Distributed Redundant Control for Signal Processing Failover
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Solution Overview
Problem
Redundant systems with centralized control modules are prone to total failure due to the single point of failure associated with the centralized control module, leading to a higher risk of system failure.
Innovation Solution
A redundant system design where N+1 devices, including N operational devices and one reserve device, are interconnected with system control integrated within one of the devices, allowing for decentralized control and switching operations to reroute signals in case of device failure, eliminating the need for a centralized control module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a centralized control module is used to monitor and control devices, then the system can be managed efficiently, but the system becomes vulnerable to total failure due to single point of failure
Solution Approach 1:
The centralized control module is segmented and distributed into individual devices. Each device receives control signals from the control unit and can independently execute control operations, eliminating the single point of failure while maintaining centralized coordination capabilities through the communication bus.
Solution Approach 2:
A communication bus serves as an intermediary between the control unit and individual devices. The control unit sends control signals through the communication bus to devices, which then execute operations independently, mediating between centralized control and distributed execution.
2Reliability
If each operational device has its own reserve device, then system reliability is improved, but the cost and device complexity increase significantly
Solution Approach 1:
The reserve device is designed with multi-functionality to serve multiple operational devices. It can be dynamically assigned to replace any failed operational device through the communication bus and control unit, eliminating the need for dedicated reserve devices for each operational device while maintaining reliability.
Solution Approach 2:
The system implements dynamic assignment of the reserve device to operational devices based on real-time status. The control unit monitors device health and dynamically reconfigures the system to activate the reserve device when needed, providing adaptive reliability without fixed one-to-one reservations.
3Device complexity
If a centralized control module is implemented, then control functionality is consolidated, but the system loses redundancy in control capabilities
Solution Approach 1:
Control functionality is segmented between the central control unit and individual devices. The control unit provides high-level coordination while devices execute control operations independently, creating redundant control paths that maintain simplicity while improving reliability.
Solution Approach 2:
Individual devices are equipped with local control capabilities to execute operations independently when receiving control signals. This local quality enables distributed control execution while maintaining overall system coordination, providing redundancy without sacrificing structural simplicity.
Data Source
AI summary
A redundant system for processing at least one signal is described wherein the redundant system has N+1 devices include N operational devices and one reserve device. The N operational devices and the reserve device are interconnected with each other. The redundant system includes a system control integrated within one of the devices of the redundant system. The redundant system further includes switches that are associated with the operational devices. In case of a failure of a respective operational device, the system control is configured to cause at least one of the devices to operate the switch associated with the respective operational device having the failure. Further, a method of operating a redundant system for processing at least one signal is described.