ROBUST, GAIN-SCHEDULED AUTOPILOTS FOR MISSILES

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N/A
Agency Tracking Number: 15487
Amount: $47,839.00
Phase: Phase I
Program: SBIR
Awards Year: 1991
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
1009 Fifth St Se, Minneapolis, MN, 55414
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Gary J Balas
 Principal Investigator
 (612) 378-1742
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THE FUNCTION OF MISSILE AUTOPILOTS IS TO MAINTAIN STABILITY OF THE AIRFRAME OVER THE PERFORMANCE ENVELOPE, PROVIDE ADEQUATE AIRFRAME RESPONSE FOR THE GUIDANCE SYSTEM AND REDUCE SENSITIVITY OF GUIDANCE PERFORMANCE TO VEHICLE PARAMETER VARIATIONS AND DISTURBANCES. THE AUTOPILOTS MUST BE ROBUST TO PREDICTABLE VARIATIONS IN PLANT PARAMETERS ABOUT SOME OPERATING POINT AS WELL AS ACTUAL UNCERTAINTY (WHICH MAY BE SMALLER THAN THE PREDICTED PARAMETER VARIATIONS) IN THE AIRFRAME CONTROL DESIGN MODEL. THESE PROBLEMS ARE APPROACHED FROM TWO DIRECTIONS INTHIS PROPOSAL. THE FIRST INVOLVES THE APPLICATION OF U-SYNTHESIS TECHNIQUES TO DESIGN SEVERAL AUTOPILOTS FOR A GIVEN FLIGHT ENVELOPE. THESE DESIGNS WILL EMPHASIZE ROBUSTNESS TO PARAMETERS THAT VARY AS A FUNCTION OF TIME AND MODELLING UNCERTAINTIES IN THE CONTROL DESIGN MODEL. THE SECOND DIRECTION OF THE RESEARCH IS TO DIRECTLY DESIGN FOR A SINGLE AUTOPILOT FRAMEWORK WHICH SCHEDULES AS A. FUNCTION OF SEVERAL VARIABLES. THREE NOVEL APPROACHES TO GAIN-SCHEDULING ARE PROPOSED FOR DESIGN. THESE ARE: ROBUST, GAIN-SCHEDULED, STATE-FEEDBACK WITH QUADRATIC STABILITY; STATE-SPACE U UPPER BOUND USING OBSERVERS AND STATE FEEDBACK; AND D - K ITERATION WITH A GAIN SCHEDULED STRUCTURE. THE GOAL IS TO DESIGN MORE ROBUST, BETTER PERFORMING FOR THE ENTIRE FLIGHTENVELOPE.

* Information listed above is at the time of submission. *

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