Motor Drive Servo Adjuster for Stability and Accuracy
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Solution Overview
Problem
Conventional motor drive devices require detailed knowledge and experience to perform servo adjustments effectively, as various automatic adjustment functions are individually optimized, leading to a lack of series matching in servo adjustment flows, and the setting of command response and stiffness indicators can be complex, making it difficult for workers to achieve optimal results without understanding control theory and servo adjustment procedures.
Innovation Solution
A motor drive device with a servo adjuster that stores command response and stiffness indicators, automatically sets filter characteristics and parameters for the position and speed controller, and measures evaluation indicators to sequentially change these indicators based on a generated evaluation indicator measuring pattern, allowing for stable servo adjustments even by workers without detailed knowledge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic adjustment functions are individually optimized, then each function performs well independently, but the overall servo adjustment flow lacks series matching and requires detailed knowledge
Solution Approach 1:
The patent combines multiple individually optimized automatic adjustment functions (command response setting, stiffness setting, evaluation indicator measurement) into an integrated servo adjustment flow. The control device sequentially executes these functions in a coordinated manner, where each function's output serves as input for the next function, creating series matching across the entire adjustment process while maintaining the individual optimization of each function.
Solution Approach 2:
The patent systematically varies key parameters (command response indicators, stiffness indicators, evaluation indicators) through defined ranges and steps. By changing these parameters in a structured sequence and measuring their effects, the system automates the tuning process without requiring operators to understand complex control theory, thus reducing operational complexity while maintaining reliability.
2Adaptability or versatility
If command response and stiffness indicators are manually adjusted, then customization is possible, but the process becomes complex requiring understanding of control theory
Solution Approach 1:
The control device performs self-adjustment by automatically setting command response and stiffness indicators based on measured evaluation indicators. The system measures positioning indicators, vibration indicators, or both, and autonomously determines optimal parameter values without requiring external expert intervention. This self-service capability maintains customization while eliminating the need for operators to understand control theory.
Solution Approach 2:
The patent implements a feedback mechanism where evaluation indicators (positioning indicator, vibration indicator) are measured during servo adjustment, and these measurements are fed back to automatically adjust command response and stiffness indicators. This closed-loop feedback process enables customization through automatic parameter optimization rather than manual adjustment, reducing procedural complexity while maintaining adaptability.
3Manufacturing precision
If detailed servo adjustment knowledge is required, then optimal results can be achieved, but workers without such knowledge cannot perform adjustments effectively
Solution Approach 1:
The patent pre-defines adjustment procedures, parameter ranges, and evaluation criteria within the control device. The system prepares the servo adjustment process in advance by establishing the sequence of operations, the indicators to be measured, and the methods for determining optimal parameters. This preliminary preparation enables workers without specialized knowledge to perform adjustments effectively by simply following the automated guidance.
Solution Approach 2:
The patent replaces the need for human expert knowledge (mechanical/metacognitive system) with an automated electronic control system. The control device uses electronic measurement and calculation to determine optimal servo parameters, substituting the human expert's brain with an electronic brain that objectively measures evaluation indicators and computes optimal settings, thereby achieving high precision without requiring operator expertise.
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A motor drive device (2) of the present invention includes a command response setting unit (22), a position and speed controller (23), a load characteristic compensator (24), a servo adjuster (6), a command response setting function (221), a stiffness setting function (231), an evaluation indicator measuring function (27), and a storage (28). The servo adjuster (6) stores a plurality of command response indicators (61) and a plurality of stiffness indicators (62). The servo adjuster (6) also generates an evaluation indicator measuring pattern (63) by a combination of each command response indicator (61) and each stiffness indicator (62). A motor (3) is driven in accordance with the generated evaluation indicator measuring pattern (63) while the command response indicators (61) and the stiffness indicators (62) are sequentially changed.