基于DSP和HI-6121的1553B远程终端通讯技术研究

Study of 1553B bus RT Communication Technology Based on DSP and HI-6121

随着1553B总线成为航电总线的主要标准,载荷空间与电源功率有限的无人机,对1553B总线机载设备的小型化、低功耗和低成本提出了更高的要求,以往的技术方案已无法满足;通过对1553B总线远程终端技术的研究,结合某型挂飞训练弹的具体要求,对比国内外多款1553B协议芯片的功能、封装尺寸、功耗和价格后,提出了一种以DSP(TMS320F2812)为控制核心,HI-6121为协议芯片的1553B远程终端技术方案,详细介绍了HI-6121的技术特点,技术方案硬件设计原理和软件设计流程;该方案已应用于某型挂飞训练弹与导弹模拟器中,通过了工程阶段和定型阶段的各种性能试验与环境适应性试验,试验结果表明基于DSP和HI-6121的远程终端与1553B总线控制端的通信稳定、可靠,满足了无人机机载设备小型化、低功耗和低成本的需求,可靠性高,通用性好。

With 1553B bus becoming the main standard of avionics bus, UAVs with limited load space and power supply put higher requirements for the miniaturization, low power consumption and low cost of 1553B bus airborne equipment, which cannot be met by previous technical schemes. Based on the research of 1553B bus remote terminal technology and the specific requirements of a certain type of hanging missile, and comparing the functions, package size, power consumption and price of several 1553B protocol chips at home and abroad, a 1553B remote terminal technology scheme with DSP (TMS320F2812) as the control core and HI-6121 as the protocol chip is proposed. The technical characteristics of HI-6121,system hard technical scheme and flow chart of system software design are introduced in detail. The scheme has been applied to a certain type of hanging missile and missile simulator, and has passed various performance tests and environmental adaptability tests in engineering and modeling stages. The test results show that the communication between remote terminal based on DSP and HI-6121 and 1553B bus control terminal is stable and reliable, which meets the requirements of miniaturization, low power consumption and low cost of UAV-borne equipment, and has high reliability and versatility.