Design of an ultra-precision vibration isolation system by imitating the special organic texture of woodpecker´s brain

In this paper, a bionic structure model of ultra-precision vibration isolation system is presented by imitating the special organic texture of woodpecker´s brain. The vibration isolation system mainly consists of giant magnetostrictive actuators, air-springs, a pedestal and a rubber layer. The air-springs are used to reduce high frequency vibrations, and the giant magnetostrictive actuators are used to reduce low or ultra-low frequency vibrations. In order to reduce thermal distortion caused by temperature rise of coil, a constant temperature cooling system is developed for giant magnetostrictive actuator. In consideration of complex vibration environment and self-nonlinearity of vibration isolation system, a two dimensional fuzzy active control system with two regulation factors is designed. The experiment results show that the bionic vibration isolation system has good performance against floor disturbances. It can be applied to the vibration isolation system of the ultra-precision measuring and manufacturing devices.