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Model reduction of contact dynamics simulation using a modified Lyapunov balancing method
Jianxun LIANG, Ou MA, Caishan LIU
《机械工程前沿(英文)》 2011年 第6卷 第4期 页码 383-391 doi: 10.1007/s11465-011-0244-9
Finite element models are often used to simulate impact and contact dynamics responses of multibody dynamical systems. However, such a simulation remains very inefficient because very small integration time step must be used when solving the involved differential equations, especially when the involved contact stiffness is high. Although many model reduction techniques have been available to improve the efficiency of finite element based simulations, these techniques cannot be readily applied to contact dynamics simulations due to the high nonlinearity of the contact dynamics models. This paper presents a model reduction approach for finite-element based multibody contact dynamics simulation, based on a modified Lyapunov balanced truncation method. An example is presented to demonstrate that, by applying the model reduction the simulation process is significantly speeded up and the resulting error is bounded within an acceptable level. The performance of the method with respect to some influential factors such as element size, shape and contact stiffness is also investigated.
关键词: contact dynamics dynamic simulation model reduction finite element method
Selective reduction of NO by photo-SCR with ammonia in an annular fixed-film photoreactor
YiangChen CHOU, Young KU
《环境科学与工程前沿(英文)》 2012年 第6卷 第2期 页码 149-155 doi: 10.1007/s11783-010-0296-9
关键词: photo-SCR photocatalysis NO reduction Eley-Rideal model
Model reduction techniques for dynamics analysis of ultra-precision linear stage
Xuedong CHEN, Zhixin LI
《机械工程前沿(英文)》 2009年 第4卷 第1期 页码 64-70 doi: 10.1007/s11465-009-0009-x
《化学科学与工程前沿(英文)》 2022年 第16卷 第12期 页码 1726-1734 doi: 10.1007/s11705-022-2188-5
关键词: chemical looping reforming SrFeO3−δ/CaO·MnO nanocomposite reduction kinetics Avrami–Erofeyev model pressure-dependent term
Iraj AHMADIAN,Oveis ABEDINIA,Noradin GHADIMI
《能源前沿(英文)》 2014年 第8卷 第4期 页码 412-425 doi: 10.1007/s11708-014-0315-9
关键词: component distributed energy resources fuzzy optimization loss reduction interactive honey bee mating optimization (IHBMO) voltage deviation reduction stochastic programming
多目标自适应优化模型预测控制——降低氧化锌回转窑的碳排放 Article
Ke Wei, Keke Huang, Chunhua Yang, Weihua Gui
《工程(英文)》 2023年 第27卷 第8期 页码 96-105 doi: 10.1016/j.eng.2023.01.017
The zinc oxide rotary kiln, as an essential piece of equipment in the zinc smelting industrial process, is presenting new challenges in process control. China's strategy of achieving a carbon peak and carbon neutrality is putting new demands on the industry, including green production and the use of fewer resources; thus, traditional stability control is no longer suitable for multi-objective control tasks. Although researchers have revealed the principle of the rotary kiln and set up computational fluid dynamics (CFD) simulation models to study its dynamics, these models cannot be directly applied to process control due to their high computational complexity. To address these issues, this paper proposes a multi-objective adaptive optimization model predictive control (MAO-MPC) method based on sparse identification. More specifically, with a large amount of data collected from a CFD model, a sparse regression problem is first formulated and solved to obtain a reduction model. Then, a two-layered control framework including real-time optimization (RTO) and model predictive control (MPC) is designed. In the RTO layer, an optimization problem with the goal of achieving optimal operation performance and the lowest possible resource consumption is set up. By solving the optimization problem in real time, a suitable setting value is sent to the MPC layer to ensure that the zinc oxide rotary kiln always functions in an optimal state. Our experiments show the strength and reliability of the proposed method, which reduces the usage of coal while maintaining high profits.
关键词: Zinc oxide rotary kiln Model reduction Sparse identification Real-time optimization Model predictive control Process control
Does environmental infrastructure investment contribute to emissions reduction? A case of China
Xiaoqian SONG, Yong GENG, Ke LI, Xi ZHANG, Fei WU, Hengyu PAN, Yiqing ZHANG
《能源前沿(英文)》 2020年 第14卷 第1期 页码 57-70 doi: 10.1007/s11708-019-0654-7
关键词: environmental infrastructure investment (EII) CO2 emission SO2 emission PM2.5 pollution stochastic impact by regression on population affluence and technology (STIRPAT) model governance
Electrocatalytic reduction of NO to NH in ionic liquids by P-doped TiO nanotubes
《化学科学与工程前沿(英文)》 2023年 第17卷 第6期 页码 726-734 doi: 10.1007/s11705-022-2274-8
关键词: nitric oxide reduction reaction electrcatalysis ammonia production phosphorus-doped titania
《环境科学与工程前沿(英文)》 2023年 第17卷 第9期 doi: 10.1007/s11783-023-1715-z
● N2H4 addition enhanced and recovered anammox performance under Cr(VI) stress.
关键词: Extracellular Cr(VI) reduction Electron transfer Anammox Hydrazine Cr(VI) inhibition
Achieving air pollutant emission reduction targets with minimum abatement costs: An enterprise-level
《环境科学与工程前沿(英文)》 2022年 第16卷 第2期 doi: 10.1007/s11783-021-1459-6
• Quantification of efficiency and fairness of abatement allocation are optimized.
关键词: Pollutant emission reduction allocation Emission reduction measures Total abatement cost Economic efficiency Abatement space
Recent advances and challenges of nitrogen/nitrate electro catalytic reduction to ammonia synthesis
《能源前沿(英文)》 doi: 10.1007/s11708-023-0908-2
关键词: electrochemical ammonia synthesis nitrogen nitrate nitrogen reduction reaction (NRR) to ammonia nitrate reduction reaction (NO–3 RR)
Strength reduction factors for structural rubbercrete
Bashar S. MOHAMMED,N. J. AZMI
《结构与土木工程前沿(英文)》 2014年 第8卷 第3期 页码 270-281 doi: 10.1007/s11709-014-0265-7
关键词: crumb rubber recycled tire mix design reduction factor strength modulus elasticity
A review of Pt-based electrocatalysts for oxygen reduction reaction
Changlin ZHANG, Xiaochen SHEN, Yanbo PAN, Zhenmeng PENG
《能源前沿(英文)》 2017年 第11卷 第3期 页码 268-285 doi: 10.1007/s11708-017-0466-6
关键词: oxygen reduction reaction (ORR) electrocatalysis platinum catalyst activity durability
Elena Yu. KONYSHEVA
《化学科学与工程前沿(英文)》 2013年 第7卷 第3期 页码 249-261 doi: 10.1007/s11705-013-1333-6
关键词: reduction of cerium oxide composites perovskites catalyst under hydrogen containing atmosphere
Scale up of reactors for carbon dioxide reduction
《化学科学与工程前沿(英文)》 2023年 第17卷 第1期 页码 116-122 doi: 10.1007/s11705-022-2178-7
关键词: CO2 reduction electrochemical cell electrosynthesis upscaling
标题 作者 时间 类型 操作
Model reduction of contact dynamics simulation using a modified Lyapunov balancing method
Jianxun LIANG, Ou MA, Caishan LIU
期刊论文
Selective reduction of NO by photo-SCR with ammonia in an annular fixed-film photoreactor
YiangChen CHOU, Young KU
期刊论文
Model reduction techniques for dynamics analysis of ultra-precision linear stage
Xuedong CHEN, Zhixin LI
期刊论文
Reduction kinetics of SrFeO/CaO∙MnO nanocomposite as effective oxygen carrier for chemical looping partial
期刊论文
Fuzzy stochastic long-term model with consideration of uncertainties for deployment of distributed energy
Iraj AHMADIAN,Oveis ABEDINIA,Noradin GHADIMI
期刊论文
Does environmental infrastructure investment contribute to emissions reduction? A case of China
Xiaoqian SONG, Yong GENG, Ke LI, Xi ZHANG, Fei WU, Hengyu PAN, Yiqing ZHANG
期刊论文
Enhancement of extracellular Cr(VI) reduction for anammox recovery using hydrazine: performance, pathways
期刊论文
Achieving air pollutant emission reduction targets with minimum abatement costs: An enterprise-level
期刊论文
Recent advances and challenges of nitrogen/nitrate electro catalytic reduction to ammonia synthesis
期刊论文
A review of Pt-based electrocatalysts for oxygen reduction reaction
Changlin ZHANG, Xiaochen SHEN, Yanbo PAN, Zhenmeng PENG
期刊论文