Media-free and non-contact multi-coordinate positioning system using ultrasonic levitation and magnetic guides

使用超声波悬浮和磁导轨的无介质、非接触式多坐标定位系统

• 批准号: 456453238
• 负责人: Professor Dr.-Ing. Berend Denkena
• 金额: --
• 依托单位: Institut für Fertigungstechnik und Werkzeugmaschinen (IFW)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/456453238?language=en
• 关键词: Media; free; non; contact; multi

In the previous DFG project investigated the suitability of the technology combination of ultrasonic levitation and magnetic guidance for use as a guiding system in tool machines. The relatively high stiffness of the guide achieved with this technology combination is of particular interest for precision manufacturing. In addition, the technologies mentioned above allow active intervention in the form of positioning movements, for example for path correction in the micrometer range and for active structural and process damping. In addition, the guide works without any contact and media. Adaptive machine structures based on these technologies have considerable potential for increasing the performance of precision machines. The already researched ultrasonic levitation actuators (ULA) are, among other things, strongly limited in terms of positioning accuracy by thermally induced expansion of the actuators. The overall objective of the project therefore is the research of methods for temperature compensation and load increase in order to enable the successful application of this technology combination in cutting machine tools for precision machining. Both technologies allow active intervention in the form of positioning movements, for example for path correction in the micrometer range, as well as for active structural and process damping with the aim of increasing productivity. In addition, the technology combination works without a wrap-around and media-free. Adaptive machine structures based on these technologies have considerable potential for increasing the performance of precision machines.To achieve this objective, a model for the design of novel ULA is being developed. The model serves to describe the interaction between actuator concept, control strategy, time variance and thermal influences on the dynamic system behavior of the ULA. In addition to the increase in load-bearing capacity, the reduction of the power dissipation of the ULA and its thermal expansion is decisive for the actuator design.A trial carrier assembly for a six-dof micropositioning system is constructed and put into operation with the novel ULA. The experimental setup is used to compare and evaluate different actuator concepts and to test new control strategies. The magnetic actuators as well as the ULA are used as final control element, among other things to influence the compliance of the bearings and to dampen unavoidable system oscillations. For energy-efficient and robust control of the ULA, the developed control strategies are implemented in a new, fast hardware.

在以前的DFG项目中，研究了超声波悬浮和磁导引相结合的技术在机床中用作导向系统的适用性。通过这种技术组合实现的导轨的相对较高的刚性对于精密制造特别有意义。此外，上述技术允许以定位运动的形式进行主动干预，例如用于千米范围内的路径校正以及用于主动结构和过程减振。此外，该指南无需任何接触和媒体即可工作。基于这些技术的自适应机械结构在提高精密机械性能方面具有相当大的潜力。已有的超声悬浮执行器(ULA)的定位精度受到热致膨胀等因素的严重限制。因此，本项目的总体目标是研究温度补偿和载荷增加的方法，以使这一技术组合能够成功地应用于精密加工的切割机床。这两种技术都允许以定位运动的形式进行主动干预，例如在微米范围内进行路径校正，以及为了提高生产率而进行主动结构和工艺减振。此外，这种技术组合不需要绕圈，也不需要媒体。基于这些技术的自适应机械结构在提高精密机械性能方面具有相当大的潜力，为了实现这一目标，正在开发一种新型ULA的设计模型。该模型用于描述执行器概念、控制策略、时间变化和热影响对ULA动态系统行为的交互作用。除了提高承载能力外，降低ULA的功耗和热膨胀对执行器的设计也是至关重要的。该实验装置用于比较和评估不同的执行器概念，并测试新的控制策略。磁致动器和ULA被用作最终控制元件，以影响轴承的柔顺性并抑制不可避免的系统振荡。为了实现ULA的节能和稳健控制，开发的控制策略在一种新的、快速的硬件中实现。