Modular Signal Interface Unit for Aircraft Subsystems
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Solution Overview
Problem
Aircraft electronic systems require costly and specific signal interface units (SIUs) for each aircraft, limiting the reuse of components and increasing maintenance costs due to their unique design for single tasks.
Innovation Solution
A modular signal interface unit (SIU) that can interface with various aircraft subsystem modules through multiple communication links and power supply, allowing for easy removal, replacement, and redundancy, using a triplex time-deterministic communication link for data integrity and a generic interface to connect with aircraft data buses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unique SIUs are implemented for each aircraft, then system reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent implements a universal SIU design that can be used across multiple aircraft platforms. The SIU incorporates a standardized interface unit with generic communication protocols and configurable parameters, allowing the same hardware design to serve different aircraft types without requiring custom manufacturing for each platform, thereby reducing per-unit costs while maintaining reliability standards
2Adaptability or versatility
If aircraft-specific SIUs are used, then system adaptability is improved, but device complexity increases
Solution Approach 1:
The SIU incorporates dynamic configurability through software-defined communication protocols and programmable interface parameters. The device can adapt its behavior and communication characteristics based on the specific aircraft subsystem it interfaces with, providing high adaptability without requiring hardware complexity for each configuration scenario
3Ease of repair
If modular SIU design is implemented, then ease of repair is improved, but device complexity increases
Solution Approach 1:
The SIU is designed as a modular unit with distinct functional segments including communication interfaces, power management, and subsystem control. Each module can be independently tested, replaced, or repaired without affecting other components, significantly reducing maintenance complexity and downtime despite the overall system's functional sophistication
Data Source
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AI summary
A signal interface unit 12 for use on an aircraft includes a microcontroller, at least one connector 18a-18n, and first and second communication links 50, 52. The first communication link 50 is connected between the microcontroller and the at least one connector 18a-18n. The microcontroller is configured to transmit and receive data on the first communication link 50. The second communication link 52 is connected to the microcontroller. The microcontroller is configured to send and receive data on an aircraft data bus using the second communication link 52.