The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 1997
Filed:
Aug. 31, 1995
Robert D Corsaro, Waldorf, MD (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
The present invention is a controllable surface based upon a 1:3 piezoeleic composite (sometimes referred to as a 1-3 composite or a 1/3 composite). The 1:3 piezoelectric composite has a first planar electrode plate, a first plurality of piezoelectric rods fixed to and extending normally from the first planar electrode plate, a second plurality of piezoelectric rods fixed to and extending normally from the first planar electrode plate, and a second planar electrode plate, coupled to the first plurality of piezoelectric rods and decoupled from the second plurality of piezoelectric rods, essentially parallel to and opposing the first planar electrode plate. The first plurality of piezoelectric rods act as actuators, and urge the first planar electrode plate in a direction normal to said plate in response to an actuator signal (applied as a bias between the two planar electrode plates). The second plurality of piezoelectric rods act as accelerometers, and generate an accelerometer signal in response to an accelerating force acting upon the first planar electrode plate. The controllable surface also includes an accelerometer mass, fixed to the second plurality of piezoelectric rods, for providing inertial mass to the second plurality of piezoelectric rods.