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Fly-By-Wire Dual-Dual Flight Control Actuation System
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English
Abstract
This paper presents the basic principle of force synchronization for the active-active (two actuators actuate on the same surface simultaneously) dual actuation system. A novel approach that solves the force fight between the two actuators for the system is also presented. This is accomplished by utilizing an electronic auto-rigging and a pressure flow control valve. The simple system architecture utilizing fewer components make it possible to achieve the goals of low cost, low weight and higher reliability. The low weight and low cost are essential requirements for the smaller commercial aircraft. This dual-dual (two actuators and two control units) system has been developed by Dowty Aerospace Los Angeles and Saab AB jointly. The system is currently implemented on the SAAB-2000 Turboprop aircraft with five years excellent flight record.
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Citation
Ma, C., "Fly-By-Wire Dual-Dual Flight Control Actuation System," SAE Technical Paper 981252, 1998, https://doi.org/10.4271/981252.Also In
References
- Synthesized flow-control servovalve Garnjost Kennith Moog Inc. Aug. 31 1993
- Auto rigging for servo actuator system Ma Carlton Y. Hydraulic Units, Inc. (Dowty Aerospace Los Angeles.) July 14 1992