【作者】 庹艾莉；

【导师】 陈幼平； 袁楚明；

【作者基本信息】 华中科技大学 ， 机械电子工程， 2005， 硕士

【摘要】 数控机床运动学和动力学建模研究是实现数控系统网络化和实现数控设备远程监控的基础,模型的仿真优化对提高网络化和监控精度又有着重大的理论和实践意义。本文针对数控机床运动学和动力学性能研究的特点,结合虚拟样机技术在系统仿真分析上的优势,提出了基于虚拟样机技术的动态性能仿真系统实现方案。主要完成了以下的工作: 1、在对数控机床动态性能仿真系统分析的基础上,引入了虚拟样机技术作为性能仿真系统实现的核心技术,并对仿真系统的总体方案进行了研究。2、针对数控机床运动系统的特点,研究了机械运动学建模方法,建立了数控机床运动系统的通用运动学模型。3、研究了机械系统中摩擦的非线性特性及不同摩擦模型的特点。并根据机床运动系统中摩擦的特点,建立了基于Karnopp 模型的摩擦非线性模型。4、分析了两种工程软件ADAMS 和Pro/Engineer 的特点,研究了二者的无缝连接。通过此无缝连接接口将CAD 模型和仿真模型有机连接在一起,初步建立了数控机床运动学和动力学仿真系统。利用该系统对数控机床加工过程进行仿真,验证了所建立的运动学和动力学模型的正确性,并研究了摩擦对运动系统的影响。更多还原

【Abstract】 In order to realize networked and remote control of CNC systems, it is the basic work to build a kinematics and dynamic model of CNC machine tools and it is of great theoretical and practical significance to optimize the model through simulation. According to the kinematics and dynamic characteristics of machine tools, with the consideration of the advantages of virtual prototype technology on system analysis, a systematic scheme is provided. On the basis of analyzing the dynamic performance of machine tools, the virtual prototype technology is regarded as the key technology of the performance simulation system. The systematic scheme of such a simulation system is also studied. After comparing several modeling methods, a kinematics model is built according to the characteristics of the kinematics scheme and the modeling theory. The nonlinear characteristics of friction in mechanical system are analyzed. And then different friction models are compared. According to the characteristics of friction in servo-drive systems, an effective friction model is developed referring to the Karnopp model. On the basis of the characteristic analysis of the two engineering software ADAMS and Pro/Engineer, an CAD model of CNC machine tools and an ADAMS simulation model are designed to be integrated through MECHANISM/Pro. Then an CNC simulation system is developed in the ADAMS/View environment. Whether the kinematics model is correct or not and the influence of friction force to positioning accuracy are analyzed in this simulation environment by simulating the performance of an CNC system.更多还原