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System and method for detecting an uncommanded or uncontrollable high thrust event in an aircraft

A high-thrust technology for aircraft, applied in the direction of turbine/propulsion fuel delivery system, charging system, fuel control of turbine/propulsion device, etc., which can solve problems such as departure from the runway boundary, dangerous situations, and lateral departure of the aircraft

Pending Publication Date: 2020-11-13
PRATT & WHITNEY CANADA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This can lead to dangerous situations during certain critical phases of flight
for example, during landing or takeoff, a UHT event may cause the vehicle to diverge laterally or clear the runway boundary

Method used

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  • System and method for detecting an uncommanded or uncontrollable high thrust event in an aircraft
  • System and method for detecting an uncommanded or uncontrollable high thrust event in an aircraft
  • System and method for detecting an uncommanded or uncontrollable high thrust event in an aircraft

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Embodiment Construction

[0016] This paper describes methods and systems for detection of uncommanded or uncontrollable high thrust (UHT) events. Throughout this disclosure, references to "uncommanded high thrust events" will also include "uncontrollable high thrust events" and vice versa. A UHT event is defined as a failure to respond to a low thrust command on the engine section, thus resulting in excess thrust relative to the command. Many types of failures can lead to UHT events, such as, but not limited to, runaway or stuck fuel metering valves (FMVs). In both cases, the fuel flow does not correspond to the position of the power lever or throttle.

[0017] Turboprops have thrust contributions from the engine as well as from the thrusters (depending on thruster blade position). As such, UHT detection for turboprop engines differs from UHT detection for engines without thrusters, such as turbofan engines.

[0018] Example turboprop at figure 1 in the icon. Aircraft powerplant 110 generally inc...

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Abstract

System and method for detecting an uncommanded high thrust (UHT) event in an aircraft. The method comprises enabling a UHT function associated with an engine when an enabling condition has been met. When the UHT function is enabled, the UHT event is detected when a power lever of the aircraft is at a given position, a parameter indicative of engine speed or power is above a first threshold, and arate of change of the engine speed is above a second threshold. In response to detecting the UHT event, an alert is output to trigger accommodations to the UHT event for the engine.

Description

technical field [0001] The present disclosure generally relates to detecting asymmetric thrust on a multi-engine aircraft. Background technique [0002] Failure of an aircraft engine thrust control system may result in an uncommanded or uncontrolled high thrust (UHT) event. On multi-engine aircraft, UHT events may result in asymmetric thrust provided by the engine banks. During certain critical flight phases, this could lead to a hazardous situation. For example, during landing or take-off, a UHT event may cause the aircraft to drift laterally or stray from the runway boundary. [0003] Pilot workloads are high and reactions to UHT events during critical flight phases require split-second decisions. Therefore, there is a need to provide detection and regulation of UHT along with the stated intent of the pilot to command low thrust. SUMMARY OF THE INVENTION [0004] According to broad aspects, methods are provided for detecting an uncommanded high thrust (UHT) event in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64F5/60G06F30/15
CPCB64F5/60G06F30/15F01D21/02F01D21/003F05D2220/323F05D2260/90F05D2270/051F05D2270/093F05D2270/09F05D2270/304F05D2270/309F05D2270/335F02C9/00F02C9/44F02C9/58F05D2270/021F01D21/14
Inventor J.查哈尔Z.莫尼尔法蒂C.利希奥D.麦格拉斯G.辛嘉罗
Owner PRATT & WHITNEY CANADA CORP