PURPOSE: To eliminate the influence of vibration from other than an engine so as to perform accurate vibration reduction control by detecting vehicle vibration from other than the engine, and correcting a convergence factor to a smaller value when the vehicle vibration is greater than a predetermined value.
CONSTITUTION: A control means 22 receives a reference signal based on vibration of engine 2 and a signal of a vehicle vibration detection means 11 and, according to the reference signal, produces a signal for causing vibration of a specific vibrating element of a vehicle in the opposite phase to and at the same amplitude as vehicle vibration. A convergence factor setting means 32 sets a factor so that the signal from the detection means 11 is made small and a drive signal is subjected to feedback correction so as to control an actuator 3. In this case, the vehicle vibration other than that of the engine 2 is detected by a detection means 12 as disturbance and a correction means 36 causes the convergence factor setting means 32 to correct the factor to a smaller value when the vehicle vibration is greater than a predetermined value. Renewal of numerical control values is therefore achieved in a small width, and even if the disturbance is great, turbulence of control can be prevented and vibration reduction control can be performed accurately.
IKEDA NAOKI
SENI HIROSHI
NAKAO NORIHIKO
MITSUFUJI CHIAKI
TSUKAHARA YUTAKA
HARADA SHINGO
