论文标题
通过采用数字双胞胎方法来努力智能过程自我控制:概念证明研究用于烹饪应用
Endeavouring Intelligent Process Self-Control by Employing Digital Twin Methodology: Proof-of-Concept Study for Cooking Applications
论文作者
论文摘要
这项工作证明了使用数字双胞胎方法来预测鸡肉的水浓度和温度。它标志着自主烹饪设备的道路上的一个里程碑,不仅可以控制装置温度,还可以控制烹饪食品质量标记。定制水传输方程与能量方程式耦合。传输方程通过用户定义功能(UDF)代码在C中实现。该模型与项目合作伙伴提供的实验非常吻合。进行泛粉的热流体结构相互作用模拟,以获得逼真的传热系数。他们表明,食品传输方程与周围传热机制的耦合,例如辐射和自然对流,似乎有望在未来的研究中进行。在现场操作过程中,该过程的共模拟是不可行的,因此引入了减少阶模型(ROM)。对ANSYS平台上ROM工具包的评估表明,线性时间不变(LTI)模型不适合烹饪应用。相比之下,最近启动的动态ROM构建器预测了误差明显较低的核心温度(较低的模型和全阶模型的离散误差的因素十)。有两个例子证明了控制鸡肉片的核心温度的数字双胞胎的用法。 PI闭环控制系统对动态ROM评估引起的错误不敏感。
This work demonstrates the use of the Digital Twin methodology to predict the water concentration and temperature of chicken meat. It marks a milestone on the path to autonomous cooking devices that do not only control device temperatures but culinary food quality markers as well. A custom water transport equation is coupled to the energy equation. The transport equations are implemented in ANSYS Fluent 2019R2 via User Defined Function (UDF) code written in C. The model is in good agreement with experiments provided by project partners. Thermal fluid-structure interaction simulations of pan-frying are performed to obtain realistic heat transfer coefficients. They indicate that the coupling of food transport equations to the surrounding heat transfer mechanisms, such as radiation and natural convection, seems promising for future research. Co-simulation of the process is not feasible during operation in the field, so reduced-order models (ROM) are introduced. An evaluation of ROM toolkits on the ANSYS platform reveals that linear time-invariant (LTI) models are unsuitable for cooking applications. In contrast, the recently launched Dynamic ROM Builder predicts the core temperatures with significantly low errors (factor ten below the model and discretization errors of the full-order model). Two examples demonstrate the usage of a Digital Twin controlling the core temperature of chicken fillets. The PI closed-loop control system remains insensitive to errors induced by the Dynamic ROM evaluation.