Active Feedback Damper for Multiresonaut Structures.
Abstract
This thesis presents a theoretical and experimental analysis of an active feedback systems for controlling mechanical vibrations of multiresonant structures. A velocity transducer, an amplifier and a vibration generator are connected in negative feedback to generate a damping force proportional to the feedback loop gain, thus reducing resonant vibrational motion. Design of a stable system using commercially available components is carried out for the case of a 48-in. uniform beam of 1in. by 2in. section. Generality of the technique is demonstrated by also applying the design to a 21-in. diameter cylindrical shell. Maximum velocity reduction is found to be proportional to the undamped mobility of the structures and is limited by stability conditions imposed on the feedback gain. Damping of beam modes lying below 10 kc is achieved with reductions for the highest mobility resonances being 25-30db. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 12, 1963
- Accession Number
- AD0424613
Entities
People
- T. H. Rockwell
Organizations
- Pennsylvania State University