Tail Rotor Actuator Margin Awareness System
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Solution Overview
Problem
As rotorcraft become larger and more complex, managing flight parameters and controls becomes increasingly challenging due to tightly coupled aerodynamic characteristics, leading to differences in flight characteristics across various speed regimes, which existing fly-by-wire systems struggle to address effectively, particularly in maintaining stable flight and reducing pilot workload.
Innovation Solution
A system and method for tail rotor margin awareness that includes a tail rotor actuator, pilot flight controls, and a flight control computer, which determines the current extension of the tail rotor actuator and provides warnings to the pilot through visual, audio, or haptic cues when the actuator approaches its maximum extension, allowing for intuitive and stable flight control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the tail rotor actuator extension is increased to counter torque in larger rotorcraft, then the anti-torque capability is improved, but the risk of actuator overload and flight control instability increases
Solution Approach 1:
The flight control computer continuously monitors the actual extension of the tail rotor actuator and compares it to the commanded extension. When the actual extension deviates from the commanded extension beyond a threshold, the system generates warnings to alert the pilot, enabling real-time feedback control to prevent actuator overload and maintain flight stability.
Solution Approach 2:
The system performs preliminary monitoring and comparison of actuator extension parameters before critical overload conditions occur. By continuously tracking the relationship between commanded and actual extension and providing advance warnings, the system enables preventive action to avoid actuator failure and maintain flight control reliability.
2Ease of operation
If fly-by-wire systems are used to automate flight control, then pilot workload is reduced, but the complexity of managing flight parameters increases
Solution Approach 1:
The flight control computer automatically performs the complex task of monitoring and comparing commanded versus actual actuator extension, eliminating the need for the pilot to manually track and manage these parameters. The system self-monitors and provides simplified warning indications, reducing pilot workload while managing the complexity of flight parameter control.
Solution Approach 2:
The flight control computer acts as an intermediary between the pilot's flight controls and the tail rotor actuator. It automatically handles the complex monitoring and comparison functions, translating complex parameter management into simple pilot actions while providing clear warning indications when issues arise.
Data Source
AI summary
In an embodiment, a rotorcraft includes: tail rotor blades; a tail rotor actuator coupled to the tail rotor blades such that the pitch of the tail rotor blades varies according to a current extension of the tail rotor actuator; pilot flight controls electrically coupled to the tail rotor actuator; and a flight control computer electrically coupled to the tail rotor actuator and the pilot flight controls, the flight control computer configured to: determine the current extension of the tail rotor actuator; determine whether the current extension of the tail rotor actuator is within a margin of a maximum extension of the tail rotor actuator; and indicate a first warning to a pilot in response to the current extension of the tail rotor actuator being within the margin of the maximum extension of the tail rotor actuator.