The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2026
Filed:
Apr. 17, 2023
Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, CN;
Yu Cao, Shaanxi, CN;
Haitao Wang, Shaanxi, CN;
Xin Li, Shaanxi, CN;
Junfeng Han, Shaanxi, CN;
Shan Guo, Shaanxi, CN;
Meilin Xie, Shaanxi, CN;
Fan Wang, Shaanxi, CN;
Lei Wang, Shaanxi, CN;
Abstract
A dual-position loop control method and system of a turntable are based on a harmonic speed reduction mechanism. The system and the method use feedbacks from two positions with the help of a first position sensor mounted on a shaft of a motor and a second position sensor mounted on an output end of a harmonic speed reducer respectively. The response is fast at the position of the shaft of the motor, and the second position sensor at the output end of the harmonic speed reducer can directly measure the position of a harmonic output end. Therefore, the influence of nonlinearity factors on the control system is reduced.