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学者姓名:张丽萍
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In this article, we propose sampling-focused marching tree (SMT) to guarantee optimal solutions in complex environments efficiently. By synergistically integrating heuristic path planning, homotopy space computation, and adaptive sampling exploration, SMT swiftly identifies homotopic solutions to the optimal solution and focuses sampling efforts in their vicinity, continually refining the solution to efficiently attain the global optimum. In the heuristic path planning phase, the generalized Voronoi graph feature nodes are extracted by a filter to facilitate subsequent computations. Next, the feature visibility graph is constructed based on the feature nodes to plan a heuristic path. In the homotopy space computation phase, feature cell decomposition is executed using the feature nodes as well to refine the obstacle-free space. Then, the homotopy space is computed by examining the topological connections between cells and the heuristic path to narrow down the sampling space. In the adaptive sampling exploration phase, the sampling factor is adjusted based on the area of the sampling space to enhance the quality of samples. After adaptive sampling based on the factor, the fast marching tree is leveraged to rapidly explore the samples and find the optimal solution. A thorough analysis of SMT is provided, including completeness, asymptotic optimality, and computational complexity. Comprehensive simulation comparisons with current-leading planning approaches in complex scenarios, along with a series of convincing real-world studies have been conducted to provide evidence for verifying optimality and high-efficiency computation of the proposed SMT.
Keyword :
Convergence Convergence Costs Costs Feature extraction Feature extraction Homotopy-heuristic exploration Homotopy-heuristic exploration Measurement Measurement Mechanical engineering Mechanical engineering Mechatronics Mechatronics mobile robot mobile robot Mobile robots Mobile robots optimality optimality Path planning Path planning Planning Planning Research and development Research and development sampling-based planning sampling-based planning topological refinement topological refinement
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GB/T 7714 | Chen, Yanjie , Jiang, Wensheng , Zhang, Zhixing et al. Sampling-Focused Marching Tree: Optimal Planning Based on Minimized Topological Refinement and Homotopy-Heuristic Exploration [J]. | IEEE-ASME TRANSACTIONS ON MECHATRONICS , 2024 . |
MLA | Chen, Yanjie et al. "Sampling-Focused Marching Tree: Optimal Planning Based on Minimized Topological Refinement and Homotopy-Heuristic Exploration" . | IEEE-ASME TRANSACTIONS ON MECHATRONICS (2024) . |
APA | Chen, Yanjie , Jiang, Wensheng , Zhang, Zhixing , Zhang, Liping , Zhu, Guangyu , Zhang, Hui et al. Sampling-Focused Marching Tree: Optimal Planning Based on Minimized Topological Refinement and Homotopy-Heuristic Exploration . | IEEE-ASME TRANSACTIONS ON MECHATRONICS , 2024 . |
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本发明涉及一种基于工业机器人的平面图案的曲面喷涂方法及系统,该方法包括以下步骤:a、基于边界检测算法和线状要素抽稀算法提取平面图案的边缘轨迹点;b、基于螺旋区域填充算法和涂层沉积速率模型规划区域喷涂轨迹;c、基于STL三角网格完成曲面模型的读取与喷涂轨迹点投影;d、将轨迹点按喷涂高度向曲面法向偏移得到最终的曲面喷涂轨迹并生成相应的机器人运动程序;e、将工件放置在机器人运动空间内,建立相应的工件坐标系,安装机器人末端执行器,建立工具坐标系,在机器人仿真软件中验证轨迹的可行性后,上传生成的机器人控制程序,并完成最终的喷涂任务。该方法及系统有利于提高喷涂的精度、质量和效率,操作便捷、安全。
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GB/T 7714 | 吴海彬 , 周璇 , 张丽萍 . 一种基于工业机器人的平面图案的曲面喷涂方法及系统 : CN202310386258.9[P]. | 2023-04-12 00:00:00 . |
MLA | 吴海彬 et al. "一种基于工业机器人的平面图案的曲面喷涂方法及系统" : CN202310386258.9. | 2023-04-12 00:00:00 . |
APA | 吴海彬 , 周璇 , 张丽萍 . 一种基于工业机器人的平面图案的曲面喷涂方法及系统 : CN202310386258.9. | 2023-04-12 00:00:00 . |
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In many cases, EMI filter plays a key role in EMC design. However, the performance of EMI filters, especially in high frequency, is often different from previous estimates. Based on this situation, this paper first theoretically calculates the performance of EMI filter, and then analyzes the effect of the parasitic parameters of each component of the filter and its near-field coupling on the filter performance. Based on these analyses, high frequency equivalent model of the first-order π filter is completed, which verifies the rationality of the analysis. © 2021 IEEE.
Keyword :
Electromagnetic compatibility Electromagnetic compatibility
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GB/T 7714 | Pan, Jiangnan , Zhang, Liping , Sun, Jiawei . High frequency analysis and modeling of EMI filter [C] . 2021 . |
MLA | Pan, Jiangnan et al. "High frequency analysis and modeling of EMI filter" . (2021) . |
APA | Pan, Jiangnan , Zhang, Liping , Sun, Jiawei . High frequency analysis and modeling of EMI filter . (2021) . |
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针对齿轮故障特征在单一尺度难以全面提取的问题,提出一种基于参数优化的变分模态分解和多尺度排列熵的齿轮故障诊断方法。利用改进的蝙蝠算法对变分模态分解中的参数K和α进行全局寻优,以局部极小包络熵作为适应度值,搜寻K和α的最优组合。经VMD分解得到既定的若干IMF分量,分别计算其相应的多尺度排列熵,构建故障特征向量,输入到极限学习机进行训练和识别,进而实现齿轮的故障诊断。实验表明,该方法具有非常好的分类性能,故障诊断效果显著。
Keyword :
变分模态分解 变分模态分解 多尺度排列熵 多尺度排列熵 改进蝙蝠算法 改进蝙蝠算法 故障诊断 故障诊断 极限学习机 极限学习机
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GB/T 7714 | 谢棕 , 张丽萍 . 基于参数优化VMD和多尺度排列熵的齿轮故障诊断 [J]. | 机械制造与自动化 , 2021 , 50 (06) : 114-117,128 . |
MLA | 谢棕 et al. "基于参数优化VMD和多尺度排列熵的齿轮故障诊断" . | 机械制造与自动化 50 . 06 (2021) : 114-117,128 . |
APA | 谢棕 , 张丽萍 . 基于参数优化VMD和多尺度排列熵的齿轮故障诊断 . | 机械制造与自动化 , 2021 , 50 (06) , 114-117,128 . |
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齿轮状态的监测通常采用有线连接的方式进行,会受到空间的制约。为了提高监测的识别效果,利用LabVIEW编程语言和改进的天牛须算法优化支持向量机的无线齿轮故障监测系统。通过LabVIEW软件及相关硬件无线控制下位机进行齿轮箱振动信号的采集和传输,获取常见的时频及小波能量特征,再利用LabVIEW中MATLAB Script导入改进的天牛须算法优化支持向量机程序进行训练,通过训练好的模型识别不同的齿轮故障类别。整个系统集远程采集、数据库存储、邮件报警、数据处理于一体。实例验证表明,该系统具有良好的识别效果,能满足实际应用。
Keyword :
LabVIEW LabVIEW 改进的天牛须算法 改进的天牛须算法 故障识别 故障识别 齿轮 齿轮
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GB/T 7714 | 钟成豪 , 张丽萍 , 谢棕 . 基于LabVIEW的无线齿轮监测系统设计 [J]. | 机械制造与自动化 , 2020 , 49 (06) : 173-176,185 . |
MLA | 钟成豪 et al. "基于LabVIEW的无线齿轮监测系统设计" . | 机械制造与自动化 49 . 06 (2020) : 173-176,185 . |
APA | 钟成豪 , 张丽萍 , 谢棕 . 基于LabVIEW的无线齿轮监测系统设计 . | 机械制造与自动化 , 2020 , 49 (06) , 173-176,185 . |
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The development of robotic interaction is becoming an increasing topic. The excellent grasp ability of low safety and fragile objects will greatly solve the complex labour of people. Rigid actuation have made significant progress for manufacturing and automation assembly, but it lacks of excellent interaction ability for humans and unstructured environments. Soft manipulator is the basic part of man-machine safety cooperation, which can make up for the deficiency. This paper describes the current research status of soft manipulator, driving methods, structures of soft manipulator and principles. Then, we specially show the joint fluid-elastic pneumatic drive, which enables control bending of different joints of the fingers. A detailed classification and principle description of intelligent materials is made for the flexible hands application. In addition, the principle of two new driving modes: biological driving and gas-liquid driving are presented. The performance of different driving modes is compared in detail, and the advantages and disadvantages of different pneumatic driving modes are listed. Finally, we make some prediction for the application prospect of soft manipulator in the future. The practical application and key problems of soft manipulator are summarised endly.
Keyword :
actuation methods actuation methods driving methods driving methods Fibre-reinforced actuator Fibre-reinforced actuator intelligent materials intelligent materials Soft manipulator Soft manipulator
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GB/T 7714 | Lu Zongxing , Li Wanxin , Zhang Liping . Research development of soft manipulator: A review [J]. | ADVANCES IN MECHANICAL ENGINEERING , 2020 , 12 (8) . |
MLA | Lu Zongxing et al. "Research development of soft manipulator: A review" . | ADVANCES IN MECHANICAL ENGINEERING 12 . 8 (2020) . |
APA | Lu Zongxing , Li Wanxin , Zhang Liping . Research development of soft manipulator: A review . | ADVANCES IN MECHANICAL ENGINEERING , 2020 , 12 (8) . |
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提出一种基于改进粒子群算法和支持向量机的滚动轴承故障诊断方法.首先分析基本粒子群算法的不足及其关键参数,提出多方面改进的粒子群算法,利用10种基准测试函数对比多种粒子群算法,证明该改进算法的优势.然后结合支持向量机,建立滚动轴承故障诊断模型,并提取滚动轴承振动信号的时域、频域、小波包节点能量和CEEMDAN分量排列熵四种特征,构成单一特征和组合特征作为诊断模型的输入特征向量.最后利用凯斯西储大学滚动轴承数据进行验证,并与网格算法、遗传算法和多种不同粒子群算法进行对比.试验证明,本改进粒子群算法优化支持向量机模型在滚动轴承故障诊断中更具优势.
Keyword :
支持向量机 支持向量机 改进粒子群算法 改进粒子群算法 故障诊断 故障诊断 滚动轴承 滚动轴承
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GB/T 7714 | 石志炜 , 张丽萍 , 钟成豪 et al. 改进PSO优化SVM的滚动轴承故障诊断 [J]. | 福州大学学报(自然科学版) , 2020 , 48 (3) : 333-340 . |
MLA | 石志炜 et al. "改进PSO优化SVM的滚动轴承故障诊断" . | 福州大学学报(自然科学版) 48 . 3 (2020) : 333-340 . |
APA | 石志炜 , 张丽萍 , 钟成豪 , 吴宁钰 . 改进PSO优化SVM的滚动轴承故障诊断 . | 福州大学学报(自然科学版) , 2020 , 48 (3) , 333-340 . |
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本发明涉及一种可升降的折叠餐桌及其工作方法,包括桌腿和桌面板,桌腿包括下部桌腿和沿滑动套设在下部桌腿上端的上部桌腿,下部桌腿螺接有竖向设置的升降螺杆,上部桌腿上设置有用以驱动升降螺杆旋转的动力机构A;桌面板包括固联在上部桌腿顶部的固定桌板和设于固定桌板两侧的折叠桌板,折叠桌板包括一级折叠桌板和二级折叠桌板,一级折叠桌板位于固定桌板与二级折叠桌板之间,一级折叠桌板与固定桌板之间通过铰链相铰接,二级折叠桌板与上部桌腿之间设有由动力机构B驱动的折叠伸缩杠杆机构。本发明结构设计合理、操作方便,集折叠与升降于一体,既具有普通伸缩桌的自动伸缩功能,又实现两次桌面的折叠展开,拥有更大的桌面面积。
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GB/T 7714 | 张丽萍 , 何金理 , 罗力维 . 可升降的折叠餐桌及其工作方法 : CN201910524437.8[P]. | 2019/6/18 . |
MLA | 张丽萍 et al. "可升降的折叠餐桌及其工作方法" : CN201910524437.8. | 2019/6/18 . |
APA | 张丽萍 , 何金理 , 罗力维 . 可升降的折叠餐桌及其工作方法 : CN201910524437.8. | 2019/6/18 . |
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本实用新型提出可移动的智能清洁办公桌,所述办公桌的桌面处设有桌面清扫机构;办公桌下部处设有行走装置,所述行走装置旁设有桌下清扫机构;所述桌下清扫机构包括吸尘泵与清洁刷;当进行办公桌清洁时,所述桌面清扫机构对办公桌桌面进行清洁,所述行走装置驱动办公桌在地面移动,使桌下清扫机构对办公桌所在地面进行清扫;本实用新型可自动执行办公桌桌面的清扫,并能通过移动办公桌对办公桌所在地面区域进行清扫。
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GB/T 7714 | 张丽萍 , 张焕彬 , 钟成豪 . 可移动的智能清洁办公桌 : CN201920986980.5[P]. | 2019/6/28 . |
MLA | 张丽萍 et al. "可移动的智能清洁办公桌" : CN201920986980.5. | 2019/6/28 . |
APA | 张丽萍 , 张焕彬 , 钟成豪 . 可移动的智能清洁办公桌 : CN201920986980.5. | 2019/6/28 . |
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本实用新型提出可内外墙面清洁机器人,所述机器人包括控制模块、车体、升降装置和设于升降装置处的清洁装置;所述车体设有第一视觉机构;所述清洁装置处设有第二视觉机构;所述清洁装置包括水泵和一安装有多种清洁用具的旋转台;当进行墙面清洁时,所述机器人沿预设路径行动并以第一视觉机构进行避障,机器人以第二视觉机构对待清洁墙面特征进行分析,并以旋转台把与墙面匹配的清洁用具转至墙壁处进行清洁;本实用新型具有自动行驶功能,而且能识别不同材质的墙面并采用对应的清洁方式。
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GB/T 7714 | 张丽萍 , 梁嘉诚 . 可内外墙面清洁机器人 : CN201921067916.3[P]. | 2019/7/10 . |
MLA | 张丽萍 et al. "可内外墙面清洁机器人" : CN201921067916.3. | 2019/7/10 . |
APA | 张丽萍 , 梁嘉诚 . 可内外墙面清洁机器人 : CN201921067916.3. | 2019/7/10 . |
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