National Renewable Energy Laboratory
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The dynamics of wind turbine rotor blades are conventionally expressed in rotating frames attached to the individual blades. The tower-nacelle subsystem though, sees the combined effect of all rotor blades, not the individual blades. Also, the rotor responds as a whole to excitations such as aerodynamic gusts, control inputs, and tower-nacelle motion—all of which occur in a nonrotating frame. Multi-blade coordinate transformation (MBC) helps integrate the dynamics of individual blades and express them in a fixed (nonrotating) frame. MBC involves two steps: transforming the rotating degrees of freedom and transforming the equations of motion. Reference 1 details the MBC operation. This guide summarizes the MBC concept and underlying transformations.
Engineering | Mechanical Engineering | Oil, Gas, and Energy | Power and Energy
FAST; MATLAB-based script; MBC3; Multi-blade coordinate transformation; Turbines—Blades; Vertical axis wind turbines; Wind turbines
Bir, G. S.
User's guide to MBC3: Multi-blade coordinate transformation code for 3-bladed wind turbine.
Available at: https://digitalscholarship.unlv.edu/renew_pubs/57