Open AccessA KINEMATIC APPROACH TO SEGMENTED-TRAJECTORY GENERATION FOR THE TOTAL LOSS OF THRUST EMERGENCY
Author(s) -
Kivanc A Avrenli,
B J Dempsey
Publication year - 2015
Publication title -
aviation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.239
H-Index - 13
eISSN - 1822-4180
pISSN - 1648-7788
DOI - 10.3846/16487788.2015.1104847
Subject(s) - kinematics , thrust , aerodynamics , trajectory , trajectory optimization , aerospace engineering , computer science , redundancy (engineering) , engineering , simulation , control theory (sociology) , artificial intelligence , physics , classical mechanics , astronomy , control (management) , operating system
Contemporary twin-engine airliners are more vulnerable to total loss of thrust than yesterday‘s three and four engine airliners, due to reduced engine redundancy. In the event of a total loss of thrust, flight crews have only one chance for landing, because the aircraft cannot gain altitude. Therefore, there is a pressing need to explore the idea of an engines-out landing trajectory optimization for commercial jets. A few past studies addressed this safety issue for general aviation aircraft and fighter jets but not commercial jets, primarily because the essential aircraft-specific aerodynamic data are not publicly available. To fill in this gap, this study adopts a kinematic approach to aircraft trajectory optimization. Unlike conventional trajectory optimization methods, the kinematic algorithm requires minimal amount of aircraft-specific aerodynamic data that can be effortlessly collected in a full flight simulator. The paper describes the kinematic algorithm and applies it to a realistic bird strike scenario. Flight simulation tests are conducted in a full flight simulator to verify the accuracy of the algorithm. The results demonstrate that the algorithm can compute the optimum trajectory with a less than 3.0 percent error. Since the algorithm is accurate and computationally-undemanding, it is promising for real-world applications.