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一、产品可靠度和产品失效率1.产品可靠度对产品进行可靠性计算的目的是为了求得产品可靠度R(t)。所谓产品可靠度就是指产品在规定使用条件下,工作到规定时刻t时无故障的概率,即R(t)=P(T≥t).其中T是产品的工作时间,它是一个随机变量。实际上当某产品的工作时间T=t时,该产品无故障工作时间并没有达到规定时刻t,可以说在时刻t时,产品是不可靠的。所以严格地讲,产品的可靠度应该是:R(t)=P(T>t)(1)一般情况下,在生产过程中,可靠的产品总是比
First, the product reliability and product failure rate 1. Product Reliability The reliability of the product is calculated in order to obtain product reliability R (t). The so-called product reliability refers to the product under the specified conditions of use, to work at the specified time t fault-free probability, that R (t) = P (T ≥ t). T is the product of the working hours, it is a random variable . In fact, when the working time of a product is T = t, the non-defective working time of the product does not reach the specified time t, and it can be said that the product is not reliable at time t. So strictly speaking, the reliability of the product should be: R (t) = P (T> t) (1) In general, in the production process, reliable products are always better than