Piezoelectric line moment actuator for active radiation control from light-weight structures. (November 2017)

• Record Type: Journal Article
• Authors: Jandak, Vojtech; Svec, Petr; Jiricek, Ondrej; Brothanek, Marek
• Is Part Of: Mechanical systems and signal processing. Volume 96(2017)
• Page Start: 260
• Page End: 272
• Publication Date: 2017-11
• Subjects: Acoustics -- Piezoelectricity -- Line moment actuator -- ASAC; 23-557; Structural dynamics -- Periodicals; Vibration -- Periodicals; Constructions -- Dynamique -- Périodiques; Vibration -- Périodiques; Structural dynamics; Vibration; Periodicals; 621
• DOI: 10.1016/j.ymssp.2017.04.003
• Languages: English
• ISSNs: 0888-3270

Abstract

Highlights: This paper outlines the design of a piezoelectric line moment actuator used for ASAC. The actuator is based on several couples of piezoelectric bimorphs. The dependency of the moment amplitude on the frequency and the voltage are derived. The behavior of a moment actuator for ASAC was tested on thin plate. Abstract: This article outlines the design of a piezoelectric line moment actuator used for active structural acoustic control. Actuators produce a dynamic bending moment that appears in the controlled structure resulting from the inertial forces when the attached piezoelectric stripe actuators start to oscillate. The article provides a detailed theoretical analysis necessary for the practical realization of these actuators, including considerations concerning their placement, a crucial factor in the overall system performance. Approximate formulas describing the dependency of the moment amplitude on the frequency and the required electric voltage are derived. Recommendations applicable for the system's design based on both theoretical and empirical results are provided.