Interface for vibration reduction in structural-dynamic systems

US5765817A · kind A · utility

Assignee

• Deutsche Forschungsanstalt Fur Luft-Und Raumfahrt E.V. · DE

Inventor

• Elmar Breitbach · Oebisfelde, DE

Key dates

• Filing date: Jul 25, 1996
• Grant date: Jun 16, 1998
• Expiry date: Jul 25, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F15/005
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An interface (3) for vibration reduction in structural-dynamic systems comprises a base-side construction element (8) and a structure-side construction element (9) and at least one actuator (14), for example a piezoelectric or a magnetostrictive actuator. The actuator (14) has a main direction (17), and the extension of the actuator (14) in its main direction (17) between a first engagement point (15) on the base-side construction element (8) and a second engagement point (16) on the structure-side construction element (9) can be voluntarily changed by means of a drive signal. Therein, the actuator (14) is under pressure prestress between the first engagement point (15) and the second engagement point (16), and at least one elastic element (18) is arranged in parallel to the actuator (14) between the base-side construction element (8) and the structure-side construction element (9), the elastic element (18) having a longitudinal stiffness parallel to the main direction (17) of the actuator (14) which is as low as possible, and a transversal stiffness perpendicular to the main direction (17) of the actuator (14) which is as high as possible.