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| 1 | 基于电液悬挂系统的拖拉机主动减振控制显示文摘大功率拖拉机的减振问题对于确保拖拉机的行驶安全性及舒适性起着决定性作用。该文基于电液悬挂系统对拖拉机进行了主动减振控制系统的设计,设计了带位置校正环节的离散滑模控制方法。该方法仅利用电液悬挂系统已有的牵引力传感器及位置传感器采集振动信息,而不需增加其他振动传感器。之后该文对系统进行了仿真和试验验证,结果表明:与不加控制前相比,主动减振控制使拖拉机的振动强度及前轮胎动载荷均显著降低,在受到水泥路障冲击后的整个过程中,农具振动加速度的均方根值降低了51.2%,后轮轴心的垂直加速度均方根值降低了20.1%;拖拉机质心的垂直加速度均方根值降低了16.6%;前轮胎的平均动载荷降低了39%;农具的存在引起的10~15 Hz的振动被完全抑制,农具的存在所加强的约5 Hz的俯仰振动也几乎消失;位置校正环节使液压缸活塞的运动轨迹保持在期望位置范围内。实车试验中,振动加速度测量信号的均方根值降低了25.7%;驾驶室内测点的垂直加速度的均方根值降低了26.4%。证明了所设计的主动减振控制器的有效性和可行性。 | 承鉴 迟瑞娟 赖青青 杨悦静 毛恩荣 | 2017 | 农业工程学报2017，33，5： | 10 |
| 2 | Analysis of steering performance of differential coupling wheelset显示文摘In order to improve the curving performance of the conventional wheelset in sharp curves and resolve the steering ability problem of the independently rotating wheel in large radius curves and tangent lines, a differential coupling wheelset(DCW) was developed in this work. The DCW was composed of two independently rotating wheels(IRWs) coupled by a clutch-type limited slip differential.The differential contains a static pre-stress clutch, which could lock both sides of IRWs of the DCW to ensure a good steering performance in curves with large radius and tangent track. In contrast, the clutch could unlock the two IRWs of the DCW in a sharp curve to endue it with the characteristic of an IRW, so that the vehicles can go through the tight curve smoothly. To study the dynamic performance of the DCW, a multi-body dynamic model of single bogie with DCWs was established. The self-centering capability, hunting stability,and self-steering performance on a curved track were analyzed and then compared with those of the conventional wheelset and IRW. Finally, the effect of coupling parameters of the DCW on the dynamic performance was investigated. | Xingwen Wu Maoru Chi Jing Zeng Weihua Zhang Minhao Zhu | 2014 | Journal of Modern Transportation2014，22，2： | 4 |
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