AI助手预测用户修改偏好,加速结构逆向设计。
AI-Guided Human-In-the-Loop Inverse Design of High Performance Engineering Structures
- 用U-Net模型预测用户偏好的结构修改区域。
- 提升制造性或抗压强度39%,仅增加15秒设计时间。
- 适合需要高效人机协作的工程设计人员。
逆向设计工具如拓扑优化(Topology Optimization, TO)可显著提升高性能工程结构性能,但其广泛应用受限于计算耗时和黑箱特性,难以实现用户交互。现有“人在回路”式TO方法虽引入人类直觉,但依赖耗时的迭代区域选择。为减少试错次数,本文提出一种基于机器学习的AI协作者,通过图像分割任务预测用户偏好的修改区域。该模型采用U-Net架构,在合成数据集上训练,数据中人类偏好标注为最长拓扑构件或最复杂连接。模型成功预测出合理修改区域并作为AI建议呈现。该人类偏好模型在多样且非标准的拓扑优化问题中展现良好泛化能力,并表现出超越单区域选择训练数据的涌现行为。演示案例显示,集成AI协作者的新方法可在仅增加15秒总设计时间的前提下,使制造性改善或线性屈曲载荷提升39%。
原文摘要 · Abstract (English)
Inverse design tools such as Topology Optimization (TO) can achieve new levels of improvement for high-performance engineered structures. However, widespread use is hindered by high computational times and a black-box nature that inhibits user interaction. Human-in-the-loop TO approaches are emerging that integrate human intuition into the design generation process. However, these rely on the time-consuming bottleneck of iterative region selection for design modifications. To reduce the number of iterative trials, this contribution presents an AI co-pilot that uses machine learning to predict the user's preferred regions. The prediction model is configured as an image segmentation task with a U-Net architecture. It is trained on synthetic datasets where human preferences either identify the longest topological member or the most complex structural connection. The model successfully predicts plausible regions for modification and presents them to the user as AI recommendations. The human preference model demonstrates generalization across diverse and non-standard TO problems and exhibits emergent behavior outside the single-region selection training data. Demonstration examples show that the new human-in-the-loop TO approach that integrates the AI co-pilot can improve manufacturability or improve the linear buckling load by 39% while only increasing the total design time by 15 sec compared to conventional simplistic TO.
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