Aircraft Time Synchronization via Interruption Signal Line
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Solution Overview
Problem
Aircraft systems face challenges in achieving accurate time synchronization between distributed communication modules due to system time differences and communication delays, leading to inaccurate data synchronization and motion control.
Innovation Solution
An aircraft time synchronization system and method that utilizes an interruption signal line to connect communication modules, allowing for the determination of communication and system time differences, enabling precise synchronization by correlating the receiving times of data and interruption signals to synchronize data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data transmission is performed between distributed communication modules via communication line, then data can be exchanged between modules, but communication delay occurs resulting in time desynchronization
Solution Approach 1:
The system performs preliminary time difference measurement by sending test data packets and interruption signals before actual data transmission. The second communication module calculates the communication time difference based on the time gap between receiving data and its corresponding interruption signal, then uses this pre-measured delay for time synchronization compensation during normal operation.
Solution Approach 2:
The system establishes a feedback mechanism where the second communication module continuously monitors the time difference between receiving data packets and their corresponding interruption signals. This measured time difference is fed back to adjust the synchronization timing, creating a closed-loop system that compensates for communication delays in real-time.
2Adaptability or versatility
If multiple devices operate in different operating systems, then device functionality is enhanced, but system time difference occurs in scheduling
Solution Approach 1:
The interruption signal acts as an intermediary reference that bridges different operating systems. Each communication module sends both data packets and interruption signals, and the receiving module uses the interruption signal as a common reference point to measure and compensate for time differences caused by different OS scheduling mechanisms.
Solution Approach 2:
The system dynamically adjusts time parameters by calculating communication time differences based on actual reception timing. Instead of using fixed time assumptions, the system measures the actual time gap between data packet reception and interruption signal reception, then applies this measured parameter for synchronization compensation.
Data Source
AI summary
The embodiments are an aircraft time synchronization system and method. The system comprises: a first communication module and a second communication module, wherein data transmission is performed between the first communication module and the second communication module via a communication line, and an I/O interface of the first communication module is connected to the I/O interface of the second communication module via an interruption signal line; the first communication module sends the data information to the second communication module via the communication line, and at the same time sends the triggered interruption signal to the second communication module via the interruption signal line; the second communication module performs time synchronization with the first communication module based on the communication time difference and system time difference with the first communication module determined according to the receiving time of the data information and interruption signal and the sending time.