Assessment of disc brake vibration in rail vehicle operation on the basis of brake stand

Sawczuk, Wojciech; Merkisz-Guranowska, Agnieszka; Cañás, Armando Rilo

doi:10.17531/ein.2021.2.2

Cited by 12 publications

(9 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The various values were obtained, despite the fact that the lever mechanism is characterized by a symmetrical construction of the right and left sides. A detailed explanation of this phenomenon is described in [ 37 ]. For further analysis, the results measured on the holder from the side of the brake cylinder were used.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Wear of Disc Brake Friction Linings and the Variability of the Friction Coefficient on the Basis of Vibroacoustic Signals

Sawczuk

Ulbrich

Kowalczyk

et al. 2021

Sensors

Self Cite

View full text Add to dashboard Cite

The article presents the results of friction and vibroacoustic tests of a railway disc brake carried out on a brake stand. The vibration signal generated by the friction linings provides information on their wear and offers evaluation of the braking process, i.e., changes in the average friction coefficient. The algorithm presents simple regression linear and non-linear models for the thickness of the friction linings and the average coefficient of friction based on the effective value of vibration acceleration. The vibration acceleration signals were analyzed in the amplitude and frequency domains. In both cases, satisfactory values of the dynamics of changes above 6 dB were obtained. In the case of spectral analysis using a mid-band filter, more accurate models of the friction lining thickness and the average coefficient of friction were obtained. However, the spectral analysis does not allow the estimation of the lining thickness and the friction coefficient at low braking speeds, i.e., 50 and 80 km/h. The analysis of amplitudes leads to the determination of models in the entire braking speed range from 50 to 200 km/h, despite the lower accuracy compared to the model, based on the spectral analysis. The vibroacoustic literature presents methods of diagnosis of the wear of various machine elements such as bearings or friction linings, based on amplitude or frequency analysis of vibrations. These signal analysis methods have their limitations with regard to their scope of use and the accuracy of diagnosis. There are no cases of simultaneous use of different methods of analysis. This article presents the simultaneous application of the amplitude and frequency methods in the analysis of vibroacoustic signals generated by brake linings. Moreover, algorithms for assessing the wear of friction linings and the average coefficient of friction were presented. The algorithm enables determination of the time at which the friction linings should be replaced with new ones. The final algorithm analyzes the vibration acceleration signals using both amplitude analysis for low braking speeds, as well as spectral analysis for medium and high braking speeds.

show abstract

Section: Resultsmentioning

confidence: 99%

Evaluation of Wear of Disc Brake Friction Linings and the Variability of the Friction Coefficient on the Basis of Vibroacoustic Signals

Sawczuk

Ulbrich

Kowalczyk

et al. 2021

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…With the improved YOLOv3 architecture, Yao, Z [24] et al used the machine vision method to detect foreign bodies, which improved perception and target detection abilities. Several studies have investigated the relationship between mass wear of brake pads and brake process characteristics, and the wear of brake pads has been studied scientifically by Sawczuk W [18] et al An HMCB network combining MSCN and BLSM is proposed by Xue Bin [23] et al to predict RUL. To describe the drift of degenerate trajectory, Rodriguez-Picon LA [16] et al integrated several hazard rate functions in the inverse Gaussian process.…”

Section: Related Workmentioning

confidence: 99%

Camera-based PHM method in rotating machinery equipment micro-action scenarios

An¹,

liu²,

Hao³

et al. 2023

Eksploatacja i Niezawodność – Maintenance and Reliability

View full text Add to dashboard Cite

The health operation of rotating machinery guarantees safety of the project. To ensure a good operating environment, current subway equipment inspections frequency is high, resulting in a waste of resources. Small abnormal changes in mechanical equipment will also contribute to the development of mechanical component defects, which will ultimately lead to the failure of the equipment. Therefore, mechanical equipment defects should be detected and diagnosed as soon as possible. Through the use of graphic processing and deep learning, this paper proposes Rmcad Framework with three aspects: condition monitoring, anomaly detection, defect early warning. Using a network algorithm, this paper proposes an improved model that has the characteristics of two-stream and multi-loss functions, which improves the accuracy of detection. Additionally, a defect warning method is constructed to improve the perception ability of equipment before failure occurs and reduce the frequency of frequent maintenance by detecting anomalies according to the degree of opening.

show abstract

“…The maximum temperature value was 93⁰C on the upper right friction pad, while the lowest contact temperature of the pad with the disc was 74⁰C on the lower left friction pad. In the work [22], the problem of uneven distribution of pad pressures relative to the disc was explained by the change in the geometry of the linkage system and the uneven distribution of the masses of the right and left sides of the linkage mechanism.…”

Section: Modelling Of Brake Pad Mass Wearmentioning

confidence: 99%

“…During these tests, the requirements regarding vibrations and noise generated by the braking systems de-scribed in [16] are additionally checked. The work [22] also indicated the dependence of the weight wear of the friction pads on the vibroacoustic signal generated by the disc brake. All the issues raised require knowledge of the mechanism of friction and wear of friction materials described in works [1,9], which, in addition to models of friction and wear, are based on statistical tests carried out in bench and operational conditions [15].…”

Section: Introductionmentioning

confidence: 98%

Evaluation of weight wear of disc brake pads after test stands

Sawczuk¹,

Cañás²,

Kołodziejski³

2022

Rail Vehicles/Pojazdy Szynowe

Self Cite

View full text Add to dashboard Cite

The article presents the results of the research of a railway disc brake in the evaluation of the weight wear of friction pads. The tests were carried out on a certified brake stand where the friction and mechanical characteristics of the brake are determined. The stand was additionally equipped with a thermal imaging camera to observe the contact of the pads with the brake disc. Attention was also paid to examining the influence of such parameters of the braking process as the contact surface of the pad with the disc, the thickness of the pads as a determinant of their initial wear, the pressure of the pads to the disc, braking mass and braking speed on the weight wear of the friction pads.

show abstract

Assessment of disc brake vibration in rail vehicle operation on the basis of brake stand

Cited by 12 publications

References 32 publications

Evaluation of Wear of Disc Brake Friction Linings and the Variability of the Friction Coefficient on the Basis of Vibroacoustic Signals

Evaluation of Wear of Disc Brake Friction Linings and the Variability of the Friction Coefficient on the Basis of Vibroacoustic Signals

Camera-based PHM method in rotating machinery equipment micro-action scenarios

Evaluation of weight wear of disc brake pads after test stands

Contact Info

Product

Resources

About