Multi-Channel Controller Logic for Seamless Failover
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Solution Overview
Problem
Existing electronic control systems with multi-channel primary and backup controllers face challenges in seamless failover and fault detection, particularly in scenarios where primary controllers experience partial or complete failures, leading to potential device instability and loss of control.
Innovation Solution
A multi-channel controller architecture with dual primary and backup control microprocessors connected via cross-channel and local health signals, utilizing latching Boolean gates and logic circuits to ensure redundant control and prevent simultaneous control attempts, enabling smooth switchover and fault detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple primary controllers are used to control a device, then control reliability is improved, but the risk of simultaneous control attempts and system instability increases
Solution Approach 1:
The patent implements a feedback mechanism where controllers continuously monitor the control bus for presence signals from other controllers. Each controller transmits and detects signals to determine whether other controllers are active, creating a closed-loop feedback system that prevents simultaneous control attempts by allowing only one controller to remain active at any given time
Solution Approach 2:
The control bus serves as an intermediary communication medium between controllers. It facilitates the exchange of presence signals and coordination information, enabling controllers to negotiate and establish a hierarchical control structure where one controller assumes primary control while others transition to standby or inactive states
2Reliability
If backup controllers are implemented for failover, then system stability is improved, but fault detection capability and switchover smoothness become critical challenges
Solution Approach 1:
The system performs preliminary health assessments and capability evaluations of backup controllers before failover is needed. Controllers continuously monitor each other's status through the control bus, pre-identifying viable backup candidates and preparing switchover protocols in advance, so that when a fault occurs, the transition can execute smoothly without delay or instability
3Reliability
If control channels are added for redundancy, then failover capability is improved, but controller complexity and coordination requirements increase
Solution Approach 1:
The patent merges the control functions of multiple controllers into a unified control architecture where all controllers share a common control bus and follow standardized communication protocols. This consolidation reduces individual controller complexity by distributing coordination responsibilities across the network and using uniform signal formats, making the system easier to manage despite having multiple redundant channels
Data Source
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AI summary
A multi-channel control system includes at least a first primary control microprocessor and a second primary control microprocessor operable to control a device, and at least a first secondary control microprocessor and a second secondary control microprocessor operable to control the device. Each of the first and second primary control microprocessors and the first a second secondary control microprocessors are arranged as an independent control channel.