面向商用车驾驶室俯仰振动的半主动悬置控制策略

商用车在经过减速带、凹坑等冲击工况时会产生较大的俯仰角,此时应采取与正常路面行驶时不同的控制策略对阻尼进行控制。首先,本文提出了一种混合控制策略,该控制策略将一种改进天棚控制和改进单传感器控制进行融合,可以根据路面条件和车辆状态等信息,来调整不同的算法的权重。通过实车数据确定各控制器参数。同时在实车中进行部分控制策略的验证,结果显示,该控制策略能够有效地提升车辆乘坐舒适性。在1/2半车模型上进行不同冲击路面仿真分析。结果表明,该控制策略在降低簧上质量加速度和俯仰角加速度方面有着较好的优化效果,也在全频域内有较好的控制效果。

Research on semi-active suspension control strategy for pitch vibration of commercial vehicle cab

Commercial vehicles will generate a large pitch angle when passing through impact conditions such as deceleration strips and pits. In this case, the damping should be controlled taking a different control strategy from that in the running process on a normal road surface. In this study, a hybrid control strategy was proposed firstly, which integrated improved Sky-Hook control with improved single-sensor control and could adjust the weights of different algorithms according to such information as pavement conditions and vehicle state. Then, the parameters of each controller were determined through real vehicle data. Meanwhile, some control strategies were verified in real vehicles. The results revealed that the proposed control strategy could effectively enhance the riding comfort of vehicles. Subsequently, different road impacts were simulated on a 1/2 half-vehicle model. The results reflected that the proposed strategy achieved favorable optimization effects on reducing the sprung mass acceleration and pitch angle acceleration and exhibited a good control effect within the whole frequency domain.