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Research on Turning Characteristics of Multi-axle Steering Vehicles Based on Matlab/Simulink

Author: ZhangWeiYuan
Tutor: SongChuanXue
School: Jilin University
Course: Vehicle Engineering
Keywords: Multiaxial car Tire wear Matlab / Simulink Steering characteristics
CLC: U463.4
Type: Master's thesis
Year: 2011
Downloads: 307
Quote: 1
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Abstract

Heavy-duty vehicles play an irreplaceable role in the national economy and national defense construction. However, due to the more complex and specific operating environment and driving traffic, combined with a long body, quality, resulting in its low-speed steering turning radius, relatively poor mobility and flexibility, tire wear is more serious. This directly affects vehicle handling and stability, economy and tire life, so the multi-axis steering technology applications in the heavy-duty vehicles, allows multi-axis heavy-duty vehicles steering performance to get the raise. In recent years, at home and abroad are actively carry out research on multi-axis steering technology. Since the multi-axis turning technical part relates to the field of the military industrial technology, the technology is in the leading countries strictly control the steering and technical exchanges with China on car multiaxial. So far, the literature of the domestic system of multi-axis steering is still small and the theory of multi-axis steering technology is still in its immature stage and are concentrated in the optimized design of the steering system. Multiaxial car driving and steering the process more serious tire wear and car easier to steering instability and the the maneuvering flexibility to be improved to become the main problem of domestic multi-axis automobile steering technology development. In this paper, a five-axis heavy-duty vehicles as the research object, a detailed study of the multiaxial car steering the process of steering wheel rotation relationship, turned to the determination of the instantaneous center position and steering resistance torque calculation; tire wear problems, in-depth research and analysis The tire wear mechanism, combined with a multi-axis automobile steering process analysis. Vehicle systems, including the movement of the vehicle sprung mass movement, wheel movement, as well as tire mechanics kinetic equations provide a theoretical basis for the establishment of the simulation model. Simulink is a visual simulation tool based on Matlab platform, with its powerful simulation capabilities, to build vehicle model based on system dynamics equation has been deduced vehicle. The model consists of vehicle motion model, the sprung mass movement model, model of the motion of the wheel, tire mechanics model and some auxiliary computing model. The different steering simulation by setting multiaxial car steering characteristics simulation. By comparing the simulation data, the analysis of the multi-axis automobile steering characteristics while also verify the accuracy and applicability of the model. Through this research work can be seen, the derivation of kinetic equations of the multi-axis automobile model mentioned in the text can be a good representation of the mechanical characteristics of the car, and to provide help for the further study of the multi-axis automobile.

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