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U ovom radu je obrađena tema ravninske dinamike kotača na kolniku s neravninama. U uvodnom dijelu razmatrana je problematika pasivne dinamike kotača. Istraženi su različiti pristupi modeliranju te je analitički pristup detaljnije razmotren. Uspoređeno je nekoliko različitih analitičkih modela i za svakog od njih navedeni su prednosti i nedostaci. Na temelju postojećeg prostornog modela kontakta kotača i podloge definiran je i objašnjen ravninski model kontakta kotača i podloge. Definiran je mehanički model četvrtine vozila u ravnini u koji je ugrađen ravninski model kontakta kotača i podloge. Izvedene su potrebne jednadžbe gibanja četvrtine vozila na temelju kojih je izrađen simulacijski model u programskom paketu MATLAB – SIMULINK. Prikazani su i prokomentirani rezultati simulacije za različite visine prepreka i brzine vozila. Na kraju rada dan je kratak zaključak na obrađenu temu i izrađeni model. In this thesis a 2D model of wheel dynamics on roadway with irregularities is discussed. In introduction is discussed about a passive wheel dynamics issue. Different modeling approaches are investigated while analytical is further discussed. Several analytical models are compared and their advantages and disadvantages are mentioned. Based on current 3D wheel-road contact model, 2D model is defined and explained. 2D quarter vehicle model is defined in which 2D wheel-road contact model is implemented. Equations of motion are derived on the basis of which simulation model in MATLAB – SIMULINK software is created. Simulation results for different obstacle heights and vehicle speeds are shown and discussed. In the end of this thesis a short conclusion on discussed topic and created model is given. |
