根据拖拉机动力学测试与控制系统开发的需要,确定了在拖拉机轮胎中心位置安装通用传感器的支架设计技术要求,并进行了结构优化设计.设计的支架总质量1.815 kg,轴向尺寸可调节,保证了支架主平面安装时与轮胎旋转平面平行且其旋转中心与轮胎中心对齐.有限元分析表明,在最坏H级路面、车速90 km/h、垂直冲击和旋转载荷输入下支架最大变形量小于0.2mm,不会增加传感器因安装造成的测量误差.设计了道路试验系统,通过试验验证了支架工作的可靠性.为中小规模农田机械化作业中对拖拉机进行导航辅助驾驶,和拖拉机运动特性测试中在轮胎中心安装传感器提供了有效手段.%For effective completion of tractor dynamics test and developing its control units, the technology requirements for general sensor installation bracket on tire center position was firstly determined, then the detailed structure was optimized and processed. The designed mass of bracket was 1. 815 kg and its axial length could be adjusted. The designed structure ensured that the principal plane of bracket was parallel to the tire rotary plane and its rotation center was aligned with the tire rotation center. The finite-element simulation analysis showed that the max deformation of the bracket was less than 0. 2 mm when loaded with vertical and rotation inertial forces at speed of 90 km/h on the worst H level road, so it could not add systematical error on the measurement data. A roadway test system was developed and the reliability of the bracket was verified by the systematical roadway tests. This research provided a general and effective means to study the measurement problem on the rotation tire center, such as tractor assistant driving navigation system for mechanized working in small or medium scale farmland, tractor tire dynamics and so on.
展开▼
