US 11,692,607 B2
Magnetic suspension type sensing system for space full-degree-of-freedom absolute poses
Huayan Pu, Chongqing (CN); Yan Jing, Chongqing (CN); Jinglei Zhao, Chongqing (CN); Jun Luo, Chongqing (CN); Yi Qin, Chongqing (CN); Zhijiang Xie, Chongqing (CN); and Jie Ma, Chongqing (CN)
Assigned to Chongqing University, Chongqing (CN); and SHANGHAI UNIVERSITY, Shanghai (CN)
Filed by Chongqing University, Chongqing (CN); and Shanghai University, Shanghai (CN)
Filed on Nov. 26, 2021, as Appl. No. 17/535,747.
Claims priority of application No. 202110891549.4 (CN), filed on Aug. 4, 2021.
Prior Publication US 2023/0045158 A1, Feb. 9, 2023
Int. Cl. F16F 15/00 (2006.01); F16F 15/03 (2006.01); H02N 15/00 (2006.01); G01H 11/02 (2006.01)
CPC F16F 15/002 (2013.01) [F16F 15/03 (2013.01); G01H 11/02 (2013.01); H02N 15/00 (2013.01); F16F 2230/14 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A magnetic suspension type sensing system for space full-degree-of-freedom absolute poses, the system comprising:
a reference platform;
a plurality of quasi-zero stiffness supporting legs; and
a platform to be tested;
wherein the reference platform is connected with the platform to be tested in a spherical hinge mode through the plurality of quasi-zero stiffness supporting legs;
wherein each of the plurality of quasi-zero stiffness supporting legs comprises:
a lower end spherical hinge;
a lower end cover;
a positive stiffness unit;
a negative stiffness unit, a shaft, a lower end shell;
an upper end shell; and
an upper end spherical hinge;
wherein a spherical hinge end of the lower end spherical hinge is connected with the platform to be tested, and an other end of the lower end spherical hinge is threadedly connected with an end of the lower end cover;
wherein an other end of the lower end cover is threadedly connected with an end of the lower end shell, an other end of the lower end shell is connected with an end of the upper end shell, a spherical hinge end of the upper end spherical hinge is connected with the reference platform, and an other end of the upper end spherical hinge is threadedly connected with an other end of the upper end shell;
wherein the shaft is arranged in the lower end shell, and an end of the shaft is connected with the upper end shell; and
wherein the positive stiffness unit and the negative stiffness unit are each arranged on both the shaft and an inner wall of the lower end shell.