Higher order statistics estimation of the modelling error for chatter monitoring

نویسندگان

  • P. Charbonnaud
  • D. Ladevèze
چکیده

This paper proposes a design method for chatter monitoring based on the fourth order statistics estimation applied to the modelling error. Usually, a test of hypothesis is built on an a priori knowledge of the statistical distribution. The frequency function is often assumed Gaussian. In the case of machining process without chatter, the Gaussian assumption is not valid. Consequently, the proposal of an adaptive estimation of the fourth cumulant on a sliding window is introduced for machining process monitoring with possible chatters. The modelling error of the cutting force is the difference between the output of nonlinear model of cutting force and a real force estimation taking into account the stiffness of the sensor. A milling process illustrates the effectiveness of the proposed chatter monitoring strategy.

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تاریخ انتشار 2008