... ], surveillance [ 3 ], inspection in case of terrorist attacks or in presence of chemical or radioactive pollution [ 4 ], and planetary exploration [ 5 ]. A small-scale robot is less intrusive than a larger one or than a UAS in presence of humans, and can move in narrow spaces, for example, in collapsed buildings...

...Anirban Mazumdar; H. Harry Asada A legged robot that moves across a steel structure is developed for steel bridge inspection. Powerful permanent magnets imbedded in each foot allow the robot to hang from a steel ceiling powerlessly. Although the magnets are passive, the attractive force...