Miniaturized twin-legged robot with an electromagnetic oscillatory actuator
There have been many studies on the moving mechanism of micro robots, such as stick-slip, inchworm like motion, and impact drive. Novel actuators like lead zirconate titanate (PZT), Shape Memory Alloy (SMA), magnetostrictive materials, electromagnetic actuators, electoractive polymers, ultrasonic linear motors, and dielectric elastomers are utilized to realize the moving mechanism. The use of a conventional electromagnetic actuator is unfavorable, because of a few drawbacks, such as generation of stray magnetic fields, hard to miniaturize to the millimeter scale because of 3D integration and a scaling law, and power consumption to maintain a certain position. This research presents a micro robot that uses an electromagnetic actuator customized and developed for micro robot. The electromagnetic actuator is designed from a Brushless Direct Current (BLDC) motor to overcome the drawbacks mentioned above. The developed robot is composed of two electromagnetic actuators. The overall size of the robot is 20 mm × 11 mm × 9 mm (length × height × width) and the weight is 3 g. The developed robot is able to move bidirectionally with a maximum moving speed of 15.76 mm·s−1 (0.79 body-length per second). The optimal conditions of an input signal are calculated theoretically and verified with experiments.
Keywordselectromagnetic actuator oscillatory actuator bionic micro robot stick-slip brushless DC motor
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This work was supported by the 2016 Yeungnam University Research Grant.
- Idogaki T. Experimental wireless micromachine for inspection on inner surface of tubes. Proceedings of 2nd International Micromachine Symposium, Tokyo, Japan, 1996, 95–98.Google Scholar
- Shimoi N, Takita Y, Madokoro H. Development of a wheel robot and micro fling robot using for rescue scenarios. American Journal of Remote Sensing, 2003, 11, 61–66.Google Scholar
- Driesen W. Concept, Modeling and Experimental Characterization of the Modulated Friction Inertial Drive (MFID) Locomotion Principle: Application to Mobile Microrobots. PhD Thesis, EPFL, Lausanne, Switzerland, 2008.Google Scholar
- Eigoli A K, Vossoughi G. Dynamic modeling of stick-slip motion in a legged, piezoelectric driven microrobot. International Journal of Advanced Robotic Systems, 2010, 11, 201–208.Google Scholar
- Driesen W, Rida A, Breguet J M, Clavel R. Friction based locomotion module for mobile MEMS robots. IEEE/RSJ International Conference on Intelligent Robots and Systems, San Diego, USA, 2007, 3815–3820.Google Scholar
- Penella J B. Smart Materials for Micro Robotics Motion Control and Power Harvesting. Universitat de Barcelona, Spain, 2005.Google Scholar
- Qin C J, Ma P S, Yao Q. A prototype micro-wheeled-robot using SMA actuator. Sensors and Actuators A: Physical, 2014, 113, 94–99.Google Scholar
- Lida F, Dravid R, Paul C. Design and control of a pendulum driven hopping robot. Proceedings of IEEE/RSJ International Conference on Intelligent Robots and Systems, Lausanne, Switzerland, 2002, 2141–2146.Google Scholar
- Vartholomeos P, Papadopoulos E. Analysis and design of a novel mini-platform employing vibration micro-motors. Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), Barcelona, Spain, 2005, 3627–3632.Google Scholar
- Vartholomeos P, Papadopoulos E. Analysis, design and control of a planar micro-robot driven by two centripetal- force actuators. Proceedings of IEEE International Conference on ICRA, Orlando, USA, 2006, 649–654.Google Scholar
- Klingner J, Kanakia A, Farrow A, Reishus D, Correll N. A stick-slip omnidirectional powertrain for low-cost swarm robotics: Mechanism, calibration, and control. Proceedings of IEEE/RSJ International Conference on Robotics and Automation (IROS), Chicago, USA, 2014, 846–851.Google Scholar
- Shi L, Guo S, Asaka K. A bio-inspired underwater microrobot with compact structure and multifunctional locomotion. Proceedings of IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM), Budapest, Hungary, 2011, 203–208.Google Scholar
- Lee J, Park W. Robot design for bidirectional locomotion induced by vibration excitation. Proceedings of IEEE International Conference on Robotics and Automation (ICRA), Hong Kong, China, 2014, 5044–5049.Google Scholar
- Becker F, Börner S, Lysenko V, Zeidis I, Zimmermann K. On the mechanics of bristle-bots-modeling, simulation and experiments. Proceedings of 41st International Symposium on Robotics, Munich, Germany, 2014, 1–6.Google Scholar
- Shin B H, Lee S Y. Micro mobile robots using electromagnetic oscillatory actuator. Proceedings of IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics, Rome, Italy, 2012, 575–580.Google Scholar