车辆道路模拟的计算机仿真系统设计研究.pdf

维普资讯 第 21卷 第 2期 农 业 工 程 学 报 Vo1．21 No．2 86 2005钜 2月 TransactionsoftheCSAE Feb． 2005 Research and design oftimedomain simulation system forvehicleroadstochastic irregularity ZhangYonglin，TengHonghua，HouChuanliang (M echanicalEngineeringDepartment，W uhanPolytechnicUniversity，W uh口，2430023，Chi口) Abstract：Itisnecessarytomodelandsimulatethetimehistoriesoftheroadforridedynamicsofavehiclesubjectedtothe stochasticroadexcitation．Thispaperfocusesonthemathematicalmodel，algorithm designandsimulationrealizationof roadintimedomain．Themethodsconvertingthefrequencydomain modelofroadirregularitvto theti wereanalyzedandthecorrelationsbetweenvehiclewheelsandbetween tracksweretaken intoaccoun numericalroad． Three main algorithms，harmony superposition，white noise filtration．and Inve Transform (IFFT )basedon road powerspectraldensity (PSD)，weredesigned and integratedas simulation constructed on theMATLAB software platform ．Forthe simulation to be asrealistic as importantaspects，includingthebi—lateraltrackrelationintimedomain，theimprovementofsimulation integrationofthemethodswereemphasized．Thesimulation exampledemonstratesthattheappliedme andefficient，andtheresultingtimedomainroadagreesfairlywellwith therealitv ． Keywords：Roadexcitation；stochasticirregularity；time～domainmodel；computersimulation CLC number：U461 Documentcode：A ArticleID：1002～6819(2005)02—0086—06 ZhangYonglinTengHong