TAILIEUCHUNG - tyre vehicle dynamics 2011

Tham khảo sách 'tyre vehicle dynamics 2011', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Tyre and Vehicle Dynamics Hans B. Pacejka Professor Emeritus Delft University of Technology Consultant TNO Automotive Delft The Netherlands Chapter 1 TYRE CHARACTERISTICS AND VEHICLE HANDLING AND STABILITY . Introduction This chapter is meant to serve as an introduction to vehicle dynamics with emphasis on the influence of tyre properties. Steady-state cornering behaviour of simple automobile models and the transient motion after small and large steering inputs and other disturbances will be discussed. The effects of various shape factors of tyre characteristics cf. Fig. on vehicle handling properties will be analysed. The slope of the side force Fy vs slip angle a near the origin the cornering or side slip stiffness is the determining parameter for the basic linear handling and stability behaviour of automobiles. The possible offset of the tyre characteristics with respect to their origins may be responsible for the occurrence of the so-called tyre-pull phenomenon. The further non-linear shape of the side or cornering force characteristic governs the handling and stability properties of the vehicle at higher lateral accelerations. The load dependency of the curves notably the non-linear relationship of cornering stiffness with tyre normal load has a considerable effect on the handling characteristic of the car. For the quasi Fig. Characteristic shape factors indicated by points and shaded areas of tyre or axle chacteristics that may influence vehicle handling and stability properties. Slip angle and force and moment positive directions cf. App. 1. 2 TYRE CHARACTERISTICS AND VEHICLE HANDLING AND STABILITY steady-state handling analysis simple single track two-wheel vehicle models will be used. Front and rear axle effective side force characteristics are introduced to represent effects that result from suspension and steering system design factors such as steering compliance roll steer and lateral load transfer. Also the effect of possibly applied .

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