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SR-71 Digital Automatic Flight and Inlet Control System
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English
Abstract
This paper presents a description and treats the integration of a new triple channel multi-rate Digital Automatic Flight and Inlet Control System (DAFICS) into the SR-71 aircraft. Predicted airframe longevity to the year 2000 and aging automatic flight control/air inlet control analog systems dictated a modernization program to insure supportability over the life span of the aircraft. Aerodynamic consideration and development rationale is provided. A functional system description identifies the systems being replaced. Simulation, hardware/software development, redundancy management and flight experience is presented. Finally, digital and analog control comparisons are made and improvements discussed.
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Citation
DeGrey, R., Nelson, R., and Meyer, J., "SR-71 Digital Automatic Flight and Inlet Control System," SAE Technical Paper 851977, 1985, https://doi.org/10.4271/851977.Also In
References
- Brown, Stuart C. “Computer Simulation of Aircraft Motions and Propulsion System Dynamics for the YF-12A Aircraft at Supersonic Cruise Conditions” 1973
- McMaster, John R. Schenk, Frederick L. “Development of the F-12 Aircraft Flight Control System” Journal of Aircraft April 1974
- Campbell, David H. “F-12 Series Aircraft Propulsion System Performance and Development” Journal of Aircraft November 1974