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System and method for mitigating an effect of an excitation of a structural flexible mode of an aircraft

An aircraft, flexible technology, applied in the field of aircraft, can solve problems affecting passenger comfort and aircraft control

Pending Publication Date: 2020-05-05
BOMBARDIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Harmful aircraft motion may include changes in aircraft attitude and flight path caused by the aircraft's flight control systems and may affect passenger comfort and aircraft control

Method used

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  • System and method for mitigating an effect of an excitation of a structural flexible mode of an aircraft
  • System and method for mitigating an effect of an excitation of a structural flexible mode of an aircraft
  • System and method for mitigating an effect of an excitation of a structural flexible mode of an aircraft

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Embodiment Construction

[0069] In various embodiments, the systems and methods described herein can improve performance in aircraft by mitigating the effects of excitation of one or more structural flexibility modes of the aircraft and thereby preventing accidental combined man-machine (APC) incidents under certain circumstances. Passenger comfort during the flight. It has been found that APC events can potentially develop when pilot commands excite structurally resonant flexible (eg, bending, torsion) modes of the aircraft structure (ie, fuselage). For example, a sudden back-and-forth (e.g., oscillatory) roll command at or near a certain frequency with respect to the aircraft's roll axis could potentially excite compliant modes in the aircraft's structure and cause the pilot to experience unexpected vibrations in the aircraft cockpit lateral acceleration. In this case, this unexpected lateral acceleration felt by the pilot may in turn cause the pilot to accidentally indicate another roll command in...

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PUM

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Abstract

The invention relates to system and method for mitigating an effect of an excitation of a structural flexible mode of an aircraft. Systems and methods for controlling a fixed-wing aircraft during flight are disclosed. The aircraft comprises first and second flight control surfaces of different types. The method comprises determining that a pilot command of the first flight control surface will excite a structural flexible mode of the aircraft and then executing the pilot command of the first flight control surface in conjunction with a command of the second flight control surface to mitigate the effect of the excitation of the structural flexible mode of the aircraft.

Description

technical field [0001] The present disclosure relates generally to aircraft, and more particularly to controlling an aircraft during flight. Background technique [0002] Combined human-machine (APC) incidents can result in unexpected and harmful aircraft movements resulting from abnormal interactions between the aircraft and the pilot. Unwanted aircraft motion may include changes in the aircraft attitude and flight path caused by the aircraft's flight control systems and may affect passenger comfort and aircraft control. An APC event occurs due to the interaction between the pilot and the aircraft while the pilot is attempting to control the aircraft. Since the actions of the pilot may depend on the motion of the aircraft induced by the pilot's commands, the aircraft and the pilot may form a closed-loop feedback control system. Undesired APC events may be identified as instabilities in the closed-loop feedback control system involving the pilot and the aircraft. Content...

Claims

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Application Information

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IPC IPC(8): B64C9/00B64C9/12
CPCB64C9/00B64C9/12B64C2009/005G05D1/0841B64C5/00B64C13/18B64C19/02B64C9/04B64C9/06B64C9/10B64C13/16B64C13/0421B64C13/503
Inventor 西尔万·泰赖因戴维·雷斯特
Owner BOMBARDIER CORP