Hardware Interlock Protocol for Unmanned Store Management Safety
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Solution Overview
Problem
Unmanned store management systems lack independent and analyzable interlocks for ensuring weapon safety and reliability, as they rely on complex and costly software-based control paths, which can be vulnerable to software transients and mis-delivery of commands.
Innovation Solution
Implementing a protocol with three independent control paths (RED, GREEN, and BLUE) that use hardware-based interlocks to synchronize and authenticate control messages, ensuring safe and reliable operation by preventing out-of-order command delivery and mitigating software hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If software-based control paths are used in unmanned SMS, then automation and remote control capability are improved, but reliability and safety are worsened due to vulnerability to software transients and command mis-delivery
Solution Approach 1:
The patent replaces software-based control with hardware-based interlock systems. Specifically, it implements hard-wired control paths with physical interlocks that prevent unauthorized weapon release, substituting the unreliable software control mechanism with a more reliable hardware-based safety system while maintaining remote control capability
Solution Approach 2:
The patent introduces an intermediary hardware interlock system between the ground station and unmanned SMS. This intermediary layer includes physical switches, relays, and interlock circuits that mediate the control signal transmission, ensuring that even if software fails, the hardware interlocks prevent unauthorized weapon release
2Device complexity
If a single hardware interlock is used for all weapon critical functions in unmanned SMS, then device complexity is reduced, but reliability is worsened due to lack of independent control paths
Solution Approach 1:
The patent segments the single hardware interlock into multiple independent control paths (at least two separate paths). Each path has its own hardware interlocks and control circuits, ensuring that a failure in one path does not compromise the other. This segmentation provides independent redundancy while maintaining manageable complexity
Solution Approach 2:
The patent applies different local qualities to different control paths, with each path having specialized hardware interlocks tailored to specific weapon critical functions. This allows each segment to be optimized for its specific function while maintaining overall system reliability through diversity of control paths
3Adaptability or versatility
If complex software-based control is used in unmanned SMS, then adaptability and control flexibility are improved, but ease of analysis and verification are worsened
Solution Approach 1:
The patent replaces complex software-based control with simpler hardware-based interlock systems that are inherently more analyzable. Hardware interlocks provide deterministic, predictable behavior that can be verified through physical inspection and electrical testing, unlike complex software control which requires extensive code analysis and testing
Data Source
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AI summary
A store management system (SMS) (114) is provided. The SMS includes a manned station including a master arm control message encoder (130), a first critical control message encoder (132), and a second critical control message encoder (134), an unmanned platform including a master arm control message decoder (174), a first critical control message decoder (176), and a second critical control message decoder (178), and a data link (112) between the manned station and the unmanned platform. The data link (112) is configured to transmit a master arm control message (160) from the master arm control message encoder to the master arm control message decoder, transmit a first critical control message (400) from the first critical control message encoder to the first critical control message decoder, and transmit a second critical control message (500) from the second critical control message encoder to the second critical control message decoder.