Dynamic Change of Virtual Time When Modeling Vehicle Operating Cycles in the Program ‘Stamm’

Dynamic Change of Virtual Time When Modeling Vehicle Operating Cycles in the Program ‘Stamm’

A.V. Manyashin

Tyumen Industrial University, Russia

Available online: 
| Citation



The article explores the problem of modelling performance properties of cars in real driving conditions. At the same time, real or synthetic driving cycles are used to reproduce the road situation in the simulation model. The composition, the ratio of individual components and the nature of speed changes in such cycles significantly depends on both the traffic conditions on the route and the design features of the vehicles. The purpose of this work is to optimize simulation models of car operation by reducing the time of the experiment while maintaining the required accuracy of the model. This result is achieved using a dynamically changing model time. The paper considers the features of driving cycles of cars for various purposes. The program of simulation modelling Stamm 4.1 is presented, which implements the method of dynamic change of model time when simulating driving cycles of cars, which allows significantly reducing the duration of the experiment.


operating cycle of a vehicle, simulation modelling, urban traffic conditions


[1] Karnaukhov, N.N., Reznik, L.G. & Manyashin, A.W., The influence of automobiles motion unevenness on harmful substances emission. Proceedings of the Eighth International Conference on Urban Transport and the Environment in the 21st Century, pp. 553–560, 2002.

[2] Manyashin, A.V. & Manyashin, S.A., Method for synthesizing the driving cycle of a car. International Scientific Journal, 1, pp. 87–91, 2012.

[3] Marks, N. & Robinson, M., Variable timestep algorithm for molecular dynamics simulation of non-equilibrium processes. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 352, pp. 3–8, 2015.

[4] Nzale, W. & Mahseredjian J., Two Variable Time-Step Algorithms for Simulation of Transients, IEEE Milan PowerTech, pp. 3076–3082, 2019.

[5] Manyashin, A., Simulation of transport operation in urban conditions with variable virtual time increments in the program Stamm 4.1, WIT Transactions on the Built Environment, vol. 200, WIT Press: Southampton and Boston, pp. 185–192, 2020.

[6] The program for initial data processing, creating simulation models and data visualization. [Online]. https://www.stamm.uno (accessed 19 February 2021).

[7] The Worldwide Harmonised Light Vehicle Test Procedure (WLTP). [Online]. https://www.vehicle-certification-agency.gov.uk/fcb/wltp.asp (accessed 22 February 2021).

[8] Variable Time step in Transient simulation. Ansys Learning Forum. [Online]. https://forum.ansys.com/discussion/7118/variable-time-step-in-transient-simulation (accessed 4 January 2021).