Reliability analysis of self-developed mechanical Meta action test-bed based on FTA

Abstract

In view of the complex mechanical product assembly failure frequency and difficult to control the problem. In this paper, based on the independent research and development of the reliability test-bed of the mechanical Meta action unit, the reliability of the worm rotation Meta action test-bed is analyzed by the method of fault tree analysis (FTA). Firstly, the structure model of the action assembly unit of worm rotating Meta is established. By analyzing the assembly condition of the action unit and using the principle and steps of fault tree, the assembly fault tree model of the test-bed of worm action unit is established, and the minimum cut set is obtained. On the basis of the minimum cut set, the importance of each assembly behavior is determined by quantitative analysis The basic events are sorted according to the importance degree; each basic event is determined as the reliability control point, and the reliability control measures of the assembly process of the meta action unit are formulated by analyzing the fault source of the reliability control point. Through quantitative analysis, the probability of the top event is 0.163, and the reliability of the experimental device system is 82.7%. The results show that FTA is simple, easy to understand, universal and reasonable in conclusion to analyze the reliability of the self-developed action unit test-bed. The modeling idea, calculation process and analysis method formed provide a reference for the reliability analysis of the self-developed action unit test-bed.