Subjects: Geosciences >> Space Physics submitted time 2017-03-10
Abstract：基于多项式校正方法，建立了针对图像坐标的公式模型，利用MATLAB中的曲面拟合工具（Surface Fitting Tool）得到了多项式参数，实现了对紫外探测器成像畸变的校正。本文介绍了楔条形阳极紫外探测器的畸变产生原因以及多项式校正的原理，设计了一个应用于LabVIEW的dll模块，通过小孔掩模板实验求得多项式并应用于分辨率板的成像，实现了对分辨率板成像的畸变校正。
Peer Review Status:
Awaiting Review
Subjects: Geosciences >> Space Physics submitted time 2016-04-22
Abstract： The capability of the modern payloads on satellite is getting stronger and stronger， and the motor has been used widely. The life and reliability of the motor equipped on satellite would be the main characters that restrict long-time work of the satellites. So the design of motor system on satellites should be not only satisfied with the application requirements， but also the requirements of life and reliability should be fully taken into account simultaneously. In this paper， a two-phase hybrid stepper motor control system based on FPGA is introduced. In order to improve control accuracy and suppress low-frequency vibration， the system was designed based on subdivision control method and an acceleration process was designed to ensure that motor started properly. Large current was used to stop the motor quickly and small current was used to keep the motor motionless. The test results showed that this system has the advantages of low-power consumption， starting and stopping steadily.
Peer Review Status:Awaiting Review
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