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阿基米德螺线

阿基米德螺线的相关文献在1973年到2022年内共计149篇,主要集中在机械、仪表工业、金属学与金属工艺、数学 等领域,其中期刊论文88篇、会议论文2篇、专利文献1876篇;相关期刊77种,包括东北林业大学学报、组合机床与自动化加工技术、机械等; 相关会议2种,包括2008全国青年摩擦学与表面保护学术会议、辽宁省第二届学术年会暨第五届青年学术年会等;阿基米德螺线的相关文献由289位作者贡献,包括张建辉、孙学成、李志强等。

阿基米德螺线—发文量

期刊论文>

论文:88 占比:4.48%

会议论文>

论文:2 占比:0.10%

专利文献>

论文:1876 占比:95.42%

总计:1966篇

阿基米德螺线—发文趋势图

阿基米德螺线

-研究学者

  • 张建辉
  • 孙学成
  • 李志强
  • 杨春梅
  • 于宏宇
  • 于海龙
  • 于立娟
  • 付玉升
  • 佟岳军
  • 刘向东
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 徐建明; 马益普; 胡松达
    • 摘要: 针对电动汽车充电枪装配问题,提出一种基于速度环的力位混合控制快速寻孔算法。在位置控制空间,考虑到双目视觉系统初始定位不精准,设计了一种基于梯形速度规划的阿基米德螺线轨迹配合向心力引导的寻孔算法。在控制器响应确定的情况下,通过速度规划保证了充电枪与充电枪座之间的接触力恒定和运动稳定性;通过引入充电枪座对充电枪指向装配方向的反作用力即向心力,大幅度提升了寻孔算法的效率。实验结果验证了笔者算法的正确性、有效性。
    • 谢静; 李建瀛; 舒文娟
    • 摘要: 为了拓宽宽带通信天线波纹喇叭馈源的工作频带,设计了一款新型90°波纹喇叭,它的波纹槽以阿基米德螺线的轮廓向外扩展.仿真和测试结果表明:该新型波纹喇叭最优工作带宽可达2∶1,在10~20 GHz的工作频带内,具有稳定的相位中心,其45°面最大交叉极化电平低于?25 dB;在宽频带内波束宽度保持相对恒定,且天线E面和H面辐射方向图的?10 dB波束宽度非常接近.该新型波纹槽可以在宽频带内使得喇叭的辐射方向图更为对称,是改善波纹喇叭性能的新思路.
    • 于海龙
    • 摘要: 通过针对全电玻璃熔炉设计生产的YS型全自动加料机的运行轨迹结合阿基米德螺线的分析,介绍了阿基米德螺线在YS型全自动加料机电气设计中的技术应用。
    • 杨绍忠; 陈培茂
    • 摘要: 针对离心风机蜗壳轮廓线手工焊接劳动强度大、质量不稳定问题,研发一种自动跟踪离心风机蜗壳轮廓线的焊接工作站.通过转盘变位机的旋转实现焊枪相对移动,设计焊缝跟踪器追踪离心风机蜗壳阿基米德螺线,实现一次性焊接成形.基于焊缝跟踪器结构与焊接工艺要求,研发满足阿基米德螺线转速计算方程的稳定焊接速度、实时反馈闭环转速控制等关键技术.该工作站在某厂实际应用,达到提高产品质量和生产效率及扩大产能的效果.
    • 于海龙
    • 摘要: 通过针对全电玻璃熔炉设计生产的YS型全自动加料机的运行轨迹结合阿基米德螺线的分析,介绍了阿基米德螺线在YS型全自动加料机电气设计中的技术应用.
    • 张佳淳; 汪晓勤
    • 摘要: 1引言在几何学中,轨迹是几何图形经历运动与变化生成的新图形,是描述曲线构成规律的抽象概念.在数理逻辑中,轨迹的探求要经历观察、归纳、猜想和逻辑推理,虽没演绎证明那般严谨,但也经历了从前提到结论的过程.因此,轨迹既是静态几何与动态几何之间的桥梁,也是实验几何与论证几何之间的媒介.
    • 刘九庆; 张贺; 马岩; 范芯蕊; 杨春梅; 周玉成
    • 摘要: [目的]为加工出等厚连续的整张竹单板,减小竹材无卡轴旋切机加工竹材选取的局限性,扩大旋切设备的应用范围,提高竹材旋切的整体出材率和成品率,提出一种以"对数螺旋线"为基础的新型旋切曲线数学模型,并计算竹单板的理论出材率,分析讨论所建立模型是否适用于无卡轴竹材旋切机的使用.[方法]对旋切机2种旋切曲线进行数学建模,利用Matlab软件对传统无卡轴旋切理论"阿基米德螺旋线"的数学模型及改进的旋切曲线数学模型(呈椭圆形的"对数螺旋线"旋切曲线)进行仿真分析,建立待加工竹材段的三维模型,结合Matlab仿真结果,对竹材旋切出材率公式进行推导.[结果]通过Matlab仿真结果可知,"阿基米德螺旋线"为圆形螺旋线,由于竹材横截面不规则且近似为椭圆形,壁薄,旋成圆形后,竹材壁厚加工余量小,圆形螺旋线旋切曲线并不完全适用于加工自然生长的竹材,存在加工竹单板易碎、形状不整等缺陷;改进后的"对数螺旋线"旋切曲线呈椭圆形,旋切曲线贴近竹材实际形状,可以保证相邻螺旋线距离误差精确度在许可范围内,模型更加适用于竹单板旋切.数学模型参数可以根据竹材内外径大小实时调整,缩小竹材选取局限性.对推导出的出材率数学模型进行分析,得出竹材的材率η与竹段长度L无关,但应注意长度、壁厚和尖削度的相互影响.[结论]改进后的旋切曲线数学模型以"对数螺旋线"为基础,在旋切竹材时单板厚度误差小,旋切效率更高,具有很高的可靠性和加工精度.在满足加工要求的前提下,为保证竹材出材率、旋切效率、旋切质量等具体要求,加工竹段长度L应在0.8~1 m,竹材壁厚大于10 mm,尖削度小于3~4 mm·m-1.新的旋切模型的建立可提升竹材的整体利用率,拓宽加工范围,为竹材旋切设备设计提供基础理论,对无卡轴竹材旋切加工提出一个新的发展方向.%[Objective] In order to produce the whole bamboo veneer with equal and continuous thickness, reducethe limitation of material selection by bamboo no-card axis rotary cutting machine, expandthe application range of rotary cutting equipment, and improvethe overall turnout percentage and yield rate of bamboo rotary cutting, in this paper, a mathematical model of a new rotary cutting curve based on "logarithmic spiral" is proposed, and the theoretical turnoutrate of bamboo veneer is calculated. The fitness of established model for the use of the no-card axis bamboo rotary cutting machine was also analyzed.[Method] Mathematical model of the two rotary cutting curves were built.Then the mathematical model of the traditional no-card axis rotary cutting theory "Archimedes spiral" and the improved mathematical model of the rotary cutting curve (elliptical "logarithmic spiral" curve) was simulated and analyzed by using Matlab. Finally, the three-dimensional model of the bamboo segment to be processed is established. Combined with the simulation result of Matlab, the formula of the bamboo cutting yield rate is deduced, and the mathematical formula for calculating the yield rate is obtained.[Result] According to the simulation result of Matlab, the "Archimedean spiral" is a circular spiral. Since the cross section of the bamboo is irregular and approximately elliptical, the wall is thin, and after being rounded, the machining margin of the bamboo wall-thickness becomes smaller, the circular spiral curve is not completely suitable for the processing of natural growth bamboo, and defects such as fragile and irregular shape of the processed bamboo veneer occured.The improved "logarithmic spiral"shows the elliptical curve and the cutting curve is similar to the actual shape of the bamboo, which can ensure that the accuracy of the adjacent spiral distance error is within the allowable range, and the model is more suitable for the rotary cutting of the bamboo veneer. The mathematical model parameters can be adjusted in real time according to the size of the inner and outer diameter of the bamboo during processing, which reduces the limitations of bamboo selection.Through the mathematical model analysis of the turnout percentage, it is concluded that the turnout percentage (η) of bamboo is independent of the length (L) of the bamboo segment, and the influence of length, wall thickness and sharpness are analyzed, which can provide reference and theoretical basisfor actual processing and production.[Conclusion] The improved mathematical model of the rotary cutting curve is based on the "logarithmic spiral". When the bamboo is rotated, the thickness error of the veneer is small, the rotary cutting efficiency is high, and the reliability and processing precision are also high. Under the premise of meeting the processing requirements, in order to ensure the bamboo material yield rate, rotary cutting efficiency, rotary cutting quality and other specific requirements, the length of the processed bamboo segment L is required to be about 0.8-1 m. The wall thickness of the bamboo is more than 10 mm, and the sharpness is less than 3-4 mm·m-1. The establishment of the new rotary cutting model has improved the overall utilization rate of bamboo and broadened the processing range. It provides a basic theory for the design of bamboo rotary cutting equipment, and proposes a new development direction for the bamboo cutting processing without card shaft.
    • 牛萌萌; 方会敏; CHANDIO F A; 史嵩; 薛艳芳; 刘虎
    • 摘要: 为解决免耕播种机麦茬地作业的拥堵问题,在拨抛式防堵装置的基础上提出秸秆分拨引导的防堵设计思路,设计了阿基米德螺线型防堵机构.该装置可引导秸秆攀升,实现层叠堆积,缓解秸秆平行拨离苗带时造成的秸秆局部集中,从而实现有效防堵.运用离散元分析软件EDEM 2.7,建立了秸秆-土壤-防堵机构相互作用的仿真模型,分别对单个目标秸秆和秸秆群体进行运动追踪,验证了分拨引导和层叠堆积理念.对试验样机进行了田间性能试验和作业参数优选试验,结果表明:在播种过程中,阿基米德螺线型防堵机构作业顺畅,未发生中、重度堵塞及晾籽;防堵机构最佳工作参数为前进速度7 km/h、转速600 r/min,此时秸秆清除率最高,为92.6%.本文设计的防堵机构性能优于前期课题组设计的防堵机构和某商品化防堵机构.
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