存储器子系统高速数传长线链路设计建模与应用

Modeling Design and Application of High-speed Long-distance Data Transmission Route for Memory Subsystem

存储器子系统是获取飞行器飞行试验数据的一种途径,射前检测是飞行器发射前对其进行的最后一次把关,其结果直接影响对存储器子系统状态的判断,而存储器子系统高速数传长线链路负责射前检测数据的传输,是影响存储器子系统状态检测结果的关键因素;针对存储器子系统射前检测链路的设计问题,通过引入无线链路模型分析方法,建立了本长线链路计算模型;围绕传输信号的特性参数进行链路设计,取代了以往搭建实际测试链路的过程;同时针对存储器子系统射前检测链路测试问题,引入了射频通路测试方法,采用了矢量网络分析仪进行链路衰减测试,验证了链路设计结果;按照该模型设计的系统链路余量经测试大于5dB。

Memory subsystem is designed to obtain flight test data. The result of final inspection before launch directly influences the judgment of memory subsystem state. Data is transmitted by high--speed long--distance data transmission route for memory subsystem, which makes it a key factor in state judgment. The purpose is to design data transmission route for memory subsystem with route calculation modeling and the introduction of radio frequency route modeling in cable transmission. The route calculation modeling, based on signal pa rameter, replaces real cable test before. The introduction of radio frequency route modeling and vector network analyzer is proven effective in route attenuation test and memory subsystem field test, which verifies the design of high--speed long--distance data transmission route for memory subsystem. Basing on the model, the system route is designed. The test result of route margin is more than 5 dB.