城市轨道交通是以电能为动力,采取轮轨方式运转的公共交通系统,具有运量大、能耗低、污染少、快速、正点、乘座舒适方便等特点,通常被称为“绿色交通”。采用车载电机牵引,钢轮钢轨支承与导向的直线电机运载系统是一种新型的城市轨道交通方式,因其具有爬坡能力强,转弯半径小,轮 Urban rail transit is a public transportation system that takes electric energy as its driving force and runs on wheel and rail. It has the characteristics of large capacity, low energy consumption, less pollution, quickness, punctuality and comfortable ride. It is often called “green traffic” . The use of vehicle motor traction, steel rail support and guidance of linear motor delivery system is a new type of urban rail transit, because of its climbing ability, turning radius is small, the wheel