Motor Positioning Control for Low-Rigidity Load Adjustment
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Solution Overview
Problem
Existing positioning control devices require extensive time and effort for adjustment due to the need for trial-and-error parameter setting, especially with low-rigidity mechanical parts, and suffer from variability in adjustment quality depending on operator expertise, with previous methods selecting a single optimum control parameter for all position command patterns, leading to low controllability and long adjustment times.
Innovation Solution
A positioning control device that includes an adjustment unit to determine excellent command parameters based on operational conditions and state sensor signals, an adjustment record storage unit to store these parameters, and an estimation unit to estimate parameters for non-adjustment conditions, allowing for efficient and high-performance positioning operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single optimum control parameter is selected for all position command patterns, then the adjustment process is simplified, but the controllability and positioning performance for individual patterns deteriorate
Solution Approach 1:
The patent segments the control parameters into two categories: common parameters that apply to all position command patterns and individual parameters specific to each pattern. This segmentation allows the system to maintain simplified adjustment for common parameters while optimizing individual parameters for each specific pattern, thereby resolving the contradiction between ease of operation and controllability.
Solution Approach 2:
The patent applies local quality by allowing different parameter settings for different position command patterns. Instead of using a uniform parameter set for all patterns, the system enables localized parameter optimization for each specific pattern while maintaining a base set of common parameters, thus achieving both simplified adjustment and high controllability.
2Reliability
If trial-and-error adjustment is performed for low-rigidity mechanical parts, then positioning performance can be optimized, but the adjustment time and effort increase significantly
Solution Approach 1:
The patent implements preliminary action by pre-setting common control parameters that are applicable to multiple position command patterns. This preliminary configuration reduces the need for extensive trial-and-error adjustment for each individual pattern, thereby optimizing positioning performance while significantly reducing adjustment time and effort.
Solution Approach 2:
The patent uses copying by replicating the successfully tuned common parameter settings across multiple position command patterns. Instead of performing separate trial-and-error adjustments for each pattern, the system copies the optimized common parameters and makes only minor individual adjustments, thus maintaining high positioning performance while reducing adjustment time.
3Adaptability or versatility
If adjustment work is performed manually based on worker knowledge, then flexibility in handling different cases is improved, but adjustment quality varies from worker to worker
Solution Approach 1:
The patent implements self-service by enabling the system to automatically determine and adjust control parameters based on pre-established common parameter settings. The system uses the common parameters as a foundation and automatically optimizes individual pattern parameters, reducing dependency on manual worker knowledge while maintaining adaptability and ensuring consistent adjustment quality across different cases.
Data Source
AI summary
A positioning control device, in which motion of a motor in positioning operation of causing a mechanical load connected to the motor to move by a target moving distance is specified by operational conditions and command parameters, includes an adjustment unit performing the positioning operation based on an adjustment condition and a trial parameter, which are an operational condition and a command parameter, and determining one of the command parameters to be an excellent parameter corresponding to the adjustment condition based on an evaluation result based on the state of the motor or the mechanical load during positioning operation performed; and an estimation unit determining one of the command parameters to be an estimated excellent parameter corresponding to a non-adjustment condition, which is one type of the operational conditions, based on an adjustment record being a pair of the adjustment condition and the excellent parameter corresponding to the adjustment condition.