Splice Position Control for Fiber Web Machine Vibration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for minimizing vibrations in fiber web machines are inefficient, as they rely on experimental running modes that poorly correlate with the position of the splice and fabric width, leading to frequent re-experimentation and potential fabric damage due to vibrations, resulting in variable service life and premature fabric replacement.
Innovation Solution
Determining the position of the splice based on the fabric width using sensors and analyzing the correlation between the splice position and vibration level, allowing for real-time adjustment of the splice turning device to avoid vibration-prone areas, thereby extending fabric service life and reducing vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If experimental running mode patterns are used to minimize vibrations, then the vibration level can be monitored, but the correlation with splice position and fabric width is poor, leading to frequent re-experimentation and fabric damage
Solution Approach 1:
The system continuously monitors fabric width and splice position in real-time, using this feedback to dynamically adjust the splice turning device position. This closed-loop control eliminates the need for repeated experimental running modes by providing accurate, real-time data on the actual fabric and splice conditions, allowing immediate correction of vibration-prone configurations.
Solution Approach 2:
The patent replaces manual experimental adjustment methods with automated sensor-based detection and control systems. Optical or capacitive sensors measure fabric width and splice position electronically, substituting the previous mechanical trial-and-error approach with precise electronic measurement and automated actuator control.
2Ease of operation
If the splice turning device is oscillated continuously within a short distance, then the position can be adjusted, but the effect on vibration level remains unclear and fabric damage may occur
Solution Approach 1:
The system dynamically adjusts the splice turning device position based on real-time fabric width and splice position data. Rather than continuous oscillation within a fixed short distance, the actuator moves the splice turning device to optimal positions determined by the sensor feedback, adapting to changing fabric conditions and avoiding harmful oscillations that cause deformation.
Solution Approach 2:
The patent changes the control parameter from fixed-distance oscillation to variable position adjustment based on measured fabric width and splice position. The actuator position is continuously optimized by changing it according to the detected parameters, ensuring the splice is positioned to minimize vibrations without causing fabric deformation through excessive or inappropriate movement.
3Measurement precision
If vibration monitoring is used alone, then the vibration level can be detected, but the measurement only works after vibration has commenced, causing fabric or roll damage
Solution Approach 1:
The system performs preliminary action by continuously measuring fabric width and splice position before vibrations can cause damage. The sensors detect the actual splice position and fabric width in advance, allowing the control system to adjust the splice turning device proactively to prevent vibration-prone configurations from developing, rather than reacting after vibrations have already damaged the fabric.
Solution Approach 2:
The patent introduces fabric width and splice position measurements as intermediary parameters that mediate between the splice turning device position and vibration levels. These intermediate measurements provide early warning indicators that allow prediction and prevention of vibration problems before they manifest as harmful vibrations or fabric damage.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a method in a fiber web machine. In the method, the position of the splice (14) in a fabric (12) is changed in order to minimize the vibration level of the fiber web machine. The position of the splice (14) is determined on the basis of the width of the fabric (12). The invention also relates to an arrangement in a fiber web machine, and to a software product.