Energy-Based Vibration Control System for Load-Bearing Skin Structures

Period of Performance: 05/13/1999 - 11/12/1999

$65K

Phase 1 SBIR

Recipient Firm

Qrdc, Inc.
Box 562
Excelsior, MN 55331
Principal Investigator

Abstract

The goal of this SBIR project is to develop smart load-bearing skin structures with embedded energy-based hybrid vibration control systems. The proposed vibration control strategy relies on the vibrational energy management concept. The vibration control system will be comprised of both passive and active elements which each will have two functions. The passive elements will be utilized for energy dissipation at high frequencies and energy absorption at resonance frequencies of the skin structure. Constrained layer damping and tunned-mass dampers will be the initial candidates for passive elements during the feasibility study. The active elements will dissipate energy at low frequencies and steer vibrational energy to specified regions at which excess energy can be most effectively absorbed or dissipated by passive or active elements. PZT-based actuators will be the initial candidates for active elements. The proposed smart skin structures will have the capability of steering their excited vibration energy in the most efficient and effective manner in order to minimize the damaging efforts and/or radiated noise of propagating vibrations. In Phase I, the feasibility of the proposed smart load-bearing skin structure will be demonstrated on a flat panel. A computer model will be used to show that is possible to construct a panel with embedded vibrational energy steering capability which is the novel part of our work.