Tiltable Actuator Mounting for Aircraft Brake Deformation
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Solution Overview
Problem
Electromechanical aircraft brakes face deformation issues when applying braking force, leading to transverse forces on the actuator, which can damage the screw-and-nut system due to a rigid connection between the support and actuator.
Innovation Solution
The actuator is mounted on the support via a connection member allowing angular tilt, such as a ball joint or composite bearing, enabling the pusher to maintain perpendicular contact with the disks despite support deformation, thus reducing the risk of transverse forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the actuator is rigidly connected to the support, then the connection is strong and stable, but the actuator is subjected to transverse forces when the support deforms under braking load
Solution Approach 1:
The connection between the actuator and support is segmented into two functional parts: a rigid connection member that maintains structural strength, and a tilting mechanism that allows angular adjustment. This segmentation enables the system to simultaneously achieve strong connection and transverse force accommodation.
Solution Approach 2:
The connection member is designed with dynamic tilting capability, allowing it to adjust its angular position in response to support deformation. This dynamic adaptation eliminates transverse forces by maintaining the actuator's pusher perpendicular to the friction elements during braking operations.
2Device complexity
If the actuator is rigidly connected to the support, then the structure is simple, but the pusher cannot maintain perpendicular contact with the disks when the support deforms
Solution Approach 1:
The connection member incorporates a tilting mechanism that automatically adjusts the actuator's angular position to maintain perpendicular contact between the pusher and friction elements. This dynamic adjustment ensures manufacturing precision is maintained despite support deformation, without requiring overly complex active control systems.
Solution Approach 2:
The connection member acts as an intermediary element between the rigid support and the actuator, absorbing deformation through controlled tilting while maintaining the precise perpendicular relationship required for effective braking contact.
3Object-affected harmful factors
If the actuator is allowed to tilt angularly, then transverse forces are reduced, but the connection between the actuator and support becomes more complex
Solution Approach 1:
The connection system is segmented into the actuator, the tilting connection member, and the support, allowing the tilting function to be isolated to a specific component. This segmentation reduces overall system complexity by localizing the angular freedom mechanism to a dedicated connection member rather than requiring complex mechanisms throughout the entire actuator assembly.
4Stability of the object's composition
If the connection is rigid, then the actuator position is stable, but the actuator cannot accommodate support deformation during braking
Solution Approach 1:
The connection member provides conditional stability: it maintains a fixed rigid connection during normal operations for stability, but enables controlled angular tilting when support deformation occurs, providing adaptability. This dynamic behavior allows the system to switch between stable and adaptive modes based on operational conditions.
Solution Approach 2:
The connection member changes its effective stiffness parameter in response to deformation conditions. During normal operation, it maintains a rigid stable connection; when support deformation occurs, it transitions to a more compliant state allowing angular adjustment, thus accommodating deformation while maintaining actuator functionality.
Data Source
AI summary
The invention relates to an electromechanical brake, in particular for aircraft, the brake comprising a support carrying at least one electromechanical actuator comprising a pusher that is axially displaceable towards friction elements in order to apply a braking force to the friction elements, selectively, wherein the actuator is mounted on the support via a connection member allowing at least a portion of the actuator carrying the pusher to tilt angularly.