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Space Flight Validation of Design and Engineering of the ZDPS-1A Pico-satellite

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Chinese Journal of Aeronautics 2012年第5期25卷 725-738页

作者： YANG Mu WANG Hao WU Changju WANG Chunhui DING Licong ZHENG Yangming jin zhonghe Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China School of Aeronautics and Astronautics Zhejiang University Hangzhou 310027 China

The ZDPS-1A pico-satellites are the first satellites in China within the 1-10 kg mass range that are successfully operated on orbit. Unlike common pico-satellites, they are designed to be ＂larger but stronger＂ with more powerful platforms and unique payloads so as to bear a better promise for real applications. Through their space flight mission, the functionality and perform- ance of the two flight models are tested on orbit and validated to be mostly normal and in consistency with design and ground tests with only several inconforming occasions. Moreover, they have worked properly on orbit for one year so far, well exceed- ing their life expectancy of three months. Therefore, the space flight mission has reached all its goals, and verified that the design concept and the engineering process of the pico-satellites are sufficient in allowing them the desired functionality and perform- ance in, and the adaption to the launch procedure and the low-Earth orbit space environment. In the foreseeable future, the plat- form together with the design concept and the engineering process of the pico-satellites are expected to be applied to more com- plicated real space applications.

关键词： systems engineering ZDPS-IA pico-satellite space environmental adaption space flight track telemetry and control attitude control

Temperature Bias Drift Phase-Based Compensation for a MEMS Accelerometer with Stiffness-Tuning Double-Sided Parallel Plate Capacitors

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Nanomanufacturing and Metrology 2023年第3期6卷 29-40页

作者： Mingkang Li Zhipeng Ma Tengfei Zhang Yiming jin Ziyi Ye Xudong Zheng zhonghe jin School of Aeronautics and Astronautics Zhejiang UniversityHangzhou310013China Key Laboratory of Micro/Nano-Satellite Research of Zhejiang Province Hangzhou310007China

This paper reports an approach of in-operation temperature bias drift compensation based on phase-based calibration for a stiffness-tunable MEMS accelerometer with double-sided parallel plate(DSPP)*** temperature drifts of the components of the accelerometer are characterized,and analytical models are built on the basis of the measured drift *** reveal that the temperature drift of the acceleration output bias is dominated by the sensitive mechanical *** out-of-bandwidth AC stimulus signal is introduced to excite the accelerometer,and the interference with the acceleration measurement is *** demodulated phase of the excited response exhibits a monotonic relationship with the effective stiffness of the *** the proposed online compensation approach,the temperature drift of the effective stiffness can be detected by the demodulated phase and compensated in real time by adjusting the stiffness-tuning voltage of DSPP *** temperature drift coefficient(TDC)of the accelerometer is reduced from 0.54 to 0.29 mg/℃,and the Allan variance bias instability of about 2.8μg is not adversely ***,the pull-in resulting from the temperature drift of the effective stiffness can be *** can be further reduced to 0.04 mg/℃through an additional offline calibration based on the demodulated carrier phase representing the temperature drift of the readout circuit.

关键词： MEMS accelerometer Stiffness tuning Double-sided parallel plates Temperature drift compensation

A spaceborne advanced storage system for remote sensing microsatellites

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Frontiers of Information Technology & Electronic Engineering 2024年第4期25卷 600-615页

作者： Shilei TU Huiquan WANG Yue HUANG zhonghe jin Micro-Satellite Research Center Zhejiang UniversityHangzhou 310027China Key Laboratory of Micro-Nano Satellite Research Zhejiang ProvinceHangzhou 310027China

With the development of satellite miniaturization and remote sensing,the establishment of microsatellite constellations is an inevitable *** to their limited size,weight,and power,spaceborne storage systems with excellent scalability,performance,and reliability are still one of the technical bottlenecks of remote sensing *** on the commercial off-the-shelf field-programmable gate array and memory devices,a spaceborne advanced storage system(SASS)is proposed in this *** work provides a dynamic programming,queue scheduling multiple-input multiple-output cache technique and a high-speed,high-reliability NAND flash controller for multiple microsatellite payload *** results show that SASS has outstanding scalability with a maximum write rate of 2429 Mb/s and preserves at least 78.53%of the performance when a single NAND flash *** scheduling technique effectively shortens the data scheduling time,and the data remapping method of the NAND flash controller can reduce the retention error by at least 50.73%and the program disturbance error by at least 37.80%.

关键词： Microsatellite Spaceborne advanced storage system(SASS) Scalability Performance Reliability

ModiΡed pseudo-noise code regeneration method

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Journal of Systems Engineering and Electronics 2010年第3期21卷 370-374页

作者： Xiaojun jin zhonghe jin Chaojie Zhang Jianwen Jiang Yangming Zheng Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 R R. China

A modiΡed pseudo-noise（PN） code regeneration method is proposed to improve the clock tracking accuracy without impairing the code acquisition time ***,the method can meet the requirement of high accuracy ranging measurements in short time periods demanded by radio-science *** tracking error variance is derived by linear *** some existing PN codes,which can be acquired rapidly,the tracking error variance performance of the proposed method is about 2.6 dB better than that of the JPL scheme（originally proposed by Jet Propulsion Laboratory）,and about 1.5 dB better than that of the traditional double loop scheme.

关键词： regenerative pseudo-noise (PN) ranging chip tracking loop tracking error variance code acquisition time.

Camera calibration method for an infrared horizon sensor with a large field of view

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Frontiers of Information Technology & Electronic Engineering 2023年第1期24卷 141-153页

作者： Huajian DENG Hao WANG Xiaoya HAN Yang LIU zhonghe jin Micro-Satellite Research Center Zhejiang UniversityHangzhou 310027China Zhejiang Key Laboratory of Micro-nano Satellite Research Hangzhou 310027China Beijing Institute of Tracking and Telecommunications Technology Beijing 100094China

Inadequate geometric accuracy of cameras is the main constraint to improving the precision of infrared horizon sensors with a large field of view(FOV).An enormous FOV with a blind area in the center greatly limits the accuracy and feasibility of traditional geometric calibration methods.A novel camera calibration method for infrared horizon sensors is presented and validated in this *** infrared targets are used as control *** camera is mounted on a rotary *** the table rotates,these control points will be evenly distributed in the entire *** with traditional methods that combine a collimator and a rotary table which cannot effectively cover a large FOV and require harsh experimental equipment,this method is easier to implement at a low cost.A corresponding three-step parameter estimation algorithm is proposed to avoid precisely measuring the positions of the camera and the control *** are implemented with 10 infrared horizon sensors to verify the effectiveness of the calibration *** results show that the proposed method is highly stable,and that the calibration accuracy is at least 30%higher than those of existing methods.

关键词： Infrared horizon sensor Ultra-field infrared camera Camera calibration

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基于优化粒子群算法的微纳卫星电机参数整定

电机与控制学报 2024年第10期28卷 13-23页

作者：周航王昊金仲和浙江大学微小卫星研究中心浙江杭州310058 浣江实验室浙江诸暨311800 浙江省微纳卫星研究重点实验室浙江杭州310058

针对传统PID控制器控制无刷电机时系统响应慢、速度波动大的问题,以及手动整定大规模电机参数繁琐重复的问题,采用了一种基于粒子群优化算法的无刷直流电机PID参数整定方法,用于确定电机闭环控制系统中PI控制器的参数。首先建立磁场定... 详细信息

针对传统PID控制器控制无刷电机时系统响应慢、速度波动大的问题,以及手动整定大规模电机参数繁琐重复的问题,采用了一种基于粒子群优化算法的无刷直流电机PID参数整定方法,用于确定电机闭环控制系统中PI控制器的参数。首先建立磁场定向控制技术驱动的无刷直流电机控制系统仿真模型,然后在此模型上应用优化粒子群算法进行参数整定优化的迭代过程,得到整定后的控制器参数结果。分析优化粒子群算法整定后的电机速度响应和力矩输出情况,并与传统手动整定结果和其他算法的整定结果进行对比。实验结果表明,提出的优化粒子群算法整定的控制器速度响应更快并且输出力矩更稳定,并且对电机参数的小幅度变化有鲁棒性,该方法可以适用于大规模同类别同批次的电机控制器参数标定。

关键词：微纳卫星控制系统无刷直流电机 PID控制参数整定粒子群算法

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ZDPS-2卫星可靠性试验评估方法

系统工程与电子技术 2019年第2期41卷 453-458页

作者：王婵王慧泉金仲和靳鑫浙江大学微小卫星研究中心江苏杭州310027

皮纳卫星具有研制周期短、采用商用货架式器件的特点,无法完整沿用传统大卫星通过底层元器件或部组件搭建系统可靠性模型计算整星可靠性的方法。针对上述问题,提出了基于试验数据的皮纳卫星可靠性评估体系。通过对机理不同的硬件和软件... 详细信息

皮纳卫星具有研制周期短、采用商用货架式器件的特点,无法完整沿用传统大卫星通过底层元器件或部组件搭建系统可靠性模型计算整星可靠性的方法。针对上述问题,提出了基于试验数据的皮纳卫星可靠性评估体系。通过对机理不同的硬件和软件故障分别建模的方法,实现了ZDPS-2卫星的可靠性评估。对卫星的硬件故障数,基于顺序约束模型和贝叶斯参数估计方法进行拟合,并考虑了不同试验环境对卫星工作环境的等效因子。ZDPS-2卫星硬件可靠性水平估计为3月末0.85。对卫星的软件故障采用加入变点的非齐次泊松过程模型拟合,并选择Logistic模型作为测试覆盖率模型。ZDPS-2卫星软件故障拟合结果,平均无故障时间为217h。ZDPS-2卫星试验结果证实,可靠性满足增长试验设计的要求和任务需求。

关键词：可靠性评估皮纳卫星顺序约束模型非齐次泊松过程

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皮纳卫星遥测数据异常检测聚类分析方法

哈尔滨工业大学学报 2018年第4期50卷 110-116页

作者：王婵王慧泉金仲和浙江大学微小卫星研究中心杭州310027

为满足皮纳卫星高维遥测数据的实时、自动化、抗概念漂移等处理要求,提出一种基于聚类的遥测数据异常检测方法,包括子空间搜索和两阶段遥测数据聚类处理两部分.子空间搜索,通过熵值实现所有遥测数据低维子空间划分,降低计算复杂度,避免... 详细信息

为满足皮纳卫星高维遥测数据的实时、自动化、抗概念漂移等处理要求,提出一种基于聚类的遥测数据异常检测方法,包括子空间搜索和两阶段遥测数据聚类处理两部分.子空间搜索,通过熵值实现所有遥测数据低维子空间划分,降低计算复杂度,避免"维度灾难"的发生;两阶段遥测数据聚类处理,在线阶段通过网格索引实时发现单点异常,离线阶段通过聚类挖掘数据的集体异常及其特征,满足快速异常检测和复杂异常检测两种需求,并通过正常状态数据的迭代更新和算法的自适应修改,抵抗概念漂移.ZDPS-1A卫星历史遥测数据的分析结果表明,皮纳卫星遥测数据异常检测聚类方法在线阶段能实时处理10 kHz的流量数据,发现95%的单点异常,满足皮纳卫星实时遥测数据异常检测的一般需求;算法自适应了卫星快速转动导致的数据漂移,维持了稳定的单簇形态;同时相比原边界检查系统早一个月检测出姿态确定与控制系统中程序跑飞引起的太阳敏感器数据紊乱故障.所提出的算法针对性解决了高维、存在概念漂移的遥测数据异常检测问题,能实时检测单点异常,具有集体异常挖掘能力,适用于皮纳卫星星座组网的地面监控系统.

关键词：皮纳卫星异常检测遥测数据聚类在线检测子空间搜索

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基于有限差分的大角度交叉波导光束传输法

中国激光 2008年第2期35卷 231-234页

作者：王世军马慧莲金仲和浙江大学信息与电子工程系浙江杭州310027

采用有限差分光束传输法(FDBPM)分析光波在大角度交叉区域的传输过程,利用pad近似解决大角度传输问题;利用透明边界条件弥补边界光波反射现象,通过追赶法编程计算有限差分方程组,得到在一定光波导结构条件下传输损耗与交叉角度之间的... 详细信息

采用有限差分光束传输法(FDBPM)分析光波在大角度交叉区域的传输过程,利用pad近似解决大角度传输问题;利用透明边界条件弥补边界光波反射现象,通过追赶法编程计算有限差分方程组,得到在一定光波导结构条件下传输损耗与交叉角度之间的关系。在此基础上,利用低压化学气相沉积技术在硅衬底上制作了二氧化硅交叉波导结构,实验结果表明有限差分光束传输法在分析大角度交叉时具有比较高的计算精度。

关键词：导波光学交叉波导光束传输法大角度