Dynamic Deviation Control for Filling System Startup Stability
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Solution Overview
Problem
Bottling plants experience instability during startup and shutdown, leading to false positive error messages and unnecessary machine stops due to pressure fluctuations and mass inertia, causing delays and requiring additional operator intervention.
Innovation Solution
Adapting permissible deviations for characteristic parameters during startup and shutdown phases, allowing greater fluctuations in these phases to account for dynamic behavior without affecting normal operation accuracy, and enabling continuous monitoring adjustments based on measured parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed permissible deviation is used for all operation phases, then error detection accuracy is maintained, but false positive error messages occur during startup and shutdown due to natural parameter fluctuations
Solution Approach 1:
The permissible deviation is made dynamic by introducing an operating phase identifier that adjusts the deviation threshold based on whether the system is in startup, normal operation, or shutdown phase. During startup and shutdown, a larger permissible deviation is allowed to accommodate natural fluctuations, while strict monitoring is maintained during normal operation.
Solution Approach 2:
The control parameter (permissible deviation) is changed based on operating conditions. The system modifies the deviation threshold parameter dynamically according to the operating phase, allowing greater flexibility during transient phases while maintaining precision during steady-state operation.
2Object-affected harmful factors
If a larger permissible deviation is allowed during startup phase, then false positive error messages are reduced, but production accuracy may be compromised during normal operation
Solution Approach 1:
The operation is segmented into distinct phases (startup, normal operation, shutdown), each with its own permissible deviation settings. This segmentation allows optimized control parameters for each phase, preventing false positives during transient operations while maintaining accuracy during production.
Solution Approach 2:
The system dynamically adapts the permissible deviation based on the current operating phase identified by the operating phase identifier, ensuring that startup and shutdown phases have relaxed constraints while normal operation maintains strict accuracy requirements.
3Productivity
If continuous monitoring with fixed thresholds is implemented, then real-time detection is maintained, but unnecessary machine stops occur during startup and shutdown phases
Solution Approach 1:
The monitoring threshold parameter is changed dynamically based on operating phase. During startup and shutdown, the increased permissible deviation prevents unnecessary stops caused by transient fluctuations, while maintaining continuous monitoring capability for real-time detection during normal operation.
Data Source
Figure 1
AI summary
The invention describes a method for operating a filling system, which comprises at least one phase of starting up (1) the filling system and a phase of normal operation (2) of the started filling system. The fact that the actual value (M) of at least one parameter (P) that is characteristic of a proper operating state is measured and, in the start-up phase, a different deviation of the actual value from a target value (S, S1) of the parameter is permitted than in the phase of normal operation, means that, during the phase of normal operation, a permissible deviation of the actual value from the desired value can be adapted to the comparatively unstable operating conditions as the system is being started up without having to change the permissible deviation of the actual value from the target value during normal operation or to restrict the control during normal operation.