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Lae-hyung Ryu Tae-wan Kim Min-jae Oh Nam-kug Ku Kyu-yeul Lee 《Journal of Marine Science and Technology》2009,14(3):345-358
We propose a method to determine the optimal initial location and to generate torch paths for a ship welding robot with 6
degrees of freedom (DOF). The optimal initial location is determined using an objective function, which is set up by combining
constraints on the torch posture, manipulability, and the range of each joint angle to avoid collisions. A genetic algorithm
(GA) is used to optimize the objective function because it does not require additional derivatives. After the initial location
is determined, torch paths are generated by interpolating the starting point, endpoints and torch postures using inverse kinematics.
Our method can be applied to automate the welding job for each block during ship building, irrespective of the shape of the
robots, by changing the objective function. 相似文献
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某船边舵柄设计时所取的舵杆与拉杆轴线距离不足造成舵柄与拉杆之间产生干涉现象,为此在舵柄上切削出一个平面,为了保证该哈夫边舵柄在设计载荷作用下有足够的强度,采用有限元方法对其结构强度进行直接计算和校核。 相似文献
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Namkug Ku Ju-hwan Cha Kyu-Yeul Lee Jongwon Kim Tae-wan Kim Sol Ha Donghun Lee 《Journal of Marine Science and Technology》2010,15(4):374-385
This paper describes the development of a self-driving mobile welding robot. The robot is used to weld U-shaped welding areas
in enclosed double-hull structures. In order to place itself inside the double-hull structure, the robot is capable of passing
through an access hole 600 mm wide and 800 mm high. This research addresses the mechanical and control systems of the robot.
The mechanical system of the robot consists of an eight-axis mobile platform, and a six-axis welding unit. The control system
consists of a main controller, a welding machine controller (arc sensor board), and seam tracking sensors, i.e., a touch sensor,
a laser sensor, and an arc sensor. To reduce the number of cables that would be dragged by the welding robot, the main controller
is designed as an embedded type that is mounted on the back of the mobile platform. 相似文献
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Edward C. S. Ku 《运输规划与技术》2020,43(7):651-669
ABSTRACT Mobile commerce (m-commerce) faces a growing array of client devices for which applications are designed. Applications developed for general consumer use must be compatible with a wide range of devices. This research investigates how perceived usefulness and enjoyment affect intention to use a mobile application service (T-Express). In this study, we formulate a commitment model from the perspective of the social identity and technology acceptance perspective. Empirical data were collected by conducting a field survey of users of T-Express from Taiwan High Speed Rail Corporation (THSRC) stations in Taiwan. The main findings of the study are that wireless technology provides great value to businesses when it allows consumers to access real-time data to make timely decisions that either decrease costs or increase revenues; and to achieve a higher intention to use mobile applications, there should be a clear communication process between mobile application and passenger. Our findings indicate that one of the more overt illustrations of the power of packaging symbolism involves package design strategies that serve to provide a radical new upscale positioning for the THSRC brand. 相似文献
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