浅谈车轮定位

为了适应汽车高速化的需要，满足汽车行驶平稳、乘坐舒适的要求，各种新技术和新结构被不断地应用在现代汽车上。从主销后倾角、主销内倾角、前轮外倾角、前束等方面对现代汽车与传统汽车的车轮定位的变化进行了比较。     

主动稳定杆与主动前轮转向耦合作用研究

对于同时装备主动稳定杆与主动前轮转向的车辆,为了获得最佳控制性能,建立仿真模型研究了双系统的耦合问题.建立非线性车辆动力学模型,并设计了主动转向比例积分微分控制器;基于稳定杆作动器,设计了主动侧倾滑模控制器以及反侧倾力矩前后轴分配模糊控制器;最后设置阶跃转向与双移线机动工况.仿真结果表明,主动转向可以一定程度改善侧倾性能;另一方面,反侧倾力矩分配与主动转向配合可以进一步提高车辆的横摆稳定性能,同时还可以保证侧倾稳定性能.     

Kinematic characterization and optimization of vehicle front-suspension design based on ADAMS

To improve the suspension performance and steering stability of light vehicles, we built a kinematic simulation model of a whole independent double-wishbone suspension system by using ADAMS software, created random excitations of the test platforms of respectively the left and the right wheels according to actual running conditions of a vehicle, and explored the changing patterns of the kinematic characteristic parameters in the process of suspension motion. The irrationality of the suspension guiding mechanism design was pointed out through simulation and analysis, and the existent problems of the guiding mechanism were optimized and calculated. The results show that all the front-wheel alignment parameters, including the camber, the toe, the caster and the inclination, only slightly change within corresponding allowable ranges in design before and after optimization. The optimization reduces the variation of the wheel-center distance from 47.01 mm to a change of 8.28 mm within the allowable range of ?10 mm to 10 mm, promising an improvement of the vehicle steering stability. The optimization also confines the front-wheel sideways slippage to a much smaller change of 2.23 mm; this helps to greatly reduce the wear of tires and assure the straight running stability of the vehicle.     

电动汽车驱动效率仿真研究

由于环境污染和能源危机，世界各国加快了电动汽车的研制步伐。驱动效率是电动汽车研究的一个重要性能参数，对电动汽车的行驶性能、能量消耗和续驶里程有一定的影响。通过建立电动汽车的整率动力学模型和仿真研究，分别对单电机和双电机结构下前轮驱动与后轮驱动的整车疆动效率进行分析，得出了电动汽车的高效率驱动形式。