Development of a control model for predictive control data to extend the process limits of piezokinematic systems for production technology.

该项目的目的是为机床中使用的高动态压电轴开发预测控制模型。借助于待开发的控制模型，应该可以使用高于允许的控制器带宽的附加轴。控制模型应该用来准确地预测位置，而不必经历复杂的迭代过程。这将有助于扩展现有机床系统的生产极限，并提高压电系统的灵活性和性能。建模应基于所制造工件的触觉测量几何数据。通过使用工件测量数据，来自工具和工件的动态影响将被包括到模型中。为了从工件测量数据建模，必须对合适的系统识别方法进行比较和评估。鉴于目前的技术发展，一个重点应该放在机器学习与神经网络的方法。为了建模的目的，测量的工件数据必须被转换到时域、频域或拉普拉斯域以提取合适的特征。模型的带宽由用于工件加工的选定测试几何形状确定。为了增加模型带宽，必须改变测试几何形状的类型、加工速度、工件中几何形状的角度对准以及切削刃的偏转模式。带有附加压电轴的3轴加工中心可用于工艺条件下的加工和验证。机器性能的必要再现性或时间不变性得到保证。

The aim of the project is to develop a predictive control model for highly dynamic piezo axes for use in machine tools. With the aid of the control model to be developed, it should be possible to use the additional axes above the permissible controller bandwith. The control model should be used to predict the position accuratly without having to go through a complex iterative process. This should help to extend the production limits of existing machine tool systems and to increase the flexibility and performance of piezo systems. The modeling shall be based on tactile measured geometry data of manufactured workpieces. By using the workpiece measurement data, dynamic influences from the tool and the workpiece are to be included into the model. For modeling from the workpiece measurement data, suitable methods of system identification must be compared and evaluated with each other. In view of current technological developments, one focus should be put on methods of machine learning with neural networks. For modeling purposes, the measured workpiece data must be transformed into the time, frequency or laplace domain to extract suitable characteristics. The bandwidth of the model is determined by the selected test geometries used for the workpiece machining. In order to increase the model bandwidth, the type of test geometries, the machining speed, the angular alignment of the geometry in the workpiece and the deflection mode of the cutting edge must be varied. A 3-axis machining centre with additional piezo axes is available for teh and verification under process conditions. The necessary reproducibility or time invariance of the machine behaviour is guaranteed.