Fault Detection and Recovery Strategy for Partial 1553B Bus Controller RAM Failure of Spacecraft in Orbit

In the spacecraft, 1553B bus controller is the central for the management of bus information exchange, whose reliability directly relates to system security. In recent years, due to the hash space environment in orbit, many cases of spacecraft bus RAM failures caused by the single event effect have occurred both at home and abroad. This paper presents a method for dealing with spacecraft in-orbit bus controller RAM failure. When such a fault occurs on the orbit of a spacecraft, the backup device is firstly enabled instead of the faulty device, and then the faulty device of the faulty device is located. A part of the software module of the bus controller RAM is reconstructed by sending a remote command from the ground to complete isolation of the chip fault area, and finally restore the main 1553B bus controller work to achieve the normal orbital operation of the spacecraft.