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Data-driven monitoring for stochastic systems and its application on batch process. (English) Zbl 1278.93259
Summary: Batch processes are characterized by a prescribed processing of raw materials into final products for a finite duration and play an important role in many industrial sectors due to the low-volume and high-value products. Process dynamics and stochastic disturbances are inherent characteristics of batch processes, which cause monitoring of batch processes a challenging problem in practice. To solve this problem, a subspace-aided data-driven approach is presented in this article for batch process monitoring. The advantages of the proposed approach lie in its simple form and its abilities to deal with stochastic disturbances and process dynamics existing in the process. The kernel density estimation, which serves as a non-parametric way of estimating the probability density function, is utilized for threshold calculation. An industrial benchmark of fed-batch penicillin production is finally utilized to verify the effectiveness of the proposed approach.

93E10Estimation and detection in stochastic control
93C73Perturbations in control systems
93C55Discrete-time control systems
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