Aiming at the synthesis problem of four bar linkage mechanism for generating function

the analysis of the influence of random disturbing factors on the movement accuracy of mechanism is analyzed

and the model for fuzzy-robust design optimization is presented.The support vector regression（SVR） is used as a surrogate model for computing the values of nonlinear functions such as fuzzy probability

and then the computational efficiency of fuzzy-robust design optimization is distinctly improved.The arithmetic steps of proposed method are introduced.The design example shows that this method is able to make the movement accuracy of mechanism match up to the tolerance of each linkage in reason

so it is effective in engineering application.