Wyniki wyszukiwania - BazTech

1

Dynamic stability of a model of a tractor-lorry-trailer combination

Sakno O., Moysya D. L., Kolesnikova T.

Zeszyty Naukowe. Transport / Politechnika Śląska

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2018

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z. 99

163--175

EN

In this paper, we consider the mobility and stability of a model of a tractor-lorry-trailer combination, consisting of a two-axle tractor and a single-axle semi-trailer, and its possible stationary states with fixed steering. A feature of this research is the study of a non-linear mathematical model of a two-link tractor-lorry-trailer combination. The set of steady-state conditions for the movement of the tractor-lorry-trailer combination model is determined on the basis of the developed mathematical model; it provides the necessary mobility for the passage of the circular overall traffic lane. The range of stable steady-state conditions of the road train is limited and the character of the loss of stability in the direct motion of the road train (divergent, flutter) is checked. The phase portraits of the system are constructed at different speeds, which allow us to estimate the range of attraction for direct motion. Stability issues are also considered, namely, the influence of the control parameters (θ, v) on stability or instability.

2

Thermodynamic analysis of the conrod-free engine

Kolesnikova T., Sakno O., Velmagina N., Lysyl O.

Transport Problems

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2018

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T. 13, z. 3

29--39

EN

The paper considers the problems related with the thermodynamic analysis of the conrod-free engine. A mathematical model of the intake system of the conrod-free engine is proposed, which takes into account the kinematics of the slider-crank mechanism. The computational model of the intake system of the engine with the slidercrank mechanism is presented. The model allowed determining dependencies of the mixture temperature in the intake pipeline on the rotation frequency of crankshaft and on the angle of opening of the throttle gate. The total pressure losses in the engine intake system are determined taking into account the kinematics of the slider-crank mechanism. The mathematical model of the intake system of engine allows evaluating the measures aimed at optimizing the engine design and increasing its fuel efficiency.

3

Trucks tires resource controlling by control of process of their wearing-out

Kravchenko A., Sakno O., Lukichov A.

Transport Problems

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2014

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T. 9, z. 1

83--93

EN

Intensity and form of wear of tire′s tread depends on the technical state of assemblies of car suspension. The database according to the information of control of the height of the protector picture is forming. On its basis on the developed system of maintenance of tires setting of norms, prognostication and optimization of resource of tires is made, necessary repair influences of tires and assemblies of suspension are appointed.

UK

Интенсивность и форма износа протектора шин зависит от технического состояния функциональных узлов подвески автомобиля. По данным контроля высоты рисунка протектора формируется база данных. На ее основе по разработанной системе обслуживания шин производится нормирование, прогнозирование и оптимизация ресурса шин, назначаются необходимые ремонтные воздействия для шин и узлов подвески.

4

Research of dynamics of tire wear of trucks and prognostication of their service life

Kravchenko A., Sakno O., Lukichov A.

Transport Problems

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2012

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T. 7, z. 4

85-94

EN

The dependences of tire wear on the tire life are determined on the basis of the system measurements of residual tread depth in the actual operating conditions; the factors which influence the critical tire wear are analyzed. The prediction technique of the operation life and the tire changing is devised.