A low frequency horizontal vibration reduction method for a vehicle-borne photoelectric instrument
DU Ning1, HU Mingyong2, BI Yong3, ZHU Qingsheng1#br#
1.Nanjing Research Centre of Astronomical Instruments,University of Chinese Academy of Sciences,Nanjing 210042,China;
2.Academy of Photoelectric Technology,Hefei University of Technology,Hefei 230009,China;
3.CAS Nanjing Astronomical Instruments Co.,Ltd.,University of Chinese Academy of Sciences,Nanjing 210042,China
In order to reduce the vibration of a photoelectric equipment in a large vehicle within a the frequency range of 0-20Hz,considering its load-bearing capacity and the vehicle space,a method of low frequency horizontal vibration isolation was put forward.This method was based on the theory of vibration isolation in a quasi-zero stiffness system.A new vibration isolation system was constructed with a positive stiffness and a negative one parallel connection by merging a new negative stiffness mechanism to a positive stiffness spring.Through analyzing the principle and the dynamic characteristics of the vibration isolation system,the zero stiffness condition was obtained at the equilibrium position of the system.The modal analysis simulations were conducted for the vibration response of the vehicle-borne photoelectric instrument with the new vibration isolation system.The theoretical analysis and simulation results showed that the new system has a significant effect on the low frequency vibration reduction of the equipment without changing its load-bearing capacity; the vibration amplitude within the range of 0-20Hz is reduced 96.67%.Finally,the vehicle-borne photoelectric instrument with the new vibration isolation system was tested,it was shown that this new vibration isolation system has a good effect on the low frequency vibration reduction of the equipment.
杜宁,2，胡明勇3，毕勇4,朱庆生1. 一种车载设备的低频水平减振方法[J]. 振动与冲击, 2017, 36(7): 184-190.
DU Ning1, HU Mingyong2, BI Yong3, ZHU Qingsheng1. A low frequency horizontal vibration reduction method for a vehicle-borne photoelectric instrument. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(7): 184-190.
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