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Regenerative cutting harmonic retrieval system dynamic response

Author: JiangYongZhou
Tutor: ZhouXiaoQin
School: Jilin University
Course: Mechanical Manufacturing and Automation
Keywords: Regenerative Cutting Systems Machining instability Harmonic Retrieval Frequency of screening High cross cumulants
CLC: TN911.7
Type: Master's thesis
Year: 2008
Downloads: 95
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Abstract


Type regenerative cutting chatter is the main vibration types in the metal cutting process, is affect machining quality, the main reason for the limit cutting efficiency. Many researchers conducted extensive research, and puts forward the concept of the limit cutting width and use cutting stability curve to control the cutting stability, as well as cutting chatter suppression by variable speed cutting method. Considering the existing of regenerative machining system research institute of harmonic parameters of dynamic response of estimation performance is poorer, is sensitive to noise, this paper proposed a new cross fourth-order cumulant based harmonic retrieval TLS - ESPRIT method; Single degree of freedom is established machining system under stochastic noise excitation of time delay dynamics model and recursive algorithm; TLS - ESPRIT method was used to study the dynamic stability problem of regenerative machining system. The simulation results show that the method can suppress mixed colored noise, harmonic parameter estimation performance is superior, the regenerative type cutting instability can be used to early diagnosis.

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