Dual-Rotor Flight Control for Clutch Transmission Imbalance
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Solution Overview
Problem
Conventional flight devices with engine-driven rotors face issues due to individual variations in power connection/disconnection units, leading to unstable operations such as unbalanced rotor rotation during takeoff, which can affect the drone's orientation and control.
Innovation Solution
The flight device incorporates a dual main rotor system with independent power transmission and connection units, along with an arithmetic control unit that adjusts flight status based on rotational speed measurements and power transmission differences, enabling safe landing and stable operation even in the event of defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a power connection/disconnection unit (clutch) is provided between the engine and the rotor to enable continuous flight, then the flight duration is extended, but individual variations in timing and engine speed occur due to machining tolerances, adversely affecting operation stability
Solution Approach 1:
The control unit continuously monitors the rotational speeds of the rotors and compares them against predetermined conditions. When a discrepancy exceeding a threshold is detected, the system automatically adjusts flight status (e.g., landing notification). This closed-loop feedback mechanism compensates for variations in clutch timing and engine speed, ensuring stable operation despite manufacturing tolerances.
Solution Approach 2:
The system changes operational parameters dynamically by monitoring rotor rotational speeds and adjusting flight status based on real-time comparisons. When the speed difference between rotors exceeds a predetermined threshold, the system transitions from normal flight operation to landing procedure, effectively adapting to variations in power transmission timing.
2Ease of operation
If a centrifugal clutch is used to connect the engine to the rotor, then the engine can be disconnected from the rotor at low speeds, but individual variations in connection timing cause unbalanced rotor rotation during takeoff, affecting drone orientation control
Solution Approach 1:
The control unit monitors rotor rotational speeds in real-time and compares them against predetermined conditions. When a speed discrepancy indicating unbalanced rotation is detected, the system automatically triggers landing procedures. This feedback mechanism ensures that harmful effects of timing variations are mitigated by preventing operation under unstable conditions.
Solution Approach 2:
The system performs preliminary monitoring of rotor speeds before takeoff and during flight transitions. By detecting potential imbalances early (when rotor speed differences exceed thresholds), the system preemptively initiates landing procedures, preventing the development of harmful unbalanced rotation effects.
Data Source
AI summary
Provided is a flight device and a flight device control method that ensure safety even if a defect occurs in a power connection/disconnection unit. Rotor-side power transmission units 26 of a flight device 10 include first and second rotor-side power transmission units 261 and 262. Power connection/disconnection units 27 transmit power according to conditions and include first and second power connection/disconnection units 271 and 272. The first power connection/disconnection unit 271 is provided between a first engine-side power transmission unit 251 and the first rotor-side power transmission unit 261. The second power connection/disconnection unit 272 is provided between a second engine-side power transmission unit 252 and the second rotor-side power transmission unit 262. The arithmetic control unit 31 changes the flight status when the degree to which the first power connection/disconnection unit 271 transmits the power and the degree to which the second power connection/disconnection unit 272 transmits the power differ by a certain amount or more.