External Controller Design Tool for GH Bladed and Simulink Download the External Controller Design Tool The external controller design tool can build DLL files from Simulink diagrams for GH Bladed. The UPWIND/NREL 5MW models with collective and individual pitch controllers examples are included. The tool requires the programs GH Bladed, Mathworks Matlab with Real-Time Workshop, and Microsoft Visual Studio C++ (Express). (Username and password are available upon request by e-mail) Delft Center of Systems and Control Delft University of Technology