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Development of dynamic mechanism for the prevention of tractor rollover by employing active steering

机译:采用主动转向防止拖拉机翻转的动态机制的发展

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The prevention of rollover is one of the important missions in tractor safety as the rollovers are responsible for more than half of all tractor related deaths. In our research, a mathematical models for conventional farm tractors with front axle pivot was established to investigate the dynamic mechanism for the prevention of rollover by employing active steering. Besides, an energy-based tractor stability indicator was proposed to evaluate the status of tractor. The analysis of dynamic mechanism andsimulations revealed that the active steering provided an extra torque which opposite to the rollover direction and changed the roll angle of the tractor to prevent the happening of rollover. In this condition, the torque opposite to the rollover direction reduces the kinetic energy of the rollover, and at the same time, the change of the tractor roll angle increased gravitational potential to prevent rollover. Besides, the results also showed the fact that active steering can only prevent tractor rollover accidents within a certain range which means further research should be conducted to propose new methods for solving the problem that rollover cannot be prevented by active steering when the tire's steering angle and the side kinetic energy exceedstheir respective limits. The approach developed in this study provides an available way to solve the problem of tractor rollover and the dynamic mechanism developed offers an analytical method in tractor safety.
机译:由于滚动转化物负责所有拖拉机相关死亡的一半以上,预防翻转是拖拉机安全的重要任务之一。在我们的研究中,建立了具有前轴枢轴的传统农用拖拉机的数学模型,以研究采用主动转向防止翻转的动态机制。此外,提出了一种基于能量的拖拉机稳定性指示器来评估拖拉机的状态。动态机构和刺激的分析表明,主动转向提供了与翻转方向相对的额外扭矩,并改变了拖拉机的滚动角度,以防止翻转的发生。在这种情况下,与翻转方向相反的扭矩减小了翻转器的动能,同时拖拉机滚角的变化增加了重力电位以防止翻转。此外,结果还表明,主动转向只能防止拖拉机翻转事故在一定范围内,这意味着应该进行进一步的研究,以提出解决问题的问题,当轮胎的转向角和时,通过主动转向不能防止滚动的问题。侧动能超过了各自的限制。本研究开发的方法提供了一种可用的方法来解决拖拉机翻转问题,而动态机制开发的是拖拉机安全的分析方法。

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