搜索结果: 1-15 共查到“工学 Kinematic”相关记录22条 . 查询时间(0.093 秒)
OBJECT DEFORMATIONS FROM IMAGE SILHOUETTES USING A KINEMATIC FINITE ELEMENT BEAM MODEL
Photogrammetry silhouette deformations beam finite elements
2016/11/11
In this paper a method is presented which allows the measurement of deflections and torsion by means of the silhouette of an object in images. The method is based on a finite element description of a ...
AN ALGORITHM FOR NETWORK REAL TIME KINEMATIC PROCESSING
RTK VRS GNSS Network RTK Kriging Sagnac Effect
2016/1/15
NRTK1 is an efficient method to achieve precise real time positioning from GNSS measurements. In this paper we attempt to improve NRTK algorithm by introducing a new strategy. In this strategy a preci...
Kinematic GPS for Closed-Loop Control of Farm and Construction Vehicles
Kinematic GPS Closed-Loop Control Farm Construction Vehicles
2015/6/29
Operating heavy equipment can be a difficult and very tedious task; control of an agricultural tractor requires the continuos attention of the driver, and farmers often work long hours during the crit...
A Real-Time Architecture for Kinematic GPS Applied to the Integrity Beacon Landing System
Real-Time Architecture Kinematic GPS Applied Integrity Beacon Landing System
2015/6/29
Recent flight tests of the Integrity Beacon Landing System (IBLS) have demonstrated the feasibility of using GPS for Category III precision landing. To achieve these results, an airborne architecture ...
HIGH PRECISION KINEMATIC POSITIONING USING SINGLE DUAL-FREQUENCY GPS RECEIVER
GPS Precise Point Positioning Precise Orbit and Clock Products
2015/6/1
As a result, it not only
increases the operational costs of equipment and human resources but also significantly increases the logistical complexity for many
applications such as land geodetic sur...
The photogrammetric community is quickly accepting the new developments in GPS/INS integration, and direct georeferencing is becoming a widely applied technique.
However, as this technique has no (or...
Efficient point cloud collision detection and analysis in a tunnel environment using kinematic laser scanning and K-D Tree search
Collision Detection K-D Tree Kinematic Laser Scanning 3D Point Clouds
2014/9/9
Measuring the structure gauge of tunnels and other narrow passages has so far been the only way to evaluate whether large vehicles can pass through them. But especially for very long vehicles like tra...
Fourier Descriptors with Different Shape Signatures: a Comparative Study for Shape Based Retrieval of Kinematic Constraints
Fourier Descriptors Kinematic Constraints Shape Based Retrieval
2011/8/5
Fourier Descriptors (FD) has been widely used in image analysis and computer vision for shape recognition as they can be made independent of translation, rotation, as well as scaling. They have also b...
Kinematic dynamo simulations of von Kármán flows: application to the VKS experiment
application to the VKS experiment von Karman flows
2011/8/31
The VKS experiment has evidenced dynamo action in a highly turbulent liquid sodium von Karman ow [R. Monchaux et al., Phys. Rev. Lett. 98, 044502 (2007)]. However, the existence and the onset of a d...
Homing Strategy for a 4RRR Parallel Kinematic Machine
homing strategy safely homing operation maximum safely homing space
2011/8/4
Returning home is the most important process of a parallel kinematic machine (PKM) with incremental encoders. Currently, most corresponding articles focus on the accuracy of homing process, and there ...
Kinematic Calibration and Forecast Error Compensation of a 2-DOF Planar Parallel Manipulator
parallel manipulator kinematic calibration error compensation minimal linear combinations (MLCs)
2011/8/4
This paper presents a method combined step kinematic calibration and linear forecast real-time error compensation in order to enhance the precision of a two degree-of-freedom (DOF) planar parallel man...
黄瓜采摘机械臂结构优化与运动分析（Optimization Design and Kinematic Analysis of Cucumber-harvesting-robot Manipulator）
黄瓜 采摘机器人 机械臂 参数优化
2010/12/29
黄瓜采摘机器人在非结构环境中工作时，其机械臂的结构特点与运动精度将直接决定机器人作业范围和采摘成功率。针对黄瓜特定的栽培模式，结合机械臂工作空间及结构长度指标，运用参数优化法，对采摘机械臂构型和结构参数进行了优化设计。建立了机械臂运动D-H模型，实现由关节空间向笛卡尔空间的正逆变换，并确定了机械臂速度雅可比矩阵；应用三次多项式插值法，建立了机械臂关节空间运动规划模型；应用Matlab平台对优化参数...
前插式直齿双控制分插机构设计与运动分析(Design and Kinematic Analysis of Double Controlled Forward Transplanting Mechanism with Spur Gears)
高速插秧机 分插机构 运动学分析
2010/12/28
阐述了水稻高速插秧机前插式直齿双控制分插机构设计方法和工作原理，建立了机构的运动学分析模型，使用ADAMS软件对该机构的运动进行了优化和仿真,获得了分插机构的运动轨迹和运动特性曲线。结果表明该机构能够实现插秧时秧爪所需的主要运动学目标。
偏心链轮传动机构的运动学分析及参数优化（Kinematic Analysis and Parameter Optimization of Eccentric Sprockets Transmission Mechanism）
链传动 偏心链轮 运动学分析
2009/12/28
针对偏心链轮传动机构工作过程中链条松紧变化大的问题设计了偏心张紧轮。通过优化张紧轮的转动中心位置、偏心量和初始角位移，使链条在周期中始终处于张紧状态。利用微分对该传动机构进行了运动学分析，列出了主、从链轮角位移关系的求解方程，并以此为基础，进行了传动系统的运动学分析和张紧轮的轮心坐标、初始相位角和偏心量的优化计算，其目标是在周期中使链条松紧波动最小。列出了优化实例，在优化过程中考虑了链节长度的非连...
主动驱动条件下研磨轨迹均匀性的研究（Uniformity of Kinematic Trajectory with Wafer Driving Initiatively in Plane Lapping Process）
平面研磨 主动驱动 均匀性 路径
2010/5/5
分析了主动驱动方式下平面研磨过程中工件的运动学特性，提出了研磨轨迹均匀性可以通过单位面积轨迹点的数量及其标准差来评价，理论分析了研磨盘和工件的转速比和偏心距对轨迹均匀性的影响。仿真表明，偏心距越小越有利于工件表面研磨轨迹的均匀分布，增大偏心距导致相对转速线速度偏差增大，不利于工件表面研磨轨迹的均匀分布。增大转速比使加工轨迹分布稀疏，轨迹曲线点的标准差大，加工均匀性差，研磨盘与工件具有相同的角速度时...