Quick Release Mechanism for Hybrid UAV Tethered Flight
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Solution Overview
Problem
Current UAV systems face limitations in surveillance capabilities due to tethered drones' restricted movement and limited flight time, requiring multiple systems for continuous coverage and necessitating complex setups to track moving targets, especially in inaccessible terrain.
Innovation Solution
A quick release mechanism (QRM) is integrated into UAVs to instantaneously detach from tether assemblies, allowing untethered flight and automatic reattachment, enabling autonomous pursuit and recharging, with a drag device to control descent and ensure safe retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the drone is tethered to a base system for uninterrupted flight time, then the flight duration is extended, but the drone's movement freedom is restricted to lateral motion only
Solution Approach 1:
The system dynamically transitions between tethered and untethered states based on operational needs. The quick release mechanism allows the drone to switch from a constrained tethered configuration to an unconstrained untethered configuration, enabling adaptive movement freedom while maintaining extended flight capability through periodic recharging.
Solution Approach 2:
The tether assembly is segmented into separable components that can be quickly detached. The quick release mechanism divides the tether connection into modular elements that can be independently engaged or disengaged, allowing the drone to separate from the tether for free flight while maintaining the option to reconnect for recharging.
2Reliability
If multiple tethered drone systems are deployed to maintain continuous surveillance of moving targets, then continuous coverage is achieved, but the system complexity and quantity of devices increase
Solution Approach 1:
The drone is designed with multi-functionality, capable of operating in both tethered and untethered modes. This universal design allows a single drone system to perform continuous surveillance of moving targets by transitioning between tethered recharging and untethered pursuit, eliminating the need for multiple specialized systems.
Solution Approach 2:
The drone autonomously manages its own recharging needs by returning to the base station when battery level requires recharging. This self-service capability allows the drone to independently handle the tethered/untethered transition for recharging, maintaining continuous surveillance without requiring additional support systems or operators.
3Productivity
If the tether assembly is quickly released to enable free flight, then the drone can pursue moving targets autonomously, but the tether assembly must be safely controlled during descent
Solution Approach 1:
A drag device is pre-deployed from the drone upon tether release to provide immediate air resistance and control the descent of the tether assembly. This beforehand cushioning mechanism prevents uncontrolled free-fall of the tether assembly while the drone ascends to pursue targets, safely managing the separation process.
Solution Approach 2:
The drag device acts as an intermediary between the tether assembly and the environment during separation. It mediates the descent process by providing controlled air resistance, allowing the tether assembly to descend safely while the drone moves freely to pursue targets without being constrained by the falling tether.
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
Enables UAVs to freely pursue targets and maintain continuous surveillance without the need for multiple systems, enhancing operational flexibility and efficiency in various environments.
Implementation Method 1
a drag device (e.g., a parachute, winged assembly, or mini drone) attached to the tether assembly to control descent of the tether assembly after the tether assembly is released from the UAV
Data Source
AI summary
An unmanned aerial vehicle system includes an unmanned aerial vehicle, a tether assembly selectively coupled to the unmanned aerial vehicle, a processor, and a memory. The memory contains instructions thereon, which, when executed by the processor, cause the system to disconnect the tether assembly from the unmanned aerial vehicle.