Towards an autonomous small-size humanoid robot: design issues and control strategies

This paper presents the design considerations of a small-size humanoid robot. The design process has revealed much about the several problems, challenges and tradeoffs imposed by biped locomotion. Among them, we here focus on the control of a single leg and its behaviour when assuming a forward motion. The controller is based on simple motion goals taking into account the reaction forces between the feet and the ground. A new method is proposed which appears to be well adapted to the class of problem considered: the use of a fractional-order controller combined with a genetic algorithm for optimal tuning of the control parameters. The control algorithm is tested through several simulations and its robustness is discussed.

[1]  Jerry E. Pratt,et al.  Intuitive control of a planar bipedal walking robot , 1998, Proceedings. 1998 IEEE International Conference on Robotics and Automation (Cat. No.98CH36146).

[2]  Atsuo Kawamura,et al.  Robust biped walking with active interaction control between foot and ground , 1998, Proceedings. 1998 IEEE International Conference on Robotics and Automation (Cat. No.98CH36146).

[3]  Atsuo Takanishi,et al.  Development of a bipedal humanoid robot-control method of whole body cooperative dynamic biped walking , 1999, Proceedings 1999 IEEE International Conference on Robotics and Automation (Cat. No.99CH36288C).

[4]  J. Machado.  Analysis and design of fractional-order digital control systems , 1997 .

[5]  Jong Hyeon Park,et al.  Impedance control for biped robot locomotion , 2001, IEEE Trans. Robotics Autom..

[6]  Miomir Vukobratović,et al.  Biped Locomotion: Dynamics, Stability, Control and Application , 1990 .

[7]  Masayuki Inaba,et al.  A Fast Dynamically Equilibrated Walking Trajectory Generation Method of Humanoid Robot , 2002, Auton. Robots.

[8]  Friedrich Pfeiffer,et al.  Sensors and Control Concept of Walking “Johnnie” , 2003, Int. J. Robotics Res..

[9]  José António Tenreiro Machado,et al.  Towards force interaction control of biped walking robots , 2004, 2004 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) (IEEE Cat. No.04CH37566).

[10]  T. Takenaka,et al.  The development of Honda humanoid robot , 1998, Proceedings. 1998 IEEE International Conference on Robotics and Automation (Cat. No.98CH36146).

[11]  K. Miller,et al.  An Introduction to the Fractional Calculus and Fractional Differential Equations , 1993 .

[12]  S. Kajita,et al.  Experimental study of biped dynamic walking , 1996 .