Active Rotor Blade Control for Vibration Damping
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Solution Overview
Problem
Rotor blades in rotorcraft and wind turbines experience unstable motions, leading to potential damage from unchecked vibrations and resonance, particularly during changes in flight or operational modes, where existing stabilization methods are inadequate.
Innovation Solution
A method involving a controller that reads sensor data from rotor blades, determines out-of-compliance motions, and outputs control signals to actuators to adjust drag, lift, or torsion, using algorithms like proportional or state-space control to counteract deviations from nominal motions, thereby stabilizing the rotor blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If existing stabilization methods are used for rotor blades, then some level of stability is maintained, but the rotor blades still experience unstable motions and vibrations during changes in flight or operational modes
Solution Approach 1:
The control system continuously monitors rotor blade motion using sensors and automatically adjusts actuator positions based on detected deviations from nominal motion, creating a closed-loop feedback system that actively suppresses unstable motions and vibrations during flight mode transitions
Solution Approach 2:
The system dynamically adjusts actuator positions in real-time based on changing flight conditions and rotor blade motion characteristics, allowing the stabilization mechanism to adapt to different operational modes and frequency ranges rather than relying on fixed mechanical stabilization
2Stability of the object's composition
If active control signals are applied to actuators to counteract out-of-compliance motion, then rotor blade stability is improved, but the system complexity increases
Solution Approach 1:
The control system autonomously detects rotor blade deviations and generates appropriate control signals without external intervention, with the controller automatically processing sensor data and commanding actuators to restore nominal motion, reducing the need for external pilot input or complex mechanical stabilization mechanisms
Data Source
AI summary
A method for stabilizing a motion of a rotor blade of a rotor comprising the steps: read into a controller, a measurement from a sensor responsive to said rotor blade; determine an out-of-compliance motion of the rotor blade; and output a first control signal to an actuator affecting the rotor blade such that a vibration mode of said rotor blade is dampened. The damping may be achieved by changing the drag, lift or torsion of the rotor blade. The out-of-compliance motion may be a lead, lag, upward motion, downward motion or twist of the rotor blade away from a nominal value.