On the nature of the interaction between structures and actuators in vibration suppressionThis lecture presents a summary of work on the analysis of the interaction between a structure, an actuator used to suppress the vibration of the structure, and the control law implemented by the actuator. Two control applications are considered. First, a proof-mass actuator with experimentally verified dynamics, capable of being used in a space structure configuration is examined. This is connected to a cantilevered beam modeled as a single degree of freedom system. Secondly, an electric motor, again with experimentally verified dynamics, is used to slew a beam modeled by a partial differential equation. Both the experimental and numerical configuration predict the presence of potential instabilities in system performance if proper consideration is not given to interactions between the control law, the structure and the actuator. In addition, an understanding of the interaction is shown to greatly effect performance. In particular it is shown that judicious choice of actuator parameters greatly improves closed loop performance.
Document ID
19920063266
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Inman, Daniel J. (NASA Langley Research Center Hampton, VA, United States)
Garcia, Ephrahim (NASA Langley Research Center Hampton, VA, United States)
Umland, Jeff (New York, State University Buffalo, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Structural Mechanics
Meeting Information
Meeting: International Congress on Recent Developments in Air and Structure-Borne Sound and Vibration