Control System Time Error Correction
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Solution Overview
Problem
Control systems that rely on global time synchronization face operational inconsistencies and increased overhead due to deviations between global and local time, leading to potential failures in communication transfer devices and information processing devices.
Innovation Solution
A control system architecture that includes management units for global and local time, error detection mechanisms to calculate and correct time discrepancies, and orchestration devices to adjust operation control information based on time error information, ensuring consistent operation across devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control devices operate based on global time synchronization, then time management uniformity and processing switching efficiency are improved, but system overhead increases
Solution Approach 1:
The system dynamically switches between global time-based processing switching and local time-based operation. Control devices generate local time continuously while only synchronizing with global time for processing switching decisions, allowing flexible adaptation between the two time bases to reduce overhead while maintaining efficiency.
Solution Approach 2:
Instead of continuously operating based on global time (excessive action), the system operates based on local time for most functions and only references global time for processing switching. This partial application of global time synchronization reduces the overhead burden while maintaining the benefits of coordinated processing.
2Loss of energy
If control devices operate with local time instead of global time, then system overhead is reduced, but operational consistency deteriorates when time deviations occur
Solution Approach 1:
The system continuously monitors time deviations between local and global time bases and uses this feedback information to adjust processing switching decisions. When time deviations exceed thresholds, the system modifies its operation to maintain consistency, ensuring reliable operation despite the reduced overhead of local time-based processing.
Solution Approach 2:
The system changes operational parameters based on time deviation conditions. When time synchronization is within acceptable ranges, the system operates with local time for reduced overhead. When deviations occur, the system adjusts parameters to reference global time, ensuring operational consistency is maintained through parameter adaptation rather than fixed time base usage.
3Stability of the object's composition
If processing switching is performed based on global time, then coordinated operation across devices is improved, but time synchronization precision requirements increase
Solution Approach 1:
The system segments time-based operations into two distinct modes: local time-based continuous operation and global time-based processing switching. This segmentation allows coordinated operation to occur only when needed for processing switching, rather than requiring continuous precise synchronization, thereby reducing the overall precision requirements while maintaining coordination benefits.
Data Source
AI summary
According to one embodiment, a control system includes first and second control devices. The first control device includes a management unit that manages global time, a first generation unit that generates local time, a control unit that controls an operation of the first control device based on the global time, the local time, and operation control information, and a second generation unit that generates time error information based on the global time and the local time. The second control device includes an acquisition unit that acquires the time error information, and a correction unit that corrects the operation control information based on the time error information.