Abstract: Aiming at the conflict and decoupling problem between multiple disciplines in process of product design, a robust collaborative decision method is proposed, which adopts variable interval to denote the uncertainty of design variables and then employs non-cooperative game theory to describe multidisciplinary collaborative decision as interval based constraint resolving problem. For the formulated problem, a two-step resolving strategy is presented to get the robust decision scheme of product design, that is, firstly to filtrate the redundancy in the interval of design variables by using interval consistency algorithm, and secondly search for the robust decision value for the design variables in their consistent interval with design capability indices as rule of robustness evaluation. And also a kind of feasibility censor based immune chaotic searching algorithm is developed. Finally, a singular disk elastic rotor system is used as an example to achieve conflict decoupling and collaborative decision between tribology and dynamics. The design results validate the effectiveness and reliability of proposed decision approach.

Key words: Collaborative decision, Consistency algorithm, Design capability indices, Game theory, Robust decision