A Reliability Allocation Method for Mechanical Product Based on Meta-Action

For a long time, the machinery's reliability allocation methods have followed the electronics', and thus all of the interactions among moving components and parts in machines are neglected. In fact, the allocated results are not reasonable for mechanical products; even the allocation granularity is not appropriate to guide the reliability design. To overcome these problems, this paper proposes an allocation method based on meta-action. By using the function-movement-action method, we decompose the mechanical product into meta-actions. An action is used as the basic unit of reliability control, and all the parts contributing to the action are treated as a whole. The interactions of the parts which contribute to the same action are treated as the internal forces of meta-actions, and others are considered as the interactions between meta-actions by the consideration of common parts in different units. An illustrative example shows the proposed method makes the results more reasonable and more convenient to guide mechanical product designs.