Abstract
This paper presents a theory for rule-based fault-tolerant flight control. The objective is to define methods for designing control systems capable of accommodating a wide range of aircraft failures, including sensor, control, and structural failures. A software architecture is described that integrates quantitative analytical redundancy techniques and heuristic expert system concepts for the purpose of in-flight, real-time fault tolerance. The resultant controller uses a rule-based expert system approach to transform the problem of failure accommodation task scheduling and selection into a problem of search. Control system performance under sensor and control failures is demonstrated using linear discrete-time deterministic simulations of a tandem-rotor helicopters dynamics. It is found that the rule-based control theory can be used to enhance existing redundancy management systems. This approach to control system design also provides inherent parallelism for computational speed, smooth integration of algorithmic and heuristic computation, a search-based decisionmaking mechanism, straightforward system organization and debugging, and an incremental growth capability.
Original language | English (US) |
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State | Published - 1986 |
Event | Astrodynamics Conference, 1986 - Williamsburg, United States Duration: Aug 18 1986 → Aug 20 1986 |
Other
Other | Astrodynamics Conference, 1986 |
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Country/Territory | United States |
City | Williamsburg |
Period | 8/18/86 → 8/20/86 |
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics