I am doing some research about Individual Pitch Control (IPC). Now I am trying to design an IPC system based Proportional-integral (PI) method and validated on the FAST software. I am using NREL 5MW wind turbine with baseline generator torque and pitch controller. My design is shown as the attachment.
Before the Coleman transformation, the flapwise bending moments are filtered with a notch filter tuned to the 1P frequency and scaled. After the reverse transformation, the signals are filtered again by a low-pass filter to obtain smooth control signals. According to the above design, the parameters of the I controllers has been tuned to the best. However, the performance of IPC controllers is not good. The magnitude of the flapwise blending moment of blade 1 is barely reduced.
Is there anything wrong with my IPC design? Can you help me with the possible faults and possible improvement methods? Thanks a lot.
This forum if for discussing controls. Questions about how to implement controls in FAST are more appropriate to the CAE Tools forum.
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