Electromagnetic quasi-zero stiffness vibration isolation system based on Stewart platform

Abstract

The invention discloses an electromagnetic quasi-zero stiffness vibration isolation system based on the Stewart platform. The electromagnetic quasi-zero stiffness vibration isolation system based on the Stewart platform comprises an upper platform and a lower platform, the upper platform and the lower platform are oppositely arranged, six vibration isolation devices are arranged between the upperplatform and the lower platform, six vibration isolation devices are arranged according to a Stewart platform mode, a first diaphragm spring is arranged at one ends of the vibration isolation devicesin a sleeved mode, the other end of the vibration isolation device is sleeved with a second diaphragm spring, each vibration isolation device comprises a guide shaft, a magnet set is arranged on the outer side of the guide shaft, a coil set is arranged on the outer side of the magnet set, a gap is formed between the magnet set and the coil set, and an outer cylinder is arranged on the outer side of the coil set. According to the electromagnetic quasi-zero stiffness vibration isolation system, the adjustable nonlinear negative stiffness is realized by utilizing the mutual acting force between the permanent magnet and the conductive coil, the first diaphragm spring and the second diaphragm spring provide positive rigidity, and the quasi-zero rigidity near the working position is achieved through combination of positive and negative rigidity; the electromagnetic quasi-zero stiffness vibration isolation system has the advantages of being simple in structure, the rigidity is controllable and the like, the inherent frequency of the vibration isolation system is effectively reduced, and further the vibration isolation frequency band is widened.

Description

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AI Technical Summary

Benefits of technology

In this new design for electronic devices that use elastic mounts or shock absorbers, there are two main technical features: one being improved stability during operation by reducing unwanted movement caused when they hit other objects; another improving performance through reduced resonance frequencies due to increased flexibility at different positions within its range.

Problems solved by technology

The technical problem addressed in this patented text relates to controlling vibrations caused by external sources during machining operations without consuming too much power while still maintaining precise performance levels over time. This can be challenged because conventional systems often require multiple components with complicated structures that increase their weightiness and costs compared to passively isolated devices like lenses used in astronomy telescopic imagery.

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