PURPOSE: To set the frequency as a dynamic vibration reducer to a necessary frequency according to the vibration of a vibration reduced material by providing an automatic tuning control device consisting of an arithmetic processing unit of detection signal from a vibration detecting part and a solenoid valve control driving system for driving an air feeding and exhausting means according to the processing result.
CONSTITUTION: The vibration of an upper structure 8 is detected by a vibration detecting part 11, the frequency of the upper structure 8 is calculated by a frequency control part 13, and the both are processed by an arithmetic processing part 14, whereby a pressure corresponding to the frequency of the upper structure 8 is calculated. On the other hand, the average pressure of an air chamber 3 is detected by a pressure detecting end 6 and a pressure detecting part 12, and this pressure is compared with the pressure calculated in the arithmetic processing part 14, and solenoid valves 5, 5' are operated by a solenoid valve drive control part 15 and a solenoid valve driving device 16 in such a manner that the both pressures are equal to each other. The pressure in the air chamber 3 is automatically set to a necessary pressure corresponding to the vibration of the upper structure 8, and by making the frequency as a dynamic vibration reducer coincident with the frequency of the upper structure 8, the vibration of the upper structure 8 can be reduced by the dynamic vibration reducing effect.
FUJITA KAZUMASA
KANAMORI KYOZO
MIMORI SHIGEMI
| JP1065435B | ||||
| JPS63243544A | 1988-10-11 |