Publication:
Adaptive Multi-Layer LMS Controller Design and Application to Active Vibration Suppression on a Truss and Proposed Impact Analysis Technique

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Authors
Barney, Timothy A.
Shin, Y.S.
Agrawal, B.N.
Subjects
Active Vibration Suppression
Piezoceramic Actuators
Impact Analysis
Adaptive Controller
LMS
Advisors
Date of Issue
2001-06
Date
June 2001
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
This 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 dSP ACE data acquisition and processing system to capture the structural response and compare it to known reference signals.
Type
Technical Report
Description
Submitted to NASA as the GSRP Final Administrative Report
Series/Report No
Department
Identifiers
NPS Report Number
NPS-ME-OI-002
Sponsors
Prepared for: NASA, Dryden Flight Research Center Graduate Student Researchers Program.
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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