Adjustable Rotor UAV Stability Control
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Solution Overview
Problem
Conventional small-sized unmanned aerial vehicles (UAVs) face stability issues when one of their rotating rotors malfunctions, leading to loss of horizontal stability and potential crashes, as they are unable to maintain balance effectively.
Innovation Solution
The UAV system includes a main body with support bars and rotating rotors, where drivers and a controller adjust the positions of the rotors to relocate the center of thrust to the center of mass, and a sensor detects rotor malfunctions to enable real-time stability control, allowing the UAV to maintain horizontal stability even with a malfunctioning rotor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UAV uses a fixed rotor configuration, then the structure is simple, but horizontal stability cannot be maintained when a rotor malfunctions
Solution Approach 1:
The patent applies the dynamics principle by making the rotor positions adjustable rather than fixed. The support bars can rotate relative to the main body, allowing the rotor configuration to dynamically change in response to malfunction conditions. This enables the UAV to adapt its thrust distribution to maintain stability when one or more rotors fail.
Solution Approach 2:
The patent implements parameter changes by altering the spatial parameters of the rotor system. When a rotor malfunctions, the controller adjusts the positions of the remaining functional rotors by rotating the support bars, thereby changing the thrust vector parameters to compensate for the lost rotor and maintain horizontal stability.
2Reliability
If the UAV has movable support bars to adjust rotor positions, then stability can be maintained during malfunction, but the device complexity increases
Solution Approach 1:
The support bars serve multiple functions: they provide structural support for the rotors, enable rotation to adjust rotor positions, and act as mechanical linkages between the drivers and the rotors. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while maintaining emergency handling capability.
Solution Approach 2:
The system implements self-service through automated detection and response. The controller automatically detects rotor malfunctions and triggers the position adjustment mechanism without human intervention, allowing the UAV to autonomously handle emergency situations and maintain stability.
3Manufacturing precision
If the rotor positions are fixed, then the device is simpler to manufacture, but the center of thrust cannot be relocated to maintain balance
Solution Approach 1:
The patent employs dynamics by transitioning from a static rotor configuration to a dynamic one where support bars can rotate. This allows the center of thrust to be dynamically relocated to match the center of mass when malfunctions occur, achieving precise alignment through motion rather than fixed manufacturing precision.
Solution Approach 2:
The system prepares for potential malfunctions in advance by pre-configuring the adjustable support bar mechanism. When a malfunction is detected, the system can quickly reposition rotors to realign the center of thrust with the center of mass, achieving the desired alignment without requiring complex real-time calculations or adjustments.
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 solution enables the UAV to maintain stability and prevent crashes by relocating the thrust center to the center of mass, ensuring safe flight and minimizing accident risks during emergencies.
Implementation Method 1
a driving cylinder that is connected between the shaft member and the main body and may rotate the shaft member by being expanded according to a control signal of the controller
Implementation Method 2
a plurality of rotating rotors that are respectively provided to the support bars and generate thrust
Implementation Method 3
a driving gear that is engaged with the driven gear and a forward motor that rotates the driving gear
Data Source
AI summary
The present invention provides an unmanned aerial vehicle that can maintain stability by changing positions of rotating rotors when one of the rotating rotors malfunctions, and a method for controlling stability of the unmanned aerial vehicle. The unmanned aerial vehicle includes: a main body; a plurality of support bars that are arranged while forming an angle with each other along a circumferential direction of the main body and extended to an outer side from the main body; a plurality of rotating rotors that are respectively provided to the support bars and generate thrust; motors that are respectively connected to the rotating rotors to drive the rotating rotors; drivers that change positions of the respective rotating rotors along the circumferential direction of the main body by moving the support bars with respect to the main body; and a controller that maintains horizontal stability of the main body by controlling the drivers.