Development of mathematical models for planning the duration of shunting operations

Lashenyh, Olexandr; Турпак, Сергій Миколайович; Gritcay, Sergey; Vasileva, Larysa; Ostroglyad, Elena

doi:10.15587/1729-4061.2016.80752

Cited by 9 publications

(6 citation statements)

References 6 publications

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“…Filtering out of abnormal values results in updated time series which can be further used in modeling and predicting studied indicators in various systems [15][16][17].…”

Section: Effect Of Different Methods Of Abnormal Value Censoration Onmentioning

confidence: 99%

The effect of methods of eliminating spikes in the time series of freight flows on their statistical characteristics

Gritsay

Lashchenykh

Турпак

et al. 2017

EEJET

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“…Filtering out of abnormal values results in updated time series which can be further used in modeling and predicting studied indicators in various systems [15][16][17].…”

Section: Effect Of Different Methods Of Abnormal Value Censoration Onmentioning

confidence: 99%

The effect of methods of eliminating spikes in the time series of freight flows on their statistical characteristics

Gritsay

Lashchenykh

Турпак

et al. 2017

EEJET

Self Cite

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“…Existing procedures to forecast the duration of shunting half-runs are few and are mostly based on a linear model [16]. Some of them try to improve the accuracy of calculations using statistical data and the construction of models of multifactorial regression [17], which also lead to a multivariate linear model.…”

Section: Investigating Approaches To Determining the Du Ration Of Shunting Halfruns At A Technical Station And Their Formalizationmentioning

confidence: 99%

Constructing a model for the automated operative planning of local operations at railroad technical stations

Прокопов

Prokhorov

Калашнікова

et al. 2021

EEJET

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This paper has investigated the technology of forwarding local wagons at railroad technical stations and established the need to improve it given the extra downtime of local wagons. The main issue relates to the considerable combinatorial complexity of the tasks of operational planning. Another problem is that as part of the conventional approach, planning a station operation and planning a local operation at it is considered separately. Another planning issue is the lack of high-quality models for the preparation of initial data, in particular, data on the duration of technological operations, such as, for example, shunting operations involving local wagons forwarding. To resolve these issues, a new approach has been proposed, under which the tasks of operative planning of a technical station’s operation and its subsystem of local operations are tackled simultaneously, based on a single model. To this end, a mathematical model of vector combinatoric optimization has been built, which uses the criteria of total operating costs and wagon-hours spent at a station when forwarding local wagon flows, in the form of separate objective functions. Within this model, a predictive model was constructed in the form of a fuzzy inference system. This model is designed to determine the duration of shunting half-runs when executing the spotting/picking operations for delivering local wagons to enterprises’ goods sheds. The model provides for the accuracy level that would suffice at planning, in contrast to classical methods. A procedure has been devised for optimizing the planning model, which employs the modern genetic algorithm of vector optimization NSGA-III. This procedure is implemented in the form of software that makes it possible to build a rational operative plan for the operation of a technical station, including a subsystem of local operations, in graphic form, thereby reducing the operating costs by 5 % and the duration of maintenance of a local wagon by 8 %. The resulting effect could reduce the turnover time of a freight car in general on the railroad network, speed up the delivery of goods, and reduce the cost of transportation

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“…There are also more complex methods for evaluating the time spent on performing shunting movements. In particular, in the work [12], the duration of shunting movements is established on the basis of observations. The method of traction calculations was used to calculate the duration of shunting movements in the work [13] when estimating the characteristics of a shunting locomotive with a hybrid power plant.…”

Section: Information Technologies Systems Analysis and Administrationmentioning

confidence: 99%

Improvement of the method for standardizing the duration of rail cars shunting

Козаченко¹,

Gera²,

Manafov³

et al. 2021

Nauk. visn. nat. hirn. univ.

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Purpose. To improve the method for calculating the time standard for shunting cars from track to track in order to take into account the local operating conditions of railway stations and railway sidings. Methodology. During the research, the methods of theory of railway operation were used. The problem of calculating the time standard for shunting operation was solved as the problem of searching the optimal division of train set into the car groups to achieve minimal time consumption for shunting operation. Findings. In the course of the study, the methods for calculating the time standards for initial and final operations, as well as movements performed when shunting cars from track to track were improved. It was proved that the minimum time spent on shunting cars from track to track was achieved when the train set was divided into the minimum possible number of parts and the cars were shunted in the longest possible groups and one remaining group. It was also established that with sufficient accuracy for engineering problems the duration of shunting train set from track to track can be represented by the piecewise linear function of the car number in it. Originality. The work originality consists in improving the method for calculating the time standard for shunting cars from track to track, that, unlike the existing one, takes into account the length limitations of the car groups being shunted from track to track, as well as the actual composition of operations performed in the process of shunting. Practical value. The use of the developed method allows setting time standards for shunting cars from track to track, taking into account the local operating conditions of railway stations and sidings of industrial enterprises. The method also makes it possible to simplify solving problems of searching the optimal order of performing more complex shunting operations, such as sorting cars into several tracks, collecting cars on one track, train formation, and others.

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Development of mathematical models for planning the duration of shunting operations

Cited by 9 publications

References 6 publications

The effect of methods of eliminating spikes in the time series of freight flows on their statistical characteristics

The effect of methods of eliminating spikes in the time series of freight flows on their statistical characteristics

Constructing a model for the automated operative planning of local operations at railroad technical stations

Improvement of the method for standardizing the duration of rail cars shunting

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