基于IEEE1588同步协议的本地时钟频率控制算法

摘要

为消除本地时钟的频率漂移对IEEE1588 时钟同步协议的影响,提高网络同步精度,提出运用单神经元自适应PID控制器对本地时钟频率进行控制的方法.将神经网络自学习、自组织和自适应的特点与PID控制相结合,实现参数的实时调整,提高控制精度.在控制器结构中添加移动平均滤波模块,抑制本地时钟的不确定性频率抖动.仿真结果表明,该方法可以显著提高PTP的同步精度,具有较强鲁棒性.%A single neuron adaptive PID controller was presented to eliminate frequency drift effects of the local clock on IEEE1588 time synchronization protocol and to improve the accuracy of the network timing.Neural network self-learning,self-organization and self-adaption were combined with PID control,so as to realize the real-time adjustment of parameter,and the control precision was improved.In addition,the filter module was used to eliminate the local clock frequency jitter.Results of simula-tion show that the proposed method can significantly improve the PTP synchronization accuracy,and it has strong robustness.