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学者姓名:高国华
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摘要 :
A novel compliance modeling method for flexure-hinge-based (FHB) compliant parallel mechanisms is proposed, where internal constraint of branches is taken into consideration based on flexibility-center-decomposition method of compliance matrix and screw theory. The modeling method is employed to transform deformation problem of branches into statics and kinematics problems of pseudo-rigid-body branches. Firstly, the virtual branch is established and its corresponding decoupled compliance matrix is obtained. Then, the compliance modeling of the whole mechanism is obtained by static equilibrium equation and kinematic relations. Secondly, a constraint performance index reflecting ability to constrain undesirable deformation of the compliant parallel mechanism is presented based on the decoupled compliance matrix. The effectiveness of the constraint performance index is verified through analysis of degree of freedom (DoF) of the 3-SS mechanism. Finally, the proposed modeling method and performance index are used in design and analysis of a novel RPR compliant parallel mechanism. To our knowledge, constraint performance index is firstly proposed for assessing the ability to constrain undesirable deformation of the compliant parallel mechanism. (c) 2021 Elsevier Ltd. All rights reserved.
关键词 :
Compliance modeling Compliance modeling Compliant parallel mechanism Compliant parallel mechanism Constraint performance index Constraint performance index Flexibility-center decomposition Flexibility-center decomposition Optimization Optimization
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GB/T 7714 | Zhang, Shuang , Liu, Jingfang , Ding, Huafeng et al. A novel compliance modeling method for compliant parallel mechanisms and its application [J]. | MECHANISM AND MACHINE THEORY , 2021 , 162 . |
MLA | Zhang, Shuang et al. "A novel compliance modeling method for compliant parallel mechanisms and its application" . | MECHANISM AND MACHINE THEORY 162 (2021) . |
APA | Zhang, Shuang , Liu, Jingfang , Ding, Huafeng , Gao, Guohua . A novel compliance modeling method for compliant parallel mechanisms and its application . | MECHANISM AND MACHINE THEORY , 2021 , 162 . |
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摘要 :
This article mainly analyzes the free vibration characteristic of the sandwich piezoelectric beam under elastic boundary conditions and thermal environment. According to the first-order shear deformation theory and Hamilton's principle, the thermo-electro-elastic coupling equations of the sandwich piezoelectric beam are obtained. Meanwhile, elastic boundary conditions composed of an array of springs are introduced, and the displacement variables and external potential energy of the beam are expressed as wave functions. By using the method of reverberation-ray matrix to integrate and solve the governing equations, a search algorithm based on golden-section search is introduced to calculate the required frequency parameters. A series of numerical results are compared with those reported in literature studies and obtained by simulation software to verify the correctness and versatility of the search algorithm. In addition, three parametric research cases are proposed to investigate the frequency parameters of sandwich piezoelectric beams with elastic restraint conditions, material parameters, thickness ratio, different temperature rises, and external electric potential.
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GB/T 7714 | Gao, Guohua , Sun, Ningze , Shao, Dong et al. A Unified Analysis for the Free Vibration of the Sandwich Piezoelectric Laminated Beam with General Boundary Conditions under the Thermal Environment [J]. | SHOCK AND VIBRATION , 2021 , 2021 . |
MLA | Gao, Guohua et al. "A Unified Analysis for the Free Vibration of the Sandwich Piezoelectric Laminated Beam with General Boundary Conditions under the Thermal Environment" . | SHOCK AND VIBRATION 2021 (2021) . |
APA | Gao, Guohua , Sun, Ningze , Shao, Dong , Tao, Yongqiang , Wu, Wei . A Unified Analysis for the Free Vibration of the Sandwich Piezoelectric Laminated Beam with General Boundary Conditions under the Thermal Environment . | SHOCK AND VIBRATION , 2021 , 2021 . |
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摘要 :
Purpose The purpose of this paper is to present a follow-the-leader motion strategy for multi-section continuum robots, which aims to make the robot have the motion ability in a confined environment and avoid a collision. Design/methodology/approach First, the mechanical design of a multi-section continuum robot is introduced and the forward kinematic model is built. After that, the follow-the-leader motion strategy is proposed and the differential evolution (DE) algorithm for calculating optimal posture parameters is presented. Then simulations and experiments are carried out on a series of predefined paths to analyze the performance of the follow-the-leader motion. Findings The follow-the-leader motion can be well performed on the continuum robots this study proposes in this research. The experimental results show that the deviation from the path is less than 9.7% and the tip error is no more than 15.6%. Research limitations/implications Currently, the follow-the-leader motion is affected by the following factors such as gravity and continuum robot design. Furthermore, the position error is not compensated under open-loop control. In future work, this paper will improve the accuracy of the robot and introduce a closed-loop control strategy to improve the motion accuracy. Originality/value The main contribution of this paper is to present an algorithm to generate follow-the-leader motion of the continuum robot based on DE. This method is suitable for solving new arrangements in the process of following a nonlinear path. Then, it is expected to promote the engineering application of the continuum robot.
关键词 :
Continuum robot Continuum robot Differential evolution algorithm Differential evolution algorithm Follow-the-leader Follow-the-leader Motion strategy Motion strategy Multi-section Multi-section
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GB/T 7714 | Gao, GuoHua , Wang, Pengyu , Wang, Hao . Follow-the-leader motion strategy for multi-section continuum robots based on differential evolution algorithm [J]. | INDUSTRIAL ROBOT-THE INTERNATIONAL JOURNAL OF ROBOTICS RESEARCH AND APPLICATION , 2021 , 48 (4) : 589-601 . |
MLA | Gao, GuoHua et al. "Follow-the-leader motion strategy for multi-section continuum robots based on differential evolution algorithm" . | INDUSTRIAL ROBOT-THE INTERNATIONAL JOURNAL OF ROBOTICS RESEARCH AND APPLICATION 48 . 4 (2021) : 589-601 . |
APA | Gao, GuoHua , Wang, Pengyu , Wang, Hao . Follow-the-leader motion strategy for multi-section continuum robots based on differential evolution algorithm . | INDUSTRIAL ROBOT-THE INTERNATIONAL JOURNAL OF ROBOTICS RESEARCH AND APPLICATION , 2021 , 48 (4) , 589-601 . |
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摘要 :
作为轮式拖拉机的重要动力输出机构,动力输出轴能够为各种类型的配套农机具提供动力。针对动力输出轴在旋耕作业中易断裂的问题,对传动系统中影响输出轴受载的因素进行研究。首先对万向节传动结构进行分析,构建万向节Ⅲ轴的工作摆角与动力输出轴的阻力扭矩之间的解析关系,并利用MATLAB进行仿真分析。然后基于TRIZ理论,以减小摆角为目标,应用物—场模型设计出一种新型的旋耕机机构,并利用ADAMS和EDEM进行新机构与原机构的对比仿真试验,结果表明摆角极值由8.42°减小至3.29°,平均值由5.23°减小至1.62°,阻力扭矩放大系数的平均值由0.55减小至0.36,有效地减少动力输出轴上的载荷,提高动力输...
关键词 :
动力输出轴 动力输出轴 TRIZ TRIZ 拖拉机 拖拉机 万向节 万向节 旋耕机 旋耕机
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GB/T 7714 | 高国华 , 田博兴 , 杜云松 et al. 拖拉机动力输出双万向轴分析及优化设计 [J]. | 中国农机化学报 , 2020 , 41 (02) : 100-106 . |
MLA | 高国华 et al. "拖拉机动力输出双万向轴分析及优化设计" . | 中国农机化学报 41 . 02 (2020) : 100-106 . |
APA | 高国华 , 田博兴 , 杜云松 , 张雷雷 , 高鸣 . 拖拉机动力输出双万向轴分析及优化设计 . | 中国农机化学报 , 2020 , 41 (02) , 100-106 . |
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摘要 :
本发明公开了一种吞咽式采摘方法,包括以下步骤:步骤一:靠近物体;步骤二:摘取物体;步骤三:吞咽物体。所述的步骤三是指,摘取物体后通过吞咽的方式将目标物体转移到放置装置里。这种吞咽式采摘机械,包括采摘机械主体、吞咽机构、摘取机构、传动机构及驱动机构。所述采摘机械主体完成靠近物体的动作,所述摘取机构完成摘取物体的动作,所述吞咽结构用于吞咽目标物体,所处驱动机构通过所述传动机构,分别带动主体、吞咽机构和摘取机构产生运动。这种采摘方法省略了传统采摘步骤中将物体放置到收集箱的过程,大大加快了连续采摘的效率。
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GB/T 7714 | 高国华 , 张耀宗 , 王皓 et al. 一种吞咽式采摘方法 : CN202010346095.8[P]. | 2020-04-27 . |
MLA | 高国华 et al. "一种吞咽式采摘方法" : CN202010346095.8. | 2020-04-27 . |
APA | 高国华 , 张耀宗 , 王皓 , 刘聪 , 王鹏宇 , 周梓运 . 一种吞咽式采摘方法 : CN202010346095.8. | 2020-04-27 . |
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摘要 :
基于黄瓜采摘要求设计了一台黄瓜采摘机械臂,通过采用欠驱动机构减少了驱动,降低了机构复杂性。针对欠驱动机构运动不确定性导致该机械臂在工作过程中滑道出现大幅度摆动而降低了机构稳定性的问题,为降低滑道摆动角度峰峰值,借助均匀设计方法完成结构改进模型的Adams仿真试验方案设计,并对不同参数取值下滑道摆动角度峰峰值利用二次多项式回归分析,得出影响滑道摆动角度峰峰值的显著性依次为滑轨倾角、滑轨高度、驱动速度,且滑轨倾角和驱动速度之间存在显著交互作用的结果。最后,利用DPS软件进行变量寻优,得到最优结果为当直线滑台驱动速度为227.25mm/s、滑轨倾角为14.36°、滑轨高度为55.36mm时,滑道摆动...
关键词 :
参数优化 参数优化 均匀试验设计 均匀试验设计 机械臂 机械臂 滑道摆动角度峰峰值 滑道摆动角度峰峰值 黄瓜采摘 黄瓜采摘
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GB/T 7714 | 高国华 , 孙晓娜 , 董增雅 et al. 基于均匀试验设计的黄瓜采摘机械臂参数优化 [J]. | 农机化研究 , 2020 , 42 (03) : 12-20 . |
MLA | 高国华 et al. "基于均匀试验设计的黄瓜采摘机械臂参数优化" . | 农机化研究 42 . 03 (2020) : 12-20 . |
APA | 高国华 , 孙晓娜 , 董增雅 , 马帅 . 基于均匀试验设计的黄瓜采摘机械臂参数优化 . | 农机化研究 , 2020 , 42 (03) , 12-20 . |
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摘要 :
本发明公开了一种具有中空通道的柔性机械臂,涉及机器人领域,这种柔性机械臂包括柔性臂主体、中空通道、传动机构和驱动机构,中空通道在柔性臂主体的内部或者外部,轴线与主体的轴线平行。驱动机构通过驱动传动机构带动主体产生运动,主体产生的运动包括以下至少之一:弯曲、伸缩、扭转。柔性臂中空通道的存在,使柔性臂在运动的同时,允许外部物体在中空通道内运动。本发明给柔性机械臂增加了通道的功能,拓宽了柔性臂的应用范围。
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GB/T 7714 | 高国华 , 张耀宗 , 王皓 et al. 一种具有中空通道的柔性机械臂 : CN202010346115.1[P]. | 2020-04-27 . |
MLA | 高国华 et al. "一种具有中空通道的柔性机械臂" : CN202010346115.1. | 2020-04-27 . |
APA | 高国华 , 张耀宗 , 王皓 , 刘聪 , 王鹏宇 . 一种具有中空通道的柔性机械臂 : CN202010346115.1. | 2020-04-27 . |
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摘要 :
我国是甘薯种植大国,能够进行自动化采收作业的甘薯收获机具备重要地位。甘薯输送分离机构是甘薯收获机中的重要机构,对伤薯率及明薯率有至关重要的影响。通过离散元仿真,从甘薯碰撞损伤和土壤破碎效果两方面进行分析研究,得到最优参数。依此进行样机的设计与制造,并进行田间试验验证仿真结果。依据TRIZ理论,对分级收集机构进行创新设计,解决分级效率差的问题。
关键词 :
TRIZ理论 TRIZ理论 甘薯收获 甘薯收获 离散元仿真 离散元仿真 薯土分离 薯土分离
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GB/T 7714 | 高国华 , 董博 , 杨德秋 et al. 薯土输送分离机构仿真分析与创新设计 [J]. | 农业工程 , 2020 , 10 (11) : 71-78 . |
MLA | 高国华 et al. "薯土输送分离机构仿真分析与创新设计" . | 农业工程 10 . 11 (2020) : 71-78 . |
APA | 高国华 , 董博 , 杨德秋 , 李博文 . 薯土输送分离机构仿真分析与创新设计 . | 农业工程 , 2020 , 10 (11) , 71-78 . |
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摘要 :
针对基质在压模过程中机构与基质之间的相互作用,会出现机构内表面与基质发生粘滞进而导致土块塌陷、土块散落的现象,该文对原压模机构进行创新优化设计,以优化后机构为分析对象,建立基质块成型力的数学模型,得到影响基质块成型的关键因素为内壁倾角、填土量、下压速度。基于EDEM建立符合实际压模过程的仿真模型,设计正交试验,得到压模机构在不同参数作用下基质块的成型质量。经仿真试验结果分析,新方案合理可行并最终确定最优工作参数:填土量155 g,内壁倾角2°,下压速度0.04 m/s。基于最优参数,进一步分析下压件内壁与基质块之间相互作用,得到基质块损伤机理。根据优化的压模机构,设计样机试验,合格率高达96....
关键词 :
EDEM仿真 EDEM仿真 压模机构 压模机构 基质块 基质块 损伤机理 损伤机理 正交试验 正交试验
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GB/T 7714 | 高国华 , 梁永志 , 杜以康 et al. 压模机构优化设计与试验 [J]. | 中国农机化学报 , 2020 , 41 (04) : 43-49 . |
MLA | 高国华 et al. "压模机构优化设计与试验" . | 中国农机化学报 41 . 04 (2020) : 43-49 . |
APA | 高国华 , 梁永志 , 杜以康 , 赵韦东 . 压模机构优化设计与试验 . | 中国农机化学报 , 2020 , 41 (04) , 43-49 . |
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摘要 :
本发明公开了一种软质苗钵分离装置,包括:整体机架、夹持机构、传送机构、撑开机构、顶起机构、传苗筒、苗钵支撑件、固定板,顶起机构安装在固定板上,固定板位于整体机架上;传送机构安装在固定板上,位于顶起机构正上方;夹持机构安装在固定板上,位于传送机构的上方;苗钵撑开机构安装在固定板上,苗钵分离后在传送机构的作用下传送至苗钵撑开机构正下方;该装置工作时(传送)分离夹爪夹紧苗钵,顶起机构气缸升起使苗钵在轴向发生形变,(夹持)分离夹爪夹持苗钵错开位置上升,使最下方苗钵分离并在(传送)分离夹爪的夹持下传送至苗钵分离机构下方,在苗钵分离机构的作用下恢复形变并放至传苗筒中。
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GB/T 7714 | 高国华 , 赵韦东 , 魏兆勇 . 一种软质苗钵分离装置 : CN202011095703.9[P]. | 2020-10-14 . |
MLA | 高国华 et al. "一种软质苗钵分离装置" : CN202011095703.9. | 2020-10-14 . |
APA | 高国华 , 赵韦东 , 魏兆勇 . 一种软质苗钵分离装置 : CN202011095703.9. | 2020-10-14 . |
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