基于Simscape的理想地棚阻尼被动实现方法研究

利用质量元件与惯容器之间的振动状态转换现象,提出理想地棚阻尼的被动实现方法,设计了被动地棚阻尼悬架,建立惯容器Simscape模型,采用物理拓扑网络方式构建整车Simscape模型,通过比较传统被动悬架、理想与被动地棚阻尼悬架系统性能,检验理想地棚阻尼被动实现方法的正确性与有效性。结果表明,被动地棚阻尼悬架系统能够抑制车轮共振,使轮胎动载荷均方根值减小30%以上,大幅提高了车辆的行驶安全性,与理想地棚阻尼悬架性能基本一致。

On 3D Geo-visualization of a Mine Surface Plant and Mine Roadway

Constructing the 3D virtual scene of a coal mine is the objective requirement for modernizing and processing information on coal mining production. It is also the key technology to establish a ＂digital mine＂. By exploring current worldwide research, software and hardware tools and application demands, combined with the case study site （the Dazhuang mine of Pingdingshan coal group）, an approach for 3D geo-visualization of a mine surface plant and mine roadway is deeply discussed. In this study, the rapid modeling method for a large range virtual scene based on Arc/Info and SiteBuilder3D is studied, and automatic generation of a 3D scene from a 2D scene is realized. Such an automatic method which can convert mine roadway systems from 2D to 3D is realized for the Dazhuang mine. Some relevant application questions are studied, including attribute query, coordinate query, distance measure, collision detection and the dynamic interaction between 2D and 3D virtual scenes in the virtual scene of a mine surface plant and mine roadway. A prototype system is designed and developed.

被动地棚阻尼悬架系统设计及特性分析

为了被动实现理想地棚阻尼,基于惯容器提出一种被动地棚阻尼悬架设计方法,建立悬架系统的半车模型,对比分析了传统被动悬架、理想与被动地棚阻尼悬架系统频响特性。结果表明,与传统被动悬架相比,被动地棚阻尼悬架能够减小质心垂直加速度、车身俯仰加速度、悬架动行程和轮胎动载荷增益高频共振峰值60%以上,有效抑制了车轮共振,大幅提高了轮胎的接地性能,改善了车辆的行驶安全性,实现了理想地棚阻尼悬架的主要功能。