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    • 1. 发明授权
    • Teager-based method and system for predicting limit cycle oscillations
and control method and system utilizing same
    • 基于Teager的方法和系统,用于预测极限循环振荡及其控制方法及系统
    • US6004017A
    • 1999-12-21
    • US848316
    • 1997-04-30
    • Poovanpilli G. Madhavan
    • Poovanpilli G. Madhavan
    • G05B5/01H03D13/00
    • G05B5/01
    • A data-driven method and system are provided for predicting limit cycle oscillations such as chatter to obtain a classifier signal which, in turn, may be utilized by a control method and system. The method and system utilize newly-developed algorithms based on Teager algorithm which are applied to "vibration" data to predict when chatter phenomenon may emerge during an ongoing machining process. Using real data from a turning operation on a lathe, the onset of chatter can be predicted so that sufficient time is available to deploy an automatic control strategy such as reduction or random variation of spindle speed to quench the "chatter". The method and system preferably use the generalized Teager measure.
    • 提供了一种数据驱动方法和系统,用于预测限制周期振荡,例如颤振,以获得分类器信号,进而可以由控制方法和系统使用。 该方法和系统利用基于Teager算法的新开发的算法,应用于“振动”数据,以预测在正在进行的加工过程中可能出现颤振现象。 使用车床上的车削操作的实际数据,可以预测颤动的开始,以便足够的时间可用于部署自动控制策略,例如主轴速度的减小或随机变化以淬灭“颤动”。 该方法和系统优选地使用广义Teager测量。
    • 2. 发明授权
    • Method and system for predicting limit cycle oscillations and control
method and system utilizing same
    • 用于预测极限循环振荡的方法和系统及其利用方法和系统
    • US5784273A
    • 1998-07-21
    • US745014
    • 1996-11-07
    • Poovanpilli G. Madhavan
    • Poovanpilli G. Madhavan
    • G05B5/01G05B13/02
    • G05B5/01
    • A data-driven method and system are provided for predicting limit cycle oscillations such as chatter to obtain a classifier signal which, in turn, may be utilized by a control method and system. The method and system utilize algorithms based on random field theory which are applied to "vibration" data to predict when chatter phenomenon may emerge during an ongoing machining process. Using real data from a turning operation on a lathe, the onset of chatter can be predicted so that sufficient time is available to deploy an automatic control strategy such as reduction or random variation of spindle speed to quench the "chatter". The method and system preferably use instantaneous scale of fluctuation.
    • 提供了一种数据驱动方法和系统,用于预测限制周期振荡,例如颤振,以获得分类器信号,进而可以由控制方法和系统使用。 该方法和系统利用基于随机场理论的算法,应用于“振动”数据,以预测在正在进行的加工过程中可能出现颤振现象。 使用车床上的车削操作的实际数据,可以预测颤动的开始,以便足够的时间可用于部署自动控制策略,例如主轴速度的减小或随机变化以淬灭“颤动”。 该方法和系统优选地使用瞬时的波动规模。