A highly maneuverable robot vehicle for snow travel is required for robot rescue to avalanche. The variably configured segmented wheel (VCSW) seems to be applicable because of its high surmounting capability. Formerly, this VCSW has been developed to traverse rough terrain, muddy roads, water and underwater. VCSW consists of six vanes, a hub, spokes, and a drive wheel. These vanes are pushed and towed by the eccentric hub through spokes periodically based on wheel rotation. Vane movement effectively prevents slippage and sinking in snow. Vane control was located at the wheel center in the original design, so when traversing snow surfaces, scooped-up snow caught between a vane and the vane control mechanism remained stuck in the wheel. The modification we designed for the wheel locates vane control on one side of the wheel to make the wheel center empty so that scooped-up snow is discharged efficiently, as confirmed in experiments.

1. [1] A. Wolf, H. B. Brown et al., “A Mobile Hyper Redundant Mechanism for Search and Rescue Tasks,” Proc. 2003 IEEE/RSJ Int. Conf. on Intelligent Robots and Systems, pp. 2889-2895, 2003.
2. [2] M. Guarnieri, P. Debenest et al., “HELIOS VII: a New Tracked Arm-Equipped Vehicle,” Journal of Robotics and Mechatronics, Vol.15, No.5, pp. 508-515, 2003.
3. [3] K. Suzumori, M. Takata, and S. Wkimoto, “Development of Joints for Power Microrobot for Searching Inside Debris,” Journal of Robotics and Mechatronics, Vol.15, No.5, pp. 555-560, 2003.
4. [4] K. Osuka and H. Kitajima, “Development of Four-Crawler Multilink Mobile Robot MOIRA for Searching Debris,” Journal of Robotics and Mechatronics, Vol.15, No.5, pp. 561-570, 2003.
5. [5] K. Yamanaka, G. Yamamoto et al., “Mechanism of Variable Configuration Rimless Wheel Vehicle,” Proc. of the 2001 JSME Conf. on Robotics and Mechatronics, 1P1-E3 (1)-(2), 2001.
6. [6] T. Iwamoto, Y. Hirose et al., “Propulsion of Revised Design Variable Configuration Rimless Wheel on the water,” Proc. of the 2002 JSME Conf. on Robotics and Mechatronics, 2P2-A06(1)-(2), 2002.
7. [7] N. Miyamoto, K. Endo et al., “Steering/Suspension Mechanism of vehicle Using Variable Configuration Segmented Wheels,” Proc. of the 2003 JSME Conf. on Robotics and Mechatronics, 2A1-2F-B4(1)-(2), 2003.
8. [8] K. Kinutani, K. Endo et al., “Deploy/Retrieval Mechanisms of Variable Configuration Segmented Wheel,” Proc. of the 2003 JSME Conf. on Robotics and Mechatronics, 2A1-2F-B7, (1)-(2), 2003.
9. [9] T. Iwamoto, Y. Fujii, and K. Shibuya, “Steering of 4-Wheel Driven Vehicle with Variable Configuration Segmented Wheels,” Proc. of the 2004 JSME Conf. on Robotics and Mechatronics, 2P2-H-43(1)-(2), 2004.
10. [10] T. Iwamoto and K. Shibuya, “Concept and Mechanism of Robot Vehicle Using Variable Configuration Segmented Wheels,” Transaction of the Japan Society of Mechanical Engineers, C71-701, pp. 171-177, 2005.
11. [11] H. Okada, T. Ishioka et al., “Feasibility Study of Underwater Vehicle with Variable Configuration Segmented Wheels,” Proc. of the 2005 JSME Conf. on Robotics and Mechatronics, 1A1-S-073(1)-(3), 2005.
12. [12] K. Nagai, H.Otaki, and S. Kotosaka, “Study of Actively Transformable Wheel,” The Japan Society of Mechanical Engineers, CiNii, Vol.2002, 604, pp. 183-184, 2002.
13. [13] Y, Kimura, M. Onda, K. Matsuuchi, and S. Hashimoto, “Design and Trial Fabrication of Cycloidal Propeller,” JSME, Proc. of Technology Conf. (Recent Technical Advaces on Elevator and Amusement facilities), No.04-57-105, 2005
14. [14] S. Hashimoto, Y. Kimura, K. Matsuuchi, and M. Onda, “Research on the Characteristic of a Cycloidal Propeller Thruster,” Proc. of the JSME Annual Conf., No.05-1-358, 2005
15. [15] Y. Higashi, K. Tanaka, and H. Ohtake, “Simulation Modeling of a Flying Robot with Variable Attack Angle Mechanism,” Proc. of the 24th Annual Conf. of Robotics Society of Japan, 3F26, 2006
16. [16] N. Hara, K. Tanaka, and H. Ohtake, “Design Parameter Optimization of Flying Robot with Pantograph-based Variable Wing Mechanism through Computer Simulation,“Proc. of the 24th Annual Conf. of Robotics Society of Japan,3A22, 2006
17. [17] S. Hasegawa, K. Tanaka, and H. Ohtake, “Optimization Design of a Multi-Parallel Link Rotor,” Proc. of the 2008 JSME Conf. on Robotics and Mechanics, 1P1-F21, 2008
18. [18] K. Horikawa, T. Kawase, S. Takaoka, H. Tsukamoto, and T. Iwamoto, “On-board Control of Snow Vehicle with VCSWs,” Proc. of the 2008 JSME Conf. on Robotics and Mechatronics, 2P2-A01, 2008
19. [19] K. Horikawa, S. Takaoka, and T. Iwamoto, “Evaluation of Feasibility of Snow Vehicle with VCSWs,” Proc. of 26 RSJ Conf., 2I2-05, 2008.