Abstract
Vehicle driving safety is an important performance indicator for vehicles, and there is still much room for development in the active safety control of electric vehicles. A vehicle rollover is an important road traffic safety problem, as rollover accidents cause serious casualties and huge economic losses. It is very easy for vehicles in high-speed sharp turns or high-speed overtaking to roll over; in order to improve the vehicle in these conditions with the anti-rollover stability, this study proposed a real-time motor control strategy, mainly through the acquisition of vehicle attitude data and the use of multi-sensor fusion on the vehicle running state for real time. The lateral load transfer rate was used as the vehicle rollover evaluation index, and the test results indicate that when the real-time rollover index exceeds the set limit safety threshold, the motor speed is reduced through active control so that the vehicle avoids rollover accidents, or the risk of rollover is reduced. The STM32F103RET6 was used as the main chip for hardware design, control board fabrication, control program software design, and joint testing of software and hardware. The tests and data analysis prove that the motor control strategy is reliable in real time and can significantly improve the active safety of electric vehicles.
Highlights
The safety performance of vehicles on the road is an important performance indicator in the evaluation of vehicle performance [1]
This paper proposed an anti-rollover control strategy based on a pure electric vehicle, in the overall curve is the same, which has no influence on the analysis of the test results
According to the analysis of the test data and curve, when the vehicle is in a rollover hardware platform, combined vehicle rollover warning and active control of vehicle speed, dangerous driving condition, the control system quickly reacts and controls the motor developed an anti-rollover strategy based on motor speed control with load transfer rate (LTR) as the rollover speed down in time, reducingathe vehicle driving and making thethat vehicle evaluation index, andthus conducted small vehicle test. speed
Summary
The safety performance of vehicles on the road is an important performance indicator in the evaluation of vehicle performance [1]. According to the National Highway Traffic Safety. Administration (NHTSA), rollover accidents are the second-highest percentage of car accidents after collisions [2], with rollover accidents accounting for about 17.7% of all traffic fatalities. Anti-rollover performance of vehicles is one of the indicators used in the performance evaluation of new vehicles in the United States. In the study of automotive safety, rollover stability is the main mandated item requiring mandatory testing. Automotive safety is divided into two categories: active and passive safety [3]. Passive safety can only mitigate damage after an accident, not prevent it from happening. Scholars are focusing their research and development on active safety, which enables cars to take proactive action before an accident occurs
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