A unilateral self-locking mechanism(USM) was proposed to increase the tractive ability of the inchworm in-pipe robots for pipeline inspection.The USM was basically composed of a cam,a torsional spring and an axis.The ...A unilateral self-locking mechanism(USM) was proposed to increase the tractive ability of the inchworm in-pipe robots for pipeline inspection.The USM was basically composed of a cam,a torsional spring and an axis.The self-locking and virtual work principles were applied to studying the basic self-locking condition of the USM.In order to make the cooperation between the crutch and telescopic mechanism more harmonical,the unlocking time of the USM was calculated.A set of parameters were selected to build a virtual model and fabricate a prototype.Both the simulation and performance experiments were carried out in a pipe with a nominal inside diameter of 160 mm.The results show that USM enables the robot to move quickly in one way,and in the other way it helps the robot get self-locking with the pipe wall.The traction of the inchworm robot can rise to 1.2 kN,beyond the limitation of friction of 0.497 kN.展开更多
Good understanding of relationship between parameters of vehicle,terrain and interaction at the interface is required to develop effective navigation and motion control algorithms for autonomous wheeled mobile robots(...Good understanding of relationship between parameters of vehicle,terrain and interaction at the interface is required to develop effective navigation and motion control algorithms for autonomous wheeled mobile robots(AWMR) in rough terrain.A model and analysis of relationship among wheel slippage(S),rotation angle(θ),sinkage(z) and wheel radius(r) are presented.It is found that wheel rotation angle,sinkage and radius have some influence on wheel slippage.A multi-objective optimization problem with slippage as utility function was formulated and solved in MATLAB.The results reveal the optimal values of wheel-terrain parameters required to achieve optimum slippage on dry sandy terrain.A method of slippage estimation for a five-wheeled mobile robot was presented through comparing the odometric measurements of the powered wheels with those of the fifth non-powered wheel.The experimental result shows that this method is feasible and can be used for online slippage estimation in a sandy terrain.展开更多
为了提高牵引变电站绝缘子带电水冲洗作业的安全性,针对110 k V牵引变电站,设计和开发出一种全新的履带式带电水冲洗机器人,能够实现旋转和俯仰以及联合动作。由于工作条件的要求,使用了自制旋转接头来保证机器人的长期可靠工作,并对冲...为了提高牵引变电站绝缘子带电水冲洗作业的安全性,针对110 k V牵引变电站,设计和开发出一种全新的履带式带电水冲洗机器人,能够实现旋转和俯仰以及联合动作。由于工作条件的要求,使用了自制旋转接头来保证机器人的长期可靠工作,并对冲洗效果有重要影响的喷嘴进行了设计和仿真计算。在远程控制下,该水冲洗机器人可以替代人工完成大部分水冲洗作业,从而提高了安全性能、降低了劳动强度。展开更多
基金Project(2007AA04Z256) supported by the National High-Tech Research and Development Program of China
文摘A unilateral self-locking mechanism(USM) was proposed to increase the tractive ability of the inchworm in-pipe robots for pipeline inspection.The USM was basically composed of a cam,a torsional spring and an axis.The self-locking and virtual work principles were applied to studying the basic self-locking condition of the USM.In order to make the cooperation between the crutch and telescopic mechanism more harmonical,the unlocking time of the USM was calculated.A set of parameters were selected to build a virtual model and fabricate a prototype.Both the simulation and performance experiments were carried out in a pipe with a nominal inside diameter of 160 mm.The results show that USM enables the robot to move quickly in one way,and in the other way it helps the robot get self-locking with the pipe wall.The traction of the inchworm robot can rise to 1.2 kN,beyond the limitation of friction of 0.497 kN.
基金Project(60775060) supported by the National Natural Science Foundation of ChinaProject(F200801) supported by the Natural Science Foundation of Heilongjiang Province,China+1 种基金Project(200802171053,20102304110006) supported by the Specialized Research Fund for the Doctoral Program of Higher Education of ChinaProject(2012RFXXG059) supported by Harbin Science and Technology Innovation Talents Special Fund,China
文摘Good understanding of relationship between parameters of vehicle,terrain and interaction at the interface is required to develop effective navigation and motion control algorithms for autonomous wheeled mobile robots(AWMR) in rough terrain.A model and analysis of relationship among wheel slippage(S),rotation angle(θ),sinkage(z) and wheel radius(r) are presented.It is found that wheel rotation angle,sinkage and radius have some influence on wheel slippage.A multi-objective optimization problem with slippage as utility function was formulated and solved in MATLAB.The results reveal the optimal values of wheel-terrain parameters required to achieve optimum slippage on dry sandy terrain.A method of slippage estimation for a five-wheeled mobile robot was presented through comparing the odometric measurements of the powered wheels with those of the fifth non-powered wheel.The experimental result shows that this method is feasible and can be used for online slippage estimation in a sandy terrain.
文摘为了提高牵引变电站绝缘子带电水冲洗作业的安全性,针对110 k V牵引变电站,设计和开发出一种全新的履带式带电水冲洗机器人,能够实现旋转和俯仰以及联合动作。由于工作条件的要求,使用了自制旋转接头来保证机器人的长期可靠工作,并对冲洗效果有重要影响的喷嘴进行了设计和仿真计算。在远程控制下,该水冲洗机器人可以替代人工完成大部分水冲洗作业,从而提高了安全性能、降低了劳动强度。
