E. Flint et al., ELECTROMECHANICAL ANALYSIS OF PIEZOELECTRIC STACK ACTIVE MEMBER POWER-CONSUMPTION, Journal of intelligent material systems and structures, 6(1), 1995, pp. 117-124
In this paper, the coupled electromechanical behavior of piezoelectric
(PZT) stack active members has been studied to determine power consum
ption characteristics. The electromechanical admittance of a PZT stack
active member has been derived and shown to be dependent on it's stru
ctural dynamics as well as on the dynamic characteristics of the host
structure, which may be represented as a driving point structural impe
dance. The derivation of the coupled electromechanical admittance of t
he device includes detailed modeling of the influences of the actuator
housing, fixture, and hose structure. These theoretical predictions w
ere tested experimentally and good correlation was found. Additionally
, a simple numerical case study was performed to demonstrate the utili
ty of the analysis technique presented in this paper by determining th
e power consumption of a mechanical system (modeled as a single-degree
-of-freedom spring-mass-damper system) driven by the PZT stack active
member. The analysis approach presented in this paper is important for
the design of active control systems, in particular for the design of
energy efficient active control systems for space structures.