Abstract
The rollover accidents in the tractor semi-trailer are often fatal and many factors could cause the tractor semi-trailer rollover. In this paper, a rollover prevention control method was proposed based on real-time calculation of rollover index. The vehicle Center of Gravity (CG) height from the ground is an important parameter in the rollover index and it is estimated through lateral acceleration sensor and suspension deflection sensors. Comparing the rollover index with the preset threshold, the differential braking will be applied to corresponding wheels once the trigger conditions are met. A roll stability control simulation was performed on the dynamic model based on virtual prototyping. The results show that the rollover prevention control proposed in this paper can stabilize the tractor semi-trailer and prevent from rollover on high speed curve driving.
Highlights
Lateral instability phenomena will likely occur in tractor semi-trailers on high speed obstacle avoidance under emergency or during high speed curve driving
Once the calculation value exceeds the preset threshold, the differential braking will be applied to corresponding wheels
A rollover prevention control method was proposed based on real-time calculation of rollover index
Summary
Lateral instability phenomena will likely occur in tractor semi-trailers on high speed obstacle avoidance under emergency or during high speed curve driving. Tractor semi-trailer rollover accidents are not frequent occurrences, fatalities associated with rollovers are high. It is not unusual for the economic losses of the payload and other associated insurance costs to be significant to the transporter [4]. The vehicle CG height can be estimated in real-time based on an accurate observation of the vehicle roll angle, or utilizing an extended Kalman filter [6,7]. Based on the calculation results of rollover index, a rollover prevention control will be performed, the maximum braking pressure is applied on the outer wheels. The simulation results show that the rollover detection and prevention methods can improve the tractor semi-trailer lateral stability during high speed bend driving situations
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