Servo Control Parameter Updating With Vibration Threshold Feedback

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Solution Overview

Problem

Conventional control parameter adjustment in production devices is time-consuming and requires skilled technicians, and adjustments may be adversely affected by environmental disturbances, leading to recurring issues with vibration-induced noise and vibration exceeding thresholds.

Innovation Solution

A control parameter generation method using a sensor to measure the position of an object driven by a servomotor, generating evaluation index data on vibration, and updating the control parameter with a machine learning model only when vibration is within a threshold, with interruptions for excessive vibration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If control parameter adjustment is performed manually by skilled technicians, then the control parameter can be adjusted with expertise, but the process is time-consuming and requires human intervention

Engineering Contradiction:

Improvecontrol parameter adjustment accuracyVSAvoidadjustment time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system performs self-adjustment of control parameters by automatically acquiring vibration data, evaluating whether vibration exceeds thresholds, and updating parameters without human intervention. The control device autonomously completes the entire adjustment process that previously required skilled technicians, eliminating both time loss and dependency on human expertise.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical adjustment with an automated control system that uses sensors to detect vibration and a control device to update parameters. This substitution of manual operation with an automated system resolves the contradiction by providing both speed and precision simultaneously.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If control parameter adjustment is performed manually, then skilled technicians can make precise adjustments, but environmental disturbances adversely affect the adjustments causing recurring vibration issues

Engineering Contradiction:

Improveadjustment precisionVSAvoidadjustment stability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The system continuously monitors vibration through sensors and uses this feedback to determine whether control parameter updates are needed. By establishing a feedback loop where vibration data directly informs adjustment decisions, the system achieves both precision and reliability, eliminating the adverse effects of environmental disturbances that plagued manual adjustments.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The control device evaluates vibration data before proceeding with parameter updates, ensuring that adjustments are only made when appropriate. This preliminary evaluation prevents unnecessary adjustments that could be adversely affected by environmental disturbances, thereby improving reliability while maintaining precision.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If control parameters are updated continuously, then the system adapts quickly to vibration issues, but unnecessary updates increase when vibration is already within acceptable thresholds

Engineering Contradiction:

Improveparameter update speedVSAvoidunnecessary update frequency

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The system performs parameter updates only partially - specifically, only when vibration evaluation indicates it is necessary. By applying the action of parameter update selectively rather than continuously, the system achieves fast adaptation when needed while avoiding unnecessary updates that would waste energy and resources.

Inventive Principle:

Principle #16Partial or excessive action

4Ease of manufacture

If manual control parameter adjustment is used, then the process is simple to implement, but it requires skilled technicians and is time-consuming

Engineering Contradiction:

Improveimplementation simplicityVSAvoidadjustment efficiency

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The control device autonomously performs the entire parameter adjustment process without requiring skilled technicians. The system self-manages data acquisition, vibration evaluation, and parameter updates, thereby maintaining implementation simplicity while dramatically improving adjustment efficiency and productivity.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250362647A1Control parameter generation method, program, recording medium, and control parameter generation device

Publication Date: 2025.11.27 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A control parameter generation method used in a production device, the method comprising: acquiring measurement data indicating a position from a sensor that measures the position of an object to be driven; and generating, based on the measurement data, evaluation index data indicating vibration of the object to be driven after a time at which the object to be driven has arrived. In a case where the vibration indicated by the evaluation index data is equal to or less than a predetermined threshold, based on the evaluation index data, the control parameter is updated using a machine learning model that learns the relationship between the evaluation index data and the control parameter, and in a case where the vibration indicated by the evaluation index data exceeds the predetermined threshold, the update of the control parameter is interrupted.