CAJ | 학술논문

获取加工系统模态参数是进行铣削加工过程动力学仿真的先决条件。利用实验模态分析技术对机床-刀具系统或机床-工件系统进行锤击实验，通过力传感器和压电式加速度计采集激励与响应信号，再通过傅里叶变换和频响函数估算的方法获得加工系统的频响函数，最后通过正交多项式参数拟合获得工艺系统的模态参数。动力学特性参数测试分析结果，可为铣削过程动力学仿真提供所必须的可信数据。
획취가공계통모태삼수시진행선삭가공과정동역학방진적선결조건。이용실험모태분석기술대궤상-도구계통혹궤상-공건계통진행추격실험，통과력전감기화압전식가속도계채집격려여향응신호，재통과부리협변환화빈향함수고산적방법획득가공계통적빈향함수，최후통과정교다항식삼수의합획득공예계통적모태삼수。동역학특성삼수측시분석결과，가위선삭과정동역학방진제공소필수적가신수거。
Obtaining modal parameters of a cutting system is essential for conducting dynamic simulation of milling process. The experimental modal analysis technology (EMA) is used for hammering test on a machine-tool system or a machine-workpiece system, excitation and response signals are measured and acquired by force transducer and piezoelec-tric accelerometer respectively; Then, the frequency response function of the system is obtained by Fourier transform and the frequency response function estimation method; Lastly, the modal parameters of the system are identified through orthogonal polynomial fitting method. The analysis result of dynamic characteristic parameters can provide necessary reliable data for dynamic simulation of milling process.