Details

Autor(en) / Beteiligte

• Liu, T Y
• Wu, Q P
• Sun, B Q
• Han, F T

Titel

Microgravity Level Measurement of the Beijing Drop Tower Using a Sensitive Accelerometer

Ist Teil von

• Scientific reports, 2016-08, Vol.6 (1), p.31632-31632, Article 31632

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2016

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Drop tower is the most common ground-based facility to provide microgravity environment and widely used in many science experiments. A differential space accelerometer has been proposed to test the spin-gravity interaction between rotating extended bodies onboard a drag-free satellite. In order to assist design and test of this inertial sensor in a series of ground- based pre-flight experiments, it is very important to know accurately the residual acceleration of drop towers. In this report, a sensitive instrument for this purpose was built with a high-performance servo quartz accelerometer, and the dedicated interface electronics design providing small full-scale range and high sensitivity, up to 136.8 V/g0. The residual acceleration at the Beijing drop tower was measured using two different drop capsules. The experimental result shows that the microgravity level of the free-falling double capsule is better than 2 × 10(-4)g0 (Earth's gravity). The measured data in this report provides critical microgravity information for design of the following ground experiments.