Hourglass type wide-width broadband quasi-zero stiffness electromagnetic vibration isolator

Abstract

The invention discloses an hourglass-type wide-width broadband quasi-zero-stiffness electromagnetic vibration isolator which comprises an hourglass-type frame, an annular permanent magnet part, an annular electromagnet part, a linear limiting spline, a sensor and a fastener part. The annular coil framework is fixed on the frame and has no iron core in the middle; the annular permanent magnet is installed on the annular fixing frame, and the fixing frame is fixed to the frame. The annular electromagnet part and the annular permanent magnet part are arranged in the middle of the hourglass-shaped frame, and the sensors are arranged at the top and the bottom of the frame; the limiting spline is embedded in one side of the hourglass-shaped frame, and the coil ejector rod is matched with the spline to achieve linear limiting. The hourglass-shaped frame has a macroscopic tensile expansion characteristic and a displacement amplification effect; according to the vibration isolator, the defect that the vibration isolation range of a traditional quasi-zero-stiffness electromagnetic mechanism vibration isolator is small is overcome through the displacement amplification characteristic of the hourglass type structure, and the large-range negative-stiffness stroke is achieved; the invention further provides an active negative stiffness algorithm of the vibration isolator, and the vibration isolation performance with good robustness can be achieved.

Description

technical field [0001] The invention belongs to the technical field of vibration control, and mainly relates to an electromagnetic vibration isolator, in particular to an hourglass type wide width and frequency quasi-zero stiffness electromagnetic vibration isolator. Background technique [0002] In aerospace, precision instrument engineering and other fields, harmful vibration will cause equipment damage and affect the accuracy of equipment. Especially for low-frequency vibration, conventional vibration control methods are difficult to achieve effective control. Therefore, it is of great engineering significance to realize broadband vibration control. Vibration isolation is generally divided into: active vibration isolation, passive vibration isolation, semi-active vibration isolation and active and passive integrated vibration isolation. Among them, passive vibration isolation has high reliability and is easy to implement, but it cannot achieve good low-frequency vibratio...

AI Technical Summary

Problems solved by technology

However, when the active quasi-zero stiffness vibration isolator is used for vibration isolation, the quasi-zero stiffness travel is generally relatively small, which greatly limits the application scenarios of the quasi-zero stiffness vibration isolator

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