Adaptive Ice Protection Parting Strip with Directional Heating
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Solution Overview
Problem
Conventional aircraft electrothermal ice protection systems (IPS) do not optimize power consumption as they uniformly heat parting strips regardless of the actual location of ice accumulation, leading to inefficient ice removal.
Innovation Solution
An electrothermal IPS with a sensor and controller system that monitors airflow direction and selectively activates targeted heating sections of a parting strip assembly, optimizing power distribution based on airflow dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform heating is applied to the entire parting strip, then ice protection coverage is ensured, but power consumption increases and efficiency decreases
Solution Approach 1:
The parting strip is divided into multiple independently controllable heating sections along its length. Each section can be selectively activated based on the detected ice accumulation location, allowing the system to provide targeted heating only where needed rather than uniformly heating the entire strip.
Solution Approach 2:
The system implements differential heating by applying different power levels to different sections of the parting strip based on local ice conditions. The controller adjusts the heating intensity and distribution to match the actual ice accumulation pattern, ensuring adequate protection at ice-prone areas while reducing or eliminating heating in ice-free areas.
2Reliability
If the entire parting strip is heated, then comprehensive ice removal is achieved, but power distribution efficiency deteriorates
Solution Approach 1:
The heating system transitions from a static uniform heating mode to a dynamic adaptive heating mode. The controller continuously monitors ice accumulation conditions and adjusts the power distribution to each heating section in real-time, optimizing energy utilization based on changing flight conditions and ice formation patterns.
Solution Approach 2:
The system employs sensor feedback to detect ice accumulation location and intensity, which informs the controller's decisions on power distribution. This closed-loop control ensures that heating power is dynamically adjusted to match actual ice conditions, preventing energy waste on areas that do not require heating while ensuring adequate power delivery to ice-affected areas.
3Use of energy by moving object
If selective heating sections are activated based on airflow direction, then power consumption is reduced, but system complexity increases
Solution Approach 1:
The sensor system serves multiple functions: it detects airflow direction, determines ice accumulation likelihood, and provides input for controller decision-making. This multi-functionality reduces the need for separate dedicated sensors for each detection task, thereby limiting the increase in system complexity while enabling selective heating activation.
Solution Approach 2:
The system uses naturally occurring airflow patterns over the wing to inform heating decisions, rather than requiring complex active sensing systems. The airflow direction itself serves as the primary indicator for ice accumulation risk, allowing the system to self-regulate heating activation based on aerodynamic conditions without excessive external control inputs.
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
This approach allows for efficient heating of only the necessary areas, reducing overall power consumption and enhancing ice shedding performance while maintaining effective ice protection.
Implementation Method 1
The sensor monitors a direction of a local incident airflow that is imparted on the sensor
Implementation Method 2
The parting strips can be heated in response to receiving electrical current
Implementation Method 3
electrothermal ice protection system (IPS), which utilizes one or more high-watt density parting strips
Implementation Method 4
The controller determines a direction of surface airflow incident on a critical surface of the aircraft based on the local incident airflow and selectively concentrates power to at least one targeted heating section among the plurality of heating sections
Implementation Method 5
By removing the ice at the targeted location, aerodynamic forces realized by the critical surface during aircraft flight assists to remove or 'shed' remaining portions of accumulated ice from locations of the critical surface farther aft
Data Source
AI summary
An electrothermal ice protection system (IPS) installed on an aircraft includes a sensor, a parting strip assembly, and a controller. The sensor monitors a direction of a local incident airflow that is imparted on the sensor. The parting strip assembly is coupled to the critical surface and includes a plurality of heating sections. The controller is in signal communication with the sensor and the parting strip assembly. The controller determines a direction of surface airflow incident on a critical surface of the aircraft based on the local incident airflow and selectively concentrates power to at least one targeted heating section among the plurality of heating sections with respect to non-targeted heating sections among the plurality of heating sections based on the direction of the surface airflow.