Dual Control Unit Architecture for Vehicle Network Failover
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Solution Overview
Problem
Current vehicle control systems lack sufficient redundancy, particularly in safety-critical subsystems like braking and steering, which can lead to system failures and degradation of vehicle functionality if individual control units or communication networks fail.
Innovation Solution
A control architecture with two control units connected through an interlink communication line, allowing for data transmission and mode switching between them, enabling one unit to take over if the other fails, and ensuring continued operation even if communication networks fail, with either unit capable of acting as a master or slave based on an algorithmic determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single control unit is used for vehicle subsystem control, then the device complexity is reduced, but the system reliability deteriorates due to lack of redundancy
Solution Approach 1:
The control system is segmented into multiple independent control units (first control unit and second control unit), each capable of independently controlling vehicle subsystems. This segmentation provides redundancy so that if one control unit fails, the other can take over, thereby improving system reliability while maintaining manageable complexity through modular design
Solution Approach 2:
Different control units are assigned different communication network connections (first control unit connected to first vehicle communication network, second control unit connected to second vehicle communication network), creating local quality differences that enhance system reliability through diversified failure modes while keeping each local connection simple
2Reliability
If redundant control units and communication networks are implemented, then the system reliability is improved, but the device complexity increases
Solution Approach 1:
The first and second control units are merged into a single control system architecture that works together to control vehicle subsystems. They can operate in coordination or take over from each other, providing redundancy without requiring completely separate independent systems, thus improving reliability while controlling overall architecture complexity
Solution Approach 2:
Both control units are designed with universal functionality to perform the same control tasks for vehicle subsystems. Either control unit can independently execute all necessary control functions, allowing the system to maintain full functionality even when one unit fails, improving reliability without needing specialized redundant components
3Adaptability or versatility
If cross-network data transmission is enabled through interlink communication line, then the system adaptability is improved, but the device complexity increases
Solution Approach 1:
An interlink communication line is introduced as an intermediary component that enables data transmission between the first and second control units across different communication networks. This intermediary provides the necessary adaptability for cross-network communication while isolating the complexity within a dedicated communication channel rather than requiring complex multi-network integration logic
Data Source
AI summary
A control architecture for a vehicle connects a first control unit to a first vehicle communication network. A second control unit is connected to a second vehicle communication network. Commands are received by a plurality of commanded units from the first control unit and/or the second control unit over communication lines. An interlink communication line is connected between the first control unit to the second control unit.