Vibration control device and control method therefor

Abstract

Provided is a vibration control device, which enables the vibrations of a vibrating body, such as a rotary machine, to automatically be suppressed, without installing a vibration detection sensor on the vibration control device or vibrating body, and without controlling the rotational speed or phase of the vibration control device. The vibration control device (1), which is installed on a vibrating body (2) and controls the vibrations of the vibrating body (2), comprises a rotating shaft (11), a mass body (12) that is fixed to the rotating shaft (11), and an activation apparatus (13) that adds the power of a rotational motion, which is centered on the rotating shaft (11), to the mass body (12).

Description

technical field [0001] The invention relates to a damping device installed on a vibrating body to suppress its vibration and a control method thereof. Background technique [0002] Rotating machines such as hard disks, fans, cutting devices, and turbines for power generation in personal computers are designed to minimize unbalance, and are carefully balanced before shipment. However, since there is a limit to the trimming of the rotary machine, a centrifugal force-type external force is generated during operation to generate vibration. In addition, there are devices such as electric washing machines that inevitably generate a large imbalance in their performance during operation, and machines that inevitably generate a certain degree of vibration in the structure of reciprocating machines such as engines. In order to suppress the vibration of these machines (hereinafter referred to as vibrating bodies), an automatic balancer or a vibration absorber has been proposed (for ex...

AI Technical Summary

Problems solved by technology

First, the automatic balancer has the problem of amplifying the vibration amplitude of the machine in the vibration frequency (frequency) region lower than the resonance frequency (or resonance point)

[0007] Second, the automatic balancer has the problem of self-excited vibration in the vibration frequency region higher than the resonance point

That is, although the automatic balancer has the function of automatically suppressing vibration, it may amplify the vibration of the machine because it cannot actively control the balance corrector, etc.

[0008] Third, the vibration absorber requires a delicate motor and a complicated control mechanism, so there is a problem of high cost

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