WSEAS Transactions on Environment and Development
Print ISSN: 1790-5079, E-ISSN: 2224-3496
Volume 15, 2019
Preliminary Safety Assessment for the Sidestick Move from Autopilot Signals Function
Authors: ,
Abstract: The main purpose of civil aviation is economical, reliable and safe flight operations. To develop a modern aircraft, each aircraft system must contribute to efficiency, reliability and safety. One of the most important systems in an airсraft is a flight control system (fly-by-wire) and autopilot systems. A flight control system includes, among other things, pilot controls in the cockpit - yokes (Boeing) and sidesticks (Airbus, Irkut, Sukhoi). Sidesticks are currently a higher priority for the development of pilot controls in the cockpit due to increased ecomony compared to yokes. When using side sticks, a problem arose that was not found on tightly connected yokes - the lack of tactile feedback on the pilot flying actions of the pilot monitoring (with manual control of the aircraft) and the spatial position of the aircraft in both pilots (with automatic control of the aircraft). Among other things, this problem is associated with an increase in the number of hard landings. These problems affect flight safety. At the moment, the main way to solve these problems is the development and implementation of active sidesticks. Active sidesticks are not certified on any of the large civilian aircraft. The purpose of this work is to research the safety of The Sidestick Move from Autopilot Signals Function. The safety research methodology is carried out in accordance with the recommendations of SAE ARP 4761 and SAE ARP 4754A. As part of the work, a Functional Hazard Assessment, a preliminary Fault Tree Analysis and a Common Mode Analysis were performed. As a result, the required Functional Development Assurance Level and the Item Development Assurance Level (which perform this function) were determined. Quantitative requirements for the probability of failure conditions that satisfy CS-25 standards were also determined. Thus, the need for the introduction of active pilot controls in the flight control systems of perspective civilian aircraft was analyzed and the necessary measures were taken to ensure the safety of this function.
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Keywords: Active pilot controls, Safety Assessment, Functional Hazard Assessment, Automatic Flight Control System, Failure Tree Analysis, Flight Control System
Pages: 485-492
WSEAS Transactions on Environment and Development, ISSN / E-ISSN: 1790-5079 / 2224-3496, Volume 15, 2019, Art. #52