在同步控制上，应用了“优先与抢占”的方式产生同步信号，纯硬件实现，简单可靠；使用了成熟的数字锁相环来跟踪同步信号。-A strategy of synchronization control, which combines competition coequality and priority, is mentioned in the paper and uses digital phase-lock loop to track synchronization signal