Armrest-Integrated Collective Handle for Precise Helicopter Pitch Control
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Solution Overview
Problem
Existing collective control systems in helicopters, particularly in smaller aircraft, are ergonomically inefficient and limit the precision of pitch control due to mechanical linkages and lever-based mechanisms, which can be cumbersome and restrictive in tight space constraints.
Innovation Solution
A collective control arrangement featuring a slidable collective handle within an elongate channel integrated into the pilot's armrest, allowing for ergonomic control and precise adjustment of rotor blade pitch, with optional configurations for dual-pilot setups and single-pilot operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional lever-based collective handle is used, then the control mechanism is mechanically simple, but the ergonomic comfort and precision of pitch control are reduced
Solution Approach 1:
The collective handle is repositioned from a traditional vertical lever configuration to a horizontal configuration within the armrest. This dimensional change allows the pilot to operate the collective with a more natural arm position, improving ergonomics while the channel guides the motion to maintain mechanical efficiency
Solution Approach 2:
The elongate channel acts as an intermediary constraint that guides the collective handle's motion. It provides precise directional guidance while allowing smooth movement, bridging the gap between the pilot's ergonomic needs and the mechanical requirements of the control system
2Measurement precision
If mechanical linkages are used to transmit collective handle movement, then the system is mechanically direct, but the precision of pitch control is limited
Solution Approach 1:
The patent replaces traditional mechanical linkages with an electronic signalling system. Sensors detect the position and movement of the collective handle within the channel, and electronic signals transmit this data to the flight control system, enabling more precise pitch control while reducing mechanical complexity
Solution Approach 2:
The system creates an electronic copy of the collective handle's physical position and movement characteristics. This electronic representation allows for precise measurement and control without the limitations of direct mechanical transmission
3Adaptability or versatility
If the collective handle is positioned traditionally to the left of the pilot's seat, then the control layout is conventional, but spatial constraints in small aircraft are exacerbated
Solution Approach 1:
The collective handle is merged with the armrest structure, combining two previously separate control elements into one integrated component. This consolidation eliminates the need for additional space to the left of the pilot's seat, making the control system adaptable to tight cockpit spaces in small aircraft
Data Source
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AI summary
Disclosed is a collective control arrangement for a helicopter having a plurality of rotor blades, the collective control arrangement comprising: an armrest for a pilot's seat, the armrest comprising an elongate channel; and a collective handle comprising: a first end slidably disposed in the elongate channel for coupling to one or more helicopter actuators that control collective pitch of the plurality of rotor blades; and a second end for gripping by a pilot. Advantageously the armrest comprises an elbow support portion configured to be located backwards of the hollow when the armrest is installed in the helicopter.