SimuGen: Multi-modal Agentic Framework for Constructing Block Diagram-Based Simulation Models

TL;DR

SimuGen is a multimodal agent-based framework that improves the automatic generation of Simulink models by integrating visual diagrams and domain knowledge, addressing the limitations of language models in simulation code creation.

Contribution

It introduces a collaborative, modular system leveraging multiple specialized agents and visual data to enhance the accuracy and reliability of Simulink simulation code generation.

Findings

Enhanced accuracy in Simulink code generation

Robustness through multimodal integration

Open-source implementation available

Abstract

Recent advances in large language models (LLMs) have shown impressive performance in mathematical reasoning and code generation. However, LLMs still struggle in the simulation domain, particularly in generating Simulink models, which are essential tools in engineering and scientific research. Our preliminary experiments indicate that LLM agents often fail to produce reliable and complete Simulink simulation code from text-only inputs, likely due to the lack of Simulink-specific data in their pretraining. To address this challenge, we propose SimuGen, a multimodal agent-based framework that automatically generates accurate Simulink simulation code by leveraging both the visual Simulink diagram and domain knowledge. SimuGen coordinates several specialized agents, including an investigator, unit test reviewer, code generator, executor, debug locator, and report writer, supported by a domain-specific knowledge base. This collaborative and modular design enables interpretable, robust, and reproducible Simulink simulation generation. Our source code is publicly available at https://github.com/renxinxing123/SimuGen_beta.