分布式控制系统精确时钟同步技术

Precise Clock Synchronization for Distributed Control System

为了克服传统的分布式测量和控制系统存在的诸多缺点,提出了传输和同步系统时钟的新方案。该方案采用IEEE 1588精确时钟同步协议以及在控制系统中广泛应用的以太网来实现。实现过程中,由硬件辅助生成时间戳,保证了系统对主从时钟的偏移时间和报文传输的延迟时间的测量、计算和精确控制。测试结果表明,从时钟的同步精度能够满足系统的应用需求,减少了测控系统中的专用时钟线缆的连接数,对类似的时钟同步需求具有很好的推广应用价值。

To overcome various demerits in traditional distributed measurement and control systems,by adopting IEEE 1588 precise clock synchronization protocol;the scheme of transmitting and synchronizing the system clock via Ethernet in measurement and control systems is proposed.During implementation,the timestamp is generated in aid of hardware,to guarantee the system precisely measure,calculate,and control the time offset between master and slave clocks,as well as the time delay of message transmission.The test result shows that the synchronous accuracy of the slave clock can satisfy the application requirement of system,and the quantity of the linkages of dedicated wires or cables of clock in measurement and control system is reduced.This technology possesses good popularization and application value for similar clock synchronization requirement.