Electric Thrust Reverser Actuation via Dynamic Pressure Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing thrust reverser systems rely on hydraulic or pneumatic actuators, which are maintenance-intensive, heavy, and prone to premature fatigue due to constant high power operation, especially during heavily loaded scenarios, leading to increased risk of jamming and component deformation.
Innovation Solution
A control method using electric motors that analyzes turbojet stream pressure parameters to adapt operating sequences, delivering only necessary power for opening or closing the thrust reverser, reducing the likelihood of high-power shocks and allowing for lighter, more reliable components by limiting torque and speed according to turbojet speed conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydraulic or pneumatic actuators are used to actuate moving covers, then the thrust reverser can be opened or closed, but the system requires a pressurized-fluid transport network that is maintenance-intensive and prone to leaks
Solution Approach 1:
The patent replaces hydraulic or pneumatic actuators with electric motors to actuate the moving covers. This substitution eliminates the need for pressurized-fluid transport networks, reducing maintenance requirements and leakage risks while maintaining the ability to open or close the thrust reverser effectively.
Solution Approach 2:
The patent eliminates the use of hydraulic or pneumatic systems by adopting electromechanical actuators. This removes the pressurized-fluid transport network entirely, addressing the maintenance and reliability issues associated with fluid leakage in such systems.
2Reliability
If actuators deliver maximum power designed for heavily loaded scenarios, then the reverser can be opened or closed under high turbojet speed conditions, but the loads exerted on structures and equipments are always the highest loads leading to premature fatigue wear
Solution Approach 1:
The patent implements dynamic power delivery through electric motors that adjust torque and speed based on real-time turbojet stream pressure conditions. The control method analyzes pressure parameters and adapts operating sequences, delivering only the necessary power for current conditions rather than constant maximum power, thereby reducing fatigue wear while ensuring adequate performance in heavily loaded scenarios.
Solution Approach 2:
The patent changes the operating parameters (torque, speed, power) of the electric motors based on analyzed turbojet stream pressure parameters. By adapting power delivery to actual operational conditions rather than maintaining fixed maximum settings, the system reduces unnecessary high loads on components while ensuring sufficient power availability when needed.
3Weight of moving object
If electric motors are used to actuate moving covers, then the system is lighter and more reliable, but the motors must still be capable of operating under heavily laden scenarios requiring great motive power
Solution Approach 1:
The patent uses electric motors with dynamic control capabilities that can deliver high power when needed (during heavily laden scenarios) but operate at lower power levels during normal conditions. This dynamic power adjustment allows the use of lighter motors compared to those that would be required to continuously deliver maximum power, while still meeting the peak power requirements for safety-critical operations.
Solution Approach 2:
The patent enables the electric motors to change their operating parameters (torque, speed, power output) based on real-time analysis of turbojet stream pressure. This allows the motors to be sized for peak requirements while operating at fraction of maximum capacity during normal conditions, achieving weight reduction without compromising the ability to handle heavily laden scenarios.
4Force
If full power is delivered each time the reverser is used, then the reverser can overcome strong depression and opposing aerodynamic forces, but the probability of component jamming increases due to high dynamic and static loads
Solution Approach 1:
The patent changes the power delivery parameters of the electric motors based on analyzed turbojet stream pressure conditions. By delivering appropriate power levels matched to actual operational needs rather than constant full power, the system overcomes necessary forces while reducing the probability of component jamming caused by excessive dynamic and static loads.
Solution Approach 2:
The patent implements a feedback control system that analyzes turbojet stream pressure parameters and adjusts motor power delivery accordingly. This feedback mechanism ensures sufficient force is applied to overcome jet depression and aerodynamic opposition while avoiding excessive power delivery that could cause component jamming, thereby improving overall system reliability.
Data Source
AI summary
The invention relates to a control method for opening or closing a turbojet engine thrust reverser (1) by using at least one mobile cowl (2) displaceable by means of at least one electric motor (7) consisting in analyzing at least one parameter representative for a pressure in the turbojet engine jet and in carrying out an operating sequence in which the operating parameters of the electric motor (7) are adjusted to a situation.