An LLM-Driven Workflow for Automated Process Control Strategy Generation and Tuning from Dynamic Process Models

• URL: http://arxiv.org/abs/2607.21292v1
• Date: Thu, 23 Jul 2026 13:13:29 GMT
• Title: An LLM-Driven Workflow for Automated Process Control Strategy Generation and Tuning from Dynamic Process Models
• Abstract summary: We present a structured large-language-model-driven workflow for automated multi-variable control design from dynamic process models.<n>The proposed approach is demonstrated on a nonlinear gas-preheater benchmark with coupled pressure and temperature dynamics.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We present a structured large-language-model-driven workflow for automated multi-variable control design from dynamic process models. The workflow decomposes the design task into constrained code-generation steps: plant-interface construction, normalization, manipulated-variable controlled-variable (MV-CV) pairing, controller specification, closed loop simulation, scenario generation, performance evaluation and Bayesian-optimization (BO) based tuning. Generated artifacts are executed and validated before downstream tasks proceed, and failed artifacts are repaired using validation feedback. The proposed approach is demonstrated on a nonlinear gas-preheater benchmark with coupled pressure and temperature dynamics. The generated workflow produces a physically consistent decentralized PI (proportional-integral) feedback-feedforward control structure and an executable tuning environment. Bayesian optimization reduces the closed loop performance objective, which aggregates set-point tracking and disturbance-rejection errors for the controlled variables, by approximately 26.5% relative to the initial controller generated by the workflow, mainly through improved pressure-loop transient performance. This figure quantifies the automated tuning stage rather than a comparison against a manually designed controller. The results demonstrate the feasibility of using structured large-language-model-based code generation to construct executable control-design workflows, while also highlighting the need for broader validation on larger plantwide-control benchmarks.

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