公开(公告)号：US20190170209A1

公开(公告)日：2019-06-06

申请号：US16321002

申请日：2017-07-25

Applicant: Japan Aerospace Exploration Agency

Inventor： Yasutoshi HYAKUSOKU ,  Takafumi KAJIKAWA ,  Qinzhong SHI ,  Daichi TODAKA

IPC: F16F15/08 ,  F16F3/08 ,  F16F13/26 ,  F16F1/36

Abstract: Provided is an adjusting method for a resonance frequency of a vibration isolator, the vibration isolator including first to n-th elastic member groups and/or an n+1-th elastic member group, the first to n-th elastic member groups and/or the n+1-th elastic member group being located on an xy plane of an xyz coordinate system, and an xy coordinate system of the xyz coordinate system being a coordinate system obtained by, when a tensor of inertia I with respect to an XYZ coordinate system having an origin in a center of gravity of a vibration sensing side structure or a vibration source side structure is represented as I, rotating an XY coordinate system by θ=tan−1(2IXY/(IXX−IYY)) around a Z axis, the adjusting method including, when rigidity Ki of the first to n-th elastic member groups is represented as [ K i ] = [ k i  _  xx 0 0 0 k i  _  yy 0 0 0 k i  _  zz ] , rigidity Kn+1 of the n+1-th elastic member group is represented as [ K n + 1 ] = [ k n + 1  _  xx 0 0 0 k n + 1  _  yy 0 0 0 k n + 1  _  zz ] , and an x coordinate and a y coordinate of the first to n-th elastic member groups are represented as rpi_x and rpi_y, while satisfying Σki_xxrpi_x=Σki_yyrpi_y=0 and Σki_yyrpi_xrpi_y=Σki_xxrpi_xrpi_y=0, at least one step of a step of adjusting positions of the first to n-th elastic member groups such that values of Σ(ki_zzrpi_y2), Σ(ki_yyrpi_x2), and Σ(ki_zzrpi_y2+ki_yyrpi_x2) change and respectively shifting resonance frequencies of x, y, and z-axial rotational motions and a step of arranging the n+1-th elastic member group at an origin of the xyz coordinate, adjusting values of kn+1_xx, kn+1_yy, and kn+1_zz, and respectively shifting resonance frequencies of x, y, and z-direction translational motions.