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电液振动台加速度时域波形自适应控制策略

振动．测试与诊断 2024年第3期44卷 456-465,616页

作者：汤裕朱真才沈刚刘韩凌疆语中国矿业大学机电工程学院徐州221116

针对电液振动台加速度时域波形复现精度低的问题,提出了一种基于内环前馈逆补偿和外环非线性滤波的在线自适应控制策略。首先,构建了电液振动台伺服驱动机构模型,采用三状态控制策略获得了初步加速度控制性能;其次,基于多新息遗忘梯度... 详细信息

针对电液振动台加速度时域波形复现精度低的问题,提出了一种基于内环前馈逆补偿和外环非线性滤波的在线自适应控制策略。首先,构建了电液振动台伺服驱动机构模型,采用三状态控制策略获得了初步加速度控制性能;其次,基于多新息遗忘梯度算法辨识了三状态控制下系统参数化模型,利用零幅值跟踪技术构建了内环前馈逆补偿策略,拓展了系统频宽,降低了相位滞后误差;然后,引入了外环非线性Volterra自适应滤波算法,抑制了电液振动台模型参数偏差、非线性动态特性和不确定性扰动的影响;最后,在搭建的水平单轴电液振动台上开展了时域波形复现对比实验。结果表明,提出的自适应控制策略与传统策略相比具有更优越的加速度时域波形复现精度。

关键词：电液振动台三状态控制前馈逆控制自适应控制波形复现

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基于模型和样条的星敏感器在轨自标定方法

光学学报 2024年第12期44卷 254-262页

作者：闫浩东支帅陈旭睿李照雄丁国鹏张洋洋张永合朱振才中国科学院微小卫星创新研究院卫星数字化重点实验室上海201210 中国科学院大学北京100049 上海科技大学信息科学与技术学院上海201210

星敏感器长期在轨运行时,畸变会逐渐积累,因此对星敏感器进行在轨标定很有必要。目前,大多数星敏感器在轨标定算法仅依赖于星间角距的不变性,并需要较长的标定时间。本文算法的创新性在于利用星间角距关系和星点像素位置关系,将畸变信... 详细信息

星敏感器长期在轨运行时,畸变会逐渐积累,因此对星敏感器进行在轨标定很有必要。目前,大多数星敏感器在轨标定算法仅依赖于星间角距的不变性,并需要较长的标定时间。本文算法的创新性在于利用星间角距关系和星点像素位置关系,将畸变信息解耦为粗校准的参数化信息和精校准的非参数化信息。充分考虑到星敏感器的工作性质,利用B样条算法的特点,使得连续的在轨校正仅需极少的时间。相较于目前常用的地面标定算法,本文算法在实现更准确的星点位置校正和更精确的姿态输出精度的前提下,训练完全部数据只需要几百毫秒的时间。在经过本文算法的标定后,在轨星敏感器的星点位置偏差由0.55766 pixel降低为0.23706 pixel,测量精度由5.857″提高到2.775″,这为未来低成本卫星搭载非专业化设计的星敏感器提供了一定的算法参考。

关键词：星敏感器光学畸变在轨标定 B样条算法图像处理

基于深度神经网络的星敏感器成像在轨校正方法

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航天返回与遥感 2024年第4期45卷 71-80页

作者：陈旭睿闫浩东丁国鹏支帅张永合范城城李照雄朱振才中国科学院微小卫星创新研究院上海201203 中国科学院大学北京100049 上海科技大学上海201210

由于卫星在轨时受空间恶劣环境干扰,星敏感器相机在轨输出的图像相对于地面标定时产生畸变,制约其姿态测量的精度,且受在轨运行条件的限制难以进行实时有效的图像校正,造成星敏感器精度受限。针对以上问题,文章提出一种可用于在轨校正... 详细信息

由于卫星在轨时受空间恶劣环境干扰,星敏感器相机在轨输出的图像相对于地面标定时产生畸变,制约其姿态测量的精度,且受在轨运行条件的限制难以进行实时有效的图像校正,造成星敏感器精度受限。针对以上问题,文章提出一种可用于在轨校正星敏感器畸变的方法,通过构建星点畸变坐标与星库理论坐标的映射数据集来训练神经网络模型,拟合星敏感器成像的非线性畸变,实现高精度图像畸变校正。为了验证该方法的图像畸变校正能力,文章进行了模拟星图仿真试验,试验结果显示,星点测量坐标与理论坐标平均误差在校正后从0.7237像素降至0.0586像素。该结果表明文中所提出的校正方法可以使星敏感器解算精度得以显著提升,且具备在轨学习能力,可扩展应用到其他星上载荷的图像校正。

关键词：天文导航星敏感器神经网络畸变校正姿态估计

Dark Matter Particle Explorer, the First Satellite of China Space Science Pilot Project

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Aerospace China 2016年第1期17卷 4-11页

作者： zhu zhencai Shanghai Engineering Center For Microsatellites Shangha i2000501

The Dark Matter Particle Explorer(DAMPE) is the first high energy detector satellite in China,whose physics goal is to find evidence of the existence of dark matter particles by investigating the composition and energy spectra of primary cosmic rays,especially those for electrons,positrons and gamma rays,over the dynamic range from 5 Ge V to 10 Te *** is a satellite launched by China with the largest payload ratio,where the payload is composed of a BGO(Bismuth Germanate Oxide) Calorimeter,a Plastic Scintillator Detector,a Silicon Tungsten Tracker and a Neutron *** paper introduces the technical scheme of DAMPE,including requirement analysis,composition,technical innovation,on-orbit status and prospect of development for the future.

关键词： DAMPE Payload Orbit Structure Thermal control

Orbit Determination and Thrust Estimation for Noncooperative Target Using Angle-Only Measurement

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Space(Science & Technology) 2023年第1期3卷 496-513页

作者： Zhixun Zhang Leizheng Shu Keke Zhang zhencai zhu Meijiang Zhou Xinwei Wang Weidong Yin Innovation Academy for Microsatellites of Chinese Academy of Sciences Shanghai 200120China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Space Utilization Technology and Engineering Center for Space UtilizationChinese Academy of SciencesBeijing 100094China School of Engineering and Materials Science Queen Mary University of LondonE14NS LondonUK.

The classical interactive multimodel(IMM)algorithm has some disadvantages in tracking a noncooperative continuous thrust maneuvering spacecraft,such as poor steady-state accuracy,difficult selection of subfilter parameters,and mismatched model *** address the abovementioned problems,a variable-dimensional adaptive IMM strong tracking filtering algorithm(VAIMM-STEKF)is proposed to estimate the spacecraft’s position,velocity,and maneuvering acceleration ***-STEKF contains 2 models,model 1 and model 2,which correspond to the tracking of the spacecraft in maneuvering and nonmaneuvering *** 1 estimates the position and velocity of the spacecraft to ensure tracking accuracy when no maneuver *** 2 is a strong tracking filter with an augmented *** adaptive IMM algorithm adjusts the fixed Markov transfer matrix in real time according to the model output *** to the different states of the spacecraft,the corresponding model interactive fusion method,together with the strong tracking filter,is adopted to ensure fast tracking when the spacecraft state *** method can also adapt to continuous thrust maneuvering spacecraft with different orders of *** results show that the position accuracy of VAIMM-STEKF can be improved by approximately 27%and the speed accuracy can be enhanced by approximately 17%under different levels of maneuvering acceleration compared with those of the IMM *** convergence speed of VAIMM-STEKF is also better than the IMM algorithm.

关键词： acceleration interactive Angle

Hybrid-Traffic-Detour Based Load Balancing for Onboard Routing in LEO Satellite Networks

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China Communications 2018年第6期15卷 28-41页

作者： Peilong Liu Hongyu Chen Songjie Wei Limin Li zhencai zhu Shanghai Institute of Microsystem and Information Technology Chinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China Innovative Academy for Microsatellites Chinese Academy of SciencesShanghai 201203China School of Computer Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China College of Physics and Electronic Information Engineering Wenzhou UniversityWenzhou 325035China

To deal with the dynamic and imbalanced traffic requirements in Low Earth Orbit satellite networks, several distributed load balancing routing schemes have been proposed. However, because of the lack of global view, these schemes may lead to cascading congestion in regions with high volume of traffic. To solve this problem, a Hybrid-Traffic-Detour based Load Balancing Routing(HLBR) scheme is proposed, where a Long-Distance Traffic Detour(LTD) method is devised and coordinates with distributed traffic detour method to perform self-adaptive load balancing. The forwarding path of LTD is acquired by the Circuitous Multipath Calculation(CMC) based on prior geographical information, and activated by the LTDShift-Trigger(LST) through real-time congestion perception. Simulation results show that the HLBR can mitigate cascading congestion and achieve efficient traffic distribution.

关键词： satellite networks load balancing cascading congestion traffic detour

The Quantum Science Experiment Satellite, An Experimental Facility in Space for Testing of Quantum Information Theory

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Aerospace China 2017年第3期18卷 11-21页

作者： DENG Lei zhu zhencai Shanghai Engineering Center For Microsatellites Shanghai 200050

The Quantum Science Experiment Satellite(QUSES) is the first satellite deployed successfully in nearEarth space for quantum scientific experiments in the world, in which experimental study on the fundamental questions of quantum mechanics can be done under the condition of a spatial scale about 500-2000 km. QUSES is performing a Quantum Key Distribution(QKD) experiment from satellite to ground station for testing of the global quantum secure communication network, and performing a Quantum Entanglement Distribution(QED) and Quantum Teleportation(QT) experiments with the purpose of testing the completeness of quantum mechanics theory at a sufficient spatial scale. The payload of QUSES is com posed of a Quantum Key Transceiver(QKT), a Quantum Entanglement Transmitter(QET), a Quantum Entangled-photon Source(QES), a Quantum Experiment Control Processor(QCP) and a Coherent laser Communication Terminator(CCT). This paper introduces the technical scheme of QUSES, including the requirement analysis, composi tion, technical innovation, on-orbit status and prospect of development for the future.

关键词： QUSES alignment of optical axis tracking and pointing

Analysis on Tribological Properties of Potentially New Friction Material with Response Surface Method

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Journal of Wuhan University of Technology(Materials Science) 2011年第3期26卷 499-503页

作者：徐蕾 School of Mechanical and Electrical Engineering China University of Mining & Technology

The tribological properties of newly developed friction material were evaluated by statistical analysis of the major affecting *** material for investigation was non-metallic friction material synergistically reinforced with aramid fibre and CaSO 4 whisker,which was developed for hoisting applications in coal *** response surface method（RSM）was employed to analyze the material performances affected by the independent and interactive effect of the factors under the normal working condition and severe working condition,*** showed that under the normal working condition,the newly developed material exhibited stable tribological properties which were insensitive to the test *** under the severe working condition,the sliding velocity was the most dominant factor affecting the friction ***,compared to the commercially available material,the modified material showed superior wear resistance and thermal stability.

关键词： tribological properties friction material response surface method wear

复合工况条件下刮板输送机运料中板磨损行为研究

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摩擦学学报 2017年第4期37卷 472-478页

作者：史志远朱真才中国矿业大学机电工程学院江苏徐州221116 安标国家矿用产品安全标志中心北京100013

针对实际工况、环境介质综合影响刮板输送机运料中板磨损行为的复杂问题,开展中板与煤、矸石、水等混合物料的磨损试验,利用统计学原理、交互作用技术和现代摩擦学理论对获得的试验数据进行研究与分析.结果表明:中板磨损量随接触压力、... 详细信息

针对实际工况、环境介质综合影响刮板输送机运料中板磨损行为的复杂问题,开展中板与煤、矸石、水等混合物料的磨损试验,利用统计学原理、交互作用技术和现代摩擦学理论对获得的试验数据进行研究与分析.结果表明:中板磨损量随接触压力、滑动速度的增加而增加;在接触压力、滑动速度一定的情况下,磨损量随水、煤、矸石中的水的比例升高而减少;中板的磨损形式主要为磨粒磨损、黏着磨损、腐蚀磨损和疲劳磨损,分布在磨损机制分布图的轻度、中度及重度破坏区内.

关键词：滑动摩擦磨损试验磨损规律磨损机理工作面输送机