【摘要】 时间同步是在分布式控制系统架构下实现加速器实时控制的核心技术之一,针对普通晶振的频率偏差造成IEEE1588同步精度低的问题,本文提出了一种频率动态补偿的算法,使加速器实时控制系统能够实现更高的时间同步精度。本文简要介绍了IEEE1588时间同步的基本原理,设计了频率动态补偿算法模块,并搭建测试平台验证了频率动态补偿算法的可行性和实用性,同时根据频率动态补偿后的测试结果分析了同步周期和FORCE10交换机的延迟抖动对时间同步的影响。更多还原

【Abstract】 Background: Time synchronization is one of the core technology of realizing the real-time control of accelerator under the distributed control system architecture. The ordinary crystal frequency deviation of IEEE1588 causes low synchronous accuracy, which doesn’t meet the needs of high precision synchronization. Purpose: This paper proposes an algorithm to improve the synchronization precision caused by the crystal frequency deviation. Methods: According to the basic principle of IEEE1588 time synchronization, a dynamic frequency compensation(DFC) algorithm module was designed and a test platform was built to verify the feasibility and practicability of the algorithm. The influence of the synchronous cycle and delay jitter of the switch on the synchronization accuracy were analyzed. Results: Experimental results showed the great precision improvement of synchronization after using DFC algorithm. Conclusion: Low synchronous accuracy caused by the crystal frequency deviation can be improved by using DFC algorithm implemented for precision time protocol(PTP) of IEEE 1588.更多还原