Aviation Actuator Layout With Separated Partial Drives
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Solution Overview
Problem
Current actuators in aviation, particularly for rotor blade adjustments, are susceptible to damage and failure, which can lead to catastrophic consequences due to the interconnected nature of their components, such as in the case of a fire affecting multiple partial drives within a shared motor housing.
Innovation Solution
The actuator design features partial drives that can operate independently, with a gearbox physically separating them to reduce damage propagation, and includes multiple generators, rectifiers, power control units, and actuator control units, along with a separating clutch to ensure continued functionality even if one partial drive is blocked, and uses electric motors with multiple phases and alternating winding arrangements for enhanced redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple partial drives are combined in one housing, then device complexity is reduced, but susceptibility to damage increases due to fire propagation affecting multiple partial drives
Solution Approach 1:
The actuator is divided into multiple independent partial drives (first partial drive and second partial drive) that are physically separated by the gearbox. This segmentation allows each partial drive to operate independently and prevents fire or damage from propagating between them, thereby improving reliability while maintaining manageable device complexity through modular architecture.
Solution Approach 2:
The gearbox serves as a physical intermediary barrier between the first and second partial drives. This intermediate component not only performs its mechanical function but also acts as a fire barrier and isolation structure, preventing direct contact between the partial drives and reducing damage propagation in case of failure.
2Reliability
If partial drives are physically separated by a gearbox, then damage propagation is reduced, but device complexity increases
Solution Approach 1:
The actuator is divided into multiple independent partial drives (first partial drive and second partial drive) that are physically separated by the gearbox. This segmentation allows each partial drive to operate independently and prevents fire or damage from propagating between them, thereby improving reliability while maintaining manageable device complexity through modular architecture.
Solution Approach 2:
The gearbox serves multiple functions: it performs mechanical gear transmission between the partial drives and simultaneously acts as a physical barrier for fire protection and isolation. This multi-functionality reduces the need for additional separate protective structures, thereby limiting the increase in device complexity.
3Reliability
If redundant systems with multiple generators and control units are implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The control system is segmented into multiple independent control units (first actuator control unit and second actuator control unit), each associated with specific partial drives. This segmentation enables independent control and monitoring of each drive unit, improving reliability through redundancy while maintaining manageable system complexity through modular control architecture.
Solution Approach 2:
Each partial drive is equipped with its own generator and control unit, enabling self-sufficiency and independent operation. This self-service capability ensures that each module can function autonomously, providing redundancy without requiring complex centralized control systems.
4Reliability
If alternating winding arrangements with multiple phases are used, then reliability is improved through redundancy, but manufacturing precision requirements increase
Solution Approach 1:
The electrical system is divided into multiple independent phases and windings within each partial drive. This segmentation creates redundant electrical pathways that can operate independently, improving reliability while allowing for standardized manufacturing processes that can accommodate the required precision through modular assembly.
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 design significantly reduces the actuator's susceptibility to damage, ensuring high reliability and maintaining control functions even in the event of component failures, such as those caused by fire, by physically and electrically isolating partial drives and providing redundant systems.
Implementation Method 1
each of which has a downstream rectifier
Implementation Method 2
electromechanical drive unit, which is divided into partial drives that can be operated independently from one another
Data Source
AI summary
An actuator for aviation may include an electromechanical drive unit connected with an output drive via a gearbox. The drive unit may have at least two partial drives that can be operated independently from one another. The gearbox may be located at least partially between the at least two partial drives such that the at least two partial drives are spaced apart from one another.