Real-time data exchange of beam steering system for phased array antenna
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摘要: 波束控制系统是高功率相控阵天线的神经中枢，负责天线阵面中所有单元相位的精确控制和状态监测任务。为实现天线阵面的快速、精确波束转换，采用分布式拓扑结构和嵌入式实时操作系统，设计了两级分布式波束控制方案，开发了基于VxWorks的相控阵天线主控系统。通过UDP协议实现主控系统与其他系统的多节点网络通讯；针对高速、实时通讯需求，利用VxWorks多任务编程接口，设计了一种基于双缓冲队列的Socket通讯方法；为使通讯被各方正确解析，制定了自定义的应用层协议。基于VxWorks的相控阵天线主控系统的开发应用，验证了方案的可行性以及控制软件的可靠性和稳定性。Abstract: Beam steering system serves as the nerve center of high power phased array antenna, and it is responsible for the precise phase control and status monitoring of all element in antenna array. To achieve fast and accurate beam steering conversion, two level distributed beam steering scheme is designed using distributed topology and embedded real-time operating system VxWorks, and beam steering host system of phased array antenna based on VxWorks is developed. Multi-node network communication between beam steering host system and other systems is achieved via UDP protocol, and VxWorks multitask programming interface is utilized to design a Socket communication method based on the buffering queue to meet the high-speed and real-time communication demands, and a custom application layer protocol is designed for parties to accurately interpret communications. Feasibility of the scheme and reliability and stability of the control software have been verified through developing and applying the phased array antenna beam steering host system based on VxWorks.
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图 4 基于缓冲队列的多任务通讯软件架构
Figure 4. Software architecture of multi task communication based on buffer queue
表 1 UDP数据包丢包情况测试
Table 1. Experimental results of UDP packet loss
interval time/ms sent packets received packets bytes per packet loss packets loss packets rate/% 0 100 000 99 907 128 93 0.093 5 100 000 99 995 128 5 0.005 10 100 000 99 998 128 2 0.002 
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