Open AccessRapid detection of index for encoder in rotary inertial navigation system
Author(s) -
Lei Wang,
Kui Li,
Zengjun Liu,
Yiming Zhang,
Jiajing Niu
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.005591
Subject(s) - azimuth , inertial navigation system , encoder , computer science , optics , index (typography) , inertial frame of reference , inertial measurement unit , rotation (mathematics) , rotary encoder , computer vision , physics , quantum mechanics , world wide web , operating system
This paper presents an approach to detect the index of incremental photoelectric encoder with shorter time for rotary inertial navigation system. The order of index detection and coarse alignment is exchanged in this approach and information from coarse alignment is used to calculate the direction of index. Then two cases of azimuth axis and four cases of horizontal axes are analyzed and corresponding solutions are designed. The paper examines the solutions through two experiments in a tri-axis rotary inertial navigation system, and the results demonstrate that the system can capture index pulse in the application of the presupposes schemes with shorter time.