遥测数据选择器的设计与研究

Design and Research of Telemetering Data Selector

摘要:

飞行控制组件测试中,多套组件需要在同一温度梯度进行串行测试；针对这一需求,设计开发了一种既可程序控制,又可手动控制的多通道BMK遥测数据选择器；该数据选择器主要包括FPGA模块、通道选通控制地址缓冲模块、BMK接收模块、BMK转发模块、指示电路模块、供电模块和时钟电路模块；该设计以FPGA为核心,功能灵活、结构精简,而且每个通道BMK遥测数据中的各路信号延时可调,提高了BMK遥测数据的传输精度；试验中对BMK遥测数据选择器的5个通道均进行上百次数据帧收发实验,接收数据正确；结果表明,该数据选择器工作稳定,设计合理,而且有效缩短了测试时间,提高了测试效率。

Abstract:

In this paper, a BMK telemetering multiplexer, which can be controlled by both programming and manual, is developed to meet the demand of a few flight control subassemblies being tested in the same temperature gradient. The multiplexer consists of FPGA, selected channel address buffer, BMK receive module, BMK transmitting module, indicating circuit, clock circuit and so on. Owing to the FPGA module, the multiplexer functions flexibly and has brief structure. Furthermore, signals of each channel are adjustable and delayed, which increases transmission accuracy of BMK telemetering data. Different data has been transmitted through five channels to test the stability of data selector and results are correct. On the whole, experiments prove that the multiplexor functions stably. Besides, it cuts down testing time, therefore improve the testing efficiency. 