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双电机消隙这一技术的引入为重型数控机床进给系统的高精度传动提供了一种可靠的解决方案。针对目前双电机消隙动态定量效果评价方法缺乏的问题,提出了基于改进HHT的双电机消隙进给系统消隙状态定量识别技术。以进给系统电流变化作为检测技术,实现在不干扰生产的同时获得高信噪比的测试信号。以EEMD和Hilbert局部能量谱对传统HHT进行改进并作为电机电流信号处理技术,解决了电流信息的非平稳和非高斯分布问题,实现了对双电机消隙的消隙状态进行定量化识别。仿真和实验验证了该方法的有效性。
The introduction of double-motor anti-backlash technology provides a reliable solution for high-precision drives in heavy CNC machine tool feed systems. In order to solve the problem of the lack of evaluation method of double-motor dynamic elimination effect, a quantitative identification technology of double-motor clearance elimination system based on improved HHT is proposed. To feed the system current as a detection technology, to achieve without disturbing the production of high signal to noise ratio of the test signal. Based on EEMD and Hilbert local energy spectrum, the traditional HHT is improved and used as the motor current signal processing technology to solve the problem of non-stationary and non-Gaussian distribution of current information and to quantitatively identify the anti-skid state of double-motor anti-skidding. Simulation and experiment show the effectiveness of the method.