基于UZ2400的弹载遥测发射机设计

Design of missile-borne telemetry transmitter based on UZ2400

为了有效应对精确打击武器飞行试验遥测需求的变化与增长,提出一种基于Zigbee技术的弹载导航信息的无线传输系统设计方案。无线遥测网络节点以ARM+UZ2400架构为核心,根据遥测试验需求,采用两级功率放大结构对输出射频信号进行放大,弹载发射天线采用基于套筒结构的小型化偶极子天线设计,有效解决弹上可用空间不足的问题。系统的软件部分依据IEEE 802.15.4标准设计数据处理框架,完成导航信息的传输。最后,搭建遥测网络节点数据传输系统的测试框架,完成对通信链路质量和数据传输准确性的测试。试验结果表明,接收的信号强度指标误差稳定在0.505,16个通道水平方向坐标精度、垂直方向坐标精度、水平方向测速精度以及垂直方向测速精度的与设计指标一致率分别为81.25%、100%、100%、100%。由此可以认为该系统能够在2.4 GHz频段实现对遥测目标的实时位置信息以及速度信息进行准确、稳定地传输,并且满足弹上系统小型化、通用性的设计要求。

In order to effectively cope with the change and growth of telemetry requirements of precision strike weapon flight test,this paper proposed a wireless transmission system design scheme of missile navigation information based on Zigbee technology.The node of wireless telemetry network was based on ARM+UZ2400architecture.According to the requirements of telemetry test,a two-stage power amplifier structure was adopted to amplify the output RF signal.The missile transmitting antenna was designed with a miniaturized dipole antenna based on sleeve structure,which effectively solved the problem of insufficient available space on the missile.In the software part of the system,the data processing framework was designed according to IEEE 802.15.4standard to complete the transmission of navigation information.Finally,the test framework of the telemetry network node data transmission system was built to test the quality of communication links and the accuracy of data transmission.The test results showed that the Received Signal Strength Indicator error stabilized at 0.505,and the consistency rates of horizontal coordinate accuracy,vertical coordinate accuracy,horizontal velocity accuracy and vertical velocity accuracy with the design indicators of 16channels were 81.25%,100%,100%and 100%.Consequently,the system can accurately and stably transmit the real-time position information and velocity information of the telemetry target in 2.4GHz band and met the design requirements of miniaturization and versatility of the missile system.