原子钟噪声的蒙特卡络模拟方法

Monte Carlo Method Applied to Simulation of Atomic Clock Noise

讨论了原子钟噪声的蒙特卡络模拟方法．具体过程是：先产生模拟所需的正态分布随机数，从实际钟的阿仑方差估算出噪声电平，然后用１组递点函数产生高质量的模拟钟时差的随机序列．在对１台商品铯钟进行具体模拟后，给出了真实数据与模拟值的阿仑方差之问的相符程度，最后对实际问题进行了分析．

In this paper, it is discussed in detail that a simulation method to various noises in atomic clock, and a solution of simulation time difference from random noise and linear frequency draft is given. The Monte Carlo method suits numberiai computation.The key of the method is to find a probability model and to generate a random time sequence.The simulating procedure is as follows: First to generate the normal distribution random numbers, then, to estimate the noise intensity from the allan variance of actual clock and to find the random Sequence of simulating time difference from a group of recurrence functions.At last, the simulation to commercial Ceisum beam atomic clock is carried out. The results show that the actual data are in agreement with the simulate data in the Allan variance.This method is more suitable to clock simulation in short term noise, since the long term change is more complicated. The environment condition of clock and the abrupt changes in the future should be considered. and the results of simulation would be more effective and feasible.