Discussion of single event effect (SEE) influence and protection design strategy in avionics

An airborne navigation satellite signal receiver and SEE sensitive device are exposed in 14MeV high-energy neutron beam in the laboratory, the receiver expressed system halted, missing navigation data, and incorrect navigation information, The devices under test (DUT) expressed a single event upset (SEU). According to the test data, the SEE induced failure rate of the LRU is 2.74E-08cm
²
, and the total SEU section of DUT is 1.31E-06cm
²
. At the typical aviation altitude, the failure rate of the receiver is l/6100fh(fight hour). The SEU rate is 1/127 fh. The SEE failure rate of the entire aircraft and the fleet are estimated initially. The research indicates that the current/future avionics are seriously affected by the atmospheric radiation SEE, and the targeted protection design should be adopted. Due to the soft errors caused by SEE is primary, two protection design strategies(failure avoidance and fault tolerance) are compared and analyzed, the fault-tolerant design strategy is more used in avionics.