The problem of vibration control in box-type structures is examined by inclusion of piezo-electric smart structural elements. The box is modeled as a system of joined plates in which both extensional and bending deflections are incorporated. By collocating the sensor and actuator elements, the input–output property of passivity is achieved independent of the number of modeled modes and details such as frequencies and mode shapes. Robust vibration control is achieved by designing a strictly positive real dynamic compensator for the system.
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