多跳变(MT)故障模型是目前提出的具有完整故障覆盖率的一种总线测试故障模型,但其测试矢量集存在严重的矢量冗余。提出了一个基于路径遍历算法的测试矢量压缩方法,以MT模型为基础,经压缩简化后得到更适用于SoC总线测试的BMTC故障模型。实验结果表明,使用提出的压缩方法,可以在保证MT模型故障覆盖率不变的情况下,将测试矢量数减少至原来的1/8,从而大大节省总线测试成本,提高测试效率。 Multi-trip (MT) fault model is a bus fault model with complete fault coverage, but its test vector set has serious vector redundancy. A test vector compression method based on path traversal algorithm is proposed. Based on the MT model, the BMTC fault model which is more suitable for SoC bus test is obtained after being compressed. Experimental results show that the proposed compression method can reduce the number of test vectors to 1/8 while keeping the fault coverage of MT model unchanged, which can greatly reduce bus test cost and improve test efficiency.