Multi-modal Vibration Control of Truss Structures based on the Optimal Placement of a Sensor and an Actuator

Abstract

The present paper deals with the multi-modal vibration control of truss structures based on the independent modal space control. A modal sensor for identifying specific vibration modes is constructed by one accelerometer and band-pass filters, where the sensor is optimally placed based on the minimization criterion of observation spillover due to unmeasured vibration modes. Besides, one stacked piezoelectric actuator is also optimally placed to maximize the induced modal control forces for controlled vibration modes. The proposed optimal placement method of a sensor/actuator using satisficing trade-off method is examined through the numerical examples.