Speed-Based Collision Avoidance Alert Thresholds
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Solution Overview
Problem
Conventional aircraft collision avoidance systems, such as TCAS, are inadequate for high-performance aircraft flying at high speeds and low altitudes, as they typically rely on altitude-based alert thresholds, leading to premature alerts with insufficient time for course changes.
Innovation Solution
Implementing a collision avoidance system with speed-based alert thresholds that adjust sensitivity levels relative to predicted closest approach times based on aircraft speed, ensuring timely alerts without false alarms, using a TCAS computer with a speed-based threshold unit that determines alert times based on the aircraft's speed to allow sufficient reaction time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If altitude-based alert thresholds are used in conventional collision avoidance systems, then alerts are issued based on standard civil aviation assumptions, but high-speed aircraft at low altitudes receive premature alerts with insufficient time for course changes
Solution Approach 1:
The patent changes the basis for alert thresholds from altitude-based parameters to speed-based parameters. The system determines an alert threshold time based on the own aircraft's speed, allowing high-speed aircraft to receive alerts with sufficient reaction time while maintaining appropriate sensitivity for lower-speed aircraft. This parameter change resolves the contradiction by adapting the alert timing to the actual operational characteristics of different aircraft types.
2Loss of time
If speed-based alert thresholds are implemented, then high-speed aircraft receive timely alerts with sufficient reaction time, but may increase false alarms and pilot complacency if not properly calibrated
Solution Approach 1:
The system dynamically adjusts the alert threshold time based on the own aircraft's current speed rather than using fixed altitude-based thresholds. The conflict detection unit continuously monitors speed and recalculates the appropriate alert threshold time, ensuring that the system adapts to changing flight conditions. This dynamic approach maintains reliability by providing accurate, context-appropriate alerts while giving high-speed aircraft the reaction time they need.
Solution Approach 2:
The system uses feedback from the aircraft's speed measurements to continuously adjust alert threshold timing. By monitoring the own aircraft's speed and using this information to determine appropriate alert thresholds, the system ensures that alerts are issued at the correct time for the current flight conditions, maintaining pilot trust while providing adequate reaction time.
3Adaptability or versatility
If conventional TCAS systems are used designed for civil aviation, then they comply with RTCA DO-185B standards assuming low speeds at low altitudes, but they fail to provide adequate collision avoidance for high-performance military aircraft
Solution Approach 1:
The patent creates a universal conflict detection system that can adapt to different aircraft types and operational contexts. By using speed-based rather than altitude-based thresholds, the system becomes universally applicable to both civil aviation aircraft and high-performance military aircraft, while maintaining compliance with relevant standards through its adaptive threshold calculation approach.
Data Source
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AI summary
This disclosure is directed to systems and methods for aircraft collision avoidance with speed-based collision alert time thresholds. In one example, a system is configured to determine predicted trajectories for an own aircraft and a target aircraft. The system is further configured to determine whether a violation of protected airspace is predicted between the own aircraft and the target aircraft. The system is further configured to determine whether a predicted time to closest approach between the own aircraft and the target aircraft is less than an alert threshold time based on a speed of the own aircraft. The system is further configured to generate an alert output, in response to determining that a violation of protected airspace is predicted and that the predicted time to closest approach between the own aircraft and the target aircraft is less than the alert threshold time based on the speed of the own aircraft.