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| 1 | The Chinese Hα Solar Explorer(CHASE) mission: An overview显示文摘The Chinese Hα Solar Explorer(CHASE), dubbed “Xihe”—Goddess of the Sun, was launched on October 14, 2021 as the first solar space mission of China National Space Administration(CNSA). The CHASE mission is designed to test a newly developed satellite platform and to acquire the spectroscopic observations in the Hα waveband. The Hα Imaging Spectrograph(HIS)is the scientific payload of the CHASE satellite. It consists of two observational modes: raster scanning mode and continuum imaging mode. The raster scanning mode obtains full-Sun or region-of-interest spectral images from 6559.7 to 6565.9 ? and from 6567.8 to 6570.6 ? with 0.024 ? pixel spectral resolution and 1 min temporal resolution. The continuum imaging mode obtains photospheric images in continuum around 6689 ? with the full width at half maximum of 13.4 ?. The CHASE mission will advance our understanding of the dynamics of solar activity in the photosphere and chromosphere. In this paper, we present an overview of the CHASE mission including the scientific objectives, HIS instrument overview, data calibration flow, and first results of on-orbit observations. | Chuan Li Cheng Fang Zhen Li MingDe Ding PengFei Chen Ye Qiu Wei You Yuan Yuan MinJie An HongJiang Tao XianSheng Li Zhe Chen Qiang Liu Gui Mei Liang Yang Wei Zhang WeiQiang Cheng JianXin Chen ChangYa Chen Qiang Gu QingLong Huang MingXing Liu ChengShan Han HongWei Xin ChangZheng Chen YiWei Ni WenBo Wang ShiHao Rao HaiTang Li Xi Lu Wei Wang Jun Lin YiXian Jiang LingJie Meng Jian Zhao | 2022 | Science China(Physics,Mechanics & Astronomy)2022，65，8： | 7 |
| 2 | On the technologies of Hα imaging spectrograph for the CHASE mission显示文摘The Hα imaging spectrograph(HIS) is the scientific payload of the first solar space mission, the Chinese Hα solar explorer(CHASE), supported by the China National Space Administration(CNSA). The CHASE/HIS achieves, for the first time in space, Hα spectroscopic observations with high spectral and temporal resolutions. Separate channels for the raster scanning mode(RSM) and continuum imaging mode(CIM) are integrated into one, and a highly integrated design is achieved through multiple folding of the optical path and ultra-light miniaturized components. The design of HIS implements a number of key technologies such as high-precision scanning of the optical field of view(FOV), high-precision integrated manufacturing inspection, a large-tolerance pre-filter window, and full-link solar radiation calibration. The HIS instrument has a pixel spectral resolution of 0.024 ? and can complete a full-Sun scanning within 46 s. | Qiang Liu Hongjiang Tao Changzheng Chen Chengshan Han Zhe Chen Gui Mei Liang Yang Qinglong Hu Hongwei Xin Xiansheng Li Hongyu Guan Donglin Xue Mingchao Zhu Changhong Hu Qinghua Ha Yukun He Cheng Fang Chuan Li Zhen Li | 2022 | Science China(Physics,Mechanics & Astronomy)2022，65，8： | 2 |
| 3 | New stability criteria for linear systems with interval time-varying delay显示文摘 | JIANG Xiefu HAN Qinglong | 2008 | Automatiea2008，44，10： | 1 |
| 4 | A Novel Networked Predictive Control Method for Systems with Random Communication Constraints显示文摘This paper presents a novel observer-based predictive control method for networked systems where random network-induced delays,packet disorders and packet dropouts in both feedback and forward channels are considered.The proposed method has three significant features:i)A concept of destination-based lumped(DBL)delay is introduced to represent the combined effects of random communication constraints in each channel;ii)in view of different natures of the random DBL delays in the feedback and forward channels,different compensation schemes are designed;and iii)it is actual control inputs rather than predicted ones that are employed to generate future control signals based on the latest system state estimate available in the controller.For the resulting closed-loop system,a necessary and sufficient stability condition is derived,which is less conservative and also independent of random communication constraints in both channels.Simulation results are provided to demonstrate the effectiveness of the proposed method. | PANG Zhonghua BAI Chuandong LIU Guoping HAN Qinglong ZHANG Xianming | 2021 | Journal of Systems Science & Complexity2021，34，4： | 1 |
| 5 | Network-based robust H∞ control of systems with uncertainty显示文摘 | Yue dong Han Qinglong James L | 2005 | Automatica2005，41，6： | 1 |
| 6 | Robust H Model Reference Tracking Control for Networked Control Systems withCommunication Constraints 显示文摘 | Wang Yulong Han Qinglong | 2009 | International Journal of Control Automation and Systems2009，7，6： | 1 |
| 7 | Robust H∞ filtering for a class of uncertain linear systems with time-varying delay显示文摘 | ZHANG XIANMING HAN QINGLONG | 2008 | Automatica2008，44，： | 1 |
| 8 | A new H∞ stabilization criterion for networked control sys- tems 显示文摘 | JIANG Xiefu HAN Qinglong LIU Shirong | 2008 | IEEE Transactions on Automatic Control2008，53，4： | 1 |
| 9 | Modelling and Observer- based H Controller Design for Networked Control Systems显示文摘 | Wang Yulong Han Qinglong | 2014 | IET Control Theory & Applications2014，8，15： | 1 |
| 10 | Robust stability for a class of linear systems with time-varying delay and nonlinear perturbations显示文摘 | HAN Qinglong | 2004 | Comput Mathematics Appl2004，47，8： | 1 |
| 11 | Absolute stability of time-delay systems with sector-bounded nonlinearity显示文摘 | HAN Qinglong | 2005 | Automatica2005，41，12： | 1 |
| 12 | State feedback con- troller design of networked control systems显示文摘 | Yue Dong Han Qinglong Peng Chen | 2004 | IEEE Trans-actions on Circuits and Systems II:Express Briefs2004，51，11： | 1 |
| 13 | Network-based robust H control of systems with uncertainty 显示文摘 | Yue Dong Han QingLong James Lam | 2005 | Automatica2005，41，： | 1 |
| 14 | Networked based robust control of systems withuncert-ain显示文摘 | Dong Yue QingLong Han James Lain | 2005 | Automatica2005，41，： | 1 |
| 15 | Statefeedbackcontrollerdesignofnetworkedcontrolsystems显示文摘 | YueDong Han QingLong Chen Peng | 2004 | IEEETransactionson CircuitsandSystems2004，51，11： | 1 |
| 16 | Stability criteria for a class of linear neutral systems with time-varying discrete and distributed delays显示文摘 | HAN Qinglong | 2003 | IMA Journal of Mathematical Control and Information2003，20，4： | 1 |
| 17 | Robust Stability of Uncertain Delay-differential Systems of Neutral Type显示文摘 | Han Qinglong | 2002 | Automatica2002，38，3： | 1 |
| 18 | Network-based robust H∞ control of systems with uncertainty显示文摘 | Yue Dong Han Qinglong Lam J | 2005 | Automatica2005，41，6： | 1 |
| 19 | State feedback controller design of networked control systems显示文摘 | Yue Dong Han Qinglong Peng Chen | 2004 | IEEE Transactions on Circuits and Systems II:Express Briefs2004，51，11： | 1 |
| 20 | A descriptor system approach to robust stability of uncertain neutral systems with discrete and distributed delays显示文摘 | HAN Qinglong | 2004 | Automatica2004，40，10： | 1 |
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