电子装备多值测试故障诊断策略设计

Fault Diagnosis Strategy Design of Electronic Equipment Based on Multivalue Test

对于复杂电子装备,在实际测试中测试不通过的情况可能有多种,如果依然采用基于二值测试的故障诊断策略设计算法,将损失大量信息,降低测试精度和效率。构造了基于r元霍夫曼编码的启发函数,提出了基于多值测试的故障诊断策略设计算法;将测试的多值输出作为独立信号,提出了基于关联矩阵扩展的多值测试故障诊断策略设计算法。实例验证表明,算法提高了故障隔离精度,为复杂电子装备的故障诊断策略设计提供了高效算法。

For complex electronic equipment, the practical test output may be variform when it fails. A great deal of information would be ignored if a binary test is applied, and the test precision and efficiency would also be decreased. A heuristic function based on Huffman coding with r elements was constructed, and a fault diagnosis strategy design algorithm based on multivalue test was put forward. The multivalue outputs were taken as the independent signals, and then a fault diagnosis strategy design algorithm based on dependency matrix extension was presented. Finally, an example shows that the fault isolation precision is improved and the algorithm is effective. It offers an efficient algorithm to the diagnosis strategy design of complex electronic equipment.