Aircraft Flight Status Signal Calculation via Multi-Source Logic
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Solution Overview
Problem
Current aircraft communication and data systems lack a reliable signal indicating whether the aircraft is on the ground or in the air, which hinders systems such as door closure management.
Innovation Solution
A device and method that calculate a flight status signal based on flight speed, engine, evacuation, front undercarriage, and main undercarriage signals, transmitted via a bus like Ethernet or AFDX, to determine if the aircraft is airborne or on the ground, and use this signal to generate a reliable door closure signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple different signal sources are combined to calculate the flight status signal, then the reliability of the flight status signal is improved, but the device complexity increases
Solution Approach 1:
The system segments the flight status determination into multiple independent signal sources (flight speed signals from different sensors, engine status signals, evacuation signals, undercarriage status signals). Each signal source is evaluated separately through dedicated evaluation units, and the results are combined through logic operations to produce the final flight status signal. This segmentation allows the system to achieve high reliability through redundancy while maintaining manageable complexity through modular architecture.
Solution Approach 2:
The device uses a universal calculation unit that can process multiple types of input signals (flight speed, engine status, evacuation, undercarriage status) through the same evaluation and logic operation framework. This multi-functional approach allows the system to evaluate diverse signal sources using a unified methodology, improving reliability through comprehensive signal integration while avoiding the complexity of separate dedicated processing paths for each signal type.
2Measurement precision
If a flight status signal is generated by evaluating multiple signal sources, then the accuracy of aircraft status determination is improved, but the calculation time increases
Solution Approach 1:
The system performs preliminary evaluation of each input signal source through dedicated evaluation units that assess the validity and state of individual signals (flight speed, engine status, evacuation, undercarriage status) before combining them. This preliminary action allows the main logic operation unit to quickly determine the flight status by processing pre-evaluated results rather than analyzing raw signals from multiple sources, thereby improving accuracy while minimizing calculation time.
Solution Approach 2:
The system replaces complex mechanical or sequential evaluation methods with electronic signal processing and logic operations. Multiple signal sources are evaluated simultaneously through parallel electronic circuits and logic units, and the flight status is determined through rapid logical combination of these evaluations. This substitution of electronic processing for mechanical or sequential methods achieves high measurement precision without significant time loss.
3Reliability
If the flight status signal is calculated from multiple independent signals, then the situation-dependent door closure signal reliability is improved, but the system complexity increases
Solution Approach 1:
The flight status signal serves as an intermediary that mediates between multiple independent input signals (flight speed, engine status, evacuation, undercarriage status) and the door closure control system. Rather than directly processing all input signals for door control, the system first combines them into a unified flight status signal, which then serves as the basis for generating the door closure signal. This intermediary approach improves door closure reliability by ensuring it is based on comprehensive flight status assessment while reducing system complexity through signal abstraction.
Solution Approach 2:
The system segments the door closure control into two distinct functional stages: first, generation of the flight status signal from multiple input sources, and second, generation of the door closure signal from the flight status signal combined with additional parameters (altitude, pressure differential). This segmentation allows each stage to be optimized independently, improving overall reliability while managing system complexity through clear functional separation.
Data Source
AI summary
The present invention provides a device for providing an aircraft flight status signal which indicates whether the aircraft is in the air or on the ground, which device calculates the flight status signal as a function of a number of differently provided flight speed signals, a number of differently provided engine status signals, a number of differently provided evacuation signals, a number of differently provided front undercarriage status signals and a number of differently provided main undercarriage status signals.