RNP Approach Procedure Constant Radius Transitions
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Solution Overview
Problem
Current RNP procedures are not widely accepted in high congestion airports due to difficulties in integrating with preferred traffic patterns and separation requirements of air traffic controllers, leading to inefficiencies in aircraft operations and missed fuel, operation, and emission savings.
Innovation Solution
An air traffic control system that programs a processing device with geographical points defining approach paths and assigns speeds to aircraft flying RNP procedures, allowing for constant radius transitions that maintain separation and sequencing, accommodating both RNP and non-RNP aircraft, thereby simplifying traffic control and increasing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If RNP procedures are implemented to improve aircraft operational efficiency, then fuel savings and emission reductions are achieved, but integration with air traffic control separation requirements becomes difficult
Solution Approach 1:
The patent applies local quality by allowing different aircraft to follow different approach paths (e.g., direct RNP approaches for some aircraft, traditional traffic patterns for others) based on their specific capabilities and the traffic situation. This enables RNP-capable aircraft to benefit from efficient direct approaches while maintaining compatibility with non-RNP aircraft following conventional patterns, thus resolving the contradiction between fuel efficiency and traffic pattern integration.
Solution Approach 2:
The system dynamically assigns different approach procedures to different aircraft based on real-time traffic conditions, aircraft capabilities, and separation requirements. Rather than requiring all aircraft to follow a fixed pattern, the system adapts the approach paths and sequencing dynamically, allowing RNP procedures to be implemented where beneficial while maintaining overall traffic flow management.
2Productivity
If RNP procedures are used to enable precise navigation and efficient approaches, then operational efficiency improves, but air traffic controller workload increases due to difficulty in managing mixed traffic
Solution Approach 1:
The patent segments the approach area into multiple distinct paths and zones, with dedicated RNP approach corridors and traditional traffic patterns. This segmentation allows air traffic controllers to manage different types of aircraft on separate, well-defined paths, reducing the complexity of managing mixed traffic while maintaining high efficiency for RNP-capable aircraft.
Solution Approach 2:
The system introduces standardized transition points and holding patterns as intermediary elements that facilitate the integration of RNP approaches with traditional traffic management. These intermediaries provide structured transition zones where aircraft can be sequenced and separated in a manageable way, reducing controller workload while enabling efficient RNP operations.
3Ease of operation
If uniform speed and descent rates are applied to all aircraft, then traffic control is simplified, but aircraft operational efficiency is reduced
Solution Approach 1:
The patent applies local quality by allowing different speed and descent rate profiles for different aircraft based on their capabilities and approach paths. RNP-capable aircraft can maintain optimal speeds and descent rates for their specific aircraft characteristics, while non-RNP aircraft follow more conservative, uniformly controlled profiles. This resolves the contradiction by enabling efficient individualized control where appropriate while maintaining simplified uniform control where necessary.
Data Source
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AI summary
A required navigation performance (RNP) approach method is described that includes providing a plurality of fixed, predetermined waypoints associated with at least one runway of at least one airport, providing a predetermined plurality of constant radius turnpoints connecting a downwind leg of the runway to a final approach leg of the runway, and assigning one of the constant radius turnpoints to an aircraft capable of flying an RNP approach, the turnpoint selected to provide separation from other approaching aircraft and a landing time for the aircraft.