CAJ | 학술논문

排列熵是系统复杂性和规则性的一种测度，具有概念简单、稳健和计算速度快等优点。考虑到单尺度排列熵在反映铣削力信号特征方面的不足，通过试验分析提出基于单尺度排列熵和尺度4排列熵作指标的铣削颤振在线检测方法。通过试验验证，所提出的方法能有效地检测铣削颤振。同时基于多尺度排列熵的方法对于铣削力信号采集过程中的噪声、工艺参数变化等不敏感，因此这种方法适用于实际工业生产中的在线铣削颤振监测。
배렬적시계통복잡성화규칙성적일충측도，구유개념간단、은건화계산속도쾌등우점。고필도단척도배렬적재반영선삭력신호특정방면적불족，통과시험분석제출기우단척도배렬적화척도4배렬적작지표적선삭전진재선검측방법。통과시험험증，소제출적방법능유효지검측선삭전진。동시기우다척도배렬적적방법대우선삭력신호채집과정중적조성、공예삼수변화등불민감，인차저충방법괄용우실제공업생산중적재선선삭전진감측。
Permutation entropy of a time series is a conceptual simple, robust and extremely fast complexity measure method for distinguishing conditions of a physical system. Considering the deficit of single scale permutation entropy in reflecting the specifics of milling force signals, a milling chatter on-line detection method based on indictors of single scale permutation entropy and scales 4 permutation entropy is proposed through experimental analysis. The experimental results show that this method can identify the chatter accurately and effectively. Meanwhile, this method is insensitive to noise and process parameters variation. Therefore, multi-scale permutation entropy based method possesses excellent potential for practical and on-line application.