Aircraft Navigation Light Directional Control
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Solution Overview
Problem
Aircraft navigation lights, particularly for multi-directional aircraft like helicopters, often provide misleading information about the aircraft's direction due to fixed light emission patterns, which can confuse observers and compromise safety.
Innovation Solution
An exterior aircraft navigation light system with multi-color light sources (red, white, and green LEDs) and control circuitry that adjusts light emission based on the aircraft's momentary flight direction, ensuring accurate directional indication by selecting the appropriate color for each light emission unit within a predefined horizontal angle relative to the nominal forward flight direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed light emission patterns are used for navigation lights, then the device complexity is reduced and ease of manufacture is improved, but the reliability of conveying accurate directional information deteriorates for multi-directional aircraft
Solution Approach 1:
The navigation light system transitions from fixed emission patterns to dynamic control where the light emission direction and color are adjusted in real-time based on the aircraft's momentary flight direction. The control circuitry receives flight direction signals and dynamically selects which light emission units to activate and what color to emit, ensuring accurate directional information is conveyed regardless of the aircraft's orientation.
Solution Approach 2:
The system changes the parameters of light emission (color and direction) based on the aircraft's flight direction. Each light emission unit has a predefined horizontal angle and emits different colors (red, white, green) depending on the momentary flight direction, allowing the navigation light to adapt its emission characteristics to accurately represent the aircraft's orientation.
2Adaptability or versatility
If multiple light emission units with different predefined angles are used, then the adaptability to convey accurate flight direction in all scenarios is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The navigation light system is divided into multiple discrete light emission units, each with a predefined horizontal angle relative to the nominal forward flight direction. This segmentation allows the system to cover a wide range of flight directions by selectively activating specific units based on the aircraft's momentary orientation, while each individual unit remains a simple, manufacturable component.
Solution Approach 2:
Each light emission unit is designed to be multi-functional by incorporating a multi-color light source that can emit red, white, and green light. This universality allows a single physical unit to serve multiple directional indication purposes, reducing the total number of separate components needed while maintaining comprehensive coverage of all possible flight directions.
3Loss of information
If multi-color light sources are used in each emission unit, then the loss of information is reduced by providing accurate directional cues, but the energy consumption and use of energy increase
Solution Approach 1:
Instead of illuminating all directions equally, the system applies local quality by activating only the specific light emission units and colors that are relevant to the current momentary flight direction. This selective activation ensures accurate directional information is conveyed while minimizing energy consumption by keeping unnecessary light sources inactive.
Solution Approach 2:
The control circuitry periodically updates the light emission based on changes in flight direction, switching between different colors and units as needed. This periodic action ensures that the navigation light continuously provides accurate information while consuming energy only when direction changes occur, rather than maintaining constant multi-color emission from all units.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances passive safety by accurately conveying the aircraft's flight direction, regardless of its flight direction, by dynamically controlling light emission to match the momentary flight path, thus preventing misleading information and improving visibility in various flight scenarios.
Implementation Method 1
each of the at least one light emission unit comprises a multi-color light source configured to emit red light, white light and green light
Data Source
AI summary
An exterior aircraft navigation light for an aircraft having a nominal forward flight direction and being able to fly into the nominal forward flight direction as well as into a plurality of further flight directions, such as sideways or backwards, has at least one light emission unit and control circuitry coupled to the at least one light emission unit, wherein the exterior aircraft navigation light is configured such that each of the at least one light emission unit has a unit-specific light emission direction that has a predefined horizontal angle with respect to the nominal forward flight direction, and wherein each of the at least one light emission unit includes a multi-color light source configured to emit red light, white light and green light, and an optical system for conditioning the red light, the white light and the green light emitted by the multi-color light source.