A new transport PDE/nonlinear ODE cascade model is proposed to simulate extrudate thickness for polymer extrusion with varying die gap. The model is developed to simulate extrusion in extrusion blow moulding. A finite element method simulator is used as a reference for the proposed model to replicate its time dependent extrudate thickness profile. The parameters of the proposed model are identified by minimizing the response error between the proposed model and the finite element method simulator due to step inputs. The novel model is computationally cheap, suitable for controller design, and effective in simulating the extrudate thickness.

中文翻译：

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变模距的聚合物挤出传输PDE /非线性ODE级联模型的参数辨识

提出了一种新的传输PDE /非线性ODE级联模型，以模拟具有不同模头间隙的聚合物挤出的挤出厚度。开发该模型以模拟挤出吹塑中的挤出。有限元方法模拟器用作所提出模型的参考，以复制其随时间变化的挤出物厚度轮廓。通过最小化所提出的模型和有限元方法模拟器之间由于阶跃输入而引起的响应误差来识别所提出的模型的参数。该新型模型在计算上便宜，适合于控制器设计，并且在模拟挤出物厚度方面有效。