PASSIVE VIBRATION CONTROLLER AND PASSIVE NOISE CONTROLLER

摘要

PURPOSE:To decrease an error when a reference process signal required for the update arithmetic of an adaptive digital filter is calculated without causing any large increase in arithmetic load, etc. CONSTITUTION:A timer is cleared to zero and started in a step 105 right after a filter coefficient Wi is outputted as a driving signal (y) in a step 104 and when it is decided in a step 109 that a reference signal (x) is inputted, an advance to a step 113 is made to set the value, obtained by the value of the time at this time by the time interval of a sampling clock, as a fraction ED. In a step 102, the filter coefficient of a transfer function filter to be added when a reference process signal RT is calculated is selected on the basis of the fraction ED.