碩士 / 國立中央大學 / 光機電工程研究所 / 101 / A two meter diameter magnetometer calibration Helmholtz chamber is developed. Dynamic magnetic field scenarios as well as static test field can be programmably generated through a human-machine interfaces (HMI). The magnetic field is controlled to follow the setup scenario by both feed forward and feedback schemes. The electric currents in the coils and the resultant magnetic field are monitored and logged through the programming interface. With this chamber, a magnetometer can be calibrated, the inherent magnetic field bias in a payload structure can be measured and calibrated out, and an actual in-flight magnetic field scenario can also be emulated for a hardware-in-the-loop (HIL) test. The system, mechanical design, circuits, control software, and the HMI are tested and its applications are proven practical and convenient. The measurement specifications achieved are a standard deviation of 2nT with the resolution of 0.19nT in the dynamic range of ±100000nT. The magnetic field setting can be updated at the maximum rate of 270Hz while the settling time is 1.3m sec after each magnetic field set point change
| Identifer | oai:union.ndltd.org:TW/101NCU05651115 |
| Date | January 2013 |
| Creators | WU, PO-TA, 吳柏達 |
| Contributors | 江士標 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 88 |
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