Servo Gain Estimation Across Motion and Motor Control Loops
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Solution Overview
Problem
Existing servo motor systems struggle to adjust control parameters effectively across separate motion control systems and low-order systems, leading to inefficiencies and difficulties in achieving higher response and efficiency.
Innovation Solution
A motor control apparatus that includes a control gain estimator capable of estimating the control gain of a motion control system, allowing for the adjustment of control parameters in both the motion control system and the low-order system, even when they are separately managed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If control parameters are adjusted only within the low-order system (servo amplifier), then the servo amplifier can be independently managed and operated, but control parameters of the motion control system cannot be adjusted and manual adjustment is required
Solution Approach 1:
The patent introduces a control parameter adjustment mechanism that acts as an intermediary between the motion control system and the low-order system. The servo amplifier estimates control parameters of the motion control system based on its own operating data, enabling indirect adjustment of higher-level control parameters without direct access or management authority. This intermediary approach allows parameter tuning across system boundaries while maintaining separate management structures.
Solution Approach 2:
The patent implements a feedback mechanism where the servo amplifier continuously monitors its own operation data (current, speed, position) and uses this information to estimate control parameters of the motion control system. This feedback loop enables automatic parameter estimation and adjustment based on actual system performance, reducing the need for manual intervention and enabling dynamic optimization of control parameters across both systems.
2Measurement precision
If control parameters are manually adjusted to eliminate mismatch in unit systems, then accuracy can be maintained, but efficiency is reduced due to time-consuming manual adjustments
Solution Approach 1:
The patent enables the servo amplifier to automatically estimate and adjust control parameters of the motion control system based on its own operation data. This self-service capability eliminates the need for external manual intervention in parameter adjustment, allowing the system to autonomously adapt to unit system differences and optimize control parameters. The automatic estimation process maintains precision while dramatically improving adjustment efficiency.
Solution Approach 2:
The patent replaces manual mechanical adjustment processes with automated computational estimation. Instead of requiring operators to manually calculate and adjust control parameters based on unit system conversions, the system uses algorithms to automatically estimate parameters from operation data. This substitution of manual mechanics with automated computation maintains accuracy while eliminating time-consuming manual procedures.
3Reliability
If expertise and experience are required for fitting control parameters, then optimal performance can be achieved, but the process becomes complex and time-consuming even for experts
Solution Approach 1:
The patent enables automatic self-adjustment of control parameters through the servo amplifier's estimation capability. The system automatically analyzes its own operation data and adjusts control parameters without requiring external expertise or manual intervention. This self-service approach eliminates the time-consuming parameter fitting process while maintaining optimal performance through data-driven automatic optimization.
Solution Approach 2:
The patent implements continuous feedback-based parameter optimization where the servo amplifier monitors operation data and automatically adjusts control parameters based on actual system performance. This feedback mechanism replaces manual expert tuning with automated adaptive optimization, achieving reliable control performance while eliminating the time loss associated with expert parameter fitting processes.
Data Source
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AI summary
To provide a technique capable of adjusting a control parameter also between a motion control system and a low-order system for a motor control apparatus. A controller 10 in a motion control system 1 inputs a motion control deviation A2 based on computation of a motion control command A1 and a motion control response A4 into a first control device 51, and outputs a servo control command A3 based on a first control gain. A servo amplifier 20 as a motor control apparatus includes a second control device 52, a power converter 23, and a control gain estimator 27. The motor control apparatus inputs a signal based on the servo control command A3 and the motion control response A4 into the second control device 52, inputs a signal output from the second control device 52 into the power converter 23, and supplies a motor 30 with a signal output from the power converter 23. The control gain estimator 27 inputs the servo control command A3 and the motion control deviation A2 or the motion control command A1 therein and estimates the first control gain.