Temat: driving dynamics - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of the tire relaxation on the simulation results of the vehicle lateral dynamics in aspect of the vehicle driving safety
Autorzy:: Luty, W.
Powiązania:: https://bibliotekanauki.pl/articles/244449.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: tire relaxation
vehicle safety
lateral dynamics
vehicle dynamics simulation
vehicle driving safety
Opis:: Selected experimental research results of truck tire in steady-state side cornering and transient cornering conditions are presented in this paper. Experimental research results of the tire have been used in simulation research of medium duty truck in nonlinear driving conditions. The paper presents the structure of the vehicle dynamics model and a description of applied tire-road interaction model. Simulation research of the vehicle lateral dynamics has been performed in two variants: without and with the model of tire relaxation. During research, the tire relaxation length has been also changed. The steering wheel angle changes were forced as continuous sinusoidal excitation signal with a constant amplitude and with continuously increasing frequency. There have been analysed basic physical quantities characterizing the vehicle lateral dynamics connected with the vehicle active safety, especially including body yaw velocity and lateral acceleration in the centre of the truck body mass. An analysis of research results have been performed in the time and frequency domain. Time courses of analysed physical quantities and their frequency spectrum, obtained for tire-road interaction model without and with the tire relaxation (with different values of relaxation length) have been compared. Based on the simulation research results there have been considered the influence of tire relaxation on the vehicle performance. There have been shown that the tire relaxation can significantly change courses of observed physical quantities connected with vehicle lateral dynamics connected with vehicle driving safety.
Źródło:: Journal of KONES; 2015, 22, 1; 185-192
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Modelling of centre differential control
Autorzy:: Dębowski, A.
Żardecki, D.
Powiązania:: https://bibliotekanauki.pl/articles/244650.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: traffic modelling
4WD
MATLAB Simulink
dynamics
distribution of driving torque
Opis:: In this article we present a simplified model of centre differential control. At the beginning, the introduction highlights important role of center differential control and tests carried out using mathematical models. This work contains the full development of a model, consisting of: the equations which describe the vehicle, the structure of the model, important values and parameters used in the simulation. All these components allow you to expand an existing model, thus is not necessary to create it from the beginning. It presents detailed equations which were realized by a simulation model with a simplified block diagram illustrating the structure of the model and on the next the full structure. Then a concept of a simplified torque of split control system was described and which will be continue as the basis for the simulation model. The action of the control system is presented by the simulation model implemented in Matlab Simulink. Model refers to a linear motion in different road conditions and using the control of centre differential. In the following defines the parameters and data used in the model and the fifth chapter contains sample waveforms of model variables along with their brief description. The last two points are synthetic applications and supporting literature.
Źródło:: Journal of KONES; 2011, 18, 1; 135-142
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Optimization of driving technique of RWD racing car for faster cornering
Autorzy:: Maniowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/244959.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: racing car dynamics
lap time optimization
race driving technique
rear wheel drive
Opis:: The paper deals with increasing performance of a sports car through multicriteria optimization of driver actions (14 decision variables describing application of steering wheel, brake and accelerator pedals). Numerical example considers extreme negotiation of a RH corner (medium grip) with LADA 2105 VFTS (RWD, 106HP) prepared for road racing. Model (called “miMa”) of the vehicle with 26 state variables and 420 parameters was formulated and verified on the basis of road tests. The optimization goal function includes two criteria, i.e. section time and exit velocity. Different driving strategies giving an improvement are found. Changing the driving strategy, according to the obtained optimization results (no21) utilizing genetic algorithms, the section time (tAB) can be reduced by 2.5% and the exit velocity (vB) can increased by 3.5%, what in a competition reality gives a tremendous progress. Formulated “miMA” soft enables also combined optimization of driver actions, vehicle chassis parameters and motion trajectory.
Źródło:: Journal of KONES; 2015, 22, 1; 203-210
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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