Fundamental investigation of the modal control of temperature fields with the application on machine tool structures

温度场模态控制的基础研究及其在机床结构上的应用

• 批准号: 468584574
• 负责人: Professor Dr.-Ing. Steffen Ihlenfeldt
• 金额: --
• 依托单位: Institut für mechatronischen Maschinenbau
• 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/468584574?language=en
• 关键词: Fundamental; investigation; modal; control; temperature

Thermal displacement is a significant reason for geometric errors of machine tools. Energetic losses of the electric drives, the machining process and the ambient temperature lead to a rise of the machine temperature and consequently to an expansion of the material. Especially an uneven temperature distribution in the structure leads to large displacements. An example is a machine Frame that is caused to bend by an asymmetric heat source.An object of this project is the design and the analyses of a methodology for the manipulation of temperature fields in structural components. For this purpose, the thermal state of the machine is measured during operation and manipulated by thermal actuators (heating or cooling elements). This represents a multi-variable feedback control in which a strong coupling between all in- and outputs of the system arise. To focus the challenges of this distributed heat conduction problem, this research deals with the method of thermal modal analysis, which enables a decoupled state space description of the system. The overall goal of the project is to analyse the potential of the modal temperature field control in terms of the reduction of thermally induced machining errors.

热位移是引起机床几何误差的重要原因。电驱动的能量损失、加工过程和环境温度导致机器温度升高，从而导致材料膨胀。特别是结构中的不均匀温度分布导致大的位移。一个例子是一个由不对称热源引起弯曲的机器框架。这个项目的一个目标是设计和分析一种操纵结构部件温度场的方法。为此，在运行期间测量机器的热状态，并通过热致动器（加热或冷却元件）进行操纵。这表示多变量反馈控制，其中系统的所有输入和输出之间出现强耦合。为了解决这一分布式热传导问题，本研究采用热模态分析方法，对系统进行解耦状态空间描述。该项目的总体目标是分析模态温度场控制在减少热致加工误差方面的潜力。