Aircraft Control Lever Detent Switching for Autonomous Flight
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Solution Overview
Problem
Existing aircraft systems face challenges in seamlessly transitioning between manual and autonomous flight modes, particularly with detent systems that interfere with the free movement of control levers during autonomous operations.
Innovation Solution
A selectively engageable detent system that can be moved between engaged and disengaged configurations based on flight modes, allowing control levers to move freely during autonomous flight while maintaining functionality during manual flight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If detent systems are engaged to provide tactile response and prevent unwanted state during manual operation, then safety and precision are improved, but the control lever movement is restricted during autonomous operation
Solution Approach 1:
The detent system is designed to be dynamically switchable between engaged and disengaged states based on flight mode. During manual operation, detents are engaged to provide tactile feedback and prevent unwanted lever movement. During autonomous operation, detents are disengaged to allow free lever movement for actuation systems. This dynamic reconfiguration resolves the contradiction by adapting the system's mechanical constraints to the operational context.
Solution Approach 2:
The system changes the mechanical parameter of detent engagement/disengagement based on flight mode. The detent actuator responds to flight mode signals to modify the physical state of the detent mechanism, transitioning from a constrained state (engaged) during manual flight to an unconstrained state (disengaged) during autonomous flight, thereby resolving the contradiction between safety and ease of operation.
2Manufacturing precision
If detent systems are engaged to provide tactile response and maintain control lever at setpoint, then operational precision is improved, but automation compatibility deteriorates
Solution Approach 1:
The detent system dynamically adapts its mechanical constraints based on flight mode. During manual operation with high precision requirements, detents are engaged to maintain the lever at predetermined setpoints. During autonomous operation, detents are disengaged to allow the actuation system to move the lever freely to any position along the lever path, thereby improving automation compatibility while maintaining operational precision when needed.
Solution Approach 2:
The system modifies the mechanical parameter of detent engagement based on automation level. The detent actuator receives flight mode signals and adjusts the physical state of detents accordingly, enabling high operational precision during manual flight and full automation compatibility during autonomous flight by removing mechanical constraints that would interfere with automated lever positioning.
3Reliability
If detent systems are always engaged to prevent unwanted state, then safety is improved, but device complexity increases due to selective engagement mechanism
Solution Approach 1:
The detent actuator serves multiple functions: it engages detents during manual flight to provide safety constraints, disengages detents during autonomous flight to allow free movement, and responds to flight mode transitions. This multi-functionality reduces the need for separate safety mechanisms for manual and autonomous operations, thereby managing device complexity while maintaining safety across different flight modes.
Solution Approach 2:
The detent actuator automatically responds to flight mode transitions without requiring additional pilot input or complex control systems. When the flight control system detects a mode change, the detent actuator self-adjusts the detent engagement state accordingly, providing safety management through self-service operation that reduces overall system complexity.
Data Source
AI summary
An aircraft may include a control lever movable along a lever path and configured to control a system of the aircraft, and a selectively engageable detent feature configured to inhibit travel of the control lever and operable in a disengaged configuration in which the control lever is movable along the lever path without restriction by the selectively engageable detent feature, and an engaged configuration in which the selectively engageable detent feature inhibits travel of the control lever at a particular location along the lever path.