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表面组装电路的计算机辅助布图设计
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作者 孙承永 周庆民 《电子元件》 1994年第3期14-18,共5页
关键词 表面组装电路 布图设计 CAD
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Vibration Analysis and Direct Control of XY Table Automated Assembly Machines
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作者 Charfeddine Mrad 《Journal of Mechanics Engineering and Automation》 2013年第1期7-13,共7页
XY table automated assembly machines ensure time saving and quality improving in the electronics industry. Recently, due to the need of higher operation speeds and lighter machines in PCB (Printed Circuit Board) ass... XY table automated assembly machines ensure time saving and quality improving in the electronics industry. Recently, due to the need of higher operation speeds and lighter machines in PCB (Printed Circuit Board) assembly, a challenging problem has arisen which is the table positioning vibration. The high speed with the machine flexibility, make the positioning vibration inevitable although the inner control. The positioning vibration is to be reduced otherwise the machine becomes useless. Firstly, the machine is modeled, the positioning vibration is formulated, and then analyzed. Secondly, using the analysis, three direct control methods are identified to decrease the positioning vibration, they are based on the kinematics, dynamics, and operation of the machine. Thirdly, the methods are examined numerically to evaluate their efficiency. Lastly, the identified methods are discussed to conclude on their application. The results are a real contribution in the vibration control of XY table automated assembly machines, which is classified as industrial knowhow. 展开更多
关键词 Assembly machines XY table positioningvibration vibration analysis direct control.
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浅谈中级维修电工技能鉴定考前培训 被引量:2
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作者 李鹏 《学周刊(上旬)》 2011年第1期185-186,共2页
中级维修电工技能鉴定考前培训,分为以下两个部分:1.理论部分:明确理论鉴定目标,反复做题,克服难点,掌握重点。2.技能部分:人人动手,熟练操作,学生给老师设置故障,老师演示排除。
关键词 维修 技能鉴定 组装电路 排除故障
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