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Adaptive structural control for space systems

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2001 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Active Control eXperts, Inc.
215 First Street Cambridge, MA 02142 0122
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2001
Title: Adaptive structural control for space systems
Agency: NASA
Contract: N/A
Award Amount: $69,772.00


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.

Principal Investigator:

Robert 1. Jacques, PhD
Chief Engineer

Business Contact:

Kenneth B. Lazarus
President & CEO
Small Business Information at Submission:

Active Control eXperts, Inc.
215 First St. Cambridge, MA 02142

Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No