Drone Yaw Stabilization for Tumbling-Free Emergency Descent
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Solution Overview
Problem
Drones experience tumbling and loss of control during flight failures, leading to unstable posture and rapid descent, which complicates parachute deployment and safe landing.
Innovation Solution
A drone fall prevention system with a first rotation stabilizing portion on the top surface and an optional second on the bottom, both equipped with motors and propellers, stabilizes the drone's posture by generating angular velocity and thrust force, minimizing yaw axis errors and delaying descent speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drone experiences a propulsion failure during flight, then the drone loses thrust and begins to descend, but the drone enters a tumbling state with unstable posture and rapid descent
Solution Approach 1:
The rotation stabilizing portion is activated in advance upon detecting propulsion failure to counteract the tumbling motion before it becomes uncontrollable. The stabilizing portion generates rotational force in the opposite direction of the tumbling to prevent posture instability and enable controlled descent.
Solution Approach 2:
The system changes the rotational speed and direction of the rotation stabilizing portion dynamically to adjust the drone's posture parameters. By controlling the angular velocity of the stabilizing portion, the system maintains optimal posture stability during the failure state and enables controlled parachute deployment.
2Loss of time
If the drone enters a tumbling state during failure, then the drone's posture becomes unstable, but the time available for parachute deployment is reduced
Solution Approach 1:
The rotation stabilizing portion counteracts tumbling motion immediately upon failure detection, preventing the drone from entering an uncontrollable tumble state. This stabilization buys critical time for parachute deployment by maintaining posture control during the emergency descent phase.
Solution Approach 2:
The system prepares for parachute deployment by stabilizing the drone posture in advance. The rotation stabilizing portion maintains controlled orientation and descent rate, ensuring the drone is in a stable state ready for parachute deployment and reducing the rush to deploy within a limited time window.
3Stability of the object's composition
If the drone uses rotation stabilizing portions to prevent tumbling, then the drone's posture is stabilized, but additional components increase device complexity
Solution Approach 1:
The rotation stabilizing portion serves multiple functions: it prevents tumbling during propulsion failure, maintains posture stability during controlled descent, and enables proper orientation for parachute deployment. By consolidating these stabilization functions into a single integrated component, the system achieves comprehensive posture control without proportionally increasing complexity.
Solution Approach 2:
The rotation stabilizing portion is controlled automatically by the flight control system based on sensor feedback about the drone's posture and failure state. The system self-regulates the stabilizing portion's rotational speed and direction without requiring manual intervention, reducing operational complexity while maintaining effective posture stabilization.
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
Prevents tumbling, stabilizes the drone's posture, delays descent to allow parachute deployment, and maintains altitude by generating thrust, ensuring a safe and controlled landing.
Implementation Method 1
a first rotation stabilizing portion disposed on a top surface of the main body to generate an angular velocity with respect to a yaw axis of the main body
Implementation Method 2
a motor configured to provide a rotational force to the propeller, and may be configured to generate an angular velocity with respect to the yaw angle of the main body and a thrust force for the main body at the same time
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
A drone according to an example embodiment includes a main body; a propulsion portion provided outside the main body to generate a thrust force; a first rotation stabilizing portion disposed inside the main body or on a top surface of the main body to generate an angular velocity with respect to a yaw axis of the main body; and a controller configured to control driving of the first rotation stabilizing portion, wherein when the propulsion portion fails, the controller stabilizes a posture of the main body by driving the first rotation stabilizing portion, to prevent an occurrence of a tumbling phenomenon.