Robust nonlinear feedback–feedforward control of a coupled kinetic Monte Carlo–finite difference simulation
| Autor: | Timothy O. Drews, Richard C. Alkire, David L. Ma, Effendi Rusli, Richard D. Braatz |
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| Rok vydání: | 2006 |
| Předmět: |
Stochastic control
Computer science Stochastic modelling Feed forward Nonlinear control Industrial and Manufacturing Engineering Computer Science Applications Nonlinear system Control and Systems Engineering Robustness (computer science) Control theory Modeling and Simulation Stochastic simulation Kinetic Monte Carlo |
| Zdroj: | Journal of Process Control. 16:409-417 |
| ISSN: | 0959-1524 |
| DOI: | 10.1016/j.jprocont.2005.05.007 |
| Popis: | Robust nonlinear feedforward–feedback controllers are designed for a multiscale system that dynamically couples kinetic Monte Carlo (KMC) and finite difference (FD) simulation codes. The coupled codes simulate the copper electrodeposition process for manufacturing on-chip copper interconnects in electronic devices. The control objective is to regulate the current density subject to the condition that the steady-state fluctuation of the overpotential remains bounded within ±0.01 V. The controller designs incorporate a low-order stochastic model that captures the input–output behavior of the coupled KMC–FD code. The controllers achieve the objectives and the closed-loop responses implemented on the low-order model and the coupled KMC–FD code match well within stochastic variations. The nonlinear feedforward control reduces the rise time of the controller response while the feedback control ensures robustness in the presence of model uncertainty. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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