Fundamental Mechanisms of Aeroelastic Control with Control Surface and Strain Actuation

A typical section analysis is employed to provide an understanding of the fundamental mechanisms and limitations involved in performing aeroelastic control. The effects of both articulated aerodynamic control surfaces and induced strain actuators are included in the model. The ability of these actuators to effect aeroelastic control is studied for each actuator individually as well as in various combinations. The control options available are examined for single-input, single-output (SISO) and multiple-input, multiple-output (MIMO) classical and optimal control laws. A state-cost-vs-control-cost analysis is performed to assess the effectiveness of optimal linear quadratic regulator (LQR) control laws for different actuators and actuator combinations. The cost comparisons show that strain actuation is an effective means of achieving aeroelastic control and a viable alternative to articulated control surface methods. In addition, the advantages of using multiple actuators to avoid limitations associated with single-actuator systems are demonstrated.