Emulation refers to the simulation of physical system by software, so that software used in physical system can also work in virtual software environment. Based on analyzing the digital control computer ( DCC) system in a nuclear power plant(NPP) , we design a software to emulate DCC system, and develop the supporting maintenance tools as well. The DCC control program can work well in virtual system and accomplish the same function. This system has been used in full scope simulator( FSS)to substitute primary physical system. It can meet the training re-quirements, improve the simulation accuracy of FSS, and make the maintenance easier and more effective.%一维交通流仿真是人们所关心的热点课题,而元胞自动机方法在近年来已成为人们研究一维交通流建模问题的一个基本方法.人们通过对元胞自动机的规则做出多种变化,获得了不同的模型.尽管如此,元胞自动机方法仍有其不足之处.一是它是一种离散的模型,所给的车辆速度不连续,二是当后车与前车距离较近时,后车仍可作较大幅度的加速或减速,这与实际情况不一致.针对上述问题,在一种原有的基于固支梁挠度曲线的连续的虚坡模型的基础上,令后车接近前车时,允许后车速度上限发生波动,但其幅度向零逼近.对仿真实例进行了试算,得到了满意的结果.
展开▼
