Improved Aeroelastic Model for Active Vibration Suppression of Smart Composite Wind Turbine Blades including Rotatory Inertia Effects

Horizontal axis turbines are one of the most commonly used renewable energy electricity generator. Due to their structural flexibility and axis misalignment, the rotor disks are subjected to considerable levels of vibrations. In order to suppress the vibration levels of a horizontal axis wind turbine blade, active vibration control method have been used for some time. In the proposed work one of the most effective of these active methods will be studied numerically, and the results will be verified experimentally. The typical wind turbine blade section used in this study is NACA 0012 airfoil. To study the effect of control action, different controllers will be investigated using a single PZT piezoelectric actuator and a single PZT piezoelectric sensor that are bonded to the upper and lower surface of the turbine blade. Vibration analysis will be conducted, and the dynamic characteristics of the smart systems are obtained using approximate analytical methods. The smart structure is modeled in state space using the concept of piezoelectric theory. The two controllers will be designed for minimum control power, and the control force will be investigated. The first controller is a Proportional-Derivative (PD) controller whereas the second is a linear quadratic regulator (LQR) controller. Both controlled systems will be compared for the response characteristics and maximum displacement levels. MATLAB software and Simulink will be used to simulate all dynamic systems. An experiment will be conducted to determine the natural frequencies and mode shapes, as well as the forced response of the controlled smart systems. These results will be used to validate the numerical results.