Robust control of the delayed resonator vibration absorber

1999 ◽  
Vol 7 (6) ◽  
pp. 683-691 ◽  
Author(s):  
M.E. Renzulli ◽  
R. Ghosh-Roy ◽  
N. Olgac
Keyword(s):  
Robust Control ◽  
Vibration Absorber ◽  
Resonator Vibration

The Influence Region Analysis for the Delayed Resonator Vibration Absorber

2001 ◽  
Author(s):  
Giulio Grillo ◽  
Nejat Olgac
Keyword(s):  
Vibration Suppression ◽  
Vibration Absorber ◽  
Primary System ◽  
Frequency Interval ◽  
Vibration Absorption ◽  
Region Analysis ◽  
The Common ◽  
Resonator Vibration ◽  
Three Degree Of Freedom ◽  
Tuned Vibration Absorber

Abstract This paper presents an influence region analysis for an actively tuned vibration absorber, the Delayed Resonator (DR). DR is shown to respond to tonal excitations with time varying frequencies [1–3]. The vibration suppression is most effective at the point of attachment of the absorber to the primary structure. In this study we show that proper feedback control on the absorber can yield successful vibration suppression at points away from this point of attachment. The form and the size of such “influence region” strongly depend on the structural properties of the absorber and the primary system. There are a number of questions addressed in this paper: a) Stability of vibration absorption, considering that a single absorber is used to suppress oscillations at different locations. b) Possible common operating frequency intervals in which the suppression can be switched from one point on the structure to the others. A three-degree-of-freedom system is taken for as example case. One single DR absorber is demonstrated to suppress the oscillations at one of the three masses at a given time. Instead of an “influence region” a set of “influence points” is introduced. An analysis method is presented to find the common frequency interval in which the DR absorber operates at all three influence points.

H ∞ Robust Control of Flexible Beam Vibration by Using a Hybrid Damper

1996 ◽  
Vol 118 (3) ◽  
pp. 643-648 ◽  
Author(s):  
Chong-Won Lee ◽  
Won-Ho Jee
Keyword(s):  
Robust Control ◽  
Laboratory Test ◽  
Cantilever Beam ◽  
Large Amplitude ◽  
Vibration Absorber ◽  
Flexible Beam ◽  
Test Rig ◽  
Control Scheme ◽  
Large Amplitude Vibrations ◽  
Hybrid Damper

A new hybrid damper is proposed to suppress the vibration of a flexible cantilever beam at its free end. It consists of an active piezoelectric-type servo-damper and a passive dampled vibration absorber to effectively suppress both the small and large amplitude vibrations. The H∞ control scheme is successfully applied to a laboratory test rig equipped with the hybrid damper when its overhung length is continually changed.

Robust Control of Flexible Structure Using Dynamic Vibration Absorber

2005 ◽  
Vol 29 (8) ◽  
pp. 1093-1101
Author(s):  
Sangdeok Sim ◽  
Hoshik Kang ◽  
Namheui Jong ◽  
Kangseok Jang ◽  
Doohoon Kim ◽  
...  
Keyword(s):  
Robust Control ◽  
Flexible Structure ◽  
Vibration Absorber ◽  
Dynamic Vibration Absorber ◽  
Dynamic Vibration
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