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Mahalanobis distance-based fading cubature Kalman filter with augmented mechanism for hypersonic vehicle INS/CNS autonomous integration

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Chinese Journal of Aeronautics 2022年第5期35卷 114-128页

作者： Bingbing GAO Wenmin LI Gaoge HU yongmin zhong Xinhe ZHU School of Automation Northwestern Polytechnical UniversityXi’an 710072China School of Engineering RMIT UniversityBundooraVIC 3083Australia

Inertial Navigation System/Celestial Navigation System(INS/CNS)integration,especially for the tightly-coupled mode,provides a promising autonomous tactics for Hypersonic Vehicle(HV)in military ***,INS/CNS integration is a challenging research task due to its special characteristics such as strong nonlinearity,non-additive noise and dynamic *** paper presents a novel nonlinear filtering method for INS/CNS integration by adopting the emerging Cubature Kalman Filter(CKF)to handle the strong INS error model nonlinearity caused by HV's high *** combines the state-augmentation technique into the nonlinear CKF to decrease the negative effect of non-additive noise in inertial ***,a technique for the detection of dynamic model uncertainty is developed,and the augmented CKF is modified with fading memory to tackle dynamic model uncertainty by rigorously deriving the fading factor via the theory of Mahalanobis distance without artificial *** results and comparison analysis prove that the proposed method can effectively curb the adverse impacts of non-additive noise and dynamic model uncertainty for inertial measurements,leading to improved performance for HV navigation with tightly-coupled INS/CNS integration.

关键词： Autonomous integration Fading factor Hypersonic vehicle Inertial navigation systems Kalman filters Mahalanobis distance

Cubature Kalman filter with closed-loop covariance feedback control for integrated INS/GNSS navigation

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Chinese Journal of Aeronautics 2023年第5期36卷 363-376页

作者： Bingbing GAO Gaoge HU Lei ZHANG yongmin zhong Xinhe ZHU Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China School of Automation Northwestern Polytechnical UniversityXi’an 710072China Aviation Industry Corporation of China(AVIC) Xi’an Aeronautic Computing Technique Research Institute(ACTRI)Xi’an 710068China School of Engineering RMIT UniversityBundooraVIC 3083Australia

Cubature Kalman Filter(CKF)offers a promising solution to handle the data fusion of integrated nonlinear INS/GNSS(Inertial Navigation System/Global Navigation Satellite System)***,its accuracy is degraded by inaccurate kinematic noise statistics which originate from disturbances of system *** paper develops a method of closed-loop feedback covariance control to address the above problem of *** this method,the posterior state and its covariance are fed back to the filtering process to constitute a closed-loop structure for CKF covariance ***,based on the maximum likelihood principle,a control scheme of the prior state covariance is established by using the feedback state and covariance within an estimation window and further adopting a proportional coefficient to amplify the feedback terms in recent time steps for the full use of new information to reflect actual system *** it does not directly use kinematic noise covariance,the proposed method can effectively avoid the adverse impact of inaccurate kinematic noise statistics on filtering ***,it can also guarantee the prior state covariance to be positive semi-definite without involving extra *** efficacy of the proposed method is validated by simulations and experiments for integrated INS/GNSS navigation.

关键词： Covariance control Inertial navigation system Kalman filter Maximum likelihood Proportional coefficient

Tightly coupled INS/CNS/spectral redshift integrated navigation system with the aid of redshift error measurement

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Science China(Technological Sciences) 2023年第9期66卷 2597-2610页

作者： GAO GuangLe GAO SheSheng HU GaoGe zhong yongmin PENG Xu School of Automation Northwestern Polytechnical UniversityXi’an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China School of Engineering RMIT University in MelbourneVIC 3000Australia

The integration of an inertial navigation system(INS) and a celestial navigation system(CNS) has the superiority of high autonomy. However, its reliability and accuracy are permanently impaired under poor observation conditions. To address this issue, the present paper proposes a tightly coupled INS/CNS/spectral redshift(SRS) integration framework based on the spectral redshift error measurement. In the proposed method, a spectral redshift error measurement equation is investigated and embedded in the traditional tightly coupled INS/CNS integrated navigation system to achieve better anti-interference under complicated circumstances. Subsequently, the inaccurate redshift estimation from the low signal-to-noise ratio spectrum is considered in the integrated system, and an improved chi-square test-based covariance estimation method is incorporated in the federated Kalman filter, allowing to deal with measurement outliers caused by the inaccurate redshift estimation but not influencing the effect of other correct redshift measurements in suppressing the error of the navigation parameter on the filtering solution. Simulations and comprehensive analyses demonstrate that the proposed tightly coupled INS/CNS/SRS integrated navigation system can effectively handle outliers and outages under hostile observation conditions, resulting in improved performance.

关键词： INS/CNS integrated navigation spectral redshift navigation spectral redshift error measurement equation inaccurate spectral redshift fault-tolerance

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测量造型技术中的散乱数据规则化处理方法

西北工业大学学报 1999年第4期17卷 567-571页

作者：种永民杨海成王争鸣姜寿山西北工业大学西安工业学院

针对测量造型技术中的散乱数据处理问题，提出了一个实用的散乱数据规则化方法。该方法基于散乱数据的三角剖分，建立五次Ｃ１三角插值曲面，用平行平面截取三角曲面得到截面线数据，对截面线数据进行去重点、光顺、匀化等处理，得到... 详细信息

针对测量造型技术中的散乱数据处理问题，提出了一个实用的散乱数据规则化方法。该方法基于散乱数据的三角剖分，建立五次Ｃ１三角插值曲面，用平行平面截取三角曲面得到截面线数据，对截面线数据进行去重点、光顺、匀化等处理，得到规则的四边形网格数据。该方法已经应用于实际工程中，具有简单、有效、通用性强、稳定性好等特点。

关键词：测量造型散乱数据处理三角剖分规则化处理

Potassium ions and cyano group modified g-C3N4 for effective generation of H2O2 through two-electron oxygen reduction

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Science China Chemistry 2025年第1期 192-200页

作者： Dongying Wang Shulan Pu yongmin Chen Ke Lei Yujie Duan Linjiao Mao Xuhui Zeng Xi Luo Yuntao Zhang Yuqin Dong Jin zhong Zhang Yan Sun School of Mechanical Engineering Chengdu University Department of Chemistry and Biochemistry University of California

Potassium ions （K+） doped graphitic carbon nitride （g-C3N4） was prepared by a thermal etching method using potassium hydroxide （KOH） as an ion *** transform infrared spectroscopy （FTIR） and X-ray photoelectron spectroscopy （XPS）results showed that the generation of the cyano group was detected while introducing K+.Under simulated sunlight irradiation,the sample with a K+doping amount of 10%showed the highest hydrogen peroxide （H2O2） generation rate of2,140.2μmol *** apparent quantum yield （AQY） at 400 nm and the solar-to-chemical conversion （SCC） are 4.35%and1.23%,respectively.K+acted as a bridge between g-C3N4layers,which enhanced charge transfer ***,the cyano group enhanced the adsorption capacity of protons （H+） and promoted the yield of *** catalyst exhibited excellent photocatalytic stability based on four-cycle *** addition,a mechanism study showed that superoxide radicals （·O2-）were the most important active species in the reaction *** production of H2O2was achieved through consecutive single-electron *** study deepens the understanding of the oxygen reduction reaction process and opens up a new venue for improving H2O2generation.

关键词：

同方期刊数据库

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CIGMA系统及其测量造型子系统

西北工业大学学报 1999年第3期17卷 433-438页

作者：种永民杨海成西北工业大学

通过介绍以飞机为对象的集成制造系统ＣＩＧＭＡ，给出了一个实现计算机辅助设计技术集成的解决方案，如集成系统结构、数据管理模式等。与其它集成系统不同，ＣＩＧＭＡ系统不但具有数据统一、资源共享、易于信息交换、实... 详细信息

通过介绍以飞机为对象的集成制造系统ＣＩＧＭＡ，给出了一个实现计算机辅助设计技术集成的解决方案，如集成系统结构、数据管理模式等。与其它集成系统不同，ＣＩＧＭＡ系统不但具有数据统一、资源共享、易于信息交换、实时处理等特点，而且还具有测量造型的功能。ＣＩＧＭＡ测量造型子系统解决了飞机、汽车等行业普遍存在的无图纸实物的设计问题，具有自动化程度高、通用性强、易于修改、便于误差实时控制等特点，尤其是对于外形复杂、棱线较多的实物进行测量造型具有较好的效果。ＣＩＧＭＡ系统及其测量造型子系统已经应用于工业生产中，取得了显著的效益。

关键词：集成制造系统测量造型子系统飞机 CIGMA

Virtual Reality Based Solid Modeling

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Virtual Reality Based Solid Modeling

第五届全球智能控制与自动化大会会议

作者： yongmin zhong and Xiaobu YuanSchool of Computer ScienceUniversity of Windsor Windsor Ontario N9B 3P4 Canada Weiyin Ma Dep. of Manufacturing Engineering & Engineering ManagementCity University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong

＜正＞ This paper presents an approach for intuitive and precise solid modeling in virtual reality environments. It develops a hierarchically structured and constraint-based data model to support object modeling, and uses automatic constraint recognition and precise constraint satisfaction to assist object manipulation. The proposed data model integrates a high-level constraint-based model, a mid-level hybrid solid model, and a low-level polygon model for object definition, object creation, and real-time interaction respectively. Constraint-based modeling operations and typical locating methods are also provided in the paper with details.

关键词： Virtual reality solid modeling model representation constraint-based manipulations.

来源： cnki会议评论

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连铸机开浇炉次与时间决策的多目标优化

计算机集成制造系统 2017年第2期23卷 261-272页

作者：龚永民郑忠龙建宇高小强重庆大学材料科学与工程学院重庆400045 攀枝花钢铁集团公司提钒炼钢厂四川攀枝花617000 重庆大学经济与工商管理学院重庆400044

针对连铸机开浇决策中的炉次选择、排序与开浇时间确定的多目标优化问题,以炼钢厂生产批量计划执行情况的总惩罚、生产线积压金属量、优质铁水非有效利用量最小为目标函数,构建了连铸机开浇炉次与时间决策的多目标优化模型。针对该模型... 详细信息

针对连铸机开浇决策中的炉次选择、排序与开浇时间确定的多目标优化问题,以炼钢厂生产批量计划执行情况的总惩罚、生产线积压金属量、优质铁水非有效利用量最小为目标函数,构建了连铸机开浇炉次与时间决策的多目标优化模型。针对该模型特点设计了改进的非支配排序遗传算法,以预选池内选择的炉次序号为基因的编码方式减小模型解的无效搜索空间,采取调整传统精英解集的计算顺序、限定计算拥挤距离个体数目的改进措施来减轻计算负荷,利用对Pareto解进行模糊选优的方法确定最终优化解。以某钢厂的生产实例数据测试表明,该模型有利于连铸生产炉次浇铸周期的稳定控制,算法效率优于传统的非支配排序遗传算法和强度Pareto进化算法。

关键词：连铸机生产调度开浇决策多目标优化改进的非支配排序遗传算法

Land use change and its ecological effect in Qian’an County of Jilin Province

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Journal of Geographical Sciences 2003年第4期13卷 423-428页

作者： zhongLinsheng ZHANGyongmin ZHAOShidong KarlE.Rvavec Inst.ofGeographicSciencesandNaturalResourcesResearch CASBeijing100101China DepartmentofGeography UniversityofMinnesotaMN55455USA

Based on GIS and statistical methods, with the help of searching historical literatures and calculating the landscape indices, the land use changes of Qian'an County in both spatial and temporal aspects from 1945 to 1996 has been analyzed in this paper. And the driving forces of land use changes and their ecological effects are discussed too. The main findings of this study are as follows: (1) Land use changed greatly in Qian'an during 1945-1996, characterized by a decrease in grassland, wetland and water bodies, and an increase in cultivated land, saline-alkali land, and the land for housing and other construction purposes. Grassland decreased by 175,828.66 ha, and cultivated land increased by 102,137.23 ha over the half century. Accordingly, the main landscape type changed from a steppe landscape to a managed agricultural ecosystem. (2) Results of correlation analysis show that the land use change in the study area was mainly driven by the socioeconomic factors. (3) The ecological effects of land use change in the area are characterized by serious salinization, degression of soil fertility and the weakening of landscape suitability.

关键词： land use change ecological effect land degradation Qian'an County