Adaptive Structures and Noise Control
The mission of the Adaptive Structures and Noise Control Technical Group is to pursue strategies for reducing vibration and noise in engineering systems. This involves the development of accurate modeling approaches, passive control methods, discrete and distributed sensors and actuators as well as placement strategies, fast and stable adaptive control algorithms, and experiments to evaluate real-world performance. In complex mechanical/acoustical systems with multiple sensing and source/actuator locations, significant challenges remain.
Research Topics
- Active damping using piezoelectric and other “smart” materials
- Active mounts of for equipment and automobiles
- Active, tunable vibration absorbers
- Reduction of sound radiation with cancellation sources located in the vicinity of a primary radiator
- Determination of optimal locations of cancellation sources to achieve either global or local noise reduction in small, low modal density enclosures, such as automobiles
- Reduction of vibration and acoustic transmission from plates, elastically supported at multiple points on the foundation
- Control of structural intensity to reduce the power flow of structural vibration in beams, plates, and complex structures
- Energy harvesting from vibration and acoustic response
