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COBEM 2021
26th International Congress of Mechanical Engineering
A Historical Review of Pilot Induced Oscillations (PIO) Occurence
Submission Author:
Jorge H Bidinotto , SP
Co-Authors:
Jorge H Bidinotto, Saulo da Paz Almeida
Presenter: Jorge H Bidinotto
doi://10.26678/ABCM.COBEM2021.COB2021-0307
Abstract
The increase in technology applied to aircraft control systems has enabled aviation to increasingly adopt the use of automatic flight controls, which means a leap in development, safety, and comfort in aircraft. However, it does not free this segment from old problems like the PIO (Pilot Induced Oscillation), present in the aeronautical environment since the first flights and object of research for some decades. This phenomenon is still far from being solved, since the occurrence of recent accidents with loss of aircraft and lives, being one of the obstacles to the development of new flight control tools and automatic flight control systems. A consistent investigation of this problem and its contributing factors could allow the development of new and safer systems. This work performed a thorough investigation of the bibliography on this subject, in order to build a historical panorama of occurrences of the phenomenon, investigating causes, types of occurrence, flight phase, among other parameters, to isolate patterns and trends in the occurrence for PIO, to map the main relevant ones to be attacked in the development of the future design of flight controls actuation. Due to the robustness of available data, and in order to have a valid sample, all accidents and incidents that occurred in the USA from 1986 to 2013 were mapped, isolating those with any relationship with the PIO phenomenon, in a total of 38 events. Thus, a more pronounced trend was found to occur in small aircraft, with propeller engines, and in the landing flight phase. In this way, the authors hope to demonstrate which factors can increase the proneness for PIO occurrence, contributing as a starting point in future developments, collaborating with aviation safety.
Keywords
Pilot Induced Oscillations, Historical Review, flight-safety
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