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PRESS-based EFOR algorithm for the dynamic parametrical modeling of nonlinear MDOF systems
Haopeng LIU, Yunpeng ZHU, Zhong LUO, Qingkai HAN
《机械工程前沿(英文)》 2018年 第13卷 第3期 页码 390-400 doi: 10.1007/s11465-017-0459-5
In response to the identification problem concerning multi-degree of freedom (MDOF) nonlinear systems, this study presents the extended forward orthogonal regression (EFOR) based on predicted residual sums of squares (PRESS) to construct a nonlinear dynamic parametrical model. The proposed parametrical model is based on the non-linear autoregressive with exogenous inputs (NARX) model and aims to explicitly reveal the physical design parameters of the system. The PRESS-based EFOR algorithm is proposed to identify such a model for MDOF systems. By using the algorithm, we built a common-structured model based on the fundamental concept of evaluating its generalization capability through cross-validation. The resulting model aims to prevent over-fitting with poor generalization performance caused by the average error reduction ratio (AERR)-based EFOR algorithm. Then, a functional relationship is established between the coefficients of the terms and the design parameters of the unified model. Moreover, a 5-DOF nonlinear system is taken as a case to illustrate the modeling of the proposed algorithm. Finally, a dynamic parametrical model of a cantilever beam is constructed from experimental data. Results indicate that the dynamic parametrical model of nonlinear systems, which depends on the PRESS-based EFOR, can accurately predict the output response, thus providing a theoretical basis for the optimal design of modeling methods for MDOF nonlinear systems.
关键词: MDOF dynamic parametrical model NARX model PRESS-based EFOR cantilever beam
Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear
《机械工程前沿(英文)》 2022年 第17卷 第1期 页码 9-9 doi: 10.1007/s11465-021-0665-z
关键词: gear wear mesh relationship mesh stiffness transmission error vibration characteristics
Special issue: Wind turbine dynamic modeling, condition monitoring and diagnosis
Zheng YOU, Jinji GAO, Fulei CHU, Tielin SHI
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 279-280 doi: 10.1007/s11465-017-0476-4
Dynamic modeling of hydrostatic guideway considering compressibility and inertia effect
Yikang DU,Kuanmin MAO,Yaming ZHU,Fengyun WANG,Xiaobo MAO,Bin LI
《机械工程前沿(英文)》 2015年 第10卷 第1期 页码 78-88 doi: 10.1007/s11465-015-0331-4
Hydrostatic guideways are used as an alternative to contact bearings due to high stiffness and high damping in heavy machine tools. To improve the dynamic characteristic of bearing structure, the dynamic modeling of the hydrostatic guidway should be accurately known. This paper presents a “mass-spring-Maxwell” model considering the effects of inertia, squeeze, compressibility and static bearing. To determine the dynamic model coefficients, numerical simulation of different cases between displacement and dynamic force of oil film are performed with fluent code. Simulation results show that hydrostatic guidway can be taken as a linear system when it is subjected to a small oscillation amplitude. Based on a dynamic model and numerical simulation, every dynamic model’s parameters are calculated by the Levenberg-Marquardt algorithm. Identification results show that “mass-spring-damper” model is the most appropriate dynamic model of the hydrostatic guidway. This paper provides a reference and preparation for the analysis of the dynamic model of the similar hydrostatic bearings.
关键词: hydrostatic guidway dynamic model dynamic mesh technique Levenberg-Marquardt mass-spring-damper model
Bo Chen, Yan Dai, Xuehua Ruan, Yuan Xi, Gaohong He
《化学科学与工程前沿(英文)》 2018年 第12卷 第2期 页码 296-305 doi: 10.1007/s11705-018-1701-3
关键词: membrane vapor separation membrane process modeling process engineering free volume theory volatile organic compound
Finite element modeling of cable sliding and its effect on dynamic response of cable-supported truss
Yujie YU, Zhihua CHEN, Renzhang YAN
《结构与土木工程前沿(英文)》 2019年 第13卷 第5期 页码 1227-1242 doi: 10.1007/s11709-019-0551-5
关键词: sliding cable explicit solution framework original length method seismic response cable rupture
Modeling of dynamic response of poroelastic soil layers under wave loading
Mehmet Bar?? Can üLKER
《结构与土木工程前沿(英文)》 2014年 第8卷 第1期 页码 1-18 doi: 10.1007/s11709-014-0233-2
关键词: dynamic response of soils coupled flow-deformation finite elements analytical solution harmonic waves
《化学科学与工程前沿(英文)》 2022年 第16卷 第7期 页码 1149-1163 doi: 10.1007/s11705-021-2096-0
关键词: carbon dioxide photoreduction computational fluid dynamic simulation kinetic model Langmuir adsorption
Dynamic response surface methodology using Lasso regression for organic pharmaceutical synthesis
《化学科学与工程前沿(英文)》 2022年 第16卷 第2期 页码 221-236 doi: 10.1007/s11705-021-2061-y
关键词: data-driven modeling pharmaceutical organic synthesis Lasso regression dynamic response surface methodology
A total torque index for dynamic performance evaluation of a radial symmetric six-legged robot
Kejia LI, Xilun DING, Marco CECCARELL
《机械工程前沿(英文)》 2012年 第7卷 第2期 页码 219-230 doi: 10.1007/s11465-012-0320-9
This article focuses on the dynamic index and performance of a radial symmetric six-legged robot. At first the structure of the robot is described in brief and its inverse kinematics is presented. Then the dynamic model is formulated as based on the Lagrange equations. A novel index of total torque is proposed by considering the posture of the supporting legs. The new index can be used to optimize the leg’s structure and operation for consuming minimum power and avoiding unstable postures of the robot. A characterization of the proposed six-legged robot is obtained by a parametric analysis of robot performance through simulation using the presented dynamic model. Main influences are outlined as well as the usefulness of the proposed performance index.
Simulate oil spill weathering with system dynamic model
Aihaiti KASIMU, Junran DONG, Yuan BIAN, Desheng WU
《工程管理前沿(英文)》 页码 696-696 doi: 10.1007/s42524-019-0060-1
The computational fluid dynamic modeling of downwash flow field for a six-rotor UAV
Yongjun ZHENG, Shenghui YANG, Xingxing LIU, Jie WANG, Tomas NORTON, Jian CHEN, Yu TAN
《农业科学与工程前沿(英文)》 2018年 第5卷 第2期 页码 159-167 doi: 10.15302/J-FASE-2018216
关键词: CFD simulation downwash flow field numerical analysis plant protection six-rotor UAV
Chengyuan LIANG, Fang YUAN, Xuedong CHEN, Wei JIANG, Lizhan ZENG, Xin LUO
《机械工程前沿(英文)》 2019年 第14卷 第3期 页码 255-272 doi: 10.1007/s11465-019-0538-x
关键词: nano-precision positioning stage analysis and design structural and dynamic parameters dynamic accuracy systematic modeling
Dynamic fate modeling of γ-hexachlorocyclohexane in the lower reaches of the Liao River
LIU Zhenyu, YANG Fenglin, QUAN Xie, ZHANG Xiaohong
《环境科学与工程前沿(英文)》 2007年 第1卷 第2期 页码 166-171 doi: 10.1007/s11783-007-0029-x
关键词: coefficient POPs temperature sediment increase dependent
Dynamic modeling of flexible-links planar parallel robots
DU Zhaocai, YU Yueqing, ZHANG Xuping, DU Zhaocai
《机械工程前沿(英文)》 2008年 第3卷 第2期 页码 232-237 doi: 10.1007/s11465-008-0032-3
标题 作者 时间 类型 操作
PRESS-based EFOR algorithm for the dynamic parametrical modeling of nonlinear MDOF systems
Haopeng LIU, Yunpeng ZHU, Zhong LUO, Qingkai HAN
期刊论文
Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear
期刊论文
Special issue: Wind turbine dynamic modeling, condition monitoring and diagnosis
Zheng YOU, Jinji GAO, Fulei CHU, Tielin SHI
期刊论文
Dynamic modeling of hydrostatic guideway considering compressibility and inertia effect
Yikang DU,Kuanmin MAO,Yaming ZHU,Fengyun WANG,Xiaobo MAO,Bin LI
期刊论文
Integration of molecular dynamic simulation and free volume theory for modeling membrane VOC/gas separation
Bo Chen, Yan Dai, Xuehua Ruan, Yuan Xi, Gaohong He
期刊论文
Finite element modeling of cable sliding and its effect on dynamic response of cable-supported truss
Yujie YU, Zhihua CHEN, Renzhang YAN
期刊论文
Modeling of dynamic response of poroelastic soil layers under wave loading
Mehmet Bar?? Can üLKER
期刊论文
of carbon dioxide photoreduction process in a laboratory-scale photoreactor by computational fluid dynamicand reaction kinetic modeling
期刊论文
Dynamic response surface methodology using Lasso regression for organic pharmaceutical synthesis
期刊论文
A total torque index for dynamic performance evaluation of a radial symmetric six-legged robot
Kejia LI, Xilun DING, Marco CECCARELL
期刊论文
Simulate oil spill weathering with system dynamic model
Aihaiti KASIMU, Junran DONG, Yuan BIAN, Desheng WU
期刊论文
The computational fluid dynamic modeling of downwash flow field for a six-rotor UAV
Yongjun ZHENG, Shenghui YANG, Xingxing LIU, Jie WANG, Tomas NORTON, Jian CHEN, Yu TAN
期刊论文
Comprehensive analysis of the influence of structural and dynamic parameters on the accuracy of nano-precision
Chengyuan LIANG, Fang YUAN, Xuedong CHEN, Wei JIANG, Lizhan ZENG, Xin LUO
期刊论文
Dynamic fate modeling of γ-hexachlorocyclohexane in the lower reaches of the Liao River
LIU Zhenyu, YANG Fenglin, QUAN Xie, ZHANG Xiaohong
期刊论文