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Researchers have developed a brand new Bayesian calibration framework that considerably improves the accuracy of digital twin fashions for automated materials dealing with techniques (AMHSs) by addressing each parameter uncertainty and system discrepancy.
The framework makes use of sparse subject information and probabilistic modeling to calibrate digital twins, outperforming typical fashions and enabling quicker, extra dependable predictions in complicated manufacturing environments.
The strategy has been validated via empirical testing, utilized at Samsung Show, and is designed to scale throughout numerous industries in search of correct, self-adaptive digital twin options.
PRESS RELEASE — Digital twins for automated materials dealing with techniques (AMHSs) of semiconductor and show fabrication industries endure from parameter uncertainty and discrepancy. This results in inaccurate predictions, finally affecting efficiency. To handle this, researchers have developed a brand new Bayesian calibration framework that concurrently accounts for each parameter uncertainty and discrepancy, enhancing the prediction accuracy of digital twin fashions. This modern framework holds nice potential for enhancing digital twin applicability throughout various industries.
To handle more and more complicated manufacturing techniques, involving materials flows throughout quite a few transporters, machines, and storage areas, the semiconductors and show fabrication industries have applied automated materials dealing with techniques (AMHSs). AMHSs sometimes contain complicated manufacturing steps and management logic, and digital twin fashions have emerged as a promising resolution to reinforce the visibility, predictability, and responsiveness of manufacturing and materials dealing with operation techniques. Nonetheless, digital twins don’t at all times absolutely mirror actuality, doubtlessly affecting manufacturing efficiency and will end in delays.
Digital twins of AMHSs face two main points: parameter uncertainty and discrepancy. Parameter uncertainty arises from real-world parameters which can be tough to measure exactly however are important for correct modeling. For instance, the acceleration of an automatic car in AMHSs can differ barely within the subject however is mounted within the digital twin. Discrepancy, alternatively, originates from the distinction in operational logic between the real-world system and the digital twin. That is particularly vital since digital twins sometimes simplify or resemble the true processes, and discrepancies amassed over time result in inaccurate predictions. Regardless of its significance, most performance-level calibration frameworks overlook discrepancy and focus solely on parameter uncertainty. Furthermore, they usually require a considerable amount of subject information.
To handle this hole, a analysis group led by Professor Soondo Hong from the Division of Industrial Engineering at Pusan Nationwide College, South Korea, developed a brand new Bayesian calibration framework. “Our framework permits us to concurrently optimize calibration parameters and compensate for discrepancy,” explains Prof. Hong. “It’s designed to scale throughout giant sensible manufacturing facility environments, delivering dependable calibration efficiency with considerably much less subject information than typical strategies.” Their research was made out there on-line on Could 08, 2025, and revealed in Quantity 80 of the Journal of Manufacturing Programs on June 01, 2025.
The researchers utilized modular Bayesian calibration for numerous working situations. Bayesian calibration can use sparse real-world information to estimate unsure parameters whereas additionally accounting for discrepancy. It really works by combining subject observations and out there prior data with digital twin simulation outcomes via probabilistic fashions, particularly Gaussian processes, to acquire a posterior distribution of calibrated digital twin outcomes over numerous working situations. They in contrast the efficiency of three fashions: a field-only surrogate that predicts real-world conduct instantly from noticed information; a baseline digital twin mannequin utilizing solely calibrated parameters; and the calibrated digital twin mannequin accounting for each parameter uncertainty and discrepancy.
The calibrated digital twin mannequin considerably outperformed the field-only surrogate and confirmed concrete enhancements in prediction accuracy over the baseline digital fashions. “Our strategy permits efficient calibration even with scant real-world observations, whereas additionally accounting for inherent mannequin discrepancy.” notes Prof. Hong, “Importantly, it affords a sensible and reusable calibration process validated via empirical experiments, and will be custom-made for every facility’s traits.”
The developed framework is a sensible and reusable strategy that can be utilized to precisely calibrate and optimize digital twins, in any other case hindered by scale, discrepancy, complexity, or the have to be versatile for widespread cross-industry utility. This strategy precisely predicted subject system responses for large-scale techniques with scarce subject observations and supported fast calibration of future manufacturing schedules in real-world techniques. The calibration system can also be apt for discrepancy-prone digital fashions that behave otherwise than their real-world counterparts on account of simplified logic or code. Excessive-complexity manufacturing and materials dealing with environments, the place handbook optimization is difficult, can even profit from this calibration framework. It additionally permits the event of reusable and sustainable digital twin frameworks that may be utilized to completely different industries. Moreover, this strategy is being utilized and scaled at Samsung Show, the place the researchers have carefully collaborated with operation groups to customise the framework for the real-world complexities.
Total, this novel framework has the potential to vary the applicability and effectivity of AMHSs. Wanting forward, Prof. Hong concludes, “Our analysis affords a pathway towards self-adaptive digital twins, and sooner or later, has sturdy potential to develop into a core enabler of sensible manufacturing.”
