Position/force control of biped walking robots

The paper addresses the problem of modelling and control of a biped robot by combining Cartesian based position and force control algorithms. The complete walking cycle is divided into two phases: i) single support, in which is studied the trajectory controllability based on simple motion goals and ii) exchange of support, in which the forward leg absorbs the impact and then gradually accepts the robot's weight. The contact of the foot with the constrained surface is modelled through linear spring-damper systems. The system's controllability is enhanced through the insertion of a dynamic selection matrix that modifies the actuating profile in each phase. The control algorithms are simulated and their effectiveness and robustness are discussed.

[1]  Akihito Sano,et al.  Sensor-Based Control of a Nine-Link Biped , 1990, Int. J. Robotics Res..

[2]  Tad McGeer,et al.  Passive Dynamic Walking , 1990, Int. J. Robotics Res..

[3]  Atsuo Takanishi,et al.  Development of a biped walking robot adapting to a horizontally uneven surface , 1994, Proceedings of IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS'94).

[4]  José António Tenreiro Machado,et al.  Energy analysis during biped walking , 1999, Proceedings 1999 IEEE International Conference on Robotics and Automation (Cat. No.99CH36288C).

[5]  H. Hemami,et al.  The inverted pendulum and biped stability , 1977 .

[6]  Marc H. Raibert,et al.  Legged Robots That Balance , 1986, IEEE Expert.

[7]  Ambarish Goswami,et al.  Postural Stability of Biped Robots and the Foot-Rotation Indicator (FRI) Point , 1999, Int. J. Robotics Res..

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

[9]  Yuan F. Zheng,et al.  Impact effects of biped contact with the environment , 1984, IEEE Transactions on Systems, Man, and Cybernetics.