摘要
爬行现象是一种数控机床在工作中经常发生的不稳定的工作状况,极大的影响着零件加工质量和机床的使用寿命。首先简述进给系统工作过程,分析爬行现象产生机理,建立进给系统运动简单物理模型,并通过Adams建模进行仿真。然后使用Matlab/Simulink建立超磁致伸缩致动器(GMA)激励系统动态力学模型,实现Matlab和Adams的联合仿真。通过控制超磁致伸缩致动器的驱动电流,实现对致动器输出力的实时控制。将GMA的输出力施加丝杠轴向上,观察在不同频率和幅值的驱动电流作用下工作台运动状态的变化,验证了使用外加正弦激励抑制爬行现象方法的可行性。
Stick-slip phenomenon is a common unstable working condition of CNC machine tools,greatly affects the machining quality of parts and the CNC service life. First,the process of feed system was described and the machanism of stick-slip phenomenon was analysised. Then,the feed system physical model was built and simulated by Adams. After that,the GMA excitation system dynamic mechanics model was built,realizing the coordinated simulation of Matlab and Adams.Achieving the real-time control of the actuator output through the control of the GMA drive electric current. The output force of GMA was imposed on the screw. Observing the change of workbench motions under the action of different frequency and amplitude of the drive current. The feasibility of the method based on sinusoidal excitation to suppress the stick-slip phenomenon was verified.
作者
尹明
晁佳佳
YIN Ming;CHAO Jia-jia(School of Mechanical Engineering, Inner Mongolia University of Science & Technology, Inner Mongolia Baotou 014010, China)
出处
《机械设计与制造》
北大核心
2019年第8期150-152,156,共4页
Machinery Design & Manufacture
基金
精密机床传动系统变形误差动态修正方法研究(2011MS0719)
