Drone Rotor Speed Modulation for Radar Detection Precision
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Solution Overview
Problem
Existing flying bodies, such as drones, face challenges in achieving high precision detection due to vibrations caused by the rotation of their rotors, which interfere with radar detection operations.
Innovation Solution
The flying body incorporates a controller that adjusts the rotational speed of at least one rotor between detection and non-detection operations, minimizing the adverse effects of rotor vibrations on detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the rotor rotates at high speed to maintain flight, then the flying body can stay airborne, but the rotor vibration interferes with radar detection precision
Solution Approach 1:
The controller performs periodic speed changes of the rotor, alternating between a first speed and a second speed at predetermined intervals. During detection periods, the rotor speed is adjusted to reduce vibration interference, and then restored to normal operating speed. This periodic modulation allows the radar to detect vibrations caused by target objects with high precision while maintaining overall flight capability.
Solution Approach 2:
The rotor speed is made dynamic rather than constant. The controller adjusts the rotor speed between two different values based on operational requirements - using a first speed during detection phases to minimize vibration and a second speed during normal flight phases to maintain propulsion. This dynamic speed adjustment resolves the contradiction between maintaining flight speed and achieving detection precision.
2Measurement precision
If the rotor speed is reduced to minimize vibration, then detection precision improves, but the flying body loses flight stability
Solution Approach 1:
The system uses periodic speed changes where the rotor alternates between first and second speeds at predetermined intervals. During detection periods, the speed is adjusted to improve precision, then restored to maintain flight stability. This periodic alternation ensures that flight stability is not compromised long-term while achieving high detection precision during measurement windows.
Solution Approach 2:
The controller performs speed adjustment in advance of the detection operation. By changing the rotor speed to the first speed before detection begins, the system prepares the vibration environment optimally for detection. After detection, the speed is restored to the second value to maintain flight stability, ensuring that stability requirements are met for subsequent operations.
Data Source
AI summary
According to one embodiment, a flying body includes a radar, a supporter, a plurality of rotors supported by the supporter, and a controller. The rotors include a first rotor. The radar is configured to perform a detection operation and a non-detection operation. The controller is configured to perform a first control operation in a first transition from the non-detection operation to the detection operation. The controller is configured to perform a first change in the first control operation to change a rotational speed of the first rotor from a rotational speed of the first rotor in the non-detection operation. The detection operation is performed after the first control operation.