惯性导航系统仿真时需要用到的各种算法程序，分成多个模块，只要调用函数即可-Inertial navigation systems need to use a variety of algorithms simulation program into multiple modules, as long as you can call the function

GNSS定位代码，包括许多改正的代码模块，电离层改正，对流程改正等等十多个模块功能。-GNSS positioning code, including many of the correct code module, ionospheric correction, the process of correction and so on more than and 10 modules function

基于多体动力学的simpack下的铁道专业模块，建立起来了刚性转向架模型。