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基于加速因子的退化型产品可靠性评估方法 总被引:1,自引:0,他引:1
基于退化轨迹的方法是退化型产品进行可靠性评估的主要方法。针对传统退化轨迹方法在确定产品寿命分布类型方面存在的不足,提出了基于加速因子的统计分析方法。此方法通过加速因子把各加速应力水平下的伪寿命值折算到正常工作应力水平下,利用全部折算值使用Anderson-Darling拟合优度检验方法确定最优寿命分布类型,然后进行可靠性统计推断。使用某型电连接器的加速退化试验数据对提出的方法进行了使用说明和应用验证,对该型电连接器进行了可靠性评估,得出平均寿命为400727 h。 相似文献
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为满足海军战斗力生成模式转变和新型作战力量建设的需求,立足新型水面舰艇设计定型试验实践,系统分析了我国海军舰艇装备研制程序、试验类型、特点和发展需求,从总体性能、综合特性、作战能力和保障能力等方面规划了新型水面舰艇设计定型试验的项目体系,探讨了试验组织实施的阶段划分、模式方法、管理要素和节点流程,提出了基于装备性能、作战能力和作战效能的评估方法和流程,为海军新型水面舰艇设计定型试验的顶层设计和创新实践提供技术支撑。 相似文献
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The performance of subspace estimation algorithms degrades substantially in the presence of mutual coupling and channel discord by the perturbance of the steering matrix. Classical self-calibration algorithms need multidimensional search, optimization and iteration, and large calculation quantity. In order to avoid these shortcomings, a novel joint calibration algorithm using rotational invariance techniques is proposed in this paper. Two sub-arrays' steering matrix can maintain the rotational invariance property in the presence of array errors by switching channels and selecting sub-arrays according to the characteristic of the mutual coupling matrix. So, the estimation of signal parameters via rotational invariance techniques (ESPRIT) algorithm is applicable to mutual coupling and channel discord scenarios. The algorithm requires neither searching the spectrum peak nor estimating error parameters, and the calibration of array errors does not need an additional calculation quantity. Simulation results show that the proposed algorithm can restrain mutual coupling and channel discord. The performance of the algorithm is equivalent to the performance of the standard ESPRIT algorithm without errors. 相似文献