Drop tower tests of Taiji-1 inertial sensor substitute

Abstract Taiji-1, which is the first technical verification satellite of China’s Space Gravitational Wave Detection Program, was successfully launched on August 31, 2019. The mission aimed to investigate the key technologies used in space gravitational wave detection. The inertial sensor, which was...

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Autores principales:	Jian Min, Zuo-Lei Wang, Yun-Peng Li, Wen-Ze Tao, Cun-Hui Li, Jun-Gang Lei, Dong-Xue Xi, Da Fan, Jun-Biao Wang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Biotechnology TP248.13-248.65 Physiology QP1-981
Acceso en línea:	https://doaj.org/article/287a7d84030241ea8e239e2274dfa84d
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spelling	oai:doaj.org-article:287a7d84030241ea8e239e2274dfa84d2021-12-02T15:39:42ZDrop tower tests of Taiji-1 inertial sensor substitute10.1038/s41526-021-00154-82373-8065https://doaj.org/article/287a7d84030241ea8e239e2274dfa84d2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41526-021-00154-8https://doaj.org/toc/2373-8065Abstract Taiji-1, which is the first technical verification satellite of China’s Space Gravitational Wave Detection Program, was successfully launched on August 31, 2019. The mission aimed to investigate the key technologies used in space gravitational wave detection. The inertial sensor, which was one of the main payloads, measured the residual acceleration of the satellite, and verified the drag-free control technology. Its performance was crucial to the success of the Taiji-1 mission. To ensure its performance in orbit, the inertial sensor was fully evaluated prior to launch. Owing to the gravitational acceleration on the ground, it is impossible to verify all the properties of the inertial sensor in a routine laboratory. A feasible method to conduct such tests is to use a drop tower. To guarantee the safety of the inertial sensor, a substitute was used with similar structure and circuit design. A total of 20 falls in three groups were completed, a set of research methods was established, and the importance of conducting simulations before the drop tests was verified. For the first time, the switch of different circuit gains in a drop tower test has been achieved and the National Microgravity Laboratory of China (NMLC) drop tower’s residual accelerations in three dimensions were measured. The results demonstrated that the microgravity level of the drop tower can reach about 58 μg0 in the fall direction and 13 μg0 along the horizontal axes.Jian MinZuo-Lei WangYun-Peng LiWen-Ze TaoCun-Hui LiJun-Gang LeiDong-Xue XiDa FanJun-Biao WangNature PortfolioarticleBiotechnologyTP248.13-248.65PhysiologyQP1-981ENnpj Microgravity, Vol 7, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biotechnology TP248.13-248.65 Physiology QP1-981
spellingShingle	Biotechnology TP248.13-248.65 Physiology QP1-981 Jian Min Zuo-Lei Wang Yun-Peng Li Wen-Ze Tao Cun-Hui Li Jun-Gang Lei Dong-Xue Xi Da Fan Jun-Biao Wang Drop tower tests of Taiji-1 inertial sensor substitute
description	Abstract Taiji-1, which is the first technical verification satellite of China’s Space Gravitational Wave Detection Program, was successfully launched on August 31, 2019. The mission aimed to investigate the key technologies used in space gravitational wave detection. The inertial sensor, which was one of the main payloads, measured the residual acceleration of the satellite, and verified the drag-free control technology. Its performance was crucial to the success of the Taiji-1 mission. To ensure its performance in orbit, the inertial sensor was fully evaluated prior to launch. Owing to the gravitational acceleration on the ground, it is impossible to verify all the properties of the inertial sensor in a routine laboratory. A feasible method to conduct such tests is to use a drop tower. To guarantee the safety of the inertial sensor, a substitute was used with similar structure and circuit design. A total of 20 falls in three groups were completed, a set of research methods was established, and the importance of conducting simulations before the drop tests was verified. For the first time, the switch of different circuit gains in a drop tower test has been achieved and the National Microgravity Laboratory of China (NMLC) drop tower’s residual accelerations in three dimensions were measured. The results demonstrated that the microgravity level of the drop tower can reach about 58 μg0 in the fall direction and 13 μg0 along the horizontal axes.
format	article
author	Jian Min Zuo-Lei Wang Yun-Peng Li Wen-Ze Tao Cun-Hui Li Jun-Gang Lei Dong-Xue Xi Da Fan Jun-Biao Wang
author_facet	Jian Min Zuo-Lei Wang Yun-Peng Li Wen-Ze Tao Cun-Hui Li Jun-Gang Lei Dong-Xue Xi Da Fan Jun-Biao Wang
author_sort	Jian Min
title	Drop tower tests of Taiji-1 inertial sensor substitute
title_short	Drop tower tests of Taiji-1 inertial sensor substitute
title_full	Drop tower tests of Taiji-1 inertial sensor substitute
title_fullStr	Drop tower tests of Taiji-1 inertial sensor substitute
title_full_unstemmed	Drop tower tests of Taiji-1 inertial sensor substitute
title_sort	drop tower tests of taiji-1 inertial sensor substitute
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/287a7d84030241ea8e239e2274dfa84d
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Drop tower tests of Taiji-1 inertial sensor substitute

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