为了在短时间内准确获得 LED照明灯的寿命信息,以3组恒定加速应力的试验数据为基础,采用三参数 Weibull函数描述其寿命分布,基于双线性回归法(BRM)对试验数据进行处理分析,并利用自行开发的寿命预测软件较为精确地得出 LED照明灯在正常工作应力下的寿命。数值结果表明,LED照明灯的寿命服从三参数 Weibull 分布,其加速模型符合 Arrhenius方程,精确预测的 LED照明灯寿命为工程技术人员关于产品的可靠性设计提供技术参考。
In order to accurately obtain the life information of LED lamps in a short time,three-parameter Weibull function was applied to describing the life distribution based on three groups of constant-stress accelerated life test data.The processing and analysis on test data was achieved by Bilinear Re-gression Method (BRM),and the self-developed life prediction software was employed to precisely calculate the life of LED lamps under normal working stress.The numerical results show that the LED lamps life submits to three-parameter Weibull distribution,and the accelerated model meets the Arrhenius equation.The LED lamps’life predicted precisely can provide technical references for engi-neering technicians with regard to the product’s reliability design.
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