Parameter Determination for Servo Motors with Unknown Circuit Constants

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Determining an optimum driving parameter for a servo motor with unknown circuit constants is a complex and time-consuming process, requiring skilled workers and lengthy procedures.

Innovation Solution

A parameter determination supporting device that acquires motor specification and output information, generates a trial run program, automatically measures operation data, estimates circuit constants, and calculates optimal parameters, simplifying the process and reducing determination time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a complicated procedure is used to determine optimum driving parameter for motors with unknown circuit constants, then the accuracy of parameter determination is improved, but the time required and skill level needed increase

Engineering Contradiction:

Improveparameter determination accuracyVSAvoiddetermination time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system automatically determines optimal driving parameters by having the motor perform self-tests and measurements. The control device autonomously acquires operation data during trial runs, estimates circuit constants, and calculates optimal parameters without requiring external measurement equipment or manual intervention, thus reducing time while maintaining accuracy

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system uses feedback from operation data acquired during trial runs to iteratively refine parameter determination. The control device monitors current values and speed during operation, uses this feedback to estimate circuit constants, and adjusts driving parameters accordingly, achieving accurate determination through automated feedback loops

Inventive Principle:

Principle #23Feedback

2Measurement precision

Engineering Contradiction:

Improveparameter determination accuracyVSAvoidoperation simplicity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The motor and control device perform self-measurement and self-determination of parameters. The system automatically executes trial run programs, acquires operation data, estimates circuit constants, and calculates optimal parameters without requiring operator skill or manual measurement procedures, thereby simplifying operation while maintaining determination accuracy

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system performs preliminary automated preparations including generating trial run programs based on output specifications, setting initial parameters, and preparing measurement routines before actual operation. This preliminary automation eliminates the need for operators to perform complex setup procedures manually

Inventive Principle:

Principle #10Preliminary action

3Reliability

If manual determination of driving parameters is performed by skilled workers, then the quality of parameter setup is maintained, but productivity decreases

Engineering Contradiction:

Improveparameter setup qualityVSAvoiddetermination speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The system replaces manual mechanical determination processes with automated electronic control and calculation. The control device uses electronic measurement of operation data, computational estimation of circuit constants, and algorithmic calculation of optimal parameters, substituting skilled workers' manual procedures with automated electronic systems that are both reliable and fast

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The control device acts as an intermediary between the motor and the parameter determination process. It automatically acquires operation data during trial runs, processes this data to estimate circuit constants, and calculates optimal parameters, serving as an intelligent mediator that eliminates the need for manual intervention while ensuring quality results

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10615734B2Parameter determination supporting device

Publication Date: 2020.04.07 FANUC LTD

AI summary

To determine a driving parameter for driving a motor having an unknown circuit constant in a simple way and to shorten time required for the determination. A parameter determination supporting device comprises: initial parameter determination means that determines an initial parameter for a trial run based on specification information about a motor driver and output specification information about a motor; program generation means that generates a trial run program based on the output specification information about the motor, the trial run program being used in a trial run for acquiring data necessary for adjusting a parameter for determining an output from the motor; automatic measurement means that automatically measures operation information determined by driving the motor by applying the initial parameter and following the trial run program; estimation means that estimates the circuit constant of the motor based on the operation information; and calculation means that calculates an optimum parameter conforming to the output specification of the motor based on the circuit constant.