×

Active vibration reducing apparatus and method for identifying transfer function in active vibration reducing apparatus

  • US 6,018,689 A
  • Filed: 11/06/1997
  • Issued: 01/25/2000
  • Est. Priority Date: 11/08/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. An apparatus for actively reducing a vibration, comprising:

  • a vibration developing source;

    a controlled vibration source arranged so as to be enabled to develop a controlled vibration to be interfered against the vibration developed from the vibration developing source;

    a reference signal generator for detecting a vibration developed condition of the vibration developing source and generating and outputting the detected vibration developed condition as a reference signal;

    a residual vibration detector for detecting a residual vibration after the interference of the controlled vibration against the vibration developed from the vibration developing source;

    a controller for driving the controlled vibration source to reduce the vibration developed from the vibration developing source using a control algorithm including a transfer function established between the controlled vibration source and the residual vibration detector on the basis of the reference signal and the residual vibration signal;

    an identification signal supplier for sequentially supplying individual discrete values of an identification signal which is a quantization of a time-continuous sinusoidal wave equally divided by a predetermined number to the controlled vibration source in synchronization with a predetermined output sampling clock;

    a response signal reader for reading the residual vibration signal in synchronization with a predetermined input sampling clock when an identification vibration responding to the identification signal is developed from the controlled vibration source;

    a transfer function identifier for identifying the transfer function included in the control algorithm on the basis of the residual vibration signal read by the response signal reader; and

    a period setter capable of setting individually and independently periods of the predetermined output and input sampling clocks.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×