ESA Radar Panel Layout for Full-Sphere Aircraft Collision Avoidance
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Solution Overview
Problem
Current collision avoidance systems for aerial vehicles are inadequate for noncooperative targets and are heavy and costly for lightweight vehicles, lacking effective spherical coverage and maneuvering capability assessment.
Innovation Solution
A system utilizing a plurality of electronically scanned array (ESA) antennas for spherical radar coverage, combined with a directional communication network and positioning system, determines threat positions and vectors, and generates maneuvers based on maneuvering capabilities for both cooperative and noncooperative aerial vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional TCAS hardware is used for collision avoidance, then cooperative target detection is achieved, but the system becomes heavy and power-intensive for lightweight aerial vehicles
Solution Approach 1:
The patent replaces traditional mechanical TCAS hardware with an electronically scanned array (ESA) radar system that uses electronic beamforming and signal processing to achieve collision avoidance. This substitution of mechanical/electronic components with software-defined radar processing reduces physical weight while maintaining detection capabilities for both cooperative and non-cooperative targets
Solution Approach 2:
The ESA radar system performs multiple functions including cooperative target detection, non-cooperative target detection, situational awareness, and collision avoidance warnings within a single integrated platform. This multi-functionality eliminates the need for separate specialized hardware systems, reducing overall system weight and power consumption
2Adaptability or versatility
If traditional radar systems are used for spherical coverage, then full-volume threat detection is achieved, but the system complexity and cost increase significantly
Solution Approach 1:
The patent divides the spherical coverage volume into multiple sectors or zones that can be scanned sequentially by the ESA radar. The system segments the 360-degree horizontal and vertical coverage into manageable angular sectors, allowing comprehensive surveillance through electronic beam steering without requiring complex omnidirectional hardware arrays
Solution Approach 2:
The ESA radar employs dynamic electronic beam steering to redirect radar energy across different angular positions in three-dimensional space. This dynamic beamforming capability allows the system to achieve spherical coverage by sequentially illuminating different sectors through electronic control of phase and amplitude across antenna elements, avoiding static complex omnidirectional structures
3Weight of moving object
If collision avoidance systems are designed for lightweight aerial vehicles, then weight and power consumption are reduced, but maneuvering capability assessment and response time are compromised
Solution Approach 1:
The system performs preliminary assessment of threat maneuvering capabilities by analyzing target characteristics such as size, speed, and flight dynamics before collision avoidance maneuvers are required. This preliminary classification allows the lightweight vehicle to pre-calculate appropriate response maneuvers and reduce reaction time when threats are detected
Solution Approach 2:
The collision avoidance system continuously monitors relative position, velocity, and acceleration between the lightweight aerial vehicle and detected threats, providing real-time feedback to the control system. This feedback loop enables dynamic adjustment of avoidance maneuvers based on actual threat behavior and vehicle performance constraints, optimizing response speed within weight limitations
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
Provides lightweight, cost-effective collision avoidance with high-resolution threat proximity measurements and situational awareness, enabling safe maneuvering for both cooperative and noncooperative aerial vehicles.
Implementation Method 1
a plurality of electronically scanned array (ESA) antenna angularly distributed and mounted onboard a first aerial vehicle, the plurality of ESA antenna configured for a spherical radar coverage around the first aerial vehicle
Data Source
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AI summary
A system and method (800) for cooperative aerial vehicle collision avoidance provides an ESA-based sensor network capable of high-resolution threat proximity measurements and cooperative and non-cooperative collision avoidance in the full spherical volume surrounding an aerial vehicle. The system incorporates a plurality of ESA panels onto the airframe where the conical scan volumes overlap leaving no gaps in spherical proximity coverage. The resulting received data is stitched together between the neighboring ESA panels and used to determine a position and vector for each threat aerial vehicle within range. The data is transmitted through a cooperative collision avoidance network to nearby aerial vehicles, and presented to the autopilot and flight crew to increase situational awareness. The system determines a maneuver for the aerial vehicle and a maneuver for the threat aerial vehicle based on relative maneuvering capabilities to maintain desired separation.