Quasi-zero stiffness vibration isolation and energy collection system based on Stewart platform

Abstract

The invention discloses a quasi-zero stiffness vibration isolation and energy collection system based on a Stewart platform and relates to the technical field of vibration isolation. The system devicecomprises an upper platform, a lower platform and six supporting legs. Each supporting leg comprises an outer sleeve, a connecting rod, a guide rod, an electromagnet, a first annular permanent magnet, a coil, a second annular permanent magnet and a diaphragm spring, wherein the first annular permanent magnet, the coil, the second annular permanent magnet and the diaphragm spring are up-down successively fixed in the outer sleeve. A first guide part is arranged in the first annular permanent magnet. A second guide part is arranged in the second annular permanent magnet. The guide rod is sleeved in the first guide part and the second guide part. The lower end of the guide rod is fixedly connected with the diaphragm spring. The electromagnet is fixed to the guide rod and arranged in a spaceformed by enclosing the first annular permanent magnet, the second annular permanent magnet and the coil. The upper end of the guide rod is connected with the upper platform through a hinge piece. Thelower end of the connecting rod is connected with the lower platform through a hinge piece. According to the system, rigidity is adjustable, low-frequency vibration can be well restrained, energy collection is achieved, and energy can be input to the outside.

Description

technical field [0001] The invention relates to the technical field of vibration isolation, in particular to a quasi-zero stiffness vibration isolation and energy collection system based on a Stewart platform. Background technique [0002] In the field of aerospace technology, aerospace equipment is developing towards precision. The low-frequency vibrations generated in the spacecraft will affect the stability of these precision instruments. At the same time, during the launch phase, the power of the spacecraft is cut off, the sensors cannot be effectively monitored, and the actuators have neither feedback signals nor energy drives. Therefore, the vibration control during the launch of the spacecraft has become an inevitable focus and difficulty. For low-frequency vibration isolation, researchers at home and abroad use various forms of negative stiffness structures to reduce the stiffness of the vibration isolation system, thereby reducing the natural frequency and expandin...

AI Technical Summary

Problems solved by technology

In terms of single-degree-of-freedom vibration isolation, there have been many related studies on quasi-zero-stiffness vibration isolators, but in terms of six-degree-of-freedom vibration isolation that is more in line with reality, there are few researches on quasi-zero-stiffness vibration isolation

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