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

GOALI项目的目标是通过建立建模和系统参数识别的方法来识别和表征六足机床的动态性能。 该方法采用了协调的三管齐下的实验，分析和和解/验证的方法。 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/集总参数建模便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。 组件模式综合技术将被用来联合收割机的结构动力学和刚体/集总参数模型到一个整体模型的六足机床动力学。 将使用参数估计技术对六足机床模型进行增强和协调。 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，然后在桑迪亚的两台六足机床上全面实施该方法。该项目的工业咨询委员会的投入将促进测试、标准化和基准测试。 该研究为建立六足机床的有效动力学模型提供了一种系统的方法。这为六足机床作为工业中新的加工范例的可能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.