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Record Details

Record 15 of 22487
Management of analytical redundancy in digital flight control systems for aircraft
Author and Affiliation:
Montgomery, R. C.
Price, D. B.(NASA Langley Research Center, Flight Dynamics and Control Div., Hampton, Va., United States)
Abstract: This paper presents a design method for optimal redundancy management for nonlinear systems with application to highly maneuvering aircraft. The approach taken is based on selecting the failure states to be covered by the system design and constructing a cost function that represents the cost of making an incorrect decision. The decision logic which minimizes the cost requires a bank of extended Kalman filters running in parallel. This produces a severe computational requirement. To reduce this requirement, a suboptimal logic is developed based on using a nonlinear single-stage prediction algorithm in the filters with filter gains and decision logic selected using steady-state results obtained from a linearization of the vehicle and sensor dynamics. The design process is then applied to designing a redundancy management system for the F8-C aircraft. Results indicate that the system is superior in failure detection to a system using the same structure but using a linear single-stage prediction algorithm in the filters.
Publication Date: Aug 01, 1974
Document ID:
19740055499
(Acquired Dec 04, 1995)
Accession Number: 74A38249
Subject Category: AIRCRAFT
Report/Patent Number: AIAA PAPER 74-887
Document Type: Conference Paper
Publisher Information: United States
Meeting Information: Mechanics and Control of Flight Conference; Aug. 5-9, 1974; Anaheim, CA
Meeting Sponsor: American Institute of Aeronautics and Astronautics
Financial Sponsor: NASA; United States
Description: 11p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: AIRCRAFT CONTROL; DIGITAL SYSTEMS; FLIGHT CONTROL; NONLINEAR SYSTEMS; OPTIMAL CONTROL; REDUNDANCY; COST REDUCTION; DECISION THEORY; FAILURE MODES; FIGHTER AIRCRAFT; FLIGHT SIMULATION; KALMAN FILTERS; MANAGEMENT METHODS
Imprint And Other Notes: American Institute of Aeronautics and Astronautics, Mechanics and Control of Flight Conference, Anaheim, Calif., Aug. 5-9, 1974, 11 p.
Availability Source: Other Sources
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