UAV Winch Delivery Control for Safe Package Lowering
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Solution Overview
Problem
Existing UAV systems face issues such as package damage due to improper velocity control during delivery, complex landing requirements, and inefficient battery charging processes, which can be time-consuming and laborious.
Innovation Solution
The UAV design includes a winch mechanism for controlled package delivery, a landing apparatus with enhanced precision landing capabilities, and a battery replacement system that allows continuous operation without repeated initialization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UAV lowers the package at a high velocity, then the delivery time is reduced, but the package may become damaged by impact with the ground
Solution Approach 1:
The winch mechanism dynamically adjusts the lowering velocity of the package during descent. The system transitions from a constant velocity approach to a variable velocity profile, where the velocity changes based on the package's position and proximity to the ground, enabling both efficient delivery and safe landing
Solution Approach 2:
The control system continuously monitors the package's descent status and provides feedback to adjust the winch motor operation. This feedback mechanism enables real-time velocity modulation to prevent impact damage while maintaining efficient delivery timing
2Area of stationary object
If the UAV uses a small moving target landing pad, then the landing area is reduced, but the control complexity increases
Solution Approach 1:
The landing apparatus incorporates self-aligning features that automatically guide the UAV to the correct landing position. The system uses onboard sensors and automated control to compensate for the small landing pad size, reducing the need for complex external control algorithms and manual intervention
3Ease of operation
If the battery is removed for charging, then the charging process can begin, but the UAV loses power and requires rebooting
Solution Approach 1:
The power supply system is segmented into modular battery units that can be independently replaced. The UAV chassis includes multiple battery compartments, allowing one battery to be removed and replaced with a charged unit while the system remains operational, eliminating reboot requirements
Solution Approach 2:
The dual-battery configuration enables continuous operation of the UAV. While one battery is in use, the other can be charged or prepared, ensuring that the UAV never loses power during battery maintenance operations, thereby maintaining continuous useful action without interruption
4Ease of operation
If the charge cord is attached for battery charging, then the charging process can begin, but the operator must perform extra steps causing material wear
Solution Approach 1:
The battery replacement function and charging function are merged into a single integrated operation. When a battery is removed from the UAV, it is automatically connected to the charging system through the chassis interface, eliminating the need for separate cord attachment steps and reducing material wear from repeated plugging and unplugging
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
The solution provides controlled package delivery, improved landing accuracy, and efficient battery replacement, reducing damage and operational time, while maintaining system functionality.
Implementation Method 1
at least one rotor operable to generate lift under control of the control system
Implementation Method 2
a winch mechanism (300) mounted to the UAV
Implementation Method 3
a heating coil (335) in communication with the control system... heating the heating coil (335) to a temperature sufficient to melt and/or burn through the line (340)
Data Source
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AI summary
An unmanned aerial vehicle according to certain embodiments generally includes a chassis, a power supply mounted to the chassis, a control system operable to receive power from the power supply, at least one rotor operable to generate lift under control of the control system, and a winch mounted to the chassis. The winch includes a reel and a motor. The reel has a line wound thereon, the line having a free end. The reel includes a circumferential channel in which a wound portion of the line is wound onto the reel. The circumferential channel includes an inner portion, an outer portion, and a passage connecting the inner portion and the outer portion. The motor is operable to rotate the reel under control of the control system to thereby cause the line to wind onto and off of the reel, thereby causing the free end of the line to raise and lower.