Narrow Results

The life of mechanical products and its parts can be better described by Weibull distribution, but the life fitting degree of complex mechanical products and its parts with two or more than two kinds of failure modes is often not good by using single Weibull distribution. Based on the single Weibull distribution theory analysis, this paper analyses reliability and reliable life of mixed Weibull distribution, estimates parameters, and tests goodness of fit. Taking a certain type of hydraulic pump as an example to assess its reliable life and reliability index, and it can also provide a practical method for reliability assessment of other mechanical products.

Disruptive innovation is an effective process of product innovation, and the analysis of disruptive technological opportunities is an entry point of developing disruptive innovative products. Based on the fact that the sub-functions of a product get different degree of attention from customers or engineers, a construct of functional role is introduced and a classification is proposed. According to the definition and characteristics of new market disruptive innovation, functional roles of functions that a product has are adjusted, and an approach to identify some disruptive technological opportunities of mechanical products was proposed. Finally, air conditioner was taken for example, and the generation of disruptive innovative opportunities verifies the feasibility of the approach.