Electromechanical impedance modeling of active material systems

摘要

An active material system may be generalized as an electro-mechanical network because of the incorporation of the actuators (electrically driven) and sensors (that convert mechanical energy into electrical energy). This paper summarizes most of our research in the area of the electro- mechanical impedance (EMI) modeling of active material systems. In this paper, a generic electro-mechanical impedance model to describe the electro-mechanical network behavior (time domain and frequency domain) of active material systems is discussed. The focus of the discussion is on the methodology and basic components of the EMI modeling technique and its application to assist in the design of efficient active control structures. This paper first introduces the basic concept of the electro-mechanical impedance modeling and its general utilities in the area of active material systems. The methodology of the EMI modeling technique is illustrated using an example of PZT actuator-driven mechanical systems. The basic components in the EMI modeling are discussed. Finally, some applications of the EMI modeling approach are presented.