| 摘要 |
PROBLEM TO BE SOLVED: To compute a transfer fuction, required to reduce vibration, in a short time and with high accuracy without complicated arithmetic processing by identifying the transfer fuction using identification signals generated by discrete sine wave. SOLUTION: When a worker operates an identification processing start switch 28 at the time of periodic inspection, transfer function identification processing is executed in a controller 25. A sequence of sine waves of one cyle digitized at equal spaces is therefore stored in the controller 25. In the controller 25, each numerical value of this sequence is supplied in order as an identification signal to an electromagnetic actuator of an active engine mount 1 synchronously with an output sampling clock to generate identification signals, and the vibration is detected as a residual vibration signal (e) by a load sensor. The residual vibration signal (e) is further converted into the digital value synchronously with an input sampling clock and taken in, and the residual vibration signal (e) is Fourier-transformed to extract a component corresponding to the frequency of the identification signal. |
