Single-Axis Servo Drives With Dedicated Inter-Drive Coordination
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Solution Overview
Problem
In motion control systems with multiple single axis servo drives, the existing approach of using a master controller to monitor and calculate states for all motors increases processing demands, requiring significant computational resources within a servo update cycle, which can be inefficient.
Innovation Solution
A dedicated inter-drive network allows single axis servo drives to share and receive state information, enabling each servo drive to generate control signals based on the states of all motors, reducing the need for a master controller and distributing processing burdens across the drives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a master controller monitors and calculates states for all motors, then coordination between motors is achieved, but processing demands on the master controller increase significantly
Solution Approach 1:
The patent divides the control system into multiple independent single-axis servo drives, each capable of autonomous control. Instead of one master controller handling all calculations, each servo drive segment handles its own motor control independently while maintaining coordination through state information sharing, thus distributing the processing burden and reducing demands on any single controller.
2Device complexity
If multiple single axis servo drives are used instead of a multi-axis servo drive, then device complexity is reduced, but the master controller must perform additional monitoring and calculation functions
Solution Approach 1:
Each single-axis servo drive is designed to be self-sufficient, performing its own monitoring, state calculations, and control decisions without requiring a master controller to handle these functions. This self-service capability allows the system to maintain simpler device architecture while preserving control cycle efficiency, as each drive operates autonomously within the distributed network.
3Measurement precision
If a master controller performs all monitoring and calculations within a servo update cycle, then real-time control is maintained, but the update cycle becomes more demanding and slower
Solution Approach 1:
The control calculations are segmented and distributed across multiple independent servo drives rather than concentrated in a single master controller. Each drive performs its own state calculations and control decisions autonomously, eliminating the bottleneck of centralized processing and enabling faster, more efficient update cycles while maintaining precise real-time control timing.
Data Source
AI summary
A servo control module for a motion control system with a plurality of individual servo control modules. The servo control module includes a single axis servo drive. The servo control module further includes a set of input pins configured to receive motor state information of motors controlled by single axis servo drives of all of the other of the plurality of servo control modules over a dedicated inter-drive network each servo update cycle. The servo control module further includes a set of output pins configured to transmit the motor state information of a motor controlled by the single axis servo drive and the received state information over the inter-drive network of motors each servo update cycle.