POWER EFFICIENCY OF ACTIVE STRUCTURAL-ACOUSTIC CONTROL SYSTEMS
Sponsor: National Science Foundation
Duration: 8/1/97-7/31/01
Page Last Updated: 1/6/01
Objective:
Power flow models for active structural-acoustic control systems are investigated. The performance limitations of active noise and vibration control systems will be studied with convex optimization techniques. Transducer selection and placement will be studied in relation to the design parameters such as minimal weight and maximum power efficiency. Applications include the design of weight-efficient and cost-efficient active systems for controlling sound radiation and sound transmission in structures.
Results:
- An eigenanalysis technique for analyzing structural-acoustic power efficiency was developed.
- The efficiency of point force and in-plane actuators was compared.
- A technique for optimizing the strain energy of active-passive control systems was developed.
- Experimental results on stiffened and unstiffened plates were correlated with analytical models.
Relevant Publications:
Journal Publications
- Newbury, K.*, Leo, D.J., 2001, "Structural dynamics of grid stiffened plates incorporating piezoceramic sensors and actuators", to appear in the AIAA Journal.
- Leo, D.J., Austin, E., and Beattie, C., 2001, "Constrained substructure approach to optimal strain energy analysis," to appear in the ASME Journal of Vibration and Acoustics.
- Leo, D.J., 2000, "Energy analysis of piezoelectric-actuated structures driven by linear amplifiers," Journal of Intelligent Material Systems and Structures, vol. 10, no. 1, pp. 36-45.
- Leo, D.J., 1999, "Maximizing the power output of air-acoustic actuator arrays," Journal of Intelligent Material Systems and Structure," vol. 9, no. 7, pp. 534-545.
Conference Publications
- Newbury, K., Leo, D.J., 2000, "Structural dynamics of grid stiffened plates incorporating piezoceramic sensors and actuators", AIAA Paper Number 2000-1496.
- Leo, D.J., 1999, "Energy analysis of piezoelectric-actuated structures driven by linear amplifiers," Proceedings of the Adaptive Structures and Materials Symposium, ASME AD-vol. 59, November, Nashville, TN, pp. 1-10.
- Cao, R., Leo, D.J., 1999, "A matrix method for analyzing structural-acoustic power efficiency," Proceedings of SPIE, vol. 3667, pp. 512-523.
- Cao, R., Leo, D.J., 1998, "An eigenvalue technique for analyzing structural-acoustic power efficiency," Proceedings of the Fifth Annual Symposium on Smart Structures and Materials, SPIE vol. 3329, pp. 522-533.
- Leo, D.J., Paine, J.S.N., 1997, "Comparison of distributed and point actuators for the active control of sound radiation from structures," Proceedings of the Fourth Annual Symposium on Smart Structures and Materials, SPIE vol. 3041, pp. 819-828.