The paper objective is to optimize the dynamic behavior of the wicket gate mechanism servicing a Francis hydraulic turbine. This mechanical system is employed to adjust the fluid flow by controlling the opening of its movable blades. The dynamic model of the mechanism is built using the Lagrange equations, in Newton-Euler formalism supplemented by the method of Lagrange multipliers. Computer processed mathematical models are obtained by finite elements modeling and experimental investigation, proposing to identify the variation laws in time and frequency for many dynamic parameters. Database configuration in order to control the turbine operation is actually based on a virtual prototyping with 3D parametric three-dimensional models and simulations of the turbine wicket gate mechanism. The variation laws in time and frequency of several dynamic parameters are identified using a modal-dynamic analysis, experiments and finite element method, the virtual prototype testing and control being realized with ADAMS-MSC software.
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