Develoment of multi-body program for tracked motion with electromagnetic forces

为了模拟运动物体在电磁力的支撑、引导和推进作用下的动态特性，推导了运动物体的解析解。物体的运动由运动坐标系和参考系定义，分两个阶段计算：1.作用在每个物体上的力的计算。在前一周期的第二阶段中得到每个物体的给定位置后，用数值方法求解电磁力和电流分布，并由此得到物体之间的作用力。电磁场的计算依赖于铁磁材料的存在。文中对两个案例进行了研究。一种适用于所有空气芯，另一种适用于电磁铁和反应板。还考虑了物体间机械耦合产生的力。计算了在第二阶段给定力作用下物体的动态运动。同时，根据运动重新排列帧的位置。这些方案被应用于EDS和EMS磁悬浮车辆的动态特性分析。这些分析程序的结构复杂，难以对模型中的参数进行细微的修改。研究了并行推理机(PIM)在解决这一问题中的应用，证明了其可行性。

Analytical schemes are derived in order to simulate dynamic performances of moving bodies, which are supported, guided and propelled with electromagnetic forces. The motion of bodies are defined with moving frames and a reference frame, and calculated in two stges as :1. calculation of forces acting on each bobyUnder the given position of each body obtained in stage 2 of the former cycle, electromagnetic forces and current distribution are solved numerically and forces acting between bodies are derived with them. The calculation of the electromagnetic field depends upon the existence of ferromagnetic materials. Two cases are studied. One case for all air cores, another for electromagnets and reaction plates. The forces generated by mechanical coupling between bodies are also incorporated.2. Dynamic motion of bodies under forces given in stage 2 is calculated. Simultaneously the position of frames are re-arranged on the basis of motion. The velocity vectors of motion are provided to be used in stage 1.These schemes are applied to analyze dynamic behavior of EDS and EMS maglev vehicles. The results give important information on their design related to the guideway construction.A problem remained is the structural complexity of these analyzing programs, which make the minor modification of parameters in the models difficult. Application of the parallel inference machine (PIM) to solve this problem is studied and its feasibility is proven.