Servo Control Device Switching Loops for Vibration and Overshoot
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing servomechanisms face challenges in controlling low rigid loads, leading to vibration and overshoot issues due to slower load speed control loops, which affect stability and accuracy in both transient and steady states.
Innovation Solution
A control device with a first vibration-suppressive compensator loop and a second quicker loop, where a switch selects inputs from either loop based on the load's state, optimizing control by switching between loops to prevent overshoot in transient states and enhance vibration suppressiveness in steady states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a load speed control loop is added to suppress vibrations in low rigid loads, then vibration suppressiveness is improved, but response speed deteriorates causing overshoot in transient states
Solution Approach 1:
The patent applies dynamics by making the control loop configuration changeable based on operational conditions. A switching mechanism dynamically selects between different control loop configurations: a quadruple loop configuration (including load speed control) for steady-state vibration suppression, and a triple loop configuration (excluding load speed control) for transient-state quick response. This dynamic reconfiguration resolves the contradiction between vibration suppression and response speed.
Solution Approach 2:
The patent changes the structural parameters of the control system by switching between different loop configurations. The switching mechanism alters the number and arrangement of control loops based on whether the system is in transient or steady state, thereby adjusting the overall control characteristics to match operational requirements and eliminate overshoot while maintaining vibration suppression.
2Reliability
If a slower load speed control loop is placed inside the position control loop, then vibration suppressiveness is enhanced, but overshoot occurs in transient states
Solution Approach 1:
The patent uses dynamic switching to change the control loop configuration based on operational state. During transient states, the switching mechanism disables the load speed control loop to maintain quick response and prevent overshoot. During steady states, it enables the load speed control loop for vibration suppression. This dynamic adaptation maintains control stability across different operational phases.
Solution Approach 2:
The patent changes the structural parameters of the control system by switching between different loop configurations. The switching mechanism alters the number and arrangement of control loops based on whether the system is in transient or steady state, thereby adjusting the overall control characteristics to match operational requirements and eliminate overshoot while maintaining vibration suppression.
Data Source
AI summary
A control device includes a first switch (400) by which an input signal to a motor speed control loop (910) is selected from a signal of a position control loop (300) and a signal of the speed control loop (200), and a switch controller (500) that controls switching of the first switch (400), so that the first switch (400) can switch between a quadruple loop (a current control loop, the motor speed control loop, the speed control loop (200) and the position control loop (300)) with the speed control loop (200) embedded therein, and a triple loop (the current control loop, the motor speed control loop and the position control loop (300)) without the speed control loop (200), corresponding to a transient state and a steady state.