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Solar adaptive optics systems for the New Vacuum Solar Telescope at the Fuxian Lake Solar Observatory
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作者 Lanqiang Zhang Xuejun Rao +8 位作者 Hua Bao Youming Guo Jinsheng Yang Nanfei Yan Xian Ran Dingkang Tong Xinlong Fan Zhongyi Feng Changhui Rao 《Astronomical Techniques and Instruments》 CSCD 2024年第2期95-104,共10页
Adaptive optics(AO)is essential for high-quality ground-based observations with large telescopes because it counters the impact of wavefront aberrations caused by atmospheric turbulence.The new vacuum solar telescope(... Adaptive optics(AO)is essential for high-quality ground-based observations with large telescopes because it counters the impact of wavefront aberrations caused by atmospheric turbulence.The new vacuum solar telescope(NVST)is one of the most important high-resolution solar observation instruments in the world.Three sets of solar adaptive optics systems have been developed and installed on this telescope:conventional adaptive optics,ground layer adaptive optics,and multi-conjugate adaptive optics.These have been in operation from 2018 to 2023.This paper details the development and application of solar adaptive optics on the NVST and discusses the newest instrumentation. 展开更多
关键词 Solar observation Adaptive optics Multi-conjugate adaptive optics
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The Educational Adaptive-optics Solar Telescope at the Shanghai Astronomy Museum
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作者 Zhimao Du Qing Lin +6 位作者 Xuejun Rao Yue Zhong Jiawen Yao Hua Bao Libo Zhong Yu Liang Hui Zhang 《Astronomical Techniques and Instruments》 CSCD 2024年第3期171-178,共8页
The Educational Adaptive-optics Solar Telescope(EAST)at the Shanghai Astronomy Museum has been running routine astronomical observations since 2021.It is a 65-cm-aperture Gregorian solar telescope for scientific educa... The Educational Adaptive-optics Solar Telescope(EAST)at the Shanghai Astronomy Museum has been running routine astronomical observations since 2021.It is a 65-cm-aperture Gregorian solar telescope for scientific education,outreach,and research.The telescope system is designed in an“open”format so that the solar tower architecture can be integrated with it,and visitors can watch the observations live from inside the tower.Equipped with adaptive optics,a high-resolution imaging system,and an integral field unit spectro-imaging system,this telescope can obtain high-resolution solar images in the TiO and Hαbands,and perform spectral image reconstruction using 400 optical fibers at selected wavelengths.It can be used not only in public education and scientific outreach but also in solar physics research. 展开更多
关键词 Astronomy museum Sun observation Adaptive optics Integral field unit
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Comparison of Precipitation Observations from a Prototype Space-based Cloud Radar and Ground-based Radars 被引量:6
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作者 刘黎平 张志强 +3 位作者 于丹茹 杨虎 赵崇辉 仲凌志 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2012年第6期1318-1329,共12页
A prototype space-based cloud radar has been a precipitation system over Tianjin, China in July developed and was installed on an airplane to observe 2010. Ground-based S-band and Ka-band radars were used to examine t... A prototype space-based cloud radar has been a precipitation system over Tianjin, China in July developed and was installed on an airplane to observe 2010. Ground-based S-band and Ka-band radars were used to examine the observational capability of the prototype. A cross-comparison algorithm between different wavelengths, spatial resolutions and platform radars is presented. The reflectivity biases, correlation coefficients and standard deviations between the radars are analyzed. The equivalent reflectivity bias between the S- and Ka-band radars were simulated with a given raindrop size distribution. The results indicated that reflectivity bias between the S- and Ka-band radars due to scattering properties was less than 5 dB, and for weak precipitation the bias was negligible. The prototype space-based cloud radar was able to measure a reasonable vertical profile of reflectivity, but the reflectivity below an altitude of 1.5 km above ground level was obscured by ground clutter. The measured refiectivity by the prototype space-based cloud radar was approximately 10.9 dB stronger than that by the S-band Doppler radar (SA radar), and 13.7 dB stronger than that by the ground-based cloud radar. The reflectivity measured by the SA radar was 0.4 dB stronger than that by the ground-based cloud radar. This study could provide a method for the quantitative examination of the observation ability for space-based radars. 展开更多
关键词 space-based cloud radar observational capability field experiment cloud observation
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An impact assessment of sea ice on ocean optics observations in the marginal ice zone of the Arctic 被引量:1
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作者 LI Tao ZHAO Jinping 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2014年第12期24-31,共8页
Diffuse attenuation coefficient (DAC) of sea water is an important parameter in ocean thermodynamics and biology, reflecting the absorption capability of sea water in different layers. In the Arctic Ocean, however, ... Diffuse attenuation coefficient (DAC) of sea water is an important parameter in ocean thermodynamics and biology, reflecting the absorption capability of sea water in different layers. In the Arctic Ocean, however, sea ice affects the radiance/irradiance measurements of upper ocean, which results in obvious errors in the DAC calculation. To better understand the impacts of sea ice on the ocean optics observations, a series ofin situ experiments were carried out in the summer of 2009 in the southern Beaufort Sea. Observational results show that the profiles of spectral diffuse attenuation coefficients of seawater near ice cover within upper surface of 50 m were not contaminated by the sea ice with a solar zenith angle of 55&#176;, relative azimuth angle of 110&#176;≤φ≤115&#176; and horizontal distance between the sensors and ice edge of greater than 25 m. Based on geometric optics theory, the impact of ice cover could be avoided by adjusting the relative solar azimuth angle in a particular distance between the instrument and ice. Under an overcast sky, ice cover being 25 m away from sensors did not affect the profiles of spectral DACs within the upper 50 m either. Moreover, reli-able spectral DACs of seawater could be obtained with sensors completely covered by sea ice. 展开更多
关键词 impact assessment optical observation ice edge Arctic Ocean
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Review on strategies of space-based optical space situational awareness 被引量:8
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作者 HU Yunpeng LI Kebo +1 位作者 LIANG Yan’gang CHEN Lei 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2021年第5期1152-1166,共15页
Space-based optical(SBO)space surveillance has attracted widespread interest in the last two decades due to its considerable value in space situation awareness(SSA).SBO observation strategy,which is related to the per... Space-based optical(SBO)space surveillance has attracted widespread interest in the last two decades due to its considerable value in space situation awareness(SSA).SBO observation strategy,which is related to the performance of space surveillance,is the top-level design in SSA missions reviewed.The recognized real programs about SBO SAA proposed by the institutions in the U.S.,Canada,Europe,etc.,are summarized firstly,from which an insight of the development trend of SBO SAA can be obtained.According to the aim of the SBO SSA,the missions can be divided into general surveillance and space object tracking.Thus,there are two major categories for SBO SSA strategies.Existing general surveillance strategies for observing low earth orbit(LEO)objects and beyond-LEO objects are summarized and compared in terms of coverage rate,revisit time,visibility period,and image processing.Then,the SBO space object tracking strategies,which has experienced from tracking an object with a single satellite to tracking an object with multiple satellites cooperatively,are also summarized.Finally,this paper looks into the development trend in the future and points out several problems that challenges the SBO SSA. 展开更多
关键词 space situation awareness(SSA) space-based space surveillance space-based optical(SBO)observation strategy general surveillance space object tracking
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Thickness evolution of graphite-based cathodes in the dual ion batteries via in operando optical observation 被引量:1
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作者 Na Li Yaoda Xin +4 位作者 Haosen Chen Shuqiang Jiao Hanqing Jiang Wei-Li Song Daining Fang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第2期122-128,共7页
Graphite has been currently considered as a promising cathode material in dual ion batteries(DIBs)due to its unique features of sp2 hybridized carbon and stacked two-dimensional layered structures.However,unexpected v... Graphite has been currently considered as a promising cathode material in dual ion batteries(DIBs)due to its unique features of sp2 hybridized carbon and stacked two-dimensional layered structures.However,unexpected volume/thickness changes in the graphite cathodes,induced by the intercalation/deintercalation of anions with large molecular size have been known to be a critical problem in designing DIB cells.To understand the volume/thickness changes in the DIB electrodes,in operando optical observing apparatus has been employed to observe the cross-section view of a graphite-based cathode upon cycles in the present work.The observation suggests that the cathode initially presented a huge irreversible thickness change(60%),and such thickness variation was prone to reduce and remain <20% in the following cycles.The results from both in operando observation and electrochemical characterizations collectively indicate that the greater thickness variation at initial cycle should be attributed to both anion intercalation into graphite-based cathodes and irreversible decomposition of chemical components in the DIB system.The method here highlights a universal route for fundamentally understanding the electrodes of huge volume variation. 展开更多
关键词 DUAL ion BATTERIES In OPERANDO optical observation GRAPHITE CATHODE Thickness EVOLUTION
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Observing single cells in whole organs with optical imaging
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作者 Xiaoquan Yang Tao Jiang +5 位作者 Lirui Liu Xiaojun Zhao Ximiao Yu Minjun Yang Guangcai Liu Qingming Luo 《Journal of Innovative Optical Health Sciences》 SCIE EI CAS CSCD 2023年第1期115-140,共26页
Cells are the basic unit of human organs that are not fully understood.The revolutionary advancements of optical imaging alowed us to observe single cells in whole organs,revealing the complicated composition of cells... Cells are the basic unit of human organs that are not fully understood.The revolutionary advancements of optical imaging alowed us to observe single cells in whole organs,revealing the complicated composition of cells with spatial information.Therefore,in this review,we revisit the principles of optical contrast related to those biomolecules and the optical techniques that transform optical contrast into detectable optical signals.Then,we describe optical imaging to achieve threedimensional spatial discrimination for biological tisutes.Due to the milky appearance of tissues,the spatial information burred deep in the whole organ.Fortunately,strategies developed in the last decade could circumvent this issue and lead us into a new era of investigation of the cells with their original spatial information. 展开更多
关键词 Single cell observation whole organ optical imaging
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Solar Multi-Spectral Radiometric Observations of Atmospheric Optical Thickness over Passarlapudi Gas Well Blow-Out Site in India
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《Advances in Atmospheric Sciences》 SCIE CAS CSCD 1997年第3期130-137,共8页
SolarMulti-SpectralRadiometricObservationsofAtmosphericOpticalThicknesoverPasarlapudiGasWelBlow-OutSiteinInd... SolarMulti-SpectralRadiometricObservationsofAtmosphericOpticalThicknesoverPasarlapudiGasWelBlow-OutSiteinIndiaG.Pandithuraian... 展开更多
关键词 BLOW OVER SITE Solar Multi-Spectral Radiometric observations of Atmospheric optical Thickness over Passarlapudi Gas Well Blow-Out Site in India
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Portable adaptive optics for exoplanet imaging 被引量:6
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作者 Yong-Tian Zhu Jiang-Pei Dou +3 位作者 Xi Zhang Gang Zhao Jing Guo Leopoldo Infante 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2021年第4期110-118,共9页
The portable adaptive optics(PAO)device is a low-cost and compact system,designed for 4-meter class telescopes that have no adaptive optics(AO)system,because of the physical space limitation at the Nasmyth or Cassegra... The portable adaptive optics(PAO)device is a low-cost and compact system,designed for 4-meter class telescopes that have no adaptive optics(AO)system,because of the physical space limitation at the Nasmyth or Cassegrain focus and the historically high cost of conventional AO.The initial scientific observations of the PAO are focused on the direct imaging of exoplanets and sub-stellar companions.This paper discusses the concept of PAO and the associated high-contrast imaging performance in our recent observational runs.PAO deliver a Strehl ratio better than 60%in H band under median seeing conditions of 1".Combined with our dedicated image rotation and subtraction(IRS)technique and the optimized IRS(O-IRS)algorithm,the averaged contrast ratio for a 5≤V_(mag)≤9 primary star is 1.3×10^(-5)and3.3×10^(-6)at angular distance of 0.36"with exposure time of 7 minutes and 2 hours,respectively.PAO has successfully revealed the known exoplanet ofκAnd b in our recent observation with the 3.5-meter ARC telescope at Apache Point Observatory.We have performed the associated astrometry and photometry analysis of the recoveredκAnd b planet,which gives a projected separation of 0.98"±0.05",a position angle of 51.1°±0.5°and a mass of 10.15_(-1.255)^(+2.19) MJup.These results demonstrate that PAO can be used for direct imaging of exoplanets with medium-sized telescopes. 展开更多
关键词 stars:imaging instrumentation:adaptive optics instrumentation:high angular resolution methods:observational techniques:image processing
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Comments on "Direct Radiative Forcing of Anthropogenic Aerosols over Oceans from Satellite Observation" 被引量:1
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作者 Hye-Ryun OH Chang-Hoi HO Yong-Sang CHOI 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2013年第1期10-14,共5页
Previous observational studies have estimated anthropogenic aerosol direct radiative forcing over oceans without due consideration of cloudy-sky aerosols. However, when interaction between clouds and aerosols located ... Previous observational studies have estimated anthropogenic aerosol direct radiative forcing over oceans without due consideration of cloudy-sky aerosols. However, when interaction between clouds and aerosols located below or above the cloud level is taken into account, the aerosol direct radiative forcing is larger by as much as 5 W m-2 in most mid-latitude regions in the Northern Hemisphere. 展开更多
关键词 cloudy-sky aerosol forcing anthropogenic aerosol aerosol optical depth satellite observations
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Magnetic Field Strengths and Structures from Radio Observations of Solar Active Regions 被引量:1
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作者 Chang-XiZhang G.B.Gelfreikh 《Chinese Journal of Astronomy and Astrophysics》 CSCD 北大核心 2002年第3期266-276,共11页
Radio observations of some active regions (ARs) obtained with the Nobeyama radioheliograph at λ=1.76 cm are used for estimating the magnetic field strength in the upper chromosphere, based on thermal bremsstrahlung. ... Radio observations of some active regions (ARs) obtained with the Nobeyama radioheliograph at λ=1.76 cm are used for estimating the magnetic field strength in the upper chromosphere, based on thermal bremsstrahlung. The results are compared with the magnetic field strength in the photosphere from observations with the Solar Magnetic Field Telescope (SMFT) at Huairou Solar Observing Station of Beijing Astronomical Observatory. The difference in the magnetic field strength between the two layers seems reasonable. The solar radio maps of active regions obtained with the Nobeyama radioheliograph, both in total intensity (I-map) and in circular polarizations (V-map), are compared with the optical magnetograms obtained with the SMFT. The comparison between the radio map in circular polarization and the longitudinal photospheric magnetogram of a plage region suggests that the radio map in circular polarization is a kind of magnetogram of the upper chromosphere. The comparison of the radio map in total intensity with the photo-spheric vector magnetogram of an AR shows that the radio map in total intensity gives indications of magnetic loops in the corona, thus we have a method of defining the coronal magnetic structure from the radio I-maps at λ=1.76 cm. Analysing the I-maps, we identified three components: (a) a compact bright source; (b) a narrow elongated structure connecting two main magnetic islands of opposite polarities (observed in both the optical and radio magnetograms); (c) a wide, diffuse, weak component that corresponds to a wide structure in the solar active region which shows in most cases an S or a reversed S contour, which is probably due to the differential rotation of the Sun. The last two components suggest coronal loops on different spatial scales above the neutral line of the longitudinal photospheric magnetic field. 展开更多
关键词 Sun: active regions - Sun: magnetic fields - Sun: optical observation - Sun: radio observation
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High power optics and its new manifestations
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作者 Victor V. Apollonov 《Natural Science》 2013年第5期653-671,共19页
The advent of the laser has placed stringent requirements on the fabrication, performance and quality of optical elements employed within systems for most practical applications. Their high power performance is genera... The advent of the laser has placed stringent requirements on the fabrication, performance and quality of optical elements employed within systems for most practical applications. Their high power performance is generally governed by three distinct steps, firstly the absorption of incident optical radiation (governed primarily by various absorption mechanisms);secondly, followed by a temperature increase and response governed primarily by thermal properties and finally the elements thermo-optical and thermomechanical response, e.g., distortion, stress birefringenous fracture, etc. All of which needs to be understood in the design as efficient, compact, reliable and useful for many applications high power systems, under a variety of operating conditions, pulsed and continuous wave, rep-rated or burst mode of varying duty cycles. 展开更多
关键词 Heat Transfer Surface Deformation optical Polishing REFLECTIVITY INTERMETALLIC Coatings Porous STRUCTURES LD STRUCTURES Silicon CARBIDE space-based Telescopes
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基于有限时间观测器的光储系统母线电压互补滑模控制 被引量:1
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作者 皇金锋 杨振宇 《湖南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2024年第2期12-21,共10页
针对光储直流微网混合储能系统易受能源间歇性输入、负载随机性扰动以及功率流向切换等干扰,会造成母线电压波动、系统功率失稳等问题,提出一种基于有限时间观测器的互补滑模控制(FTESO+CSMC)策略.首先,根据混合储能元件的高低频特性,... 针对光储直流微网混合储能系统易受能源间歇性输入、负载随机性扰动以及功率流向切换等干扰,会造成母线电压波动、系统功率失稳等问题,提出一种基于有限时间观测器的互补滑模控制(FTESO+CSMC)策略.首先,根据混合储能元件的高低频特性,对系统差额功率进行电流等效分配.然后,设计有限时间扩张状态观测器,对系统受到的总扰动进行观测,并将扰动观测值作为前馈项输入互补滑模控制器中,对系统扰动进行补偿,保证系统状态在有限时间内达到收敛,提高了系统的快速性和抗扰性,并根据Lyapunov理论证明了控制系统的稳定性.最后,基于MATLAB仿真平台,对多种模拟工况进行仿真,仿真结果表明,相较于传统控制策略,本文所提控制具有更快的响应速度以及更好的抗扰性能. 展开更多
关键词 光储直流微网 混合储能 母线电压 有限时间观测器 互补滑模
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国外民用光学卫星对地遥感行业发展综述
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作者 张刘 伍斌 +1 位作者 宋莹 王嘉锐 《飞控与探测》 2024年第5期1-9,共9页
光学对地遥感是国家战略性行业。介绍了国外若干典型的由政府主导的民用光学对地遥感项目的发起背景、发展过程、发展现状及后续发展方向,还介绍了国外光学商业遥感公司建设运营的光学遥感星座的发展历程、现状和下一步发展计划,梳理了... 光学对地遥感是国家战略性行业。介绍了国外若干典型的由政府主导的民用光学对地遥感项目的发起背景、发展过程、发展现状及后续发展方向,还介绍了国外光学商业遥感公司建设运营的光学遥感星座的发展历程、现状和下一步发展计划,梳理了项目中光学遥感仪器的主要参数,简述了若干正在建设的商业光学遥感星座项目。汇总了外国空间卫星遥感相关的政策法规,总结归纳了美国商业遥感发展的4个阶段。最后展望了民用光学对地遥感行业的发展趋势。 展开更多
关键词 光学对地遥感 民用光学遥感项目 商业遥感 行业监管 发展趋势
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自由运动秀丽隐杆线虫双光路观测系统
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作者 于涛源 徐熙平 +3 位作者 张少军 张宁 李宏源 王晓辉 《光学精密工程》 EI CAS CSCD 北大核心 2024年第11期1676-1685,共10页
为了解决自由运动秀丽隐杆线虫观测系统存在的视场单一、运动数据受环境影响等问题,设计了自由运动线虫双光路观测系统。该系统融合了显微成像模块和大视场成像模块,能够同时获取线虫的显微图像和培养皿图像,并通过切换荧光模块满足线... 为了解决自由运动秀丽隐杆线虫观测系统存在的视场单一、运动数据受环境影响等问题,设计了自由运动线虫双光路观测系统。该系统融合了显微成像模块和大视场成像模块,能够同时获取线虫的显微图像和培养皿图像,并通过切换荧光模块满足线虫荧光图像的获取需求。系统将显微成像模块直接装载在XYZ三轴位移平台上,可以有效避免线虫受震动影响引发的逃逸反应。最后,使用系统对USAF1951分辨率板和不同品系的线虫进行成像。实验结果显示,显微成像模块的分辨率小于2.19μm,实现了对线虫的细胞级成像,系统获取的明场显微图像清晰显示了线虫的器官组织分布和细胞轮廓,荧光图像能够清晰显示不同荧光蛋白的分布情况。大视场成像模块照度均匀、成像清晰,通过形态学算法处理图像可以采集线虫种群行为运动数据。综上所述,该系统满足不同线虫观测需求,具备较好的稳定性和数据准确性,显著提高了线虫实验的灵活性,并为不同尺度下线虫观测信息整合提供了基础。 展开更多
关键词 显微成像 双光路成像 秀丽隐杆线虫 线虫观测系统
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光学瞬变源后随观测系统设计与应用
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作者 张记成 王晓锋 +2 位作者 曾祥云 张天萌 莫军 《实验技术与管理》 CAS 北大核心 2024年第10期131-140,共10页
近年来,国内外陆续建设并投入运行了多台巡天光学观测设备,产生了海量观测数据,发现并证认了许多具有较高研究价值的瞬变源。因为瞬变源增多和望远镜观测资源有限,为提升清华大学-马化腾巡天望远镜后随观测响应能力,该文设计了新疆南山... 近年来,国内外陆续建设并投入运行了多台巡天光学观测设备,产生了海量观测数据,发现并证认了许多具有较高研究价值的瞬变源。因为瞬变源增多和望远镜观测资源有限,为提升清华大学-马化腾巡天望远镜后随观测响应能力,该文设计了新疆南山瞬变源后随观测系统(SNOVA)。该系统采用商业化配件,在统一的控制架构平台基础上,技术人员经系统选型与软硬件安装联调,实现了自动化观测运行。系统为瞬变源后随观测提供了高质量数据,有助于进一步了解天体目标的物理参数与演化性质,同时也为开展远程观测提供了一种有效途径。 展开更多
关键词 瞬变源 后随观测 光学望远镜观测系统 自动化 系统集成
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月基紫外-光学-红外天文观测站点选取方法研究
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作者 王汇娟 姜晓军 +9 位作者 邓元勇 邹永廖 徐琳 王磊 谢海闻 支挥 王佳琪 白先勇 田晖 蒋凝 《空间科学与试验学报》 CSCD 2024年第1期33-39,共7页
月面独特的位置和环境优势,为天文观测提供了难得的机会。目前包括中国、美国、欧洲航天局、俄罗斯、日本、印度等在内的多个国家和机构都在大力开展月球探测。对于开展多种科学研究的月球探测计划,站点的选取需综合考虑各项科学的需求... 月面独特的位置和环境优势,为天文观测提供了难得的机会。目前包括中国、美国、欧洲航天局、俄罗斯、日本、印度等在内的多个国家和机构都在大力开展月球探测。对于开展多种科学研究的月球探测计划,站点的选取需综合考虑各项科学的需求。本文主要介绍开展月基紫外-光学-红外天文观测对观测站点的需求,并针对该需求提出了评估某个候选站址是否满足天文观测需求的定量化分析方法。该方法适用于全月面范围内任意指定点的选址分析,将为规划中的国际月球科研站等月球探测计划的建设提供参考和支撑。 展开更多
关键词 月基天文观测 月基紫外-光学-红外天文观测 国际月球科研站
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光电跟踪系统非均匀受力摩擦补偿研究
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作者 吕南方 夏运霞 +4 位作者 张兵 包启亮 夏华阳 马荣崎 蒋晶 《激光技术》 CAS CSCD 北大核心 2024年第4期455-462,共8页
为了解决光电跟踪系统中摩擦扰动问题、进一步提高视轴稳定精度,采用了LuGre模型和终端滑模观测器(TSMO)融合的补偿方法(LuGre-TSMO),即在LuGre模型的基础上设计一种基于新型趋近率的终端滑模观测器,实现对系统摩擦的2次补偿。结果表明... 为了解决光电跟踪系统中摩擦扰动问题、进一步提高视轴稳定精度,采用了LuGre模型和终端滑模观测器(TSMO)融合的补偿方法(LuGre-TSMO),即在LuGre模型的基础上设计一种基于新型趋近率的终端滑模观测器,实现对系统摩擦的2次补偿。结果表明,相比于未补偿情况,LuGre-TSMO方法的速度跟踪均方根误差平均下降了65.38%,有效提高了实验平台视轴稳定精度;相比于LuGre模型方法和终端滑模观测器方法,LuGre-TSMO方法摩擦补偿效果最好。该方法在光电跟踪系统中是可行且有效的。 展开更多
关键词 激光技术 光电跟踪系统 摩擦补偿 LuGre摩擦模型 终端滑模观测器
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南极光学天文望远镜控制软件关键技术
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作者 李晓燕 李运 +3 位作者 孙天瑞 杨世海 杜福嘉 徐灵哲 《极地研究》 CAS CSCD 北大核心 2024年第1期99-111,共13页
南极天文望远镜控制软件是望远镜软件系统的重要组成部分,是控制计算机在望远镜用户层和设备层之间运行的关键技术。对于用户层,控制软件需具备全自动观测的交互接口、卫星通信条件下的远程访问和故障诊断等功能;对于设备层,控制软件不... 南极天文望远镜控制软件是望远镜软件系统的重要组成部分,是控制计算机在望远镜用户层和设备层之间运行的关键技术。对于用户层,控制软件需具备全自动观测的交互接口、卫星通信条件下的远程访问和故障诊断等功能;对于设备层,控制软件不但要完成对天体目标的精确指向和精密跟踪、计算并补偿系统误差和控制关键部件以达到目标像质,而且需实现对电源分配系统、除霜及加热系统的控制、设备及环境信息的采集和监测等。相比于普通台址,在南极大陆运行的光学天文望远镜有其独特的特点,控制软件需进行特殊设计。本文重点从操作系统选择、远程建立望远镜指向误差修正模型方法、全自动观测软件接口、卫星通信及远程运维、望远镜实时状态监测和故障诊断等方面探讨了南极天文光学望远镜控制软件的关键技术和设计原则,并展望未来技术的发展,为南极天文望远镜的研制和控制系统研发提供技术储备。 展开更多
关键词 光学天文望远镜 控制软件 无人值守运行 全自动观测 指向误差修正 故障诊断 南极洲
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一种移动平台红外搜索跟踪系统的稳定控制方法
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作者 熊辉 李锐华 +10 位作者 刘海 阎歆婕 舒骏逸 郑婕 冯建伟 冯若涵 林宇 吴佳俊 林丹丹 宋治杭 张晋 《红外技术》 CSCD 北大核心 2024年第6期634-645,共12页
基于移动平台的红外搜索跟踪系统已成为新一代光电搜索跟踪系统的主流趋势,小型化和轻量化是其高机动性的保证。载体运动姿态变化耦合的角速度扰动和系统内部力矩干扰将对其搭载的光电载荷视轴稳定控制带来严峻挑战,基于多轴多框架和高... 基于移动平台的红外搜索跟踪系统已成为新一代光电搜索跟踪系统的主流趋势,小型化和轻量化是其高机动性的保证。载体运动姿态变化耦合的角速度扰动和系统内部力矩干扰将对其搭载的光电载荷视轴稳定控制带来严峻挑战,基于多轴多框架和高精度陀螺反馈控制相结合的传统视轴稳定方法已无法适用。本文针对两轴两框架移动平台红外搜索跟踪系统的光电载荷视轴稳定控制,提出了基于平方PI和Luenberger扰动观测前馈的双速度闭环同阶串级控制方法。仿真和实验表明,相对于传统的单陀螺闭环和双速度闭环稳定控制方法,该稳定控制方法有效提升了载体运动低频扰动下的视轴稳定精度。1°/1 Hz扰动下,仿真稳定精度达到2.7817μrad,实验稳定精度达到35.85μrad。1°/2 Hz扰动下,仿真稳定精度达到38.199μrad,实验稳定精度达到119.1μrad。最终,利用本文提出的稳定控制方法,两轴两框架移动平台红外搜索跟踪系统有效克服了行进间载体运动姿态变化耦合的低频角速度扰动,实现了高平稳高动态的光电载荷视轴指向控制性能。 展开更多
关键词 移动平台 红外搜索跟踪系统 视轴稳定 同阶串级 平方PI 扰动观测前馈
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