对数据融合算法中经典的交互式多模型法进行仿真，便于入门级进行学习(Simulation of classical method which is interactive multiple model method and it is easy for entry-level learning)

多阶梯轴模型建立及表面切向载荷施加，模拟轴承的受力(The multi step shaft model is established and the surface tangential load is applied to simulate the bearing force)