Data Modifying Bus Buffer for MIL-STD-1553 Adaptability
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Solution Overview
Problem
The integration of new peripheral devices onto existing MIL-STD-1553 databuses in military aircraft requires extensive regression testing to maintain operational flight plan functionality, which is cumbersome and costly.
Innovation Solution
A data modifying bus buffer with a switch controlled by a buffer controller that selectively couples and modifies data signals between databuses, allowing for automatic modification of messages, such as roll angle information, without altering the operational flight plan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If new peripheral devices are added to an existing MIL-STD-1553 databus, then the functionality and utility of the databus are enhanced, but extensive regression testing is required to ensure operational flight plan functionality is not adversely affected
Solution Approach 1:
A bus buffer is introduced as an intermediary device between the mission computer and peripheral devices on the MIL-STD-1553 databus. The bus buffer includes a message modifier that automatically modifies messages without requiring changes to the operational flight plan, thereby enabling easy addition of new peripheral devices while avoiding the need for extensive regression testing.
2Adaptability or versatility
If new peripheral devices are added to enhance databus utility, then the adaptability of the system is improved, but the complexity of ensuring operational flight plan compatibility increases
Solution Approach 1:
The bus buffer acts as a mediator that handles message modification automatically. It includes a message modifier component that intercepts and modifies messages between the mission computer and peripheral devices, thereby enhancing databus utility without increasing the complexity of the operational flight plan.
Solution Approach 2:
The bus buffer performs self-service by automatically modifying messages according to predefined rules. The message modifier component autonomously handles message format adjustments and data transformations without requiring manual intervention or changes to the operational flight plan, thereby reducing system complexity.
3Adaptability or versatility
If message modification is implemented to support new peripheral devices, then the versatility of the databus is improved, but the risk of adversely affecting operational flight plan functionality increases
Solution Approach 1:
The bus buffer serves as a safe intermediary that isolates message modification operations from the operational flight plan. The message modifier component carefully transforms messages while preserving critical operational data, thereby improving peripheral device compatibility without compromising the reliability of operational flight plan functionality.
Solution Approach 2:
The bus buffer performs preliminary message modification before messages reach peripheral devices. By pre-processing and validating modified messages, the system ensures compatibility with new devices while maintaining operational flight plan integrity, thereby reducing the risk of functionality adverse effects.
Data Source
AI summary
According to one embodiment of the invention, a data modifying bus buffer generally includes a switch that is configured to selectively couple a first databus to a second databus. The switch is controlled by a buffer controller. The first databus and a second databus have a similar predetermined protocol. The buffer controller is operable to monitor the first databus for the presence of a particular sequence of the signals such that, when the particular sequence of the signals is found, the first switch may be selectively opened or closed.