AEROELASTIC ACTUATION USING ELASTIC AND INDUCED STRAIN ANISOTROPY

The effects of elastic anisotropy, induced strain anisotropy, and geom etric sweep on piezoelectric aeroelastic authority are studied via a h ybrid Ritz-typical section. The governing parameters for piezoelectric actuation are determined: the piezoelectric authority parameter, the piezoelectric induced strain anisotropy, and the piezoelectric angle. Three distinct piezoelectric actuators are introduced: 1) an isotropic actuator, 2) a ''bend'' anisotropic actuator, and 3) a ''twist'' anis otropic actuator. Open- and closed-loop analyses are conducted to comp are the relative authority of the three piezoelectric actuators and a trailing-edge nap. A combination piezoelectric actuator is introduced that provides the best overall performance.