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An Optimization Design of the Weight of Cost Function in Stochastic Robustness Analysis and Design

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An Optimization Design of the Weight of Cost Function in Sto...

Dynamic Evaluation Strategies for Multiple Aircrafts Formation Using Collision and Matching Probabilities

第25届中国控制与决策会议

作者： Wen Yongming wu sentang School of Automation Science and Electrical Engineering Beihang University

ISBN: (纸本)9781467355339

The weight of cost function in Stochastic Robustness Analysis and Design reflects the emphasis on the corresponding metrics. Selecting and optimizing weights reasonably is particularly important for further highlighting the advantages of SRAD and then designing a better controller. In this paper, in allusion to serious time-consuming, blindness and other disadvantages of getting the weights by trial and error in the past, through feeding back the unacceptable probability and the cost function value which are got by simulating the system with the fixed parameters, and using the modern optimization algorithm, gradually optimize weights until getting satisfactory results. The simulation and analysis of DC motor speed control system prove this method is effective.

关键词： Weight Cost Function Stochastic Robustness Analysis and Design Direct-current Motor

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IEEE/CAA Journal of Automatica Sinica 2021年第4期8卷 890-904页

作者： Hongbo Zhao Yongming Wen sentang wu Jia Deng Deng are with the Beihang University Beijing 100191China Science and Technology on Information Systems Engineering Laboratory Beijing Institute of Control&Electronics TechnologyBeijing 100038China

Configuration evaluation is a key technology to be considered in the design of multiple aircrafts formation(MAF)configurations with high dynamic properties in engineering applications.This paper deduces the relationship between relative velocity,dynamic safety distance and dynamic adjacent distance of formation members,then divides the formation states into collision-state and matching-state.Meanwhile,probability models are constructed based on the binary normal distribution of relative distance and relative velocity.Moreover,configuration evaluation strategies are studied by quantitatively analyzing the denseness and the basic capabilities according to the MAF collision-state probability and the MAF matching-state probability,respectively.The scale of MAF is grouped into 5 levels,and previous lattice-type structures are extended into four degrees by taking the relative velocities into account to instruct the configuration design under complex task conditions.Finally,hardware-in-loop(HIL)simulation and outfield flight test results are presented to verify the feasibility of these evaluation strategies.

关键词： Collision-state probability dynamic configuration evaluation matching-state probability multiple aircrafts formation

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随机系统的后验椭球条件滤波方法

北京航空航天大学学报 1999年第2期25卷 160-162页

作者：吴森堂北京航空航天大学自动控制系

针对在随机系统中存在着不确知的控制输入，且系统的状态以及随机干扰的分布和参数未知情况下，基于后验椭球逼近的原理，提出了随机系统的后验椭球条件滤波方法，以保证所求解的椭球序列是包含着系统状态估值域的最小椭球序列．该方法... 详细信息

针对在随机系统中存在着不确知的控制输入，且系统的状态以及随机干扰的分布和参数未知情况下，基于后验椭球逼近的原理，提出了随机系统的后验椭球条件滤波方法，以保证所求解的椭球序列是包含着系统状态估值域的最小椭球序列．该方法是当先验统计信息不足时，尤其当系统状态及随机干扰的分布形式未知时，是解决随机系统状态估计的有效途径之一．

关键词：随机系统椭球滤波算法控制输入后验椭球

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飞航导弹编队队形变换控制器设计

北京航空航天大学学报 2014年第2期40卷 240-245页

作者：杜阳吴森堂北京航空航天大学自动化科学与电气工程学院北京100191

为满足飞航导弹编队协同作战中队形变换的需求,针对密集编队在队形变换时的碰撞冲突问题,考虑其低空突防背景与机动能力的限制条件,设计了基于局部模型预测控制的主动防碰撞队形保持控制器,并应用于编队队形的变换控制,提出了队形的状... 详细信息

为满足飞航导弹编队协同作战中队形变换的需求,针对密集编队在队形变换时的碰撞冲突问题,考虑其低空突防背景与机动能力的限制条件,设计了基于局部模型预测控制的主动防碰撞队形保持控制器,并应用于编队队形的变换控制,提出了队形的状态转移变换方法,通过与直接变换方法的对比仿真,验证了其可行性和有效性.

关键词：飞航导弹编队编队控制队形变换模型预测控制

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一种变体飞行器的动力学建模与动态特性分析

北京航空航天大学学报 2015年第1期41卷 58-64页

作者：张杰吴森堂北京航空航天大学自动化科学与电气工程学院北京100191

对可变展长、可变后掠角的变体飞行器物理模型进行了简化,基于Kane方法,将变体运动假设为已知的可控输入,利用约束方程来表示机翼的变形运动,选取飞行器位移运动速度以及角速度在机体坐标系下的6个分量作为广义速率,建立了该变体飞行器... 详细信息

对可变展长、可变后掠角的变体飞行器物理模型进行了简化,基于Kane方法,将变体运动假设为已知的可控输入,利用约束方程来表示机翼的变形运动,选取飞行器位移运动速度以及角速度在机体坐标系下的6个分量作为广义速率,建立了该变体飞行器的六自由度动力学模型.定义了附加力与附加力矩的概念用于描述变体运动对飞行器产生的动力学影响,仿真结果表明,在平稳飞行条件下,相对于变形引起的空气动力的变化,机翼变形产生的附加力和附加力矩都较小.在不同的变形速度下,对变体引起的飞行器纵向运动响应进行了仿真分析,仿真结果表明,变体过程中飞行器的高度、速度以及俯仰角等状态均会发生很大变化.

关键词：变体飞行器动力学模型建模变展长变后掠角 Kane方法

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基于随机鲁棒分析的输出反馈特征结构配置

北京航空航天大学学报 2011年第4期37卷 487-491页

作者：金宪哲吴森堂北京航空航天大学自动化科学与电气工程学院北京100191

针对输出反馈特征结构配置在参数不确定性系统设计中的鲁棒性问题,提出一种基于随机鲁棒分析的输出反馈特征结构配置优化方法.该方法通过随机鲁棒分析准确度量了闭环系统的鲁棒性,确立控制系统设计要求与待设计参数间的直接联系,并运用... 详细信息

针对输出反馈特征结构配置在参数不确定性系统设计中的鲁棒性问题,提出一种基于随机鲁棒分析的输出反馈特征结构配置优化方法.该方法通过随机鲁棒分析准确度量了闭环系统的鲁棒性,确立控制系统设计要求与待设计参数间的直接联系,并运用优化技术实现闭环系统稳定性与性能间的折衷,最大化控制系统的鲁棒性.通过在某高超声速飞行器横侧向解耦控制系统设计上的应用,验证了该方法的有效性.

关键词：特征结构配置随机鲁棒分析鲁棒控制反馈控制

Cobalt doping amount determines dominant reactive species in peroxymonosulfate activation via porous carbon catalysts co-doped by cobalt and nitrogen

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Journal of Environmental Sciences 2024年第4期138卷 212-226页

作者： Xiang Li Limeng wu Aiqin Zhang Shaohua wu Yan Lin Chunping Yang Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China Academy of Environmental and Resource Sciences School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000China College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangsha 410082China

Switching the reaction routes in peroxymonosulfate(PMS)-based advanced oxidation processes have attracted much attention but remain challenging.Herein,a series of Co-N/C catalysts with different compositions and structures were prepared by using bimetallic zeolitic imidazolate frameworks based on ZIF-8 and ZIF-67(x Zn/Co-ZIFs).Results show that Co doping amount could mediate the transformation of the activation pathway of PMS over CoN/C.When Co doping amount was less than 10%,the constructed x Co-N/C/PMS system(x≤10%)was singlet oxygen-dominated reaction;however further increasing Co doping amount would lead to the generation and coexistence of sulfate radicals and high-valent cobalt,besides singlet oxygen.Furthermore,the nitrogen-coordinated Co(Co-NX)sites could serve as main catalytically active sites to generate singlet oxygen.While excess Co doping amount caused the formation of Co nanoparticles from which leached Co ions were responsible for the generation of sulfate radicals and high-valent cobalt.Compared to undoped N/C,Co doping could significantly enhance the catalytic performance.The 0.5%Co-N/C could achieve the optimum degradation(0.488 min^(-1))and mineralization abilities(78.4%)of sulfamethoxazole among the investigated Co-N/C catalysts,which was superior to most of previously reported catalysts.In addition,the application prospects of the two systems in different environmental scenarios(pH,inorganic anions and natural organic matter)were assessed and showed different degradation behaviors.This study provides a strategy to regulate the reactive species in PMS-based advanced oxidation process.

关键词： Peroxymonosulfate Sulfate radical Singlet oxygen Cobalt Zeolitic imidazolate framework Advanced oxidation process

The physiological role of the unfolded protein response in the nervous system

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Neural Regeneration Research 2024年第11期19卷 2411-2420页

作者： Shuangchan wu Wensheng Lin Department of Neuroscience University of MinnesotaMinneapolisMNUSA Institute for Translational Neuroscience University of MinnesotaMinneapolisMNUSA

The unfolded protein response(UPR)is a cellular stress response pathway activated when the endoplasmic reticulum,a crucial organelle for protein folding and modification,encounters an accumulation of unfolded or misfolded proteins.The UPR aims to restore endoplasmic reticulum homeostasis by enhancing protein folding capacity,reducing protein biosynthesis,and promoting protein degradation.It also plays a pivotal role in coordinating signaling cascades to determine cell fate and function in response to endoplasmic reticulum stress.Recent research has highlighted the significance of the UPR not only in maintaining endoplasmic reticulum homeostasis but also in influencing various physiological processes in the nervous system.Here,we provide an overview of recent findings that underscore the UPR’s involvement in preserving the function and viability of neuronal and myelinating cells under physiological conditions,and highlight the critical role of the UPR in brain development,memory storage,retinal cone development,myelination,and maintenance of myelin thickness.

关键词： myelin neuron oligodendrocyte Schwann cell unfolded protein response

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SRAD-QFT鲁棒优化设计新方法

北京航空航天大学学报 2010年第11期36卷 1325-1329页

作者：金宪哲吴森堂北京航空航天大学自动化科学与电气工程学院北京100191

针对使用定量反馈理论进行控制系统设计时存在的鲁棒性度量等问题,结合随机鲁棒分析与设计原理,提出一种鲁棒优化设计新方法.该方法使用被控对象参数的统计信息对参数不确定性进行描述,基于闭环控制系统的蒙特卡罗仿真,将获得的闭环控... 详细信息

针对使用定量反馈理论进行控制系统设计时存在的鲁棒性度量等问题,结合随机鲁棒分析与设计原理,提出一种鲁棒优化设计新方法.该方法使用被控对象参数的统计信息对参数不确定性进行描述,基于闭环控制系统的蒙特卡罗仿真,将获得的闭环控制系统不稳定概率及各项性能指标的不满足概率作为闭环控制系统稳定鲁棒性和性能鲁棒性的度量,并在此基础上实现闭环控制系统的鲁棒优化设计.由某型超声速反舰导弹纵向运动控制系统的设计过程表明:该方法能够准确地描述被控对象的参数不确定性,有效解决控制系统的鲁棒性度量问题,适用于复杂控制系统的设计.

关键词：鲁棒控制定量反馈理论随机鲁棒分析与设计