There are a lot of uncertain factors in the gearbox transmission system of wind turbine. In this paper the controllable factors and uncontrollable factors in gearbox transmission system were analyzed; combining the optimization design theory and robust design theory the robust mathematical model of transmission system was established. In the model we take volume of gearbox as objective function and bending fatigue strength and contact fatigue strength as main constraints. Compared with conventional design the proposed method can reduce the volume of gearbox and improve reliability and robustness of transmission system.

Application of robust design to gearbox transmission system

A deterministic method was developed to analyze the robustness of constraints in robust designs.The method first analyzed the variations of the constraints by considering the uncertain factors and then quantified the robustness of the constraints using maximum variation analysis.A two-level optimum mathematical model was constructed by adding the maximum variations to the original constraints as penalty functions.Top-level optimization was used to solve the original mathematical model with lower-level optimization used to judge the robustness of the constraints.This method does not require a presumed probability distribution of the uncertain factors or constraint gradient information.Example results show that the approach is feasible for robust design.

Feasibility robustness analysis in robust optimization designs

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Feasibility robustness analysis in robust optimization designs