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Vibration suppression of speed-controlled robots with nonlinear control
Paolo BOSCARIOL,Alessandro GASPARETTO
《机械工程前沿(英文)》 2016年 第11卷 第2期 页码 204-212 doi: 10.1007/s11465-016-0380-3
In this paper, a simple nonlinear control strategy for the simultaneous position tracking and vibration damping of robots is presented. The control is developed for devices actuated by speed-controlled servo drives. The conditions for the asymptotic stability of the closed-loop system are derived by ensuring its passivity. The capability of achieving improved trajectory tracking and vibration suppression is shown through experimental tests conducted on a three-axis Cartesian robot. The control is aimed to be compatible with most industrial applications given the simplicity of implementation, the reduced computational requirements, and the use of joint position as the only measured signal.
关键词: industrial robot nonlinear control vibration damping model-free control motion control
《机械工程前沿(英文)》 2023年 第18卷 第3期 doi: 10.1007/s11465-023-0763-1
关键词: UVSRR system radial electromagnetic type vibration suppression performance simulation engineering application
Identification of cadmium-induced genes in maize seedlings by suppression subtractive hybridization
Quanlin DAI, Baifei HUANG, Zhongyi YANG, Jiangang YUAN, Junzhi YANG
《环境科学与工程前沿(英文)》 2010年 第4卷 第4期 页码 449-458 doi: 10.1007/s11783-010-0250-x
关键词:
Electromagnetic interference modeling and suppression techniques in variable-frequency drive systems
Le YANG, Shuo WANG, Jianghua FENG
《机械工程前沿(英文)》 2018年 第13卷 第3期 页码 329-353 doi: 10.1007/s11465-018-0466-1
Electromagnetic interference (EMI) causes electromechanical damage to the motors and degrades the reliability of variable-frequency drive (VFD) systems. Unlike fundamental frequency components in motor drive systems, high-frequency EMI noise, coupled with the parasitic parameters of the trough system, are difficult to analyze and reduce. In this article, EMI modeling techniques for different function units in a VFD system, including induction motors, motor bearings, and rectifier-inverters, are reviewed and evaluated in terms of applied frequency range, model parameterization, and model accuracy. The EMI models for the motors are categorized based on modeling techniques and model topologies. Motor bearing and shaft models are also reviewed, and techniques that are used to eliminate bearing current are evaluated. Modeling techniques for conventional rectifier-inverter systems are also summarized. EMI noise suppression techniques, including passive filter, Wheatstone bridge balance, active filter, and optimized modulation, are reviewed and compared based on the VFD system models.
关键词: variable-frequency drive (VFD) electromagnetic interference (EMI) motor drive modeling EMI noise suppression
Topology optimization of piezoelectric bi-material actuators with velocity feedback control
Mariana MORETTI, Emílio C. N. SILVA
《机械工程前沿(英文)》 2019年 第14卷 第2期 页码 190-200 doi: 10.1007/s11465-019-0537-y
关键词: topology optimization method bi-material piezoactuator active velocity feedback control time-domain transient analysis host structure design vibration suppression
刘江虹,金翔,廖光煊
《中国工程科学》 2010年 第12卷 第9期 页码 58-62
在研究传统细水雾添加剂的基础上,取长补短,采用物理工艺制备出新型复合添加剂,针对典型火源(酒精池火、煤油池火与木垛火),改变添加剂浓度开展了一系列灭火实验。结果表明:新型复合添加剂显著增强了细水雾的灭火性能,可提高灭火时间5~8倍。随着细水雾中添加剂含量的不断增加,油池火的灭火时间呈现出先快速下降,而后略微增长的趋势;而木垛火的灭火时间表现为平缓下降,并趋于稳定。含新型复合添加剂的细水雾灭火是物理化学复合作用机制,但主导灭火机理是燃料表面的冷却与隔离作用。
A convolutional neural network based approach to sea clutter suppression for small boat detection
Guan-qing Li, Zhi-yong Song, Qiang Fu,liguanqing09@nudt.edu.cn,songzhiyong08@nudt.edu.cn
《信息与电子工程前沿(英文)》 2020年 第21卷 第10期 页码 1413-1534 doi: 10.1631/FITEE.1900523
《机械工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0730-2
关键词: ultrasonic vibration-assisted grinding perforated ultrasonic vibration platform vibration characteristics apparent elasticity method grinding force surface integrity
Haiqiao WEI, Jie YU, Lei ZHOU
《能源前沿(英文)》 2019年 第13卷 第4期 页码 691-706 doi: 10.1007/s11708-019-0621-3
关键词: high compression ratio knock Miller cycle split injection engine performance
Recent development of vibration utilization engineering
WEN Bangchun
《机械工程前沿(英文)》 2008年 第3卷 第1期 页码 1-9 doi: 10.1007/s11465-008-0017-2
关键词: utilization engineering non-linear vibration vibration utillization utillization engineering
Guilian YI, Yunkang SUI, Jiazheng DU
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 229-234 doi: 10.1007/s11465-011-0128-z
To reduce vibration and noise, a damping layer and constraint layer are usually pasted on the inner surface of a gearbox thin shell, and their thicknesses are the main parameters in the vibration and noise reduction design. The normal acceleration of the point on the gearbox surface is the main index that can reflect the vibration and noise of that point, and the normal accelerations of different points can reflect the degree of the vibration and noise of the whole structure. The K-S function is adopted to process many points’ normal accelerations as the comprehensive index of the vibration characteristics of the whole structure, and the vibration acceleration level is adopted to measure the degree of the vibration and noise. Secondary development of the Abaqus preprocess and postprocess on the basis of the Python scripting programming automatically modifies the model parameters, submits the job, and restarts the analysis totally, which avoids the tedious work of returning to the Abaqus/CAE for modifying and resubmitting and improves the speed of the preprocess and postprocess and the computational efficiency.
关键词: Abaqus secondary development Python language vibration and noise reduction K-S function vibration acceleration level
Growth suppression of colorectal cancer expressing S492R EGFR by monoclonal antibody CH12
Qiongna Dong, Bizhi Shi, Min Zhou, Huiping Gao, Xiaoying Luo, Zonghai Li, Hua Jiang
《医学前沿(英文)》 2019年 第13卷 第1期 页码 83-93 doi: 10.1007/s11684-019-0682-z
Colorectal cancer (CRC) is a common malignant tumor in the digestive tract, and 30%–85% of CRCs express epidermal growth factor receptors (EGFRs). Recently, treatments using cetuximab, also named C225, an anti-EGFR monoclonal antibody, for CRC have been demonstrated to cause an S492R mutation in EGFR. However, little is known about the biological function of S492R EGFR. Therefore, we attempted to elucidate its biological function in CRC cells and explore new treatment strategies for this mutant form. Our study indicated that EGFR and S492R EGFR accelerate the growth of CRC cells in vitro and in vivo and monoclonal antibody CH12, which specifically recognizes an EGFR tumor-specific epitope, can bind efficiently to S492R EGFR. Furthermore, mAb CH12 showed significantly stronger growth suppression activities and induced a more potent antibody-dependent cellular cytotoxicity effect on CRC cells bearing S492R EGFR than mAb C225. mAb CH12 obviously suppressed the growth of CRC xenografts with S492R EGFR mutations in vivo. Thus, mAb CH12 may be a promising therapeutic agent in treating patients with CRC bearing an S492R EGFR mutation.
关键词: S492R EGFR ectodomain mutation colorectal cancer mAb CH12 immunnotherapy
Similitude design for the vibration problems of plates and shells: A review
Yunpeng ZHU, You WANG, Zhong LUO, Qingkai HAN, Deyou WANG
《机械工程前沿(英文)》 2017年 第12卷 第2期 页码 253-264 doi: 10.1007/s11465-017-0418-1
Similitude design plays a vital role in the analysis of vibration and shock problems encountered in large engineering equipment. Similitude design, including dimensional analysis and governing equation method, is founded on the dynamic similitude theory. This study reviews the application of similitude design methods in engineering practice and summarizes the major achievements of the dynamic similitude theory in structural vibration and shock problems in different fields, including marine structures, civil engineering structures, and large power equipment. This study also reviews the dynamic similitude design methods for thin-walled and composite material plates and shells, including the most recent work published by the authors. Structure sensitivity analysis is used to evaluate the scaling factors to attain accurate distorted scaling laws. Finally, this study discusses the existing problems and the potential of the dynamic similitude theory for the analysis of vibration and shock problems of structures.
Multi-harmonic forced vibration and resonance of simple beams to moving vehicles
《结构与土木工程前沿(英文)》 页码 981-993 doi: 10.1007/s11709-023-0979-5
关键词: forced vibration linear Euler beam moving load harmonic structure frequency modulation end restraints
Analytical and numerical investigation into the longitudinal vibration of uniform nanotubes
null
《机械工程前沿(英文)》 2014年 第9卷 第2期 页码 142-149 doi: 10.1007/s11465-014-0292-z
In recent years, prediction of the behaviors of micro and nanostructures is going to be a matter of increasing concern considering their developments and uses in various engineering fields. Since carbon nanotubes show the specific properties such as strength and special electrical behaviors, they have become the main subject in nanotechnology researches. On the grounds that the classical continuum theory cannot accurately predict the mechanical behavior of nanostructures, nonlocal elasticity theory is used to model the nanoscaled systems. In this paper, a nonlocal model for nanorods is developed, and it is used to model the carbon nanotubes with the aim of the investigating into their longitudinal vibration. Following the derivation of governing equation of nanorods and estimation of nondimensional frequencies, the effect of nonlocal parameter and the length of the nanotube on the obtained frequencies are studied. Furthermore, differential quadrature method, as a numerical solution technique, is used to study the effect of these parameters on estimated frequencies for both classical and nonlocal theories.
关键词: continuum theory differential quadrature method nanorod longitudinal vibration
标题 作者 时间 类型 操作
Vibration suppression of speed-controlled robots with nonlinear control
Paolo BOSCARIOL,Alessandro GASPARETTO
期刊论文
Radial electromagnetic type unbalance vibration self-recovery regulation system for high-end grinding
期刊论文
Identification of cadmium-induced genes in maize seedlings by suppression subtractive hybridization
Quanlin DAI, Baifei HUANG, Zhongyi YANG, Jiangang YUAN, Junzhi YANG
期刊论文
Electromagnetic interference modeling and suppression techniques in variable-frequency drive systems
Le YANG, Shuo WANG, Jianghua FENG
期刊论文
Topology optimization of piezoelectric bi-material actuators with velocity feedback control
Mariana MORETTI, Emílio C. N. SILVA
期刊论文
A convolutional neural network based approach to sea clutter suppression for small boat detection
Guan-qing Li, Zhi-yong Song, Qiang Fu,liguanqing09@nudt.edu.cn,songzhiyong08@nudt.edu.cn
期刊论文
Vibration characteristics and machining performance of a novel perforated ultrasonic vibration platform
期刊论文
Improvement of engine performance with high compression ratio based on knock suppression using Miller
Haiqiao WEI, Jie YU, Lei ZHOU
期刊论文
Application of python-based Abaqus preprocess and postprocess technique in analysis of gearbox vibration
Guilian YI, Yunkang SUI, Jiazheng DU
期刊论文
Growth suppression of colorectal cancer expressing S492R EGFR by monoclonal antibody CH12
Qiongna Dong, Bizhi Shi, Min Zhou, Huiping Gao, Xiaoying Luo, Zonghai Li, Hua Jiang
期刊论文
Similitude design for the vibration problems of plates and shells: A review
Yunpeng ZHU, You WANG, Zhong LUO, Qingkai HAN, Deyou WANG
期刊论文