Piezoelectric fiber, active damped, composite electronic housings
US7767944B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2007 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Mar 27, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B10/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A vibration controlled housing. The novel housing includes a housing structure and a mechanism for receiving a control signal and in accordance therewith electronically tuning a structural response of the structure. In an illustrative embodiment, the housing structure includes a composite material containing a plurality of piezoelectric fibers adapted to generate an electrical signal in response to a deformation in the structure and to deform the structure in response to an electrical signal applied thereto. A control circuit receives the sensed signal from the fibers and generates an excitation signal that is applied to the fibers to increase the stiffness or compliance of the fibers at predetermined frequencies. In an illustrative embodiment, the control signal is adapted to provide low frequency stiffness and strength performance while attenuating high frequency vibrations to protect electronics housed within the structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.