Control Device Synchronizing Axes via Delay Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motion control systems face synchronization lag due to delays in information transmission and processing between axes, which is not adequately addressed by current methods.
Innovation Solution
A control device with a processor that computes and corrects position commands for a second axis using position information from a first axis to compensate for transmission and processing delays, thereby synchronizing the axes effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If position information is transmitted from the first axis to the second axis for motion control synchronization, then the second axis can be controlled to follow the first axis, but a synchronization lag occurs due to transmission and processing delays
Solution Approach 1:
The patent applies preliminary action by calculating and storing the delay amounts (T2 and T4) in advance through measurement processes, and then using these pre-determined delay values to correct position commands before they are executed. This allows the system to compensate for transmission and processing delays proactively rather than reactively, improving synchronization accuracy while accounting for the inherent time delays in the system.
2Measurement precision
If the measurement precision of the first axis position is increased to improve synchronization accuracy, then the position information becomes more accurate, but the processing time increases causing greater delay
Solution Approach 1:
The system performs preliminary measurement of delay amounts T2 (processing delay in control device) and T4 (response delay in second axis system) during setup or calibration phases. These pre-measured delay values are then stored and reused for correcting position commands during normal operation, avoiding the need to perform complex measurements during real-time control, thus maintaining high measurement precision without adding processing time delays.
Data Source
AI summary
A control device is configured to synchronize a second axis with a (real or virtual) first axis. The control device includes a processor configured to use position information for the first axis to compute a position command for the second axis, and to correct the position command when outputting a position command to the second axis to compensate for a delay caused by the transmission of the position command from the control device to the second axis, and a delay on the second axis.