ENGINE FAILURE COMPENSATION USING CONTROL ALLOCATION FOR AIRCRAFT WITH DISTRIBUTED ELECTRIC PROPULSION

• Main Author: David I. S., Justin
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/69006
• Institution: Institut Teknologi Bandung

The current development in electric aircraft to achieve a greener and cleaner aviation sector has opened many technology advancements. One of the attractive technology is the Distributed Electric Propulsion (DEP) which distributes many motor arrays on the wing leading edge. One of the major issue encountered by multi engine aircraft is engine failure case. With this challenge, for aircraft with DEP, compensating and re-distributing the thrust command accordingly and simultaneously, so the yawing moment is in balance to fly symmetrically, become a concern. Such that not only the aircraft can fly in symmetric fashion, but the automatic controller for speed and altitude can also be operated normally. The goals of this undergraduate thesis are to distribute thrust command on the DEP aircraft and evaluate the controller performance, especially when an engine failure(s) exists in a numerical longitudinal flight simulation. The proposed method for thrust command management is using the control allocation method based on linear programming (LP) and quadratic programming (QP). To perform speed and altitude tracking, a speed hold controller and altitude hold controller are developed using a PID controller. The numerical flight simulation is built based on ATR72-200 longitudinal model using Simulink. The thrust management and engine failure compensation are successfully conducted using LP and QP-based control allocation. Both LP and QP can achieve the scenarios’ goal and compensate the engine failure effectively based on the numerical simulation results while maintaining zero engine yawing moment. The QP-based CA tends to use more balanced effectors, which may be desirable for DEP aircraft. LP tends to use minimal actuators to the fullest first (one by one). When engine failure(s) exists, some tracking performance is degraded due to lower attainable thrust, contributed by failed engine and control allocation limiting action to maintain zero engine yawing moment.