1553B总线电路冷备份使用情况下总线端口潜通路分析验证

Latent path analysis test of bus port with 1553B bus circuit cold backup application

航天系统单位在应用1553B总线电路过程中,为了增加设备单机的可靠性,使用了两组1553B总线单机,两组单机总线输出并联在一起,一组单机上电使用,一组单机断电处于冷备份状态,两组系统互为冷备份,正常工作时,要求互为冷备份的单机不能相互影响。针对该应用详细介绍了1553B总线电路内部总线端口结构,并对冷备份使用情况下总线端口的潜通路问题进行了详细测试验证,通过测试数据分析,证明了两组1553B总线电路在冷备份使用情况下是稳定可靠的,两组单机没有相互影响。

In the application of 1553B bus devices in space system units,in order to increase the reliability of the stand-alone devices,two 1553B bus units are used.Two stand-alone devices′bus outputs are connected,a set of stand-alone devices powered up for use,a set of stand-alone devices powered outages in a cold backup state,two sets of stand-alone devices are cold backup for each other.When the devices functions normally,cold backup of each other can not affect each other.This article introduces the internal port structure of the 1553B bus circuit for this application,and the latent access problem of bus port under the condition of cold backup is tested and verified in detail.Through test and analysis,it is proved that the two 1553B bus circuits are stable and reliable under the condition of cold backup without mutual influence.