Redundant Control System Segmentation for Reliability
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Solution Overview
Problem
Existing multiple redundant control systems for controlled objects become complex when adding redundancy, which can affect overall system reliability if failures occur.
Innovation Solution
A multiple redundant control system with interconnected control systems that share information and failure detection capabilities, using a CCDL (cross channel data link) to communicate electrical signals and generate a main control signal based on the status of individual control systems, ensuring continuous operation even with failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a controller is provided to detect which control signal is more appropriate in a dual control system, then reliability is improved through redundancy, but device complexity increases
Solution Approach 1:
The control system is segmented into multiple independent control channels, each capable of autonomous failure detection. Instead of one complex controller evaluating all signals, the detection function is divided and distributed across each control channel, simplifying the overall configuration while maintaining reliability through redundancy
Solution Approach 2:
Each control system is equipped with its own failure detection capability, allowing it to autonomously determine its operational status without requiring another controller to evaluate its signals. This self-service approach eliminates the need for a separate evaluation controller, reducing system complexity while preserving the redundancy benefit
Data Source
AI summary
In a multiple redundant control system each of the control systems detects whether failures occur in the system itself and the other systems, and outputs a control signal corresponding to an amount of control of a controlled object by the control system on the basis of the result of failure detection. In the multiple redundant control system at least one controlled object is driven or controlled by a controller having a plurality of control systems that are connected to each other and each output information regarding the system itself and received input of information regarding other systems. Based on control signals, a main control signal for driving or controlling the controlled object is generated by a main control signal generator.