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Nonlinear Adaptive Fault Estimation for Actuator Faults of Non-Gaussian Uncertain Systems with Sensor Measurement Error

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Nonlinear Adaptive Fault Estimation for Actuator Faults of N...

Adaptive Actuator Fault Estimation of Stochastic Systems with Output Measurement Error

第三十九届中国控制会议

作者： kaiyu hu Fuyang Chen Zian Cheng College of Automation Engineering Nanjing University of Aeronautics and Astronautics

This paper presents an actuator fault estimation method in non-Gaussian uncertain stochastic systems with sensor measurement *** that multi-source nonlinearities of a class of stochastic systems cannot be approximated by a unified method,fuzzy logic is used to linearize nonlinear parameters,and the Lipschitz condition helps to proof the stability of the systems with nonlinear sensing ***,to handle the sensor measurement error,an adaptive compensation scheme is *** measurement error occurs,the feedback contains the error information,and a feedback error composite function in the controller direct compensates the measurement *** multiple actuator faults occur,an adaptive fusion observer simultaneously implements error masking and actuator fault estimation,Lyapunov functions prove the robust stability of the proposed fault estimation systems with measurement error,and simulation experiment verifies the performance.

关键词： Fault estimation Actuator faults Sensor measurement error Uncertain systems

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Adaptive Actuator Fault Estimation of Stochastic Systems wit...

Research progress of catalysts for direct coal liquefaction

第32届中国控制与决策会议

作者： kaiyu hu Fuyang Chen Zian Cheng College of Automation Engineering Nanjing University of Aeronautics and Astronautics

This study investigates adaptive fault estimation for non-Gaussian stochastic systems with actuator faults and output measurement *** fuzzy linearization for the singular systems,the output probability density function is generated by rational square root *** deal with the intermittent multiple actuator faults,an improved adaptive fault estimation is proposed:A compensation function can directly reconstruct the algorithm to mask the output measurement error;then,actuator fault estimation accurately tracks the multiple actuator faults.A novel variable parameter algorithm that mimics animal predation behavior is designed and incorporated into learning rates,making the controller more sensitive to the incipient deviations in actuator *** Lyapunov function proves the stability,simulation verifies the effectiveness of the method.

关键词： Fault estimation Actuator faults Prey algorithm Stochastic systems

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Journal of Energy Chemistry 2025年第1期100卷 481-497页

作者： Wei Song Penggao Liu Xinyue Chen Ting Wang Chunrong He Rui Hao kaiyu Liu State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830017XinjiangChina College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454003HenanChina hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083HunanChina

Coal direct liquefaction technology is a crucial contemporary coal chemical technology for efficient and clean use of coal resources. The development of direct coal liquefaction technology and the promotion of alternative energy sources are important measures to guarantee energy security and economic security. However, several challenges need to be addressed, including low conversion rate, inadequate oil yield, significant coking, demanding reaction conditions, and high energy consumption. Extensive research has been conducted on these issues, but further exploration is required in certain aspects such as pyrolysis of macromolecules during the liquefaction process, hydrogen activation, catalysts' performance and stability, solvent hydrogenation, as well as interactions between free radicals to understand their mechanisms better. This paper presents a comprehensive analysis of the design strategy for efficient catalysts in coal liquefaction, encompassing the mechanism of coal liquefaction, catalyst construction,and enhancement of catalytic conversion efficiency. It serves as a comprehensive guide for further research endeavors. Firstly, it systematically summarizes the conversion mechanism of direct coal liquefaction, provides detailed descriptions of various catalyst design strategies, and especially outlines the catalytic mechanism. Furthermore, it addresses the challenges and prospects associated with constructing efficient catalysts for direct coal liquefaction based on an understanding of their action mechanisms.

关键词： Direct coal liquefaction Catalysts Mechanismof action Solvent hydrogenation

Genomic insights into demographic history,structural variation landscape,and complex traits from 514 hu sheep genomes

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Journal of Genetics and Genomics 2025年第2期52卷 245-257页

作者： kaiyu Chen Yuelang Zhang Yizhe Pan Xin Xiang Chen Peng Jiayi He Guiqing huang Zhengguang Wang Pengju Zhao College of Animal Sciences Zhejiang UniversityHangzhouZhejiang 310058China Hainan Institute Zhejiang UniversitySanyaHainan 572000China Agricultural Product Quality and Safety Research Center of huzhou City HuzhouZhejiang 313000China

hu sheep is an indigenous breed from the Taihu Lake Plain in China,known for its high *** hu sheep belong to the Mongolian group,their demographic history and genetic architecture remain ***,we analyze 697 sheep genomes from representatives of Mongolian sheep *** study suggests that the ancestral hu sheep first separated from the Mongolian group approximately 3000 years *** hu sheep migrated from the north and flourished in the Taihu Lake Plain around 1000 years ago,they developed a unique genetic foundation and phenotypic characteristics,which are evident in the genomic footprints of selective sweeps and structural variation *** associated with reproductive traits(BMPR1B and TDRD10)and horn phenotype(RXFP2)exhibit notable selective sweeps in the genome of hu sheep.A genome-wide association analysis reveals that structural variations at LOC101110773,MAST2,and ZNF385B may significantly impact polledness,teat number,and early growth in hu sheep,*** study offers insights into the evolutionary history of hu sheep and may serve as a valuable genetic resource to enhance the understanding of complex traits in hu sheep.

关键词： hu sheep Population sequencing Demographic history Structural variation Genome-wide association study

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刚性带式输送机机尾伸缩免插架装置设计

煤矿机械 2022年第1期43卷 111-113页

作者：胡开宇中国煤炭科工集团太原研究院有限公司太原030006

介绍了煤矿综掘工作面伸缩免插架装置。该装置通过伸缩刚性托辊H架实现综掘生产班不停机即可延伸H架的作业方式。介绍了伸缩免插架装置的结构设计与整体掘进设备的巧妙结合,很大程度上提高了掘进效率,在实际应用中产生了巨大的经济效益。

关键词：综掘工作面免插H架装置结构设计

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端信息跳变技术研究综述

计算机应用研究 2021年第8期38卷 2251-2257页

作者：楼威振李海龙胡楷钰火箭军工程大学作战保障学院西安710025

随着计算机网络技术的飞速发展,新型攻击手段层出不穷,而传统的静态被动防御手段难以有效应对。端信息跳变是一项网络动态防御技术,能够主动防御网络攻击,保护重要网络节点。该技术借鉴跳频通信技术的思想,通过伪随机地改变通信双方或... 详细信息

随着计算机网络技术的飞速发展,新型攻击手段层出不穷,而传统的静态被动防御手段难以有效应对。端信息跳变是一项网络动态防御技术,能够主动防御网络攻击,保护重要网络节点。该技术借鉴跳频通信技术的思想,通过伪随机地改变通信双方或一方的端信息,隐藏重要节点,增加攻击者的攻击难度和攻击成本,干扰甚至破环攻击者的攻击,实现网络主动防御。首先进行了端信息跳变技术研究现状的调查,按照跳变项进行分类并分析了优缺点。然后针对现有核心难点技术的用途和优缺点进行了全面概述。最后讨论未来可能的发展方向。

关键词：端信息跳变网络动态防御主动防御网络安全

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59个耀变体的15.3GHz光变周期分析

天文研究与技术 2015年第4期12卷 410-416页

作者：米立功崔朗胡开宇黔南民族师范学院贵州都匀558000 中国科学院新疆天文台新疆乌鲁木齐830011

使用活动星系核射电喷流的VLBA监测实验(Monitoring Of Jets in Active galactic nuclei with VLBA Experiments,MOJAVE)的15.3 GHz超长基线阵列(Very Long Baseline Array,VLBA)观测数据,利用功率谱密度函数方法对59个耀变体的光变曲线进行了周期分析,结果表明这59个耀变体的光变曲线显示了从2.6年到11.1年的可能的光变周期。分析了59个光变周期与其红移的关系,结果表明二者没有相关性,进一步搜集了14.5 GHz波段上的110个活动星系核的周期并分析了它们的周期与红移的关系,结果表明二者没有相关性。

关键词：周期分析功率谱密度活动星系核:耀变体

卡氏天线副面补偿技术中副面焦点坐标调整量的高精度数据拟合

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航空学报 2014年第12期35卷 3425-3437页

作者：胡开宇艾力.玉苏甫徐雪林项斌斌刘奇中国科学院新疆天文台新疆乌鲁木齐830011 中国科学院大学物理科学学院北京100190 北京航空航天大学自动化科学与电气工程学院北京100191

基于新疆110m射电望远镜预研项目、南山天线改造计划和国家对航天领域的战略需求,对大型卡氏天线主面板变形的副面实时补偿作了深入研究。简单介绍了副面补偿的理论模型并用静力分析法得出若干特殊仰角下的调整量,进而运用MATLAB对调整... 详细信息

基于新疆110m射电望远镜预研项目、南山天线改造计划和国家对航天领域的战略需求,对大型卡氏天线主面板变形的副面实时补偿作了深入研究。简单介绍了副面补偿的理论模型并用静力分析法得出若干特殊仰角下的调整量,进而运用MATLAB对调整量进行了高精度的数据拟合。给出了线性最小二乘法和正交多项式最小二乘法2种拟合方法拟合模型方程,通过误差分析从不同方面对比了拟合方法的效果,在阶数为4、精确至小数点后15位时,2种拟合方法的误差差值数量级为10-13 mm,且小于零。最终选择并应用精度更高的正交多项式最小二乘拟合方法在特定的俯仰角度范围内生成了部分调整量数据,为副反射面在任意俯仰角下的补偿过程创造了条件,满足了天文观测和航天深空探测对数据准确性和系统可靠性的要求,具有一定的实用性。

关键词：天线副面数据拟合误差补偿误差分析

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基于多尺度窗口的自动调焦算法

弹箭与制导学报 2021年第1期41卷 135-138,144页

作者：张驰韩冬艳冉迪胡楷钰陆军装备部驻西安地区军事代表局驻西安地区第七军事代表室西安710065 西安现代控制技术研究所西安710065 陆军装备部驻西安地区军事代表局驻南阳地区第一军事代表室河南南阳710032

为了提高自动调焦算法的实时性,提出一种基于多尺度窗口的分段式自动调焦算法,首先使用小尺寸调焦窗口降低单幅图像清晰度值计算量,快速找到局部聚焦位置,然后以该位置作为二次调焦起点,适当增大调焦窗口范围,再以少量调焦步数完成全局... 详细信息

为了提高自动调焦算法的实时性,提出一种基于多尺度窗口的分段式自动调焦算法,首先使用小尺寸调焦窗口降低单幅图像清晰度值计算量,快速找到局部聚焦位置,然后以该位置作为二次调焦起点,适当增大调焦窗口范围,再以少量调焦步数完成全局聚焦位置的精确搜索。实验结果表明,该方法在保证成像系统准确聚焦的前提下,可有效降低量化图像清晰度所需的计算量,提升自动调焦的实时性。

关键词：调焦窗口自动调焦清晰度函数图像处理