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Static balancing of planar articulated robots
Giuseppe QUAGLIA,Zhe YIN
《机械工程前沿(英文)》 2015年 第10卷 第4期 页码 326-343 doi: 10.1007/s11465-015-0355-9
Static balancing for a manipulator’s weight is necessary in terms of energy saving and performance improvement. This paper proposes a method to design balancing devices for articulated robots in industry, based on robotic dynamics. Full design details for the balancing system using springs are presented from two aspects: One is the optimization for the position of the balancing system; the other is the design of the spring parameters. As examples, two feasible balancing devices are proposed, based on different robotic structures: The first solution consists of linkages and springs; the other consists of pulleys, cross mechanisms and (hydro-) pneumatic springs. Then the two solutions are compared. Pneumatic, hydro-pneumatic and mechanical springs are discussed and their parameters are decided according to the requirements of torque compensation. Numerical results show that with the proper design using the methodology presented in this paper, an articulated robot can be statically balanced perfectly in all configurations. This paper therefore provides a design method of the balancing system for other similar structures.
关键词: robotics static balancing pneumatic spring mechanical spring torque compensation
夏敦柱,周百令,王寿荣
《中国工程科学》 2007年 第9卷 第8期 页码 66-68
介绍了在开环工作状态下硅微z轴谐振陀螺仪由于加工工艺缺陷所导致的误差机理。为减小陀螺仪初始电容差和抑制正交耦合误差,提出了一种闭环控制检测策略。重点分析了其力矩反馈器的电刚度效应并给出其线性数学模型表示式。通过对硅微z轴陀螺仪敏感模态的反馈力与谐振频率的关系分析,间接得出了在敏感方向上电负刚度与力矩器所施电压的内在联系,并在实验上进一步验证电刚度效应。这将为下一步闭环控制方案的设计奠定重要基础。
Analysis and characterization of wind-solar-constant torque spring hybridized model
Shantanu ACHARYA,Subhadeep BHATTACHARJEE
《能源前沿(英文)》 2014年 第8卷 第3期 页码 279-289 doi: 10.1007/s11708-014-0312-z
关键词: hybrid vertical axis wind turbine Stirling engine solar-thermal energy wind energy constant torque spring
Back to the spring of Wuhan: facts and hope of COVID-19 outbreak
Guangbiao Zhou, Saijuan Chen, Zhu Chen
《医学前沿(英文)》 2020年 第14卷 第2期 页码 113-116 doi: 10.1007/s11684-020-0758-9
A perspective of “Nuclear Hot Spring” for long-term sustainable economy of the world
Yingzhong LU
《能源前沿(英文)》 2011年 第5卷 第4期 页码 349-357 doi: 10.1007/s11708-011-0168-4
关键词: natural safety reactor full power natural circulation sustainable world economy
Caiyun LIU, Francisco PINTO, C. Mariano COSSANI, Sivakumar SUKUMARAN, Matthew P. REYNOLDS
《农业科学与工程前沿(英文)》 2019年 第6卷 第3期 页码 296-308 doi: 10.15302/J-FASE-2019269
The application of spectral reflectance indices (SRIs) as proxies to screen for yield potential (YP) and heat stress (HS) is emerging in crop breeding programs. Thus, a comparison of SRIs and their associations with grain yield (GY) under YP and HS conditions is important. In this study, we assessed the usefulness of 27 SRIs for indirect selection for agronomic traits by evaluating an elite spring wheat association mapping initiative (WAMI) population comprising 287 elite lines under YP and HS conditions. Genetic and phenotypic analysis identified 11 and 9 SRIs in different developmental stages as efficient indirect selection indices for yield in YP and HS conditions, respectively. We identified enhanced vegetation index (EVI) as the common SRI associated with GY under YP at booting, heading and late heading stages, whereas photochemical reflectance index (PRI) and normalized difference vegetation index (NDVI) were the common SRIs under booting and heading stages in HS. Genome-wide association study (GWAS) using 18704 single nucleotide polymorphisms (SNPs) from Illumina iSelect 90K identified 280 and 43 marker-trait associations for efficient SRIs at different developmental stages under YP and HS, respectively. Common genomic regions for multiple SRIs were identified in 14 regions in 9 chromosomes: 1B (60–62 cM), 3A (15, 85–90, 101–105 cM), 3B (132–134 cM), 4A (47–51 cM), 4B (71–75 cM), 5A (43–49, 56–60, 89–93 cM), 5B (124–125 cM), 6A (80–85 cM), and 6B (57–59, 71 cM). Among them, SNPs in chromosome 5A (89–93 cM) and 6A (80–85 cM) were co-located for yield and yield related traits. Overall, this study highlights the utility of SRIs as proxies for GY under YP and HS. High heritability estimates and identification of marker-trait associations indicate that SRIs are useful tools for understanding the genetic basis of agronomic and physiological traits.
关键词: genome-wide association study (GWAS) heat tolerance spectral reflectance spring wheat
《医学前沿(英文)》 2023年 第17卷 第3期 页码 562-575 doi: 10.1007/s11684-022-0977-3
关键词: SARS-CoV-2 COVID-19 host response bronchoalveolar lavage fluid (BALF)
Shujuan ZHANG,Guoqi SONG,Yulian LI,Jie GAO,Jiao WANG,Guiju CHEN,Haosheng LI,Genying LI,Zhendong ZHAO
《农业科学与工程前沿(英文)》 2014年 第1卷 第1期 页码 37-45 doi: 10.15302/J-FASE-2014008
关键词: common wheat spring radiation frost proteomic analysis 2-DE MALDI-TOF-TOF MS
张义民,贺向东,闻邦椿
《中国工程科学》 2002年 第4卷 第5期 页码 71-74
讨论了螺旋管簧的可靠性优化设计问题。在基本随机变量的概率特性已知的情况下,采用二阶矩法和可靠性优化设计方法对螺旋管簧进行了可靠性优化设计,通过计算机程序可以直接实现螺旋管簧的可靠性优化设计,迅速准确地得到螺旋管簧的可靠性优化设计信息。
张义民,刘巧伶,闻邦椿
《中国工程科学》 2004年 第6卷 第1期 页码 74-80
将可靠性设计理论与灵敏度分析方法相结合,讨论了车辆常用弹簧的可靠性灵敏度设计问题,提出了可靠性灵敏度设计的计算方法,给出了可靠性灵敏度的变化规律,研究了设计参数的改变对车辆常用弹簧可靠性的影响,为车辆常用弹簧的可靠性设计提供了理论依据。
《机械工程前沿(英文)》 2023年 第18卷 第2期 doi: 10.1007/s11465-023-0747-1
关键词: micro-electro-mechanical system capacitive sensor bionics operation instability mechanical and electrical decoupling biomedical force measurement
Analysis of the dynamic hysteresis characteristic of finger seal
LEI Yanni, CHEN Guoding
《机械工程前沿(英文)》 2007年 第2卷 第1期 页码 32-36 doi: 10.1007/s11465-007-0005-y
关键词: FS necessary hysteresis characteristic optimization spring
月球车叶片伸缩式步行轮的力学分析和性能优化 Article
杨璐, 蔡博文, 张荣辉, 李克宁, 张子贤, 雷洁浩, 陈百超, 王荣本
《工程(英文)》 2020年 第6卷 第8期 页码 936-943 doi: 10.1016/j.eng.2020.07.009
在探月工程计划中,月球车的车轮系统是月球车总体设计系统的重要子系统之一。由于月表地形复杂,同时受限于月球车有限的空间,因此大大增加了车轮系统设计和优化工作的难度。本研究的主要目标是针对自主设计的月球车机械结构,建立一个原理型样机以对其性能进行优化。研究的主要工作包括:为应对月表复杂路况,提出了一种适配月球车正反四边形悬架的新型叶片伸缩式步行轮;以功耗最小化为目标,在保证障碍通过性的前提下,分析车轮运动过程中受力情况以实现对车轮的性能优化;最后,基于数字仿真和综合实验方法,验证了新型车轮系统在实际实验中可以达到按需伸缩叶片和节约能耗的效果。本文的研究成果为中国月球车的研究和开发提供了一种技术参考。
Determination of mechanical parameters for elements in meso-mechanical models of concrete
Xianglin GU, Junyu JIA, Zhuolin WANG, Li HONG, Feng LIN
《结构与土木工程前沿(英文)》 2013年 第7卷 第4期 页码 391-401 doi: 10.1007/s11709-013-0225-7
关键词: concrete meso-mechanical model discrete element method size effect mechanical parameter
《化学科学与工程前沿(英文)》 2023年 第17卷 第9期 页码 1254-1266 doi: 10.1007/s11705-023-2297-3
关键词: epoxy resin polyaniline nanorods mechanical property tribological performance wear mechanism
标题 作者 时间 类型 操作
Analysis and characterization of wind-solar-constant torque spring hybridized model
Shantanu ACHARYA,Subhadeep BHATTACHARJEE
期刊论文
Back to the spring of Wuhan: facts and hope of COVID-19 outbreak
Guangbiao Zhou, Saijuan Chen, Zhu Chen
期刊论文
A perspective of “Nuclear Hot Spring” for long-term sustainable economy of the world
Yingzhong LU
期刊论文
Spectral reflectance indices as proxies for yield potential and heat stress tolerance in spring wheat
Caiyun LIU, Francisco PINTO, C. Mariano COSSANI, Sivakumar SUKUMARAN, Matthew P. REYNOLDS
期刊论文
Host protection against Omicron BA.2.2 sublineages by prior vaccination in spring 2022 COVID-19 outbreak
期刊论文
Comparative proteomic analysis of cold responsive proteins in two wheat cultivars with different tolerance to spring
Shujuan ZHANG,Guoqi SONG,Yulian LI,Jie GAO,Jiao WANG,Guiju CHEN,Haosheng LI,Genying LI,Zhendong ZHAO
期刊论文
A bionic approach for the mechanical and electrical decoupling of an MEMS capacitive sensor in ultralow
期刊论文
Determination of mechanical parameters for elements in meso-mechanical models of concrete
Xianglin GU, Junyu JIA, Zhuolin WANG, Li HONG, Feng LIN
期刊论文