The main objective of this study is to design an active control system for flutter suppression of a composite wing using segmented piezoelectric actuators. The control system design, especially using optimal output feedback design, is performed for the active flutter suppression. For the aeroelastic control , the piezoelectric actuator must create substantial changes in surface shape to generate the aerodynamic loads. From piezoelectric parameters (location, size,and thickness), which affect the structural properties as well as the control characteristics, the thickness and size of the actuator are held constant. The optimization technique is applied to find the best locations of the actuators for flutter control subject to minimize the control performance index. The results reveal the great potential of the piezoelectric materials to control flutter. The closed-loop dampimg ratios are imposed so that the control system has more stability margin and, therefore, higher critical aeroelastic airspeed. However, heavy constraints on the damping ratio may result in higher gain matrix and more control efforts required for flutter suppression. As the optimization progresses, a tradeoff between the reduction of the performance index and satisfaction of constraints on the closed damping ratios is neede to determine the best locations of the piezoactuators. The results show the application of piezoactuators to the control of wing flutterand about a 49 % increase in flutter speed compared with the open-loop configuration. Numerical results also show that a substantial savings in the control performance index is obtained from the optimization. In this paper, the power requirement has not been addressed. Future research will include the power requirement as well as the piezoelectric parameters, the ply orientation, and the thickness of the laminate.


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    Title :

    Optimal design of composite lifting surface for flutter suppression with piezoelectric actuators


    Additional title:

    Optimale Positionierung von piezoelektrischen Aktoren an Verbundstoff-Tragflächen zur Unterdrückung von Flatterschwingungen


    Contributors:
    Nam, C. (author) / Kim, Y. (author)

    Published in:

    AIAA Journal ; 33 , 10 ; 1897-1904


    Publication date :

    1995


    Size :

    8 Seiten, 12 Bilder, 2 Tabellen, 29 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English