1. 15 MW Offshore Reference Turbine Architecture
Simulates the IEA 15-MW offshore reference wind turbine with standard 240m rotor diameter (blade length 118m), hub height 150m, rated wind speed 10.59 m/s, and rated rotor speed 7.56 RPM.
2. Coleman Multi-Blade Coordinate (MBC) Transform
Decouples rotating 1P flapwise blade root bending moments [My1, My2, My3] into stationary non-rotating tilt (Md) and yaw (Mq) coordinate axes using the Park/Coleman orthogonal transformation matrix.
3. Individual Pitch Control (IPC) Damping
Independent PI feedback controllers compute cyclical blade pitch increments Δβi, suppressing periodic 1P aerodynamic load imbalances induced by vertical wind shear and atmospheric turbulence without compromising generator power output.
4. Rainflow Cycle Counting & Damage Equivalent Load (DEL)
Evaluates cumulative blade root fatigue life consumption via real-time ASTM E1049-85 rainflow counting and Palmgren-Miner damage accumulation, demonstrating >28% fatigue reduction under IPC.