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Adaptive Multi-Layer LMS Controller Design and Application to Active Vibration Suppression on a Truss and Proposed Impact Analysis TechniqueThis research develops an adaptive controller that actively suppresses a single frequency disturbance source at a remote position and tests the system on the NPS Space Truss. The experimental results are then compared to those predicted by an ANSYS finite element model. The NPS space truss is a 3.7-meter long truss that simulates a space-borne appendage with sensitive equipment mounted at its extremities. One of two installed piezoelectric actuators and an Adaptive Multi-Layer LMS control law were used to effectively eliminate an axial component of the vibrations induced by a linear proof mass actuator mounted at one end of the truss. Experimental and analytical results both demonstrate reductions to the level of system noise. Vibration reductions in excess of 50dB were obtained through experimentation and over 100dB using ANSYS, demonstrating the ability to model this system with a finite element model. This report also proposes a method to use distributed quartz accelerometers to evaluate the location, direction, and energy of impacts on the NPS space truss using the dSPACE data acquisition and processing system to capture the structural response and compare it to known reference Signals.
Document ID
20010070080
Acquisition Source
Armstrong Flight Research Center
Document Type
Other
Authors
Barney, Timothy A.
Shin, Y. S.
Agrawal, B. N.
Date Acquired
September 7, 2013
Publication Date
June 1, 2001
Subject Category
Structural Mechanics
Report/Patent Number
AD-A390082
NPS-ME-01-002
Funding Number(s)
CONTRACT_GRANT: NGT4-52422
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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