Effects of Tire and Anti-Roll Bar Stiffness on Vehicle Handling
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نویسندگان
11- پسا دکتری، دانشکده مهندسی مکانیک، دانشگاه صنعتی شریف، تهران، ایران 2- معاونت توسعه محصول، خودروسازی زامیاد، تهران، ایران
2معاونت توسعه محصول، خودروسازی زامیاد، تهران، ایران
چکیده
Handling is one of the important criteria in evaluating vehicle dynamics. Improving the handling first requires defining sub-targets and their acceptable ranges, and then finding the un-der-control parameters with the most effects on sub-targets. These are the focus of this research that is performed for an N2 pickup truck. After simulating the under-study (default) vehicle and its benchmark (target) vehicle, standard handling tests according to ISO are performed to compare the results of the two vehicles. Constant radius cornering and step steer tests are identified as appropriate representatives of the handling. Roll angle, understeer coefficient, lateral deviation, and yaw rate are defined as sub-targets. Tires and anti-roll bar stiff-nesses are selected to examine their effects on sub-targets. Sensitivity analysis based on a design of experiment method and analysis of variance is a tool to examine the effectiveness of parameters on the outputs. The complicated nonlinear vehicle model is substituted with some quadratic regression models to be used for optimization by the response surface method. The obtained optimum solution is verified using the nonlinear model and it is illustrated that changing the selected parameters can make the handling like the benchmark vehicle.
کلیدواژه ها
موضوعات
 
Title
Effects of Tire and Anti-Roll Bar Stiffness on Vehicle Handling
Authors
Somaye Mohammadi, Ramin Farnia, Shahzad Mohammadzadeh
Abstract
Handling is one of the important criteria in evaluating vehicle dynamics. Improving the handling first requires defining sub-targets and their acceptable ranges, and then finding the un-der-control parameters with the most effects on sub-targets. These are the focus of this research that is performed for an N2 pickup truck. After simulating the under-study (default) vehicle and its benchmark (target) vehicle, standard handling tests according to ISO are performed to compare the results of the two vehicles. Constant radius cornering and step steer tests are identified as appropriate representatives of the handling. Roll angle, understeer coefficient, lateral deviation, and yaw rate are defined as sub-targets. Tires and anti-roll bar stiff-nesses are selected to examine their effects on sub-targets. Sensitivity analysis based on a design of experiment method and analysis of variance is a tool to examine the effectiveness of parameters on the outputs. The complicated nonlinear vehicle model is substituted with some quadratic regression models to be used for optimization by the response surface method. The obtained optimum solution is verified using the nonlinear model and it is illustrated that changing the selected parameters can make the handling like the benchmark vehicle.
Keywords
Vehicle Handling, Tire, Sensitivity analysis, Optimization