Abstract
With the features of high centroid, high load capacity and high aspect ratio, heavy vehicles are prone to rollover when running at high speeds in the corners, so the study of heavy vehicle rollover warning method presents important realistic meanings. In this paper, firstly, the composition of early warning systems is analyzed, and then the principles of rollover warning method based on suspension distortion perception are proposed; Secondly, the wheels sprung suspension force formula is established when the vehicle is cornering, taking lateral load transfer rate as the rollover warning threshold and the size of wheel suspension pressure warning threshold when cornering is determined; Finally, a test vehicle is taken for example to validate the rollover warning method. The simulation results show that the early warning method is capable of warning the vehicles when in the curve and has a rollover risk to avoid the rollover, thus improving the traffic efficiency in curve.
Highlights
Highway curve is the black-spot of accident; the probability of the accident to occur and the high-severity of the accident have made it a concerning issue in research institutes and universities domestically and abroad [1, 2]
National Highway Traffic Safety Administration statistics show that the degree of hazard of vehicles rollover accident is just secondary to the car crash accident
Rollover warning methods mainly consist of rollover warning time TTR [4, 5], rollover risk prediction [6] and use of lateral acceleration and the lateral load transfer rate as the early warning indicators to determine the degree of risk of vehicle rollover warning [7, 8] and so on
Summary
Highway curve is the black-spot of accident; the probability of the accident to occur and the high-severity of the accident have made it a concerning issue in research institutes and universities domestically and abroad [1, 2]. National Highway Traffic Safety Administration statistics show that the degree of hazard of vehicles rollover accident is just secondary to the car crash accident. According to the University of Michigan Transportation Research Center statistics, during the period 2002-2006, heavy vehicles rollover accidents occurred 5200 times annually on an average in the US (average deaths amounting to 5,300). The deaths due to heavy vehicles rollover accidents are increasing year by year [3], being times more in China than European and American countries. Heavy vehicle rollover accidents are the major traffic accidents that cause the loss of life and property and have become important issues affecting transportation safety. Scholars in China and abroad have conducted much relevant research on rollover warning of heavy vehicles traveling on a curve. When index of one of the wheels reaches the threshold calculated by warning system, the system can timely warn and alert the driver to control the vehicle to prevent rollover
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