Electromagnetic Negative Stiffness Vibration Isolation System Based on Piezoelectric Self-Power Supply and Its Control Method

Abstract

The invention discloses an electromagnetic negative stiffness vibration isolation system based on piezoelectric self-power supply and a control method thereof, and relates to the technical field of vibration suppression. The electromagnetic negative stiffness vibration isolation system based on piezoelectric self-power supply comprises a base, a cylinder, an electromagnetic negative stiffness assembly, a fixing base, a piezoelectric energy capture assembly, a load platform and a circuit system; the lower end of the electromagnetic negative stiffness assembly is connected with the base, the upper end of the electromagnetic negative stiffness assembly extends out of the upper surface of the fixing base, the piezoelectric energy capture assembly is fixed at the upper end of the electromagnetic negative stiffness assembly, and the load platform is arranged at the upper end of the piezoelectric energy capture assembly; and the piezoelectric energy capture assembly is connected with the input end of a rectifying circuit, the output end of a control circuit is connected with the electromagnetic negative stiffness assembly, and a rechargeable battery is used for supplying power to the rectifying circuit, a DC-DC voltage conversion circuit, an energy storage circuit and the control circuit. The system can effectively reduce the natural frequency of the system, not only has a good vibration isolation effect on high-frequency vibration interference, but also can effectively isolate low-frequency vibration of a foundation and the environment, and has the characteristics of self-power collection, power storage and power supply.

Description

technical field [0001] The invention relates to the technical field of vibration suppression, in particular to an electromagnetic negative stiffness vibration isolation system based on piezoelectric self-power supply and a control method thereof. Background technique [0002] With the continuous development of precision engineering technology, in the research fields of precision machining, precision measurement and space microgravity, more and more strict requirements are put forward for the isolation of external broadband environmental vibration. The traditional vibration isolation system mainly uses the spring and damper structure with fixed parameters to complete the vibration reduction of the controlled object, which has the characteristics of simple structure, reliable operation, and independent of power supply. It can meet the production requirements in general industrial occasions, but the effect of isolating low-frequency and ultra-low-frequency vibrations is not ide...

AI Technical Summary

Problems solved by technology

It can meet the production requirements in general industrial occasions, but the effect of isolating low-frequency and ultra-low-frequency vibrations is not ideal

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