Compliant Walking Control for Hydraulic Driven Hexapod Robot on Rough Terrain
Addie Irawan* and Kenzo Nonami**
*Graduate School of Engineering, Division of Artificial Systems Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan
**Department of Mechanical Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan
This article describes the proposed force-based walking method for hydraulically driven hexapod robot named COMET-IV, to walk on the large scale rough terrain. The trajectory is designed where foot step motion for each leg is decided by vertical force on the foot that is calculated from cylinder torque of thigh and shank. This proposed walking trajectory is established with compliant control strategy, which consists of force control based on position range from the trajectory motion signal. This force controller is dynamically control ON/OFF by proposed decision algorithms that derived from the changes of kinematic motion of the trajectory itself. In addition logical attitude (body) control is designed as a part of the decision control module that makes a pre-calculation of decision making based on leg sequence changes. For more stability dynamic swings raising control is derived from trajectory equations to perform a different degree of swing rising for each leg when the robot stepping on the different level of terrain. All proposed controllers are verified in the COMET-IV actual system with walking on the designed rough terrain platform consists of random levels of hard bricks and rubber pads.
-  M. Oku, H. Yang, G. Paio, Y. Harada, K. Adachi, R. Barai, S. Sakai, and K. Nonami, “Development of Hydraulically Actuated Hexapod Robot COMET-IV – The 1st Report: System Design and Configuration,” Proc. of the 2007 JSME Conf. on Robotics and Mechatronics, 2A2-G01, 2007.
-  J. A. Galvez, J. Estremera, and P. G. d. Santos, “A new leggedrobot configuration for research in force distribution,” Mechatronics, Vol.13, pp. 907-932, Elsevier Ltd., 2003.
-  S. Nabulasi, M. Armada, and H. Montes, “Multiple Terrain Adaptation Approach Using Ultrasonic Sensors for Legged Robots,” Climbing and Walking Robots, Springer Berlin Heidelberg, 2006.
-  H. Lehtinen, “Force based motion control of a walking machine,” VTT Publication, Espoo: VTT, 1994.
-  R. Hodoshima, T. Doi, Y. Fukuda, S. Hirose, T. Okamoto, and J. Mori, “Development of a Quadruped Walking Robot TITAN XI for Steep Slope Operation – Step Over Gait to Avoid Concrete Frames on Steep Slopes,” J. of Robotics and Mechatronics, Vol.19, No.1, 2007.
-  J. C. Habumuremyi, Y. Baudoin, and P. Kool, “Adaptative Neurofuzzy Control of AMRU-5, a six-legged walking robot,” IARP WS Hudem’2004, Brussels, June 16-18, 2004.
-  T. Ohnishi and T. Asakura, “Velocity Control Strategy for a Spider-Robot Based on Autonomous Walking Form Transition,” J. of Advanced Computational Intelligence and Intelligent Informatics, Vol.10, No.1, 2006.
-  T. Yoshioka, T. Tomohito, T. Arai, and K. Inoue, “Hybrid Locomotion of Leg-Wheel ASTERISK H,” J. of Robotics and Mechatronics, Vol.20, No.3, 2008.
-  M. Pavone, P. Arena, L. Fortuna, M Frasca, and L. Patane, “Climbing obstacle in bio-robots via CNN and adaptive attitude control,” Int. J. of Circuit Theory and Applications, Vol.34, pp. 109-125, Wiley InterScience, 2006.
-  M. V. Sivaselvan, A. M. Reinhorn, X. Shao, and S. Weinreber, “Dynamic force control with hydraulic actuators using added compliance and displacement compensation,” Earthquake Engineering and Structural Dynamics 2008, Vol.37, pp. 1785-1800, Wiley Inter-Science, 2008.
-  K. Byl, “Metastable Legged-Robot Locomotion,” Ph.D. Thesis, Massachusetts Institute of Technology, Sept. 2008, Massachusetts Institute of Technology, 2008.
-  O. Damir, “Developing Matlab Simulink and xPC target real-time control environment for humanoid jumping robot,” 16th Int. Workshop on Robotics in Alpe-Adria-Danube Region, (RAAD 2007), pp. 18-23, 2007.
-  T. Ohnishi and T. Asakura, “Velocity Control Strategy for a Spider-Robot Based on Autonomous Walking Form Transition,” J. of Robotics and Mechatronics, Vol.10, No.1, 2006.
-  M. Oku, H. Koseki, H. Ohroku, Y. Harada, K. Futagami, D. C. Tran, L. Li, X. Lin, S. Sakai, and K. Nonami, “Rough Terrain Locomotion Control of Hydraulically Actuated Hexapod Robot COMETIV,” Proc. of 2008 JSME Conf. on Robotics and Mechatronics (ROBOMEC 2008), June 2008. (in Japanese)
-  H. Ohroku, A. Irawan, and K. Nonami, “A 3D modeling for Hydraulic-drive Hexapod Walking Robot using 3D Geometric Technique with distributed Numerical Model,” ICGST-ARAS J., Vol.9, Issue 1, pp. 31-39, December 2009.
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