Motor Control Device Settling Time Reduction via Dual Force
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Solution Overview
Problem
Existing motor control devices experience an increase in the time required for the mover to settle its position, which is not efficiently addressed by current technologies.
Innovation Solution
A motor control device that includes a signal processing circuit which generates a first force to accelerate the mover's speed and a second force to decelerate it, once the first force is established, when the position deviation per unit time is within or less than a predetermined change amount, thereby controlling the position deviation effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a speed limiter is provided at a subsequent stage of the changeover switch to limit the speed command to a predetermined magnitude or less to absorb fluctuation of the speed command at the time of control switching, then the speed command fluctuation is absorbed, but the time required for settling the position of the mover increases
Solution Approach 1:
The invention applies preliminary action by generating a first force to accelerate the mover's speed before the position deviation becomes too large, and then generating a second force to decelerate the mover. This proactive force generation based on predicted future position deviation prevents excessive oscillation and reduces settling time while maintaining stability.
Solution Approach 2:
The invention implements dynamics by dynamically switching between different force generation modes based on real-time position deviation measurements. The control system transitions from generating only a second force (deceleration) to generating both first force (acceleration) and second force (deceleration) when position deviation exceeds a threshold, creating an adaptive dynamic response that optimizes settling performance.
2Device complexity
If the position deviation is allowed to change freely without force intervention, then the control system is simpler, but the positioning accuracy and settling time deteriorate
Solution Approach 1:
The invention applies feedback by continuously measuring the position deviation between the mover and target position, comparing it against a threshold value, and using this feedback information to determine when to generate the first and second forces. This closed-loop feedback mechanism ensures positioning accuracy while maintaining relatively simple control logic.
Solution Approach 2:
The invention implements parameter changes by modifying the force generation parameters based on the position deviation threshold. When position deviation exceeds the threshold, the system changes from a passive control state to an active control state where both acceleration and deceleration forces are generated, thereby improving positioning accuracy without requiring complex control architecture.
Data Source
AI summary
Provided is a motor control device capable of suppressing an increase in a time required for settling a position of a mover. Motor control device includes signal processing circuit that controls motor that moves mover. In a case where a change amount of a position deviation per unit time is equal to or less than a predetermined change amount, the position deviation being a difference between a target position of mover and a position of mover detected by position detection device for detecting the position of mover, signal processing circuit controls motor, and a first force for accelerating a speed of mover is generated and a second force for decelerating the speed of mover is generated after the first force is generated.