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Impacts of flexible obstructive working environment on dynamic performances of inspection robot for power transmission line 总被引:2,自引:0,他引:2
The rigid-flexible coupling dynamic modeling and simulation of an inspection robot were conducted to study the influences of the flexible obstructive working environment i.e. overhead transmission line on the robot's dynamic performance. First, considering the structure of the obstacles and symmetrical mechanism of the robot prototype, four basic subactions were abstracted to fulfill full-path kinematic tasks. Then, a multi-rigid-body dynamic model of the robot was built with Lagrange equation, whil~e a multi-flexible-body dynamic model of a span of lin~ was obtained by combining finite element method (FEM), modal synthesis method and Lagrange equation. The two subsystem models were coupled under rolling along no-obstacle segment and overcoming obstacle poses, and these simulations of three subactions along different spans of line were performed in ADMAS. The simulation results, including the coupling vibration parameters and driving moment of joint motors, show the dynamic performances of the robot along ftexibile obstructive working path: in flexible obstructive working environment, the robot can fulfill the preset motion goals; it responses slower in more flexible path; the fluctuation of robot as well as driving moment of the corresponding joint in startup and brake region is greater than that in rigid environment; the fluctuation amplitude increases with increasing working environment flexibility. 相似文献
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高压输电线路红外图像的边缘检测 总被引:10,自引:0,他引:10
高压输电线路的导线,金具及绝缘子串等的红外图像的特点有:边缘模糊,对比度差,空间域上存在孤立的点和小块噪声。采用中值滤波方法。在保护图像边缘细节信息的前提下有效地降低了图像空间域高频噪声,用分段线性灰度变换增强了图像边缘的对比度,提高了图像的温度分辨力和空间分辨力。通过对Roberts边缘算子、Sobel边缘算子、Prewit边缘算子、Laplace边缘算子和Laplace改进算子等常用边缘检测算子对噪声的抑制效果和边缘定位精度的对比分析,选用Roberts算子完成了图像的边缘轮廓检测,并对不连续边缘进行跟踪和连接,得到了清晰连续的图像边缘,完成了高压输电线路红外图像的边缘特征提取。以一幅耐张绝缘子串的红外图像为应用实例,验证了图像预处理及边缘检测方法的有效性。 相似文献
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A mobile robot developed by Wuhan University for full-path hotline inspection on 220 kV transmission lines was presented. With 4 rotating joints and 2 translational ones, such robot is capable of traveling along nonobstacle straight-line segment and surmounting straight-line segment obstacles as well as transferring between two spans automatically. Lagrange's equations were utilized to derive dynamic equations of all the links, including items of inertia, coupling inertia, Coriolis acceleration, centripetal acceleration and gravity. And a dynamic response experiment on elemental motions of robot prototype's travelling along non-obstacle straight-line segment and surmounting obstacles was performed on 220 kV 1 : 1 simulative overhanging transmission-line in laboratory. In addition, dynamic numerical simulation was conducted in the corresponding condition. Comparison and analysis on results of experiment and numerical simulation have validated theoretical model and simulation resolution. Therefore, the dynamic model formed hereunder can be used for the study of robot control. 相似文献
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