A body joint improves vertical to horizontal transitions of a wall-climbing robot

Several recently-designed robots are able to scale steep surfaces using animal-inspired strategies for foot attachment and leg kinematics. These designs could be valuable for reaching high vantage points or for overcoming large obstacles. However, most of these robots cannot transition between intersecting surfaces. For example, our previous Climbing Mini-WhegsTM robot cannot make a 90deg transition from a vertical wall up onto a flat horizontal surface. It is known that cockroaches bend their body to accomplish such transitions. This concept has been simplified to a single-axis body joint which allows ground-walking robots to cross uneven terrain. In this work, we examine the effect of a body joint on wall-climbing vehicles using both a kinematic simulation and two prototype Climbing Mini-WhegsTM robots. The simulation accurately predicts that the better design has the body joint axle closer to the center of the robot than to the front wheel- legs for orthogonal exterior transitions for a wide range of initial conditions. In the future, the methods and principles demonstrated here could be used to improve the design of climbing robots for other environments.

[1]  Lin Guo,et al.  A climbing robot with continuous motion , 1994, Proceedings of the 1994 IEEE International Conference on Robotics and Automation.

[2]  Roger D. Quinn,et al.  A small wall-walking robot with compliant, adhesive feet , 2005, 2005 IEEE/RSJ International Conference on Intelligent Robots and Systems.

[3]  Mark A. Minor,et al.  Climbing the walls [robots] , 2002, IEEE Robotics Autom. Mag..

[4]  Roger D. Quinn,et al.  Abstracted biological principles applied with reduced actuation improve mobility of legged vehicles , 2003, Proceedings 2003 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2003) (Cat. No.03CH37453).

[5]  Dick Price.  Climbing the walls , 1995, IEEE Expert.

[6]  Mark R. Cutkosky,et al.  Whole body adhesion: hierarchical, directional and distributed control of adhesive forces for a climbing robot , 2007, Proceedings 2007 IEEE International Conference on Robotics and Automation.

[7]  Daniel E. Koditschek,et al.  Robotics in scansorial environments , 2005, SPIE Defense + Commercial Sensing.

[8]  Daniel E. Koditschek,et al.  RHex: A Simple and Highly Mobile Hexapod Robot , 2001, Int. J. Robotics Res..

[9]  Xu Dianguo,et al.  Development & Application of Wall-Climbing Robots , 1999, ICRA.

[10]  Shigeo Hirose,et al.  Walking and running of the quadruped wall-climbing robot , 1994, Proceedings of the 1994 IEEE International Conference on Robotics and Automation.

[11]  Carlo Menon,et al.  Biologically Inspired Adhesion based Surface Climbing Robots , 2005, Proceedings of the 2005 IEEE International Conference on Robotics and Automation.

[12]  R. Quinn,et al.  Convergent evolution and locomotion through complex terrain by insects, vertebrates and robots. , 2004, Arthropod structure & development.

[13]  Jizhong Xiao,et al.  City Climber: a new generation of mobile robot with wall-climbing capability , 2006, SPIE Defense + Commercial Sensing.

[14]  S. Gorb.  Attachment Devices of Insect Cuticle , 2001, Springer Netherlands.

[15]  Roger D. Quinn,et al.  Mini-Whegs TM Climbs Steep Surfaces Using Insect-inspired Attachment Mechanisms , 2009, Int. J. Robotics Res..

[16]  Sangbae Kim,et al.  SpinybotII: climbing hard walls with compliant microspines , 2005, ICAR '05. Proceedings., 12th International Conference on Advanced Robotics, 2005..