Abstract
The FADEC (full authority digital electronic engine control) technology in Japan has matured substantially within the TRDI's JEC-series FADEC R&D programs. The aspects of engineering practice described in this paper have been addressed by the Third Research Center, TRDI (Technical Research and Development Institute), in the R&D process of the JEC-series aircraft engine control systems. It is shown that the analysis of rotor speed fuel control systems as non-linear servomechanisms has contributed the improvement of control performance, and that the incorporation of the derivative term within the afterburner control loop has decreased the interaction between the low-pressure rotor speed and the exhaust gas temperature. Furthermore, current important topics are described, that are absorbing the group's research effort, in accordance with the TRDI's objectives.
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