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Main Title: Demand control law for total energy angle tested at manual steep approaches
Author(s): Schreiter, Karolin
Müller, Simon
Luckner, Robert
Manzey, Dietrich
Type: Article
Language Code: en
Abstract: With rising demands on flight precision and more complex flight trajectories, pilots' workload during manual flight is increasing. This is especially the case for flight path and speed control with thrust and spoilers during approach and landing. The objective of the nxControl system is to enable pilots to manually control the longitudinal load factor nx instead of engine parameters and spoiler deflections. This load factor is equivalent to total energy angle. It is directly influenced by engine thrust and aerodynamic drag. The nxController shall complement the existing fly-by-wire control laws of today's commercial airliners. It aims at higher precision with lower workload during manual flight. The pilots set and monitor the controller input and impact by an adapted human-machine interface consisting of a thrust-lever-like inceptor and additional display elements to enhance energy awareness. This paper describes the nxControl system with focus on the demand control law and an evaluation study with 24 airline pilots in a research flight simulator. The task was a demanding, steep, and curved approach in the mountainous area of Salzburg airport with required navigation performance RNP 0.1. The results show that despite minimal training the pilots achieved higher precision in speed and energy control with lower physical workload with the nxControl system.
Issue Date: 2018
Date Available: 25-May-2018
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Subject(s): nxControl system
manual flight
flight control system
augmented flight control
human machine interface
total energy angle
flight simulator study
flight precision
steep RNP approach
Journal Title: Journal of Guidance, Control, and Dynamics
Publisher: American Institute of Aeronautics and Astronautics
Publisher Place: New York, NY
Volume: 41
Issue: 6
Publisher DOI: 10.2514/1.G003194
Page Start: 1443
Page End: 1448
ISSN: 0731-5090
Appears in Collections:FG Flugmechanik, Flugregelung und Aeroelastizität » Publications
FG Arbeits-, Ingenieur- und Organisationspsychologie » Publications

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