Design, evaluation, and implementation of a model-predictive control approach for a force control in friction stir welding processes
Design, evaluation, and implementation of a model-predictive control approach for a force control in friction stir welding processes
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搅拌摩擦焊过程中力控制的模型预测控制方法的设计、评估和实施
DOI：
10.1007/s11740-020-00969-6
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Grabmann
中科院分区：
文献类型：
--
作者：
Bernauer;Grabmann
摩擦压力连接是一种创新的连接工艺，用于在重叠配置中粘合塑料和金属，而无需添加剂。提出了一种基于模型的摩擦压接轴向力控制器设计方法。在加工中心上建立了以切入深度为控制变量的闭环控制。为了支持控制器的开发，通过基于数据的系统辨识开发了非参数动态过程模型。随后，离线设计了各种控制概念，并在实际系统上进行了验证。最有前途的，比例控制器，与极点配置方法创建的控制器，和模型预测控制器，被选为进一步的调查。三个控制器进行了重新评估和比较，通过一个定义的输入干扰变量和参考变量。模型预测控制（MPC）方法以及比例控制器也进行了测试模型的不确定性。为此，使用不同的控制器连接不同的材料组合。因此，它表明，MPC控制器导致较小的标准偏差时，遇到大的模型不确定性。研究表明，塑料部件与金属的摩擦压力连接具有很高的潜力。结果形成的基础上，为今后的研究，力可以指定为一个额外的输入参数，而不是插入深度。
Friction press joining is an innovative joining process for bonding plastics and metals without additives in an overlap configuration. A model-based approach for the design of an axial force controller for friction press joining is presented in this paper. A closed-loop control was set up on the machining center, in which the plunge depth was used as the controlling variable. In order to support the controller development, a nonparametric dynamic process model was developed via a data-based system identification. Subsequently, various control concepts were designed off-line and verified on the actual system. The most promising ones, a proportional controller, a controller created with the pole placement method, and a model predictive controller, were selected for further investigations. The three controllers were re-evaluated and compared by means of a defined input of disturbance variables and reference variables. The model predictive control (MPC) approach as well as the proportional controller were also tested for model uncertainties. For this purpose, different material combinations were joined using the different controllers. Thereby, it was shown that the MPC controller resulted in smaller standard deviations when encountering large model uncertainties. The investigations demonstrated the high potential of friction press joining of plastic components with metals. The results form the basis for future research, whereby the force can be specified as an additional input parameter instead of the plunge depth.
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