Damping control of 'smart' piezoelectric shell structures
Abstract
Advanced 'smart' structures with self-sensation and control capabilities have attracted much attention in recent years. 'Smart' piezoelectric structures (conventional structures integrated with piezoelectric sensor and actuator elements) possessing self-monitoring and adaptive static and/or dynamic characteristics are very promising in many applications. This paper presents a study on 'smart' piezoelectric shell structures. A generic piezoelastic vibration theory for a thin piezoelectric shell continuum made of a hexagonal piezoelectric material is first derived. Piezoelastic system equation and electrostatic charge equation are formulated using Hamilton's principle and Kirchhoff-Love thin shell assumptions. Dynamic adaptivity, damping control, of a simply supported cylindrical shell structure is demonstrated in a case study. It shows that the system damping increases with the increase of feedback voltage for odd modes. The control scheme is ineffective for all even modes because of the symmetrical boundary conditions.
- Publication:
-
Structural Dynamics: Recent Advances
- Pub Date:
- 1991
- Bibcode:
- 1991sdra.proc..659T
- Keywords:
-
- Cylindrical Shells;
- Piezoelectric Transducers;
- Resonant Frequencies;
- Smart Structures;
- Structural Vibration;
- Vibration Damping;
- Boundary Conditions;
- Dynamic Characteristics;
- Static Characteristics;
- Systems Integration;
- Structural Mechanics