基于FFT的数控镂铣机传动链误差源诊断

分析了造成数控镂铣机传动链误差的原因，在检测中采用快速傅里叶变换（FFT）算法对模拟信号进行频谱分析．为了提高计算的精度、降低对采样频率的要求，提高运算速度，采用一种基于线性插值原理的改进快速傅里叶变换（L—FFT）算法．用此算法对传动链误差的原始数据进行处理，诊断出误差源及位置，为降低传动误差的控制算法提供了依据．试验结果表明，与FFT算法相比，效率提高大约5％，表明该算法具有一定的实用性和有效性．

Research on Transmission Error Resource Diagnosis of CNC Router Based on FFT Algorithm

According to properties of TE(transmission error) in the CNC router,the FFT(fast fourier transform) algorithm was proposed to carry out spectrum analysis for transmission error data.In order to increase analyzing accuracy and reduce the demand to sampling frequency for saving computation time,an improved FFT algorithm based on linear interpolation was adopted to improve the performance of the FFT.Experiments on a CNC router TE diagnoses are applied,and the experiment results show its practicability and vali...