GOALI/IUCP: Evaluation of Dynamic Performance of Hexapod Machine Tools

本GOALI项目的目标是通过建立建模和系统参数识别方法来识别和表征六足机床的动态性能。该方法结合了一个协调的三管齐下的方法，实验，分析和调节/验证。有限元建模将用于指导实验和验证结构动力学模型。有限元建模和刚体/集总参数建模都有助于识别关键系统参数、平台配置、回转轨迹、传感器位置和激励类型。构件模态综合技术将结构动力学和刚体/集总参数模型结合成六足机床动力学的整体模型。六足机床模型的增强和协调将使用参数估计技术进行。研究工作计划包括理论建模和仿真，以及在桑迪亚国家实验室进行的一系列实验，然后在桑迪亚的两种六足机床上全面实施该方法。来自该项目的工业咨询委员会的意见将促进测试、标准化和基准测试。该研究为六足机床动力学模型的建立提供了一种系统的方法。这为六足机床作为一种新的加工范例在工业上的广泛采用奠定了基础。

DMI-9800806 Wiens The objectives of this GOALI project are to identify and characterize the dynamic performance of hexapod machine tools by establishing a method for modeling and system parameter identification. The method incorporates a coordinated three-pronged approach of experiments, analysis, and reconciliation/validation. Finite element modeling will be used to guide the experimentation and validate the structural dynamic model. Both finite element modeling and rigid body/lumped parameter modeling facilitate the identification of critical system parameters, platform configurations, slewing trajectories, sensor locations, and type of excitation. Component mode synthesis techniques will be used to combine the structural dynamics and rigid body/lumped parameter models into an overall model of the hexapod machine tool dynamics. Augmentation and reconciliation of the hexapod machine tool models will be performed using parameter estimation techniques. The research work plan involves theoretical modeling and simulation, and a series of experiments conducted at Sandia National Laboratories followed by full implementation of the method on both of hexapod machine tools at Sandia. Input from the project's industrial advisory committee will facilitate testing, standardization, and benchmarking. The research will provide a systematic method for generating a validated dynamic model of hexapod machine tools. This forms a basis for possible widespread adoption of hexapod machine tools as a new machining paradigm in industry.