PURDUE UNIV LAFAYETTE IN SCHOOL OF AERONAUTICS AND ASTRONAUTICS
This report summarizes aeroservoelastic tailoring studies in which adaptive material actuators are used to control structural deflection of aeroelastic systems. The problem is to furnish enough directed control of a system to make the control of the phenomenon feasible. Specific research problems considered are choice of the actuator material for effective control geometric arrangement for active control and optimum coverage of surface panels for effective control. A specific method of controller design is suggested to determine the limits of control. It is applied to a typical section whose response to random atmospheric turbulence is to be controlled. A finite element method is developed to model actuator and sensor output for plate-like actuators and its use is illustrated for wing-like configurations to demonstrate the benefits of orthotropic material actuators. Finally, the problem of optimum actuators to supply deflection of panels for wing surfaces is examined to determine optimality criteria for such panels and to use strain energy as a guide for efficient use of actuatorhost plate combinations. Piezoelectric actuators, Aeroservoelasticity.