Beam Cutting Control with Adaptive Process Windows
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Solution Overview
Problem
Beam cutting procedures, such as laser cutting, face reliability issues due to sudden disturbances leading to miscuts, even with active control, requiring manual intervention to restore cutting capability, and closed-loop control may not adequately address disturbances during cutting.
Innovation Solution
A beam cutting method that intermittently switches between open-loop and closed-loop control, defining and adapting a process window of parameters to maintain cutting quality, allowing process parameters to be outside the window during closed-loop control and adjusting based on captured quality parameters, incorporating experience from previous cuts to improve reliability and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If closed-loop control is used during beam cutting, then cutting quality can be maintained, but the system is vulnerable to sudden disturbances that lead to miscuts and require manual intervention
Solution Approach 1:
The patent applies dynamics by making the control mode flexible and adaptable rather than fixed. The system dynamically switches between open-loop and closed-loop control based on real-time process conditions. The process window is continuously adapted based on captured quality parameters, allowing the control strategy to evolve during the cutting process. This dynamic adaptation enables the system to respond to disturbances automatically, reducing manual intervention while maintaining reliability.
Solution Approach 2:
The patent implements feedback by capturing quality parameters during cutting procedures and using this information to adapt the process window. The system monitors cutting quality in real-time and adjusts control parameters based on the captured data. This feedback mechanism allows the system to learn from previous cuts and improve future performance, enhancing reliability while minimizing the need for manual intervention through automatic self-correction.
2Stability of the object's composition
If process parameters are kept within a fixed process window, then cutting stability is maintained, but adaptability to changing conditions is reduced
Solution Approach 1:
The patent resolves this contradiction by making the process window dynamic rather than fixed. The system starts with an initial process window to maintain stability, but continuously adapts this window based on quality parameters captured during cutting. This allows the process window to expand or shift in response to changing conditions while maintaining overall process stability through controlled adaptation.
Solution Approach 2:
The patent applies parameter changes by allowing the process window boundaries to be modified based on captured quality data. The system changes the acceptable parameter ranges dynamically, expanding them when conditions are stable and adjusting them when disturbances are detected. This enables the system to maintain stability during normal operation while adapting to changing cutting conditions when necessary.
3Device complexity
If open-loop control is used with fixed parameters, then system complexity is reduced, but cutting quality consistency deteriorates under disturbances
Solution Approach 1:
The patent applies segmentation by dividing the control process into distinct phases: an initial open-loop phase with fixed parameters to establish baseline cutting, followed by closed-loop phases where quality parameters are captured and used to adapt the process window. This segmented approach allows the system to maintain simplicity during stable operations while enabling quality correction when disturbances occur, balancing complexity and precision.
Solution Approach 2:
The patent implements preliminary action by performing open-loop cutting with fixed parameters first to establish a baseline process window. This preliminary phase captures initial quality data that is then used to adapt the process window for subsequent cutting operations. By preparing the process window in advance based on preliminary cutting data, the system maintains simplicity while ensuring quality consistency through pre-adapted parameters.
Data Source
AI summary
A beam cutting method includes conducting at least one cutting procedure while capturing at least one quality parameter. The at least one cutting procedure is intermittently implemented with an operation not subject to a closed-loop control and intermittently implemented with an operation subject to the closed-loop control. The beam cutting method further includes defining a process window in a parameter space of at least one process parameter, and choosing the at least one process parameter within the process window during the operation not subject to the closed-loop control. The at least one process parameter is allowed to be outside of the process window during the operation subject to the closed-loop control. The beam cutting method further includes adapting the process window based on changes in the at least one process parameter during the operation subject to the closed-loop control and/or changes in the at least one quality parameter.