4D Navigation System for Aircraft Arrival Time Prediction
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Solution Overview
Problem
Current navigation systems lack the ability to reliably predict and display whether an aircraft can meet specific time constraints at waypoints, limiting their ability to adjust movement and arrive at predetermined locations on time.
Innovation Solution
A system and method that compute a vehicle's motion in four dimensions, including three spatial dimensions and time, providing a graphical display for operators to adjust movement and achieve desired arrival times, enabling reliable prediction and adjustment for timely arrivals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing navigation systems calculate and display ETA, then basic navigation information is provided, but the system cannot reliably predict whether required waypoint time constraints can be satisfied
Solution Approach 1:
The patent transitions from traditional 3D navigation (latitude, longitude, altitude) to 4D navigation by adding time as a fourth dimension. The system computes Estimated Time of Arrival (ETA) for each waypoint and compares it with Required Time of Arrival (RTA), enabling operators to assess whether time constraints can be satisfied. This dimensional expansion allows the system to provide reliable predictions about time constraint satisfaction rather than just displaying basic ETA information.
2Productivity
If the Free Flight program requires aircraft to reach specific points at specific times, then operational control and efficiency are improved, but existing navigation systems lack the capability to reliably meet these time constraints
Solution Approach 1:
The system implements feedback by continuously computing ETA for each waypoint and comparing it with the required RTA. The comparison result (whether the time constraint can be satisfied) is fed back to the operator through the display interface, enabling real-time assessment and adjustment of flight paths to ensure timely arrival at waypoints, thereby supporting the Free Flight program's productivity goals with reliable time constraint satisfaction.
3Ease of operation
If operators manually adjust flight paths to meet time constraints, then arrival timing can be controlled, but the process is complex and lacks real-time guidance
Solution Approach 1:
The system enables self-service navigation by automatically computing ETA, comparing it with RTA, and presenting the time constraint satisfaction status to the operator. This automated computation and presentation of critical timing information allows operators to make informed decisions about flight path adjustments without complex manual calculations, reducing the time and effort required for navigation management while improving ease of operation.
Data Source
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AI summary
A system and method are disclosed for computing a vehicle's motion in four dimensions (e.g., three spatial dimensions and time) and reliably predicting the vehicle's arrival time at a predetermined location, by providing a graphical display to an operator of the vehicle's progress that enables the operator to adjust the vehicle's movement and achieve the desired arrival time. Specifically, a system and method are disclosed for computing the movement of an aircraft in four dimensions, predicting its arrival time at a predetermined waypoint, and displaying (in a highly intuitive format) the aircraft's progress in achieving that desired arrival time. The pilot can then adjust the movement (e.g., speed) of the aircraft in accordance with the parameters) displayed, in order to achieve the desired arrival time. Thus, for example, numerous aircraft could be scheduled to arrive at a specific final approach waypoint at a predetermined rate (e.g., one aircraft per minute), which would enable the traffic controllers to optimize runway traffic without having to stack the aircraft in holding patterns and thereby waste fuel. Notably, although an example of an aircraft navigation and control system and method is disclosed, the system and method can be implemented for any type of vehicle (e.g., aircraft, spacecraft, ship, submarine, bus, train, automobile, etc.) whose operator desires to reach a particular location at a specified time.