Motor Control Device Automatic Parameter Adjustment
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Solution Overview
Problem
Existing motor control devices require significant labor and time to adjust control parameters, and manual trial and error methods are inefficient, especially during initial activation or when changes occur in the mounting situation or the machine itself, leading to instability and the need for recovery operations.
Innovation Solution
A motor control device with a follow-up control unit, oscillation detection unit, and automatic adjustment unit that monitors control status and adjusts parameters only when abnormalities are detected, allowing for automatic stabilization and adjustment through minimal operations, even without a command signal from an upper-level controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If control parameters are adjusted manually through trial and error, then the machine can be operated and response determined, but a large amount of time and effort are required
Solution Approach 1:
The control device automatically adjusts its own control parameters by detecting oscillation in control status amounts and autonomously modifying feedback gain, feedforward gain, and notch filter settings without requiring external manual intervention or trial-and-error operations
Solution Approach 2:
The system continuously monitors control status amounts (torque command, detection position, speed) for oscillation and uses this feedback information to automatically adjust control parameters, creating a closed-loop self-tuning mechanism that eliminates manual adjustment time
2Speed
If feedback gain is set large to increase response, then response speed improves, but oscillation occurs in control status amount
Solution Approach 1:
The feedback gain is transformed from a static fixed value to a dynamic variable that automatically adjusts based on real-time oscillation detection, allowing the system to maintain high response speed when stable while preventing oscillation when instability is detected
Solution Approach 2:
The system changes the feedback gain parameter dynamically by detecting oscillation in control status amounts and automatically adjusting the gain value to prevent oscillation while maintaining response performance
3Speed
If feedforward gain is set large to increase response, then response improves, but oscillation of positional deviation occurs
Solution Approach 1:
The feedforward gain is transformed from a static value to a dynamic parameter that automatically adjusts based on oscillation detection in positional deviation, enabling the system to optimize response speed while preventing oscillation through real-time monitoring and adjustment
4Adaptability or versatility
If conventional adjustment methods are used, then control parameters can be adjusted, but operation parameters must be set individually for each machine specification
Solution Approach 1:
The control device automatically adapts to different machine specifications by detecting oscillation characteristics during operation and autonomously adjusting control parameters specific to each machine, eliminating the need for manual individualized parameter setting for different machine types
Solution Approach 2:
The automatic adjustment mechanism provides universal adaptability across different machine specifications through a single standardized system that automatically tailors control parameters to each specific application, replacing multiple machine-specific configuration procedures
Data Source
AI summary
Provided is a motor control device which realizes automatic adjustment of control of a motor for driving a mechanical load through a simple operation. The motor control device includes: a follow-up control unit (6) for receiving detection information of a detector (3) to output a torque command signal and output a status of motor control of a motor (1) as a control status amount signal, when a command signal regarding the motor control to be output from an upper-level controller is absent; an oscillation detection unit (9) for receiving the control status amount signal and detecting oscillation of a control status amount to output an oscillation detection signal; and an automatic adjustment unit (10) for receiving the oscillation detection signal to monitor a control status of the motor (1) and adjust a control parameter of the follow-up control unit (6) only when abnormality is detected.