Estimation of Side Wind Disturbances in Automotive Vehicles

University essay from Lunds universitet/Institutionen för reglerteknik

Author: Anders Widd; [2006]

Keywords: Technology and Engineering;

Abstract: This work is focused on a system which aims at estimating and attenuating side wind acting on a vehicle. The side wind disturbance is estimated using a disturbance observer. This thesis investigates the robustness towards sensor offset and parameter error. A few possibilities for reducing the effects of sensor offset are presented. A large part of the thesis is dedicated to on line identification of tyre parameters. Recursive Least Squares and Multiple Model Estimation are implemented in Matlab/Simulink and evaluated using measurement data. Both methods are found capable of distinguishing between ordinary tyres and winter tyres. A feedforward controller which uses the side wind estimate is also designed and evaluated in simulation.

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