An Active-Passive Integrated Vibration Controller Based on Piezoelectric Actuation

Abstract

The invention discloses an Initiative and passive integrated vibration controller based on piezoelectric actuation. The initiative and passive integrated vibration controller comprises a connecting piece, a vibration isolation elastic material, a supporting rod, a power vibration absorbing component and a piezoelectric actuator, wherein the end surface of the connecting piece is used for being connected with an external vibration isolation object, the axial vibration of the external electric spindle is inhibited by the power vibration absorbing component and then is transmitted to the vibration isolation object through the connecting piece; the power vibration absorbing component is axially arranged on the connecting piece through the supporting rod, the vibration isolation elastic material is arranged between the power vibration absorbing component and the connecting piece, the supporting rod is horizontally installed, so as to limit the circumferential rotation of the power vibrationabsorption component; the piezoelectric actuator is fixed on the power vibration absorption component and is positioned in the axial direction of one side of the vibration isolation object, and the axial vibration is inhibited in a semi-active mode. The vibration controller can effectively inhibit the axial vibration transmitted from a vibration source to the vibration isolation object.

Description

technical field [0001] The invention relates to the technical field of vibration control, in particular to an active-passive integrated vibration controller based on piezoelectric actuation. Background technique [0002] Due to the lack of inherent rigidity of the robot in the hole making process, it will cause vibration or even chatter under special working conditions, which will affect the hole making accuracy, quality and tool life. However, the current application of position and stiffness compensation technology can control the selective load change. The resulting pose error can be predicted and compensated, and the pressing force on the end effector can also compensate the axial drilling force. However, for the coupling vibration between the end effector and the robot body caused by various complex excitations during the hole making process, the difficulty of compensation is greatly increased. Therefore, it is very important to design a vibration controller to isolate...

AI Technical Summary

Problems solved by technology

[0003] Traditional passive vibration isolators have a narrow frequency band for vibration isolation within a certain range, and cannot respond in real time to changes in external excitations.

The main working principle of the existing boring bar vibration damping structure is: add a dynamic vibration absorber with variable stiffness inside the boring bar, and reduce the vibration of the boring bar itself by changing the stiffness of the dynamic vibration absorber, but it uses a traditional motor to connect the ball Changing the stiffness of the dynamic vibration absorber by means of a screw will result in slow response speed and the inability to adjust the stiffness in time, and its axial vibration control only has the active vibration control of the dynamic vibration absorber component, and there is no passive vibration control such as vibration isolation

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