Switching Method for Long-Term Inertial Navigation System Based on Switched Control

Deng, Zhihong; Lei, Shi; Liu, Tong; Wang, Bo

doi:10.1017/s0373463319000122

Cited by 2 publications

(1 citation statement)

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“…The system uses a camera to determine the miss distance for coarse tracking, and fine tracking uses gyroinformation and coarse-tracking residual information for further suppression, thereby achieving high-precision and stable tracking in the case of target source and load disturbances 24 – 26 Finally, an experimental system was built for verification. The carrier was placed on a six-degree-of-freedom (DOF) rocking platform.…”

Section: Introductionmentioning

confidence: 99%

Coarse and fine combination technology based on gyrostability and missing target tracking

Liu

Song

et al. 2022

Opt. Eng.

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High-precision, stable tracking technology on a mobile platform is a key technology for realizing the integration of airborne search and tracking. In this study, coarse-fine compound technology based on gyrostabilization and miss tracking is applied. First, the working principle of the coarse and fine composite system is analyzed, and then the coarse and fine composite algorithm is modeled. Thereafter, the error of the coarse and fine composite axis is analyzed, and the precision tracking servo control algorithm is designed. Finally, using the model and algorithm designed to control the single reflector and galvanometer, the coarse tracking of the space target and the fine tracking of the source are completed under the condition that the equivalent sine amplitude is 5 deg and the frequency is 0.2 Hz. At the same time, a test system was built for performance verification. The algorithm achieved a coarse-tracking azimuth-axis tracking accuracy [root mean square (RMS)] of 26.3 μrad and a pitch-axis tracking accuracy (RMS) of 28.9 μrad. After composite tracking was switched on, precision tracking azimuth-axis tracking accuracy (RMS) improved to 7.9 μrad and pitch-axis tracking accuracy (RMS) improved to 6.3 μrad, both better than 10 μrad. This study provides new insights into the stability and precision tracking of single cameras on airborne platforms. At the end of this work, the outdoor experiment to verify the influence of random interference on the system performance under given conditions and the subsequent optimization direction of the system are given.

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Section: Introductionmentioning

confidence: 99%