams. Three types of aluminium foams with pore densities of 20, 30 and 40 PPI and porosities ranging from 29.9% to 94.3% were used. Air, water and oil were pumped through the foams. The tests covered laminar, transitional and turbulent flow. We demonstrated that the Reynolds number, in which the hydraulic dimension should be defined based on foam porosity and pore diameter de = ϕdp/(1 − ϕ), can be used as a flow regime assessment criterion. It has been found that fluid pressure drops when flowing through metal foams significantly depends on the cell size and porosity of the foam, as well as the shape of the foam skeleton. The flow patterns had a significant influence on the pressure drop. Among other things, we observed a smaller pressure drop when plug flow changed to stratified flow. We developed a model to describe pressure drop in flow through metal foams. As per the proposed methodology, pressure drop in single-phase flow should be determined based on the friction factor, taking into account the geometrical parameters of the foams. We propose to calculate pressure drop in gas–liquid flow as the sum of pressure drops in gas and liquid pressure drop corrected by the drop amplification factor.

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“…Taking into account the impact of the drive system on tire loads, effective methods of monitoring its technical condition should also be used [3,19]. On the other hand, the deterioration of the belt condition translates into travel safety and tire operating conditions in the contact zone.…”

Section: Introductionmentioning

confidence: 99%

The assessment of the technical condition of a tire belt using computed tomography.

Warczek,

Żak

2024

Eksploatacja i Niezawodność – Maintenance and Reliability

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Car tire belting is a key structural element. Its operation in the tire determines the maintenance of the geometrical stability of the pneumatic wheel in conditions of variable operational loads. The belt creates a spatial composite structure in which the structural component is usually made of braided steel strands. The even arrangement of the fibers in the belt determines its mechanical properties. Under normal conditions, the belting is invisible in used tires and its technical condition is difficult to assess. The arrangement of the belt wires in the tire can be seen using X-ray imaging, which was used in this work. In the conducted research, various configurations of the lamp settings and the detector of the measurement system were tested. On the basis of the tests performed, it is possible to assess irregularities in the belting resulting from manufacturing errors. However, a more important application of the obtained results is the possibility of assessing operating wear. Delamination in the belt detected during the tests reduce the safety of using such tires.

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Application of Spectral and Wavelet Analysis in Power Train System Diagnostic

Cited by 10 publications

References 2 publications

Application of Magnetic Sensor for Magnetic Profile (1D) and Surface (2D) Measurement of Automotive Wheels

Application of Magnetic Sensor for Magnetic Profile (1D) and Surface (2D) Measurement of Automotive Wheels

Pressure Drops in Two-Phase Gas–Liquid Flow through Channels Filled with Open-Cell Metal Foams

The assessment of the technical condition of a tire belt using computed tomography.

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