Research on High Precision Master-slave Clock Synchronization Based on 1588 Protocol

摘要

With continuous development of industrial automation, precision measurement and control, it is more and more important to conduct research on the technology of high precision time synchronization. The 1588 protocol, which provides sub microsecond network time synchronization, has received special attention from all walks of life. This research is to achieve the 1588 protocol high precision master slave time synchronization based on the low pass filter and sliding mode control. In this study, the influence of the frequency jitter of the master and slave clock and the stochastic error of the measurement process is reduced by low-pass filter; Then the sliding mode filter is used to suppress and optimize the crystal frequency drift caused by the temperature and other factors of the clock; Finally, the simulation results show that the research method in this paper is able to effectively improve the synchronization accuracy of the master and slave clocks, and realize the sub microsecond requirement of the 1588 protocol.