Real-Time Ice Estimation Algorithm for Aircraft Safety

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Solution Overview

Problem

Current methods for monitoring ice formation on aircraft during flight are not capable of real-time detection, leading to potential safety risks due to the inability to adjust operations effectively in response to changing aerodynamic conditions caused by ice accumulation.

Innovation Solution

A method and system for real-time estimation of ice quantity on an aircraft's surfaces, comparing it to predetermined thresholds, and activating deicing devices or alarm systems when thresholds are reached, using sensors to measure speed and liquid water content, allowing for timely operational adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If real-time ice formation monitoring is implemented, then operational safety and response time are improved, but device complexity and measurement precision requirements increase

Engineering Contradiction:
Improveoperational safetyVSAvoidmonitoring system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical ice detection systems with an algorithmic approach that processes sensor data (temperature, humidity, precipitation rate) through mathematical models to estimate ice accumulation. This substitutes direct mechanical measurement with computational estimation, reducing hardware complexity while maintaining monitoring capability.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediary computational model that processes raw sensor data and translates it into ice formation predictions. This intermediary layer (the algorithm) mediates between simple sensors and the complex task of ice monitoring, allowing basic sensors to provide accurate ice estimates through sophisticated data processing rather than requiring complex direct ice sensors.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Measurement precision

If direct ice measurement sensors are used, then measurement precision is improved, but device complexity and cost increase

Engineering Contradiction:
Improveice quantity detection accuracyVSAvoidsensor system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces direct physical ice sensors with an algorithmic estimation system that uses readily available atmospheric and flight data. Instead of attempting to directly measure ice accumulation through complex sensors, the system substitutes this with computational models that process temperature, humidity, and precipitation rate to predict ice formation, achieving measurement precision through information processing rather than physical measurement.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent creates a virtual copy of the ice accumulation state through algorithmic estimation. Rather than directly measuring the physical ice layer, the system generates a computational representation of ice quantity by processing related atmospheric parameters, effectively copying the ice state information from indirect measurements and flight data.

Inventive Principle:
Principle #26Copying

3Adaptability or versatility

If ice thresholds are set close to maximum certified limits, then operational flexibility is improved, but safety margin is reduced

Engineering Contradiction:
Improveoperational flexibilityVSAvoidsafety margin
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements continuous feedback monitoring where the estimated ice quantity is constantly compared against predefined thresholds. This feedback mechanism allows the system to provide real-time warnings and recommendations to pilots, enabling adaptive operational decisions that balance flexibility with safety based on current ice accumulation rates and aircraft conditions.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent establishes preliminary safety thresholds below the maximum certified ice limits before ice accumulation reaches dangerous levels. By setting these advance warning thresholds, the system enables preliminary corrective actions (such as activating deicing systems or adjusting flight plans) before the aircraft reaches its absolute safety limits, thereby maintaining both operational flexibility and safety margins.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS8684312B2Method and system for checking the formation of ice on an aircraft in flight
Publication Date: 2014.04.01 AIRBUS OPERATIONS (SAS)
  • US8684312B2 patent drawing
  • US8684312B2 patent drawing
  • US8684312B2 patent drawing

AI summary

The invention relates to a method for checking the formation of ice on an aircraft in flight, characterized in that the method comprises:the estimation (S4) in real time of a quantity of ice (SWC) forming on at least one zone of the aircraft according to flight conditions andthe comparison (S5) between the estimated quantity of ice (SWC) and a predetermined quantity of ice (SWCmax; SWCTHR).