Electromechanical analysis of piezoelectric stack active member power consumption

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:395183

Flint, E; Liang, C; Rogers, C A ^[1]

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1. Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)

In this paper, the coupled electromechanical behavior of piezoelectric (PZT) stack active members has been studied to determine power consumption characteristics. The electromechanical admittance of a PZT stack active member has been derived and shown to be dependent on its structural dynamics as well as on the dynamic characteristics of the host structure, which may be represented as a driving point structural impedance. The derivation of the coupled electromechanical admittance of the device includes detailed modeling of the influences of the actuator housing, fixture, and host structure. These theoretical predictions were tested experimentally and good correlation was found. Additionally, a simple numerical case study was conducted to demonstrate the utility of the analysis technique presented in this paper by determining the 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.

• OSTI ID: 395183
• Report Number(s): CONF-940691--; ISBN 1-56676-171-9
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ACTUATORS
CONTROL
ELECTRIC POWER
ENERGY CONSUMPTION
EXPERIMENTAL DATA
IMPEDANCE
MECHANICAL STRUCTURES
MECHANICAL VIBRATIONS
NUMERICAL ANALYSIS
POWER SUPPLIES
SHOCK ABSORBERS
THEORETICAL DATA