An impedance approach to the design of optimal actuator location for acoustic response synthesis

作者：Lin C C^*

来源：Smart Materials and Structures, 2010, 19(5): 055021.

DOI：10.1088/0964-1726/19/5/055021

We present a method for optimization of the location of the induced-strain actuator for acoustic response synthesis, based on the impedance technique. A dynamic model that couples the actuator impedance, the host structure impedance and the acoustic impedance is developed and then utilized to determine the optimal location of the actuator. The actuator power factor concept describes the transfer efficiency of the supplied electrical energy into the host structure. This work is based on the power factor and provides an alternative to the traditional optimization methods for determining where to bond the actuator. For an intelligent structure which is usually bonded with multiple actuators, a modified impedance model including the mass effect resulting from the actuators themselves is also proposed. Numerical examples are presented to show the influence of the mass effect on the power factor and to illustrate how to implement this method to design the optimal location of the actuator for acoustic synthesis.

• 出版日期2010-5