Surrogate modeling of nonstationary systems with uncertain properties

2015 ◽  
pp. 4079-4087 ◽  
Author(s):  
L Avendaño-Valencia ◽  
E Chatzi ◽  
M Spiridonakos
Keyword(s):  
Surrogate Modeling ◽  
Nonstationary Systems

scholarly journals Machine learning and simulation-based surrogate modeling for improved process chain operation

2021 ◽  
Author(s):  
André Hürkamp ◽  
Sebastian Gellrich ◽  
Antal Dér ◽  
Christoph Herrmann ◽  
Klaus Dröder ◽  
...  
Keyword(s):  
Surrogate Modeling ◽  
Temperature History ◽  
Injection Molding Process ◽  
Process Chain ◽  
Molding Process ◽  
Whole Process ◽  
Virtual Production ◽  
Sensor Model ◽  
Fast Prediction ◽  
Operation Phase

AbstractIn this contribution, a concept is presented that combines different simulation paradigms during the engineering phase. These methods are transferred into the operation phase by the use of data-based surrogates. As an virtual production scenario, the process combination of thermoforming continuous fiber-reinforced thermoplastic sheets and injection overmolding of thermoplastic polymers is investigated. Since this process is very sensitive regarding the temperature, the volatile transfer time is considered in a dynamic process chain control. Based on numerical analyses of the injection molding process, a surrogate model is developed. It enables a fast prediction of the product quality based on the temperature history. The physical model is transferred to an agent-based process chain simulation identifying lead time, bottle necks and quality rates taking into account the whole process chain. In the second step of surrogate modeling, a feasible soft sensor model is derived for quality control over the process chain during the operation stage. For this specific uses case, the production rejection can be reduced by 12% compared to conventional static approaches.

Improvements in storm surge surrogate modeling for synthetic storm parameterization, node condition classification and implementation to small size databases

2021 ◽  
Author(s):  
Aikaterini P. Kyprioti ◽  
Alexandros A. Taflanidis ◽  
Matthew Plumlee ◽  
Taylor G. Asher ◽  
Elaine Spiller ◽  
...  
Keyword(s):  
Storm Surge ◽  
Surrogate Modeling
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