Reliability of Road Transport Means as a Factor Affecting the Risk of Failure – The Transport Problem Case Study

Trojanowski, Piotr; Trojanowska, Justyna

doi:10.1007/978-3-030-77719-7_26

Cited by 11 publications

(2 citation statements)

References 19 publications

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“…This method includes measures aimed at improving the performance of the mechanized vehicle, diagnostics (assessment of damage based on the diagnostic indicator) and repair work, based on which the concept of risk measures is implemented. As a result of this reliability analysis, one of the conditions is met: suitability or unfitness for operation [10].…”

Section: Introductionmentioning

confidence: 99%

Computer modeling of electromechanical system of two-speed elevator

Nazarova¹,

Osadchyy²,

Shulzhenko³

2022

HAIT

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Today, elevator production in Ukraine needs innovative solutions and changes, because most of the equipment in operation was built and installed in the 70-80s of the last century. Due to the high cost of new frequency-controlled winches and the complexity of maintenance, the search for modernization and improvement of existing elevator winches remains an alternative. No less important stage of operation is diagnostics. Timely detection of damages and forecasting of future failures allow to provide high-quality work during all term of operation, and also to reduce expenses of budgetary funds for difficult repairs. Computer simulation plays an important role in the modern world both during the design of a new elevator and during operation. Thanks to fairly simple and clear programs, it is possible to reproduce not only the standard modes of operation of the mechanisms, but also to perform calculations of future possible faults. The use of visualization facilitates the perception of information for operators, engineers and other users involved. The paper presents a computer model of a two-speed elevator with an induction motor and a reduction winch. The research used Matlab / Simulink software, which is intuitive to use and, in the full sense of the word, informative. The built model of the elevator has feedback on the calculated load of the cabin. The latter is determined by the transients during engine start-up and affects the positioning accuracy at a stop. The dependences of the influence of the degree of cab loading on the positioning accuracy are found. In the second stage, the supply voltage parameter is added. A change in this parameter within ± 10% affected the previous calculations of the loading degree and deteriorated the accuracy by almost three times. At the same time, most indicators (75%) meet the requirements of international standards EN 81-20: 2014 with positioning accuracy in the range of ± 10 mm. In further studies it is planned to use the obtained results to reduce the sensitivity of the algorithm for calculating the loading degree of the cabin to change the supply voltage and ensure the required positioning accuracy in the entire load range of the cabin when changing the supply voltage ± 10 %.

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Section: Introductionmentioning

confidence: 99%

Computer modeling of electromechanical system of two-speed elevator

Nazarova¹,

Osadchyy²,

Shulzhenko³

2022

HAIT

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“…According to research [7,8], this situation has developed due to unprofessional selection of drivers; diffi cult working conditions of the driver when performing TR; unsatisfactory psychophysiological condition and the state of the driver's own health; heavy traffi c. At the same time, in the study [9], the destructive factors that signifi cantly impair the reliability of the TR transport process include the state of vehicle fl eet, which occupies a leading position in the scheme presented by the authors. In general, the study presents the concept of analysis of the reliability of vehicle fl eet under only two conditions: suitable or unsuitable ones, which in some way limits the ability to make management decisions aimed at improving the transport process of TR in a mining company.…”

Section: Introductionmentioning

confidence: 99%

Improving the reliability of trucking in the conditions of a mining enterprise

Kairatkyzy¹,

Karsybayev²,

Abzhapbarova³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. Improving the efficiency of trucking (TR) in the conditions of a mining enterprise by means of developing recommendations aimed at enhancing reliability of the transport process. Methodology. To determine the factors influencing the reliability of TR the Functional Resonance Analysis Method (hereinafter FRAM) was used, which is based on the study on the functions of freight automobile transportation process with respect to six different aspects: time, control, output, resource, prerequisites, and entrance. Findings. The transport process of TR in the conditions of a mining enterprise is represented by five main functions: preparation of TR, supply of the truck for loading, loading of cargo, transportation and unloading of cargo at the destination point. For each function of the transport process TR we determined its variability as based on the accuracy and timeliness of the transport operation; identified factors that affect the reliability of the transport process, namely driver experience, administrative control, time of the transport operation, complexity of the transport operation, workplace ergonomics, workload and stress, the level of management support that may worsen the final result of goods delivery to the point of unloading. It is determined that preparation and transportation of cargo to the destination point is the least reliable function of TR transport process. This is due to the significant changeability and variability, a large number of production tasks and high variable standards of transport work. It is proposed to strengthen the control over the psychophysiological condition of the driver in order to improve the reliability of TR in the conditions of a mining enterprise and to reduce the probability of failures during the performance of transportation work. Originality. It consists in establishing the relationship between the functions and factors of the transport process of TR in the conditions of a mining enterprise, which allows assessment of the reliability level of the task in a timely manner. Practical value. It consists in a quantitative assessment of the impact of transportation process factors on the reliability of TR in the conditions of a mining enterprise.

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