Correction of angle measuring errors for large telescopes

Xian-jun, 王显军 Wang

doi:10.3788/ope.20152309.2446

Cited by 2 publications

(1 citation statement)

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“…They also proposed an algorithm compensation method based on the established models to improve the tracking precision of a telescope control system. Xianjun Wang [17] analyzed the cause of angle measuring error of grating for large telescopes and compensated the angle measuring error by resonant equation. Liandong Yu [18] proposed the harmonic method to compensate for the circular grating angle measurement error of the portable articulated coordinate measurement instrument machines caused by ambient temperature change.…”

Section: Introductionmentioning

confidence: 99%

Calibration, Compensation and Accuracy Analysis of Circular Grating Used in Single Gimbal Control Moment Gyroscope

Dai

Chen

et al. 2020

Sensors

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The accuracy of the circular grating is the key point for control precision of the single gimbal control moment gyroscope servo system used in civilian micro-agile satellites. Instead of using the multi reading heads to eliminate eccentricity errors, an algorithm compensation method based on a calibration experiment using a single reading head was proposed to realize a low-cost and high accuracy angular position measurement. Moreover, the traditional hardware compensation method using double reading heads was also developed for comparison. Firstly, the single gimbal control moment gyroscope system of satellites was introduced. Then, the errors caused by the installation of the reading head were studied and the mathematic models of these errors were developed. In order to construct the compensation function, a calibration experiment using the autocollimator and 24-sided prism was performed. Comparison of angle error compensation using the algorithm and hardware method was presented, and results showed that the algorithm compensation method proposed by this paper achieved the same accuracy level as the hardware method. Finally, the proposed method was further verified through a control system simulation.

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Section: Introductionmentioning

confidence: 99%