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立轴式机械底座密封的改进
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作者 骆天与 《润滑与密封》 CAS CSCD 北大核心 1992年第3期55-55,72,共2页
铸造、矿石加工及其它许多立轴类机械,设计时往往疏忽了保证底座可靠密封的重要性,实际使用中底座又是在污物堆积甚至在水和物料混合物的不断冲涮下运转。
关键词 立轴式 机械底座 密封 改进
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Global optimization of manipulator base placement by means of rapidly-exploring random tree
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作者 赵京 Hu Weijian +1 位作者 Shang Hong Du Bin 《High Technology Letters》 EI CAS 2016年第1期24-29,共6页
Due to the interrelationship between the base placement of the manipulator and its operation object,it is significant to analyze the accessibility and workspace of manipulators for the optimization of their base locat... Due to the interrelationship between the base placement of the manipulator and its operation object,it is significant to analyze the accessibility and workspace of manipulators for the optimization of their base location.A new method is presented to optimize the base placement of manipulators through motion planning optimization and location optimization in the feasible area for manipulators.Firstly,research problems and contents are outlined.And then the feasible area for the manipulator base installation is discussed.Next,index depended on the joint movements and used to evaluate the kinematic performance of manipulators is defined.Although the mentioned indices in last section are regarded as the cost function of the latter,rapidly-exploring random tree(RRT) and rapidly-exploring random tree*(RRT*) algorithms are analyzed.And then,the proposed optimization method of manipulator base placement is studied by means of simulation research based on kinematic performance criteria.Finally,the conclusions could be proved effective from the simulation results. 展开更多
关键词 base placement rapidly-exploring random tree (RRT) rapidly-exploring random Tree (RRT*) OPTIMIZATION
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