Linear Motor Carriage Position Correction at Module Boundaries
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing transport systems using moving magnet type linear motors face issues with carriage precision and stability, particularly when transitioning between control zones, leading to vibrations and inaccurate positioning due to deviations in the distance between transporting modules.
Innovation Solution
A transport system with sensors on each module to correct drive commands based on the distance between sensors, ensuring precise control and preventing vibrations by adjusting the position information used for electric current control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the carriage velocity is changed when passing through the boundary between transporting modules, then the transport speed can be adjusted, but the carriage vibrates and positioning precision deteriorates
Solution Approach 1:
The system pre-calculates and stores correction values for carriage velocity changes before the carriage reaches module boundaries. These correction values are applied in advance to prevent vibrations and positioning errors, rather than making reactive adjustments during boundary transitions.
Solution Approach 2:
The system uses sensors to detect the actual position of the carriage and compares it with the commanded position. Based on this feedback, the system dynamically adjusts drive commands to compensate for velocity changes at module boundaries, maintaining positioning precision while allowing speed adjustments.
2Adaptability or versatility
If the distance between transporting modules deviates from the predetermined value, then module assembly flexibility is improved, but the carriage cannot stop at the desired position with required precision
Solution Approach 1:
The system dynamically adjusts drive command parameters based on the actual measured distance between transporting modules. By changing the velocity and position parameters in real-time according to the actual module spacing, the system maintains precise stopping capability regardless of assembly variations.
Solution Approach 2:
Sensors measure the actual distance between transporting modules and feed this information back to the control system. The control system then compensates for distance deviations by adjusting drive commands, ensuring the carriage stops at the desired position even when module spacing varies from predetermined values.
3Adaptability or versatility
If the carriage is controlled to move across multiple control zones, then the transport system can handle complex routing, but the system complexity increases with multiple controllers
Solution Approach 1:
The system merges the control functions of multiple transporting modules into a unified control framework. By integrating sensor data and drive command generation across modules, the system reduces the need for independent complex controllers in each zone while maintaining the ability to handle complex routing scenarios.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves high precision in transporting carriages across multiple modules by correcting drive commands, preventing vibrations and ensuring accurate positioning, thereby enhancing the overall efficiency and reliability of the transport process.
Implementation Method 1
a transport system applying a moving magnet type linear motor (or MM type linear motor) technology
Data Source
AI summary
A transport system includes a transport path having at least two transporting modules, a carriage configured to move on the transport path, a controller provided on each of the two transporting modules and configured to drive the carriage in response to a drive command, and a sensor provided on each of the two transporting modules. The drive command is corrected with a distance between the sensors provided on the two transporting modules.