Clock-Synchronized Control for Mixed-Protocol Mechanisms
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Solution Overview
Problem
Existing control systems struggle to synchronize multiple mechanisms controlled by a common device, particularly when different communication schemes are used for command value transmission, leading to inaccuracies and deviations in control timing.
Innovation Solution
A control system that includes a computing unit to calculate command values, a signal output unit to output control signals based on a control period signal, a communication unit to transmit frames with command values in a communication scheme using a clock signal, a measurement unit to measure the timing of frame transmission, and an adjustment unit to adjust the clock signal period length based on the measured timing, ensuring synchronization across mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different communication schemes are used for transmitting command values to multiple mechanisms, then communication flexibility and adaptability are improved, but synchronization accuracy and control timing precision deteriorate
Solution Approach 1:
A clock signal serves as an intermediary reference that mediates between different communication schemes. The measurement unit measures the timing of frame transmission relative to this common clock signal, and the adjustment unit adjusts the clock signal period to synchronize transmission timing across different communication protocols, thereby maintaining synchronization accuracy while supporting communication flexibility
Solution Approach 2:
The adjustment unit dynamically changes the period parameter of the clock signal to compensate for timing differences between different communication schemes. By adjusting the clock signal period based on measured transmission timing, the system achieves precise synchronization while accommodating various communication protocols with different timing characteristics
2Ease of operation
If the timing of frame transmission is not adjusted, then communication simplicity is maintained, but control timing synchronization and accuracy deteriorate
Solution Approach 1:
The system performs self-adjustment by automatically measuring the transmission timing of frames and adjusting the clock signal period without requiring external intervention. The measurement unit and adjustment unit work together to autonomously synchronize transmission timing, maintaining communication simplicity while achieving precise control timing accuracy
3Measurement precision
If the clock signal period is adjusted to synchronize transmission timing, then synchronization accuracy is improved, but system complexity and measurement requirements increase
Solution Approach 1:
The clock signal serves multiple functions: it acts as a timing reference for transmission, a measurement基准 for timing deviation detection, and an adjustment target for synchronization. This multi-functionality reduces the need for separate synchronization mechanisms, thereby limiting the increase in system complexity while achieving high transmission timing accuracy
Data Source
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AI summary
A control system includes a computing unit that executes an application program to calculate a first command value and a second command value, a signal output unit that outputs a control signal including the first command value in accordance with a control period signal that indicates a synchronization reference, a communication unit that transmits in accordance with the control period signal, a frame including the second command value in a communication scheme in which a clock signal is directly or indirectly used, a measurement unit that measures a time period that indicates timing of start of transmission of the frame, from the synchronization reference indicated by the control period signal, and an adjustment unit that adjusts a period length of at least a part of the clock signal based on the measured time period.