UAV Tether Winch Control for Intentional Pull Detection
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Solution Overview
Problem
Current unmanned aerial vehicle (UAV) systems lack effective methods for user interaction and feedback control of tethers, particularly in scenarios where intentional user forces are applied, which can lead to unintended operation or damage.
Innovation Solution
A control system that determines operational parameters of a motor winch in a UAV to detect intentional user interactions with the tether, allowing for a motor response process to adjust and provide feedback, thereby controlling the tether for interaction and feedback purposes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the UAV system allows free user interaction with the tether, then user control and feedback capability is improved, but system safety and risk of damage increases
Solution Approach 1:
The control system continuously monitors operational parameters of the motor (current, voltage, speed) to detect user interactions with the tether. When a pull or force is detected, the system provides immediate feedback by adjusting motor response to maintain controlled tension, preventing runaway scenarios while allowing intentional user manipulation for feedback purposes
Solution Approach 2:
The control system preemptively counteracts unintended tether movements by detecting operational patterns indicative of accidental pulls versus intentional interactions. When unintended interaction is detected, the motor automatically applies counter-tension or stops unwinding to prevent damage before it occurs
2Reliability
If the control system monitors operational parameters to detect user interactions, then system safety is improved, but device complexity increases
Solution Approach 1:
The control system utilizes existing motor operational parameters (current, voltage, speed) that are already being monitored for basic winch operation. By analyzing these existing data streams for patterns indicative of user interaction, the system achieves safety monitoring without adding separate sensors or measurement systems
Solution Approach 2:
The motor control system serves dual purposes: it controls the winch operation for payload delivery and simultaneously monitors for user interactions by analyzing the same operational parameters. This multi-functionality eliminates the need for dedicated safety monitoring hardware
3Measurement precision
If the motor responds to all tether movements, then control precision is improved, but ease of operation deteriorates due to restricted user interaction
Solution Approach 1:
The control system dynamically adjusts its response based on the detected operational pattern. For patterns indicating intentional user interaction, the motor maintains a compliant, high-precision control mode that allows controlled movement. For patterns indicating accidental pulls or unintended movements, the system switches to a restrictive mode with higher control precision to prevent damage
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 safe and controlled user interaction with UAV systems by interpreting user forces and adjusting motor responses, preventing potential damage and ensuring planned operations are executed correctly.
Implementation Method 1
determining one or more operational parameters of a motor for a winch disposed in an aerial vehicle
Data Source
AI summary
Described herein are methods and systems for motorized control of a tether, such as for purposes of user interaction and feedback. In particular, a UAV's control system may determine one or more operational parameters of a motor for a winch disposed in the UAV, the winch including the tether and a spool. The control system may then detect in the one or more operational parameters, an operational pattern of the motor that is indicative of an intentional user-interaction with the tether. Based on the detected operational pattern of the motor that is indicative of the intentional user-interaction with the tether, the control system may determine a motor response process. Then, the control system may operate the motor in accordance with the determined motor response process.