UAV Take-off Control via Preset Rotor Speed
Solution Overview
Problem
Existing UAV take-off methods require skilled user operation and high technical proficiency, particularly in controlling attitude balance and propulsion power during launch, which can be unsafe and inefficient.
Innovation Solution
A method and apparatus for controlling an unmanned aerial vehicle (UAV) that involves receiving a take-off preparatory signal, rotating rotors at a preset speed lower than hover speed, and transitioning to a hovering mode at a predetermined height, allowing for safer and more user-friendly take-off operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a skilled user manually controls take-off by manipulating remote control device, then the UAV can achieve stable take-off with proper attitude balance and propulsion power control, but the operation complexity and skill requirements increase significantly
Solution Approach 1:
The UAV performs self-testing and self-preparation for take-off by automatically detecting its own state (attitude, propulsion power, rotor status) and determining whether take-off conditions are met, eliminating the need for skilled manual operation while ensuring safety through automated self-verification
Solution Approach 2:
The system performs preliminary take-off preparation by automatically testing propulsion power output, rotor rotation status, and attitude stability before actual take-off, and can cancel take-off if conditions are not met, preventing unsafe operations without requiring user expertise
2Loss of time
If the rotor rotates at high speed to enable immediate hover, then the take-off time is reduced, but the safety risk increases due to sudden high-speed rotation
Solution Approach 1:
The rotor undergoes preliminary rotation at a predetermined speed before actual take-off, allowing the system to test propulsion power and stabilize attitude in advance, then transitions to high-speed rotation only after confirming safe take-off conditions, reducing both time and safety risks
Solution Approach 2:
The system uses a intermediate predetermined rotor speed as a cushioning phase between stationary state and high-speed hover rotation, allowing safe testing and stabilization before full power engagement, preventing sudden harmful effects of immediate high-speed rotation
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
This approach reduces the operational complexity and skill requirements for UAV take-off, enhancing safety and usability by enabling stable hovering and normal flight states with reduced user expertise.
Implementation Method 1
controlling the at least one rotor of the UAV to rotate at a preset rotation speed in response to the take-off preparatory signal, wherein the preset rotation speed is smaller than a rotation speed that enables the UAV to hover in the air
Data Source
AI summary
A method and an apparatus for controlling an unmanned aerial vehicle (UAV) are provided. The UAV comprises at least one rotor. The method includes: receiving a take-off preparatory signal instructing the UAV to enter into a take-off preparatory state; controlling the at least one rotor of the UAV to rotate at a preset rotation speed in response to the take-off preparatory signal, wherein the preset rotation speed is smaller than a rotation speed that enables the UAV to hover in the air; and controlling the UAV to enter into a hovering mode under a predetermined condition, wherein the UAV is controlled to hover at a predetermined height in the hovering mode.