Optimized Research On The Model Of Electromechanical Product Component’s Safety-critical Degree

In order to increase electromechanical products’ safety efficiently, it is vital tolocate safety-critical components in a scientific and accurate way. This article aims atoptimizing the existing model of component’s safety-critical degree by analyzingsystem’s dynamic characteristics.In this article, FMECA method is employed to obtain all the failure modes of ancomponent and also each failure mode’s criticality to the target mishap after achievingthe logical relationship between failure mode and its contribution to a mishap. DFTAis introduced to make a qualitative and quantitative analysis of the effect that eachcomponent’s failure mode’s occurrence does to a mishap type’s failure. Newequations are brought forward to compute the quantitative significance coefficient andcriticality significance coefficient of component’s different failure modes in DFTAbased on the existing quantitative research of component’s failure. Then the synthesisof component’s safety-critical degree is made considering all the possible mishaptypes the system can have. Finally, an example of elevator gate system is applied inorder to increase the practicability of this article.Through the synthesis of component’s safety-critical degree and the analysis ofsafety-critical degree, the dynamic characteristics of component’s safety-criticaldegree and safety-critical component is concluded.