随机应力下系统可靠度的鲁棒优化

在随机应力条件下建立加速退化模型,设计加速退化试验并估计模型参数,用数学近似方法推导了可靠性均值和方差的计算模型,分别作为鲁棒优化设计模型的约束与目标函数。燃烧室可靠性设计算例结果表明:该方法不仅使系统设计达到可靠性要求,而且有较高的稳健性,有一定的工程实际意义。

Reliability Verification and Robust Design Optimization under Stochastic Stress

The accelerated degradation model was established and the accelerated degradation test was designed to estimate model parameters under the stochastic stress in this paper. The expressions of mean and variance of reliability which were constraints and design objective of robust design optimization model were devised using mathematics approximation method. The computational example of some chamber showed that the method could make the system design reach the requirement of the reliability and was robustness, which was valuable in engineering.