Design and Fabrication of a Miniature Railway Vehicle

We present design, fabrication, and characterization of a small (12 mm × 12 mm × 8 mm) movable railway vehicle for sensor carrying. The miniature railway vehicle (MRV) was mainly composed of a vibrational structure and three legs. A railway was designed and fabricated to power and guide the MRV. It also transmits the sensed data from the MRV to the signal processing unit. The MRV with legs on the railway was moving due to its high-frequency vibration. A model was derived to describe the motion. Besides, FEM simulations were performed to design the legs. Then, the MRV and the railway were fabricated by precision machining. Finally, an infrared sensor was carried and tested. The result shows that the MRV without loading was moving along the railway and its maximum speed was 12.2 mm/s. Moreover, the testing signal was sensed by the MRV.

Authors:

• Max Ti-Kuang Hou
• Hui-Mei Shen
• Chiang-Ni Lu
• I-Jen Hsu

Keywords:

• Locomotion
• Micro-Robot
• Miniature Railway Vehicle
• Stick-Slip.

References:

[1] J. Okamoto, Jr., J. C. Adamowski, M. S. G. Tsuzuki, F. Buiochi, and C. S.
Camerini, "Autonomous system for oil pipelines inspection,"
Mechatronics, vol. 9, pp. 731-743, 1999.
[2] K. Suzumori, T. Miyagawa, M. Kimura, and Y. Hasegawa, "Micro
inspection robot for 1-in pipes," IEEE/ASME Trans. Mechatronics, vol. 4,
pp. 286-292, Sep. 1999.
[3] H. T. Roman, B. A. Pellegrino, and W. R. Sigrist, "Pipe crawling
inspection robots: An overview," IEEE Trans. Energy Convers., vol. 8,
pp. 576-583, Sep. 1993.
[4] W. Neubauer, "A spider-like robot that climbs vertically in ducts or
pipes," in Proc. IEEE/RSJ Int. Conf. Intelligent Robots, Systems, pp.
1178-1185, 1994.
[5] Y. P. Lee, B. Kim, M. G. Lee, and J.-O Park, "Locomotive Mechanism
Design and Fabrication of Biomimetic Micro Robot Using Shape Memory
Alloy," in Proceedings of the 2004 IEEE International Conference on
Robotics &Automation, pp. 5007-5012, Apr. 2004.
[6] J. Yuh, "Design and Control of Autonomous Underwater Robots: A
Survey," Autonomous Robots, vol. 8, pp. 7-24, 2000.
[7] B. R. Donald, C. G. Levey, C. D. McGray, I. Paprotny, and D. Rus, "An
Untethered, Electrostatic, Globally Controllable MEMS Micro-Robot,"
Journal of Microelectromechanical Systems, vol. 15, pp. 1-15, Feb. 2006.
[8] K. Vollmers, D. R. Frutiger, B. E. Kratochvil, and B. J. Nelson, "Wireless
resonant magnetic microactuator for untethered mobile microrobots,"
Applied Physics Letters, vol. 92, pp. 144103-1-3, 2008.
[9] U. Simu, and S. Johansson, "Analysis of quasi-static and dynamic motion
mechanisms for piezoelectric miniature robots," Sensors and Actuators: A,
vol. 132, pp. 632-642, 2006.
[10] Q. Chang-jun, M. Pei-sun, and Y. Qin, "A prototype micro-wheeled-robot
using SMA actuator," Sensors and Actuators: A, vol. 113, pp. 94-99,
2004.
[11] J.-M. Breguet, S. Johansson, W. Driesen, and U. Simu, "A review on
actuation principles for few cubic millimeter sized mobile micro-robots",
in 10th International Conference on New Actuators (Actuator 2006), pp.
374-381, 2006.
[12] J.-M. Breguet, and R. Clavel, "Stick and Slip Actuators: design, control,
performances and applications," in 1998 International Symposium on
Micromechatronics and Human Science, pp. 89-95, 1998.