Automatic throttle control for business and commuter aircraft

Development and Validation of Automatic Thrust Control System

“…Gulfstream IV와 같은 대부분의 민간 항공기에서는 추 력제어컴퓨터(throttle control computer)를 설계하여 자동으로 추력명령을 생성하여 FADEC (Full Authority Digital Engine Control)에 제공함으로써 항공기의 속도(airspeed)를 유지하 고, 자동비행시스템과 연계하여 이륙(take-off), 상승(climb), 순항(cruise), 하강(descent) 및 착륙(landing)과 같이 전 과정 의 비행임무를 자동화하고 있다 [4]. 그리고 F-18E/F와 같은 군용전투기는 UA (Up and Away) 모드에서는 순항모드 (cruise mode)를 설계하여 속도를 유지하고, PA (Power Approach) 모드에서는 착륙접근모드(approach mode)를 설계 하여 받음각(AoA: Angle of Attack)을 유지하게 함으로써 함상착륙(carrier based landing) 시에 조종사의 조종부담을 경감시킴으로 항공기의 안전성을 향상시키고 있다 [5].…”

Using an autothrottle to compare techniques for saving fuel on a regional jet aircraft

“…An autothrottle is a feature that may be included in an Automatic Flight Control System (AFCS) of an airplane. According to Bader, "the purpose of the Autothrottle is to enhance the ease, economy, and safety of flight operations" [8]. The autothrottle is designed to control the throttle position from takeoff through landing to reduce pilot workload.…”

“…Business jet autothrottle application design goals were established to maximize passenger comfort and minimize unneeded response to temporary environmental variations [8]. Table 1.1 below, is a description of autothrottle and the interaction with the other AFCS functions for each phase of flight [8]. Changes to this policy could improve fuel efficiency.…”

“…The feedback of the airspeed includes another lag to model the filtering present inside the air data sensor [29]. In [8] an EPR rate command is computed [8]. The EPR command is adjusted for changes in drag and flight path angle.…”

“…The EPR command is adjusted for changes in drag and flight path angle. After the adjustments are made, the EPR command is bounded by the engine limits [8]. From this EPR command a proportional throttle command is calculated.…”