Distributed piezoelectric sensor/actuator design for dynamic measurement/control of distributed parameter systems: A piezoelectric finite element approach

• Published in: Journal of sound and vibration 1990-04, Vol.138 (1), p.17-34
• Main Authors: Tzou, H.S., Tseng, C.I.
• Format: Article
• Language: English
• Subjects: Applied sciences; Exact sciences and technology; Mechanical engineering. Machine design
• ISSN: 0022-460X; 1095-8568
• DOI: 10.1016/0022-460X(90)90701-Z

Advanced structures with integrated self-monitoring and control capabilities are becoming very important due to the rapid development of “intelligent” mechanical systems and space structures. Since the structures are distributed and flexible in nature, distributed dynamic measurement and active vibration suppression are of importance to their performance. In this paper, a new structure (shell or plate) containing an integrated distributed piezoelectric sensor and actuator is proposed. The distributed piezoelectric sensing layer monitors the structural oscillation due to the direct piezoelectric effect and the distributed actuator layer suppresses the oscillation via the converse piezoelectric effect. For modeling flexibility and versatility, a new piezoelectric finite element with internal degrees of freedom is derived. The performance of a plate model with distributed piezoelectric sensor/actuator is evaluated. Applications to distributed dynamic measurement and control of the advanced structures are also demonstrated.