Driven Shaft Synchronization Control for Stepwise Speed Changes
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Solution Overview
Problem
Existing synchronization control technologies fail to effectively suppress vibrations in driven shafts when the speed of the main shaft changes in a stepwise manner during operation, leading to mechanical impacts and vibrations in the driven shaft.
Innovation Solution
A control device that acquires the speed of the main shaft, selects and switches characteristic data to adjust the speed command value for the driven shaft based on the main shaft's speed changes, ensuring a suitable speed command is output to the driven shaft, thereby reducing vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the speed of the main shaft changes in a stepwise manner during operation, then the operational flexibility and responsiveness are improved, but mechanical impacts and vibrations occur in the driven shaft
Solution Approach 1:
The control device detects stepwise speed changes of the main shaft in advance and preliminarily adjusts the speed command value for the driven shaft before the impact occurs. By predicting the speed change and proactively modifying the command value, the system prevents mechanical impacts rather than reacting after they occur.
Solution Approach 2:
The control device changes the speed command value parameter of the driven shaft in response to detected speed changes in the main shaft. By dynamically adjusting this parameter based on main shaft behavior, the system maintains smooth operation and prevents vibrations caused by abrupt speed transitions.
2Object-affected harmful factors
If the speed command value is adjusted in response to main shaft speed changes, then vibrations are suppressed, but control complexity increases
Solution Approach 1:
The control device continuously monitors the speed of the main shaft and uses this feedback information to automatically adjust the speed command value for the driven shaft. This closed-loop feedback mechanism enables vibration suppression through real-time adaptation without requiring complex predictive models or artificial intelligence algorithms.
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
In this control device (60): during synchronised operation, in which the operation of a driven shaft (551, 651) is synchronised with the operation of a main shaft (501, 601), a speed is calculated as a driven-shaft speed command value by multiplying the acquired speed of the main shaft by a specified ratio; before the driven shaft reaches a position in which synchronised operation begins, a movement amount of the driven shaft is identified on the basis of the position of the main shaft, which is calculated from the acquired speed of the main shaft, and selected characteristic data, and a speed, which is identified on the basis of said movement amount, is calculated as the driven-shaft speed command value; and when the speed of the main shaft changes in a stepwise manner during operation of the main shaft and the driven shaft, other characteristic data corresponding to the speed change of the main shaft is identified from among a plurality of stored pieces of characteristic data, and the selected characteristic data is switched to said other characteristic data.