考虑广义耦合的多应力加速寿命评估方法
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张帆, 田润操, 王鹏, 董磊
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Multi-stress accelerated life evaluation method considering generalized coupling
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Fan ZHANG, Runcao TIAN, Peng WANG, Lei DONG
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表8 三应力模型自适应SCA值、牛顿迭代MLE值及MSE
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Table 8 Triple-stress model SCA value, Newtonian iterative MLE value and MSE
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| 模型 | 待求参数 | SCA | 牛顿迭代法 | MSE/% | | 最优广义耦合 | lnα0 | 8.031 5 | 8.081 6 | 4.361 7 | | α1 | 1.117 6 | 1.119 1 | 4.908 0 | | α2 | 0.759 4 | 0.828 2 | 1.905 2 | | α3 | 1.350 7 | 1.232 7 | 4.406 5 | | α4 | 0.966 8 | 0.954 5 | 3.428 1 | | α5 | 1.130 6 | 1.177 8 | 2.429 0 | | 传统简单耦合 | lnα0 | 8.416 6 | 8.443 8 | 3.025 6 | | α1 | 2.116 4 | 2.297 3 | 3.016 6 | | α2 | 1.615 5 | 1.677 8 | 0.943 5 | | α3 | 0.288 2 | 0.276 7 | 0.740 2 | | α4 | -0.605 1 | -0.606 6 | 0.401 2 | | α5 | 3.984 1 | 3.992 1 | 2.701 6 | | 备选广义耦合 | lnα0 | 7.945 9 | 7.882 4 | 2.528 2 | | α1 | 3.824 1 | 3.862 8 | 2.728 2 | | α2 | 0.085 7 | 0.086 7 | 2.214 2 | | α3 | 3.276 0 | 3.171 5 | 2.291 7 | | α4 | -0.405 1 | -0.429 4 | 2.587 7 | | α5 | 0.274 1 | 0.277 9 | 1.062 2 | | 应力不耦合 | lnα0 | 10.117 8 | 10.121 3 | 2.633 4 | | α1 | 4.517 8 | 4.526 2 | 0.856 0 | | α2 | 1.635 3 | 1.580 4 | 2.415 7 | | α3 | 2.788 0 | 2.848 7 | 1.091 8 | | α4 | - | - | - | | α5 | - | - | - |
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