检索结果-南通市图书馆

Visual Servo Control system for Narrow Butt Seam

在线全文

cnki会议

学校读者我要写书评

暂无评论

Visual Servo Control system for Narrow Butt Seam

第25届中国控制与决策会议

作者： Haiyong chen Fengxiang Lei Guansheng Xing Weipeng Liu hexu Sun School of Control Science and Engineering Hebei University of Technology

ISBN: (纸本)9781467355339

In this paper a visual servo control system is designed to realize the accurate tracking of the narrow butt seam of the thin plate. An effective "and" operation and statics method is proposed to reduce the image noises caused by various disturbances in the welding process. And the ROI of the image is determined to improve the efficiency of the image processing. The feature line of the thinned seam is extracted by using combination of hough transform and least square line fitting technique. Moreover the method used in this study ensured the safety and reliability. In terms of controller, to guarantee the reliability, image error filtering and output pulse verification is added to the controller. Finally, a series of experiments were conducted to verify the good performance of the proposed seam tracking system.

关键词： Servo control Vision control Seam tracking Industrial robot laser welding

Dispatching Algorithm Design for Elevator Group Control System with Q-Learning based on a Recurrent Neural Network

在线全文

cnki会议

学校读者我要写书评

暂无评论

Dispatching Algorithm Design for Elevator Group Control Syst...

第25届中国控制与决策会议

作者： Weipeng Liu Ning Liu hexu Sun Guansheng Xing Yan Dong Haiyong chen School of Control Science and Engineering Hebei University of Technology Education Ministry Engineering Research Center of Intelligent Rehabilitation Equipment and Detection Technology Hebei University of Science and Technology

ISBN: (纸本)9781467355339

A dispatching algorithm of elevator group control system is proposed based on reinforcement learning. Elevator dispatching is modeled by a Markov Decision Process. Then an internally recurrent neural network based reinforcement learning method is designed to find the optimal dispatching policy while the state-action value function is iteratively approximated. Finally, several simulated experiments are done to compare the trained dispatching policy with other traditional ones. The experimental results demonstrate the effectiveness of proposed dispatching method.

关键词： Elevator Group Control Dispatching Algorithm Reinforcement Learning Neural Network

Dehydrogenation Induced Formation of Chiral Core-Shell Arrays of Melamine on Ag(111)

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Physics Letters 2022年第11期39卷 48-52页

作者： hexu Zhang Yuanhao Lyu Wenqi Hu Lan chen Yi-Qi Zhang Kehui Wu Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China

The structural evolution of supramolecular phases of melamine on Ag(111) surface as a function of annealing temperature is investigated by employing low-temper at ure scanning tunneling microscopy/spectroscopy(LTSTM/STS).It is found that partial deprotonation of the melamine molecules leads to formation of distinct types of ordered supramolecular *** from two previously reported phases(α and β),a new phase comprising arrays of close-packed hexagonal core-shell-type clusters is identified for the first *** on high-resolution STM images as well as structural modeling,we show that the new phase presents a two-level hierarchical order and chirality is expressed at both *** STS characterization,we further reveal that the chiral arrangement of the clusters confines surface electrons into a honeycomb pathway with handedness,which could give rise to novel interfacial electronic properties such as Dirac fermions as well as flat band.

关键词： arrangement temper hexagonal

Predictive Image Based Visual Servoing of Manipulators with Multiple Constraints

在线全文

学校读者我要写书评

暂无评论

Predictive Image Based Visual Servoing of Manipulators with ...

第26届中国控制与决策会议

作者： Liu weipeng chen Haiyong Sun hexu Xing Guansheng School of Control Sciences and Control Engineering Hebei University of Technology

ISBN: (纸本)9781479937097

a novel image based visual servoing(IBVS) method under the predictive control frame is proposed in order to solve the visual tracking problem of robot manipulator with multiple constraints. A vision predictive frame is presented by employing the motion model between camera’s velocity and image *** the design step of vision predictive controller is ***, an effective vision predictive control method with a suitable predictive time horizon is obtained. In simulation, the role of predictive time horizon is analyzed and evaluated, and several simulation results are gained by using the proposed method. Finally, the interesting and satisfactory results are illustrated.

关键词： Manipulator Visual Servoing Predictive Control Robot

在线全文

cnki会议

学校读者我要写书评

暂无评论

风电制氢技术现状及发展趋势

电工技术学报 2019年第19期34卷 4071-4083页

作者：孙鹤旭李争陈爱兵张岩梅春晓河北科技大学电气工程学院石家庄050018 河北科技大学化学与制药工程学院石家庄050018 河北建投新能源有限公司石家庄050051

风电制氢技术是提高风能的利用率和缓解弃风问题的有效手段。该文首先针对风电制氢技术的基本原理和技术特征进行简单介绍,然后回顾风电制氢技术的发展历史,详细介绍风电制氢技术在国内外的研究现状,对风电制氢技术优势以及研究成果进... 详细信息

风电制氢技术是提高风能的利用率和缓解弃风问题的有效手段。该文首先针对风电制氢技术的基本原理和技术特征进行简单介绍,然后回顾风电制氢技术的发展历史,详细介绍风电制氢技术在国内外的研究现状,对风电制氢技术优势以及研究成果进行总结。在此基础上对风电制氢系统进行详细的阐述,并且就风电制氢技术的应用前景进行深入的分析和讨论。最后就风电制氢的关键技术以及亟待解决的问题进行全面的综述,从多个角度对风电制氢技术发展进行梳理分析,为今后风电制氢技术的发展提供了借鉴和参考。

关键词：制氢风电技术优势技术现状前景

Entropy Based Indirect Iterative Learning Control for Robot Manipulator with Random Disturbances

在线全文

学校读者我要写书评

暂无评论

Entropy Based Indirect Iterative Learning Control for Robot ...

第三十届中国控制会议

作者： chen Haiyong,WANG Liwei,XING Guansheng,SUN hexu School of Control Sciences and Engineering Hebei University of Technology,Tianj in 300130,P.R.China

A novel entropy based indirect iterative learning control(ILC) methodology for robotic manipulator with random disturbance is developed by combining the minimum error entropy and the optimal strategy,which is used to update local controller parameters between any two adjacent ***,Entropy is a unified probabilistic measure of uncertainty quantification whether the random disturbances are Gaussian or *** innovative performance index that formulates the relation between the entropy of error and controller gains is *** the nonlinear optimal method to obtain new gains is presented,and stability is ***,the effectiveness and feasibility of the proposed control schemes is verified by some simulation results.

关键词： Entropy Control Iterative Learning Control Robot Control

基于Gabor小波和加权马氏距离的带钢表面缺陷检测

在线全文

cnki会议

学校读者我要写书评

暂无评论

电子测量与仪器学报 2016年第5期30卷 786-793页

作者：陈海永徐森刘坤孙鹤旭河北工业大学控制科学与工程学院天津300130 河北科技大学石家庄050000

针对现有带钢表面缺陷检测方法检测率低,难以满足高质量带钢生产的需求。本文融合Gabor小波变换和加权马氏距离阈值化方法,提出了一种新的带钢缺陷检测算法。首先通过实验获取Gabor滤波器一组最优参数,对采集到的样本图像做Gabor模板卷... 详细信息

针对现有带钢表面缺陷检测方法检测率低,难以满足高质量带钢生产的需求。本文融合Gabor小波变换和加权马氏距离阈值化方法,提出了一种新的带钢缺陷检测算法。首先通过实验获取Gabor滤波器一组最优参数,对采集到的样本图像做Gabor模板卷积,得到边缘图像。然后对图像像素点进行加权处理,重新估计马氏距离的协方差矩阵,增大感兴趣区域像素点权重,得到任意灰度值样本与总体样本加权的马氏距离,增强了目标缺陷的边缘特征。最后利用连通区域标记法,搜索并标记带钢缺陷位置,完成了缺陷检测。实验对比表明本文提出的带钢缺陷检测新算法检测率为94.13%,漏检率为4.87%,验证了算法的有效性。

关键词：缺陷检测 Gabor 马氏距离加权连通区域标记

基于相位谱和加权马氏距离的带钢表面缺陷显著性检测

在线全文

学校读者我要写书评

暂无评论

计算机应用 2017年第A1期37卷 190-193,205页

作者：徐森陈海永刘坤孙鹤旭河北工业大学控制科学与工程学院天津300130 河北科技大学石家庄050000

针对带钢表面缺陷检测实时性要求高,易受外界环境、缺陷特征弱等视觉检测难题,提出一种基于相位谱和加权马氏距离的带钢表面缺陷显著性检测方法。首先,对缺陷样本图像进行傅里叶变换,归一化幅值信息,获取只保留相位信息的检测模型。并且... 详细信息

针对带钢表面缺陷检测实时性要求高,易受外界环境、缺陷特征弱等视觉检测难题,提出一种基于相位谱和加权马氏距离的带钢表面缺陷显著性检测方法。首先,对缺陷样本图像进行傅里叶变换,归一化幅值信息,获取只保留相位信息的检测模型。并且,证明了模型的有效性,该模型能够保留包含大量相位信息的不均匀缺陷纹理信号。然后,提出了加权马氏距离方法,对显著图像阈值化分割,完成缺陷检测。实验结果表明,该算法检测速度快,单幅图像平均检测耗时仅15.1 ms,能够满足带钢在线实时检测要求。在同一缺陷数据库完成对比实验,对不同带钢缺陷类型,平均检测率达到了94.7%,且漏检率和误检率较低,验证了算法的有效性。

关键词：带钢缺陷相位谱检测模型理论证明加权马氏距离

在线全文

学校读者我要写书评

暂无评论

点柱分层充填法的点柱间距优化与稳定性分析

矿业研究与开发 2015年第11期35卷 60-63页

作者：任贺旭李占金李群陈申方华北理工大学矿业工程学院河北唐山市063009 河北省矿业开发与安全工程实验室河北唐山市063009

某黑色金属矿山的点柱式上向分层充填法,在开采过程中垂直走向的点柱间顶板经常发生垮塌现象,导致采场无法正常回采,甚至造成永久损失。针对此问题,在原点柱尺寸及沿走向间距布置不变的前提下,利用FLAC3D软件对垂直走向点柱间距不同的3... 详细信息

某黑色金属矿山的点柱式上向分层充填法,在开采过程中垂直走向的点柱间顶板经常发生垮塌现象,导致采场无法正常回采,甚至造成永久损失。针对此问题,在原点柱尺寸及沿走向间距布置不变的前提下,利用FLAC3D软件对垂直走向点柱间距不同的3个方案进行研究,分析了不同间距布置条件下点柱间顶板的应力、应变分布及变化规律,并采用安全系数法为判据分析了顶板的稳定性。结果表明:点柱沿垂直走向间距7m时,顶板安全性好且每个矿块可多回收矿石1.5万t,为最优方案。

关键词：数值模拟点柱式上向分层充填采矿法采场结构参数稳定性分析