Dissertation
Dissertation > Transportation > Road transport > Automotive Engineering > Vehicle test > Parameters of the instruments and technology

Reasons and Solutions of Vehicle Driving Wandering Based on Driving Wandering Test System

Author LiaoCong
Tutor HeYaoHua
School Wuhan University of Technology
Course Vehicle Engineering
Keywords Vehicle driving wandering Error analysis Statistic analysis
CLC U467.4
Type Master's thesis
Year 2012
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Vehicle driving wandering is a phenomenon that the vehicle always goes to the one side when driver leaves the steering wheel along, only touching it very lightly. This is a dangerous phenomenon. The driving wandering test system based on Machine Vision could test and distinguish the cars with problem of driving wandering quickly and effectively. This thesis analyzes the general rules and features of driving wandering based on the dates collected from two vehicle factory who applied the systems, and researches the reasons and corresponding solutions of driving wandering.The driving wandering test system is developed on the flat of LabVIEW, which intergraded with technology of optical fiber transmission, Ethernet network, and Wireless Local Area Networks communication. Firstly, the thesis research on the distribution and feature of test error from three aspects of calibration error, template matching error and calculation error. It points out that the effect of position precision of control point relative to foundation frame, foundation frame relative to the ground and repeated assembly on calibration precision, and bring out some improvement approach. According to the analysis of the data from repeatedly matching with the same image of every one control point, it finds out the matching error characteristic of inner matching arithmetic. It also analyzes the three calculation methods of driving wandering quality and point out that the seasonal method is numeric subtracting.The thesis statistically analyzes the data of drive wandering of three kinds of cars. According to the distribution features and user’s requirements, it puts forwards that the qualified standard could be narrowed to left for40cm to right30cm. In addition, the cumulative probability density analysis disqualifications indicates interval of mismatching through the platform area function curve.

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