Development and test evaluation of full authority digital electronic control system for auxiliary power unit based on electronic pump

Abstract

A full authority digital electronic control system (FADEC) is developed for a certain helicopter auxiliary power unit with the hydro-mechanical control system, key techniques of which such as system construction, control schedules, fuel system based on electronic pump are designed and implemented in detail. Functions and performances of the FADEC system are evaluated by ground run test, and the results show the functions of the control system are enhanced and the performances of APU are improved remarkably under the control of the resultant FADEC compared with the original hydro-mechanical control system.