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Snake robot free climbing

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1 Author(s)
Nilsson, M. ; Swedish Inst. of Comput. Sci., Kista, Sweden

Autonomous snake robot locomotion in rough terrain depends on the robot's ability to rise from a horizontal position to a vertical. At first sight, lifting N body segments seems to require O(N) dynamic torque. However, in this paper we describe a practical algorithm, which requires only O(1) dynamic torque. The algorithm is applicable to a wide range of snake robot morphologies. The algorithm requires little space, and control is simple, since motion occurs only in a plane. Analysis of the algorithm reveals a strong relation between the maximum dynamic torque required and the joint pitch range. We discuss some consequences for the design of snake robots. For instance, we show that an adjustment of the mass center of the robot's end segment can reduce the maximum dynamic torque. We study the implications for some snake robot joint designs, including Dragon I, an autonomous snake robot constructed for the study of unconventional locomotion

Published in:

Robotics and Automation, 1997. Proceedings., 1997 IEEE International Conference on  (Volume:4 )

Date of Conference:

20-25 Apr 1997