AbstractThe following document sets out to determine the key limitations to existing methods of acquiring body slip angle data and how could accurate live body slip angle provide better information about a vehicle’s current behavior to aid vehicle safety systems.
Initially, body slip angle estimation techniques are evaluated as these methods are currently used in electronic stability control systems, as current vehicles do not have body slip angle sensors. It is clear to see that all the different estimations methods have clear limitations. With this in mind existing methods of measuring body slip angle were investigated, such as optical sensors, GPS and Doppler velocity sensors. It is clear that laser Doppler velocity sensors could be an accurate method of measuring body slip angle on consumer vehicles, therefore a body slip angle based electronic stability control system using laser doppler velocity sensors is proposed.
In order to further validate body slip angle based electronic stability control systems, several multi body simulations are carried out. The multi body simulations show that an electronic stability control system based on body slip angle is feasible. The simulations also show that in low coefficient of friction conditions the body slip angle is a better indicator of vehicle behavior than yaw rate.
In conclusion, it is clear to see that there is a need in the automotive industry for direct real time slip angle sensors, but further research is required to determine the robustness and viability of body slip angle targeted ESC systems.
|Date of Award||2016|