ACTIVE FLUTTER SUPPRESSION OF COMPOSITE PLATE WITH PIEZOELECTRIC ACTUATORS

摘要

This paper describes the use of piezoelectric actuators for the design of active flutter suppression system of a laminated composite plate-wing. The Rayleigh-Ritz method is used to develop the equations of motion of a laminated plate-wing model with piezo actuators. State space aeroservoelastic mathematical model by Rational Function Approximation(RFA) of the unsteady aerodynamic forces is derived. The Minimum State method combined with the optimization technique is adapted for RFA. The linear quadratic regulator theory is employed in active control of the system. The effects of flutter suppression on locations of piezo actuators are examined. The optimal placement of piezoelectric actuators for flutter suppression subject to minimize the performance index is determined analytically by using the optimization technique. The results show the capability of piezo actuators for the control of wing flutter. Numerical simulations of a model with the optimal actuators placement show a substantial saving in control effort compared with the initial model.