Advancement of the automatic simplification of discrete event material flow models by using continuous model elements.

物质流模拟中的模型越来越大，越来越详细。由于复杂性的增加，仿真运行时间对于以有效的方式进行实验来说太大。提高运行时间的一种可能性是通过使用模型简化来降低模型的复杂性。然而，模型简化的代价是相对于原始模型的行为偏差。申请人在他的论文中开发了一种考虑复杂性和行为偏差的模型简化方法。该方法能够自动简化模型，控制模型的复杂性和行为偏差，从而生成具有特定属性的模型，该方法在本研究中将得到显著的改进和扩展。当复杂度不变时，应增加可实现的复杂度降低，并减少偏差。这一目标是通过使用混合仿真来实现的。将简化的离散事件模型与连续模型耦合。这些连续模型在抽象层次上表示原始模型的那些模型组件，这些组件在简化过程中被替换。通过混合仿真，使以前不可替代的部件变得可替代，并更好地近似替代部件的动态特性。此外，还应开发一个功能，该功能根据离散和连续模型的状态计算作业序列的变化，因为它们发生在原始模型中，由超车和优先级规则引起。所有方法的开发都应符合以下要求：通过自动简化算法可适用于这些方法，并可实现原型并进行全面评估。

Models in material flow simulation are of growing size and detail. Because of the increased complexity the simulation runtime is too big for conducting experiments in an efficient manner. One possibility to improve runtime is reducing the model complexity by using model simplification. The price of model simplification however is the creation of behavioral deviation in relation to the original model. A method of model simplification which takes complexity and behavioral deviation into account was developed by the applicant in his dissertation. The developed method simplifies models automatically and controls the complexity and behavioral deviation in order to create models of specific properties.This method shall be significantly improved and extended in this research project. The achievable complexity reduction shall be increased and the deviation shall be reduced when complexity is constant. This goal is to be reached by using hybrid simulation. The simplified discrete event model is coupled with continuous models. These continuous models are representing those model components of the original model on an abstract level which were substituted during simplification. By using hybrid simulation, components get substitutable which were not substitutable previously and the dynamics of substituted components is better approximated. Additionally, a function shall be developed, which calculates changes in the sequence of jobs based on the states of the discrete and the continuous models as they occur in the original model caused by overtaking and priority rules. All methods shall be developed in a matter, such that they are applicable by an algorithm for automatic simplification and are to be implemented prototypical and are thoroughly evaluated.