UAV Ice Detection and Removal via Superhydrophobic Coating

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Solution Overview

Problem

Small unmanned aerial vehicles (UAVs) face challenges in ice accumulation due to power and weight constraints, as existing ice removal systems are too heavy and power-intensive, compromising flight performance and safety.

Innovation Solution

A compact, low-power ice formation detection and removal system featuring a superhydrophobic coating and carbon nanotube heaters integrated with capacitive sensors, which autonomously detect and thermally detach ice from aerodynamic surfaces, ensuring flight safety in icy conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional ice removal systems are applied to small UAVs, then ice can be removed from aerodynamic surfaces, but the system becomes too heavy and power-intensive for small UAVs

Engineering Contradiction:

Improveice removal effectivenessVSAvoidsystem weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The patent applies thin-film heating elements directly onto the aerodynamic surfaces of the UAV. These flexible thin films conform to the surface geometry and provide ice removal functionality without adding significant weight, resolving the contradiction between effective ice removal and system weight constraints.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent uses composite material structures combining the thin-film heating elements with the aerodynamic surface itself, rather than adding separate heavy ice removal components. This integration achieves ice removal functionality while maintaining the lightweight characteristic essential for small UAVs.

Inventive Principle:

Principle #40Composite materials

2Reliability

If conventional ice removal systems are applied to small UAVs, then ice can be removed from aerodynamic surfaces, but the system consumes too much power for small UAVs with limited power margins

Engineering Contradiction:

Improveice removal effectivenessVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The thin-film heating elements have low electrical resistance and can be precisely controlled, enabling effective ice removal with minimal power consumption. This resolves the contradiction between ice removal effectiveness and power consumption by providing a highly efficient heating solution adapted to the limited power margins of small UAVs.

Inventive Principle:

Principle #30Flexible shells and thin films

3Reliability

If ice accumulates on aerodynamic surfaces, then flight performance is maintained, but drag increases and lift decreases

Engineering Contradiction:

Improveflight safetyVSAvoidflight performance

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The capacitive sensors continuously monitor the aerodynamic surfaces for early signs of ice accumulation. By detecting ice formation at its earliest stages, the system can activate the heating elements before significant ice buildup occurs, preventing the degradation of flight performance while maintaining flight safety through proactive ice management.

Inventive Principle:

Principle #10Preliminary action

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 system effectively detects and removes ice accumulation on UAVs, enabling safe flight in conditions that would otherwise be hazardous, while adhering to the stringent power and weight limitations of small UAVs.

Implementation Method 1

having a superhydrophobic coating applied to at least a portion of the at least one fixed-wing or the aerodynamic surface that may be subject to icing

Methodology Applied

Scientific EffectSuperhydrophobic effect: Hydrophobe

Implementation Method 2

at least one capacitive sensor configured to detect ice formation on the at least one fixed-wing or aerodynamic surface

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 3

having at least one heater configured to be energized by the power supply

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 4

having a superhydrophobic coating applied to at least a portion of the at least one fixed-wing or the aerodynamic surface that may be subject to icing

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS10822097B2Ice formation detection and removal system for an aerial vehicle and method

Publication Date: 2020.11.03 BOOZ ALLEN HAMILTON INC

AI summary

A fixed-wing aerial vehicle includes: a fuselage with an on-board power supply; at least one fixed-wing or aerodynamic surface having at least one heater configured to be energized by the power supply, and having a superhydrophobic coating applied to at least a portion of the at least one fixed-wing or the aerodynamic surface that may be subject to icing; at least one capacitive sensor configured to detect ice formation on the at least one fixed-wing or aerodynamic surface; and a controller configured to selectively activate the at least one heater in response to detected ice formation.