Application of the Theory of Robust Design in Tolerance Analysis

To analyze the effect of tolerance of composing loop on the tolerance of close loop, the theory of robust design is introduced in the tolerance analysis and the concepts of sensitivity of eligible probability of dimension and sensitivity of eligible probability of product are put forward. The software of calculation is developed by the method of sensitivity tolerance analysis. The effect of tolerance of composing loop on tolerance of close loop is analyzed quantitatively. The conclusion is that the effect of tolerance of composing loop on the tolerance of close loop is less if the sensitivity of dimension yield is less and the robustness of dimension chain is better if the sensitivity of product yield is less by calculation.