A new castor wheel mechanism for omni-directional mobile platform is presented. A motion of translation is transformed into a rotation to steer the wheel with the help of a helical path fits into a translation joint a...A new castor wheel mechanism for omni-directional mobile platform is presented. A motion of translation is transformed into a rotation to steer the wheel with the help of a helical path fits into a translation joint and three rollers whose axes are connected to the driving shaft of the wheel. When the path moves in translation it acts on the rollers for steering. The path-roller friction transmission, the wheel kinematics and the maneuverability have been analyzed.展开更多
Power Point已经成为人们工作生活中重要的一部分了,被用得越来越广泛,它在教育行业、企业宣传、工作汇报、婚礼庆典等方面都起着举足轻重的作用。要制作出图、文、声、像具有个性的多媒体演示文稿,这需要一定的操作经验。一、使用动画...Power Point已经成为人们工作生活中重要的一部分了,被用得越来越广泛,它在教育行业、企业宣传、工作汇报、婚礼庆典等方面都起着举足轻重的作用。要制作出图、文、声、像具有个性的多媒体演示文稿,这需要一定的操作经验。一、使用动画特效如果想对多张幻灯片采用动画特效,那么就要从菜单的任务栏中选择＂幻灯片放映＂,你可以看到一些电脑系统默认好的动画特效了。如果勾选＂自动预览＂的选框,展开更多
文摘A new castor wheel mechanism for omni-directional mobile platform is presented. A motion of translation is transformed into a rotation to steer the wheel with the help of a helical path fits into a translation joint and three rollers whose axes are connected to the driving shaft of the wheel. When the path moves in translation it acts on the rollers for steering. The path-roller friction transmission, the wheel kinematics and the maneuverability have been analyzed.
