Automatic working principle screening method based on function execution sequence

Abstract

The invention discloses an automatic working principle screening method based on a function execution sequence. The method comprises the steps of 1) inputting functions and an execution sequence of aproduct, a working principle set retrieved based on the functions and a corresponding relationship between the working principles and the functions; 2) describing a physical effect which can be executed by a working principle and an implicit constraint relationship between the physical effects; 3) defining a working principle screening rule based on a function execution sequence; and 4) screeningout infeasible working principles and combinations thereof based on the working principle screening rule, and removing the design scheme containing any infeasible working principle or combination thereof, thereby obtaining all feasible design schemes capable of realizing system functions. According to the method, unreasonable schemes can be eliminated as much as possible in the early conceptual design stage of the system, so that project rework or failure caused by early design defects is avoided, and the quality and efficiency of product conceptual design can be improved.

Description

technical field [0001] The invention relates to the technical field of product engineering design, in particular to an automatic screening method for working principles based on function execution sequence. Background technique [0002] Conceptual design is the most innovative stage in the process of product engineering design. Its purpose is to formulate functional structures according to given tasks, and to seek appropriate working principles and their combinations, etc., so as to obtain design solutions that meet functional and structural requirements. Conceptual design usually includes three steps: functional decomposition, working principle search and design scheme evaluation. When searching for the working principle, usually only consider whether the working principle can satisfy the continuous physical transformation process described by the system function, but not consider whether the working principle can satisfy the discrete execution sequence of the system functi...

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Problems solved by technology

It can be seen from the above rules that the matching is also judged by the input and output streams of a single function, without considering the relationship between functions

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