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为了进一步研究重载工程机械运转特性,通过将柔性工作表面特征和前后桥转矩分配装置引入,建立四驱重载工程机械数学模型,得到一种基于发动机油门与前后桥转矩分配装置控制的四驱重载工程机械牵引力综合控制策略。研究结果表明,通过降低油门位置可以明显消除重载机械在柔性工作表面行驶过程中驱动轮过度滑转现象,使轮速维持在目标车速附近;系统中引入牵引力控制后可以很好抑制轮速在时间范围内变化波动性及过度滑转现象,将驱动轮速控制在目标车速范围内;系统中引入牵引力控制后明显消除了前后桥驱动轮转速差异,前后桥驱动力分配趋于合理。
In order to further study the operating characteristics of heavy duty construction machinery, the mathematical model of four-wheel drive heavy-duty construction machinery was established by introducing flexible working surface features and front and rear axle torque distribution devices. A control system based on engine throttle and front and rear axle torque distribution device Traction control strategy for four wheel drive heavy haul engineering machinery. The results show that the over-slip of the drive wheel can be obviously eliminated by reducing the throttle position and the wheel speed is maintained near the target speed. The introduction of traction control in the system can restrain the wheel speed The driving wheel speed is controlled within the target speed range; the introduction of traction control in the system obviously eliminates the difference in rotational speed of the front and rear axle drive wheels, and the distribution of driving forces at the front and rear axles tends to be reasonable.