On-Demand Aerodynamics in Integrally Actuated Membranes with Feedback Control

摘要

This paper is a numerical investigation on model reduction and control system design of integrally actuated membrane wings. A high-fidelity electroaeromechanical model is used for the simulation of the dynamic fluid-structure interaction between a low-Reynolds-number flow and a dielectric elastomeric wing. Two reduced-order models with different levels of complexity are then derived. They are based on the projection of the full-order discretization of fluid and structure on modal shapes obtained from eigenvalue analysis and proper orthogonal decomposition. The low-order systems are then used for the design of proportional-integral-derivative and linear-quadratic-Gaussian feedback schemes to control wing lift. When implemented in the full-order model, closed-loop dynamics are in very good agreement with the reduced-order model for both tracking and gust rejection, demonstrating the suitability of the approach. The control laws selected in this work were found to be effective only for low-frequency disturbances due to the large phase delay introduced by the fluid convective time scales, but results demonstrate the potential for the aerodynamic control of membrane wings in outdoor flight using dielectric elastomers.