I have a query regarding the degrees of freedom (dof) Q_TFA1 and Q_T1SS of the linear state-space system. Specifically, I am curious to know if these degrees of freedom correspond to the tower top coordinate system (xp, yp, zp) and therefore do not yaw with the nacelle.
Traditionally, the fore-aft direction aligns with the main wind direction in a local coordinate system that rotates with the yaw of the turbine. However, I would like clarification on whether I need to perform a coordinate transformation if I intend to examine the global tower displacement in the x and y directions.
Your insights on this matter would be greatly appreciated.
Thank you in advance for your assistance.