NASA SBIR 00-1 SOLICITATION

FORM 9B - PROJECT SUMMARY


PROPOSAL NUMBER 00-1 14.04-8309 (Chron: 001692 )
PROJECT TITLE
Adaptive structural control for space systems



TECHNICAL ABSTRACT (LIMIT 200 WORDS)
Vibration reduction will be an important contributor to the success of future earth observing platforms. Unwanted motion in the micrometer to nanometer range must be prevented from interfering with components requiring precise alignment and pointing such as telescopes and interferometers. Active structural control employing smart materials is an ideal technology for accomplishing this goal, however, development is required to produce the algorithms which can maximize the performance of these systems. The control system must be capable of tuning itself to maximize performance in the presence of uncertain dynamics.

Herein, ACX proposes to develop an adaptive control system for the robust piezoceramic structural control problem. The proposed system will have several major components, each of which takes advantage of the unique characteristics of systems using piezoceramic actuators for structural control. The control system will consist of several software modules. A system ID module will be used to obtain initial models of the spacecraft dynamics subsequent to major configuration changes. Several different adaptive control schemes including adaptive feedback, adaptive feed-forward and auto-tuning techniques will be included for implementing control laws. A supervisory system will monitor overall performance and the disturbance environment and will switch between control architectures when appropriate.



POTENTIAL COMMERCIAL APPLICATIONS
Structural control utilizing piezoceramic actuators has been demonstrated in a number of applications including automotive, robotics, and manufacturing equipment. All of these applications can benefit from the proposed adaptive control system.programming controllers in production.



NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR (Name, Organization Name, Mail Address, City/State/Zip)
Robert Jacques, Ph. D.
Active Control eXperts, Inc.
215 First St.
Cambridge , MA   02142 - 1227



NAME AND ADDRESS OF OFFEROR (Firm Name, Mail Address, City/State/Zip)
Active Control eXperts, Inc.
215 First St.
Cambridge , MA   02142 - 1227