ASPECTS OF AIRCRAFT ENGINE CONTROL-SYSTEMS RESEARCH-AND-DEVELOPMENT

The FADEC (full authority digital electronic engine control) technolog y in Japan has matured substantially within the TRDI's JEC-series FADE C R&D programs. The aspects of engineering practice described in this paper have been addressed by the Third Research Center, TRDI (Technica l Research and Development Institute), in the R&D process of the JEC-s eries aircraft engine control systems. It is shown that the analysis o f rotor speed fuel control systems as non-linear servomechanisms has c ontributed the improvement of control performance, and that the incorp oration of the derivative term within the afterburner control loop has decreased the interaction between the low-pressure rotor speed and th e exhaust gas temperature. Furthermore, current important topics are d escribed, that are absorbing the group's research effort, in accordanc e with the TRDI's objectives. Copyright (C) 1997 Elsevier Science Ltd.