Title: An integrated approach to multi-objective gait planning for bipedal robots

Authors: Amar Khoukhi

Addresses: Department of Systems Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Kingdom of Saudi Arabia

Abstract: An integrated system to multi-objective gait planning of bipedal robots is developed. First, a linearisation is defined for kinematic and dynamic models of a 19 degrees of freedom biped. Then the multi-objective gait planning is formulated. It optimises time, power and kinetic energy and singularity avoidance under limitations on actuator torques, workspace, and falling avoidance. An augmented Lagrangian is used to solve the resulting non-linear constrained optimal control problem. To ease difficult calculations of adjoin states; a decoupled form of the biped dynamics is implemented. Simulations are reported showing the effectiveness of the proposed approach.

Keywords: biped robots; nonlinear control; optimal control; multi-objective gait planning; augmented Lagrangian; decoupling; gradient projection; kinematic modelling; dynamic modelling; robot dynamics.

DOI: 10.1504/IJVAS.2009.027969

International Journal of Vehicle Autonomous Systems, 2009 Vol.7 No.1/2, pp.96 - 117

Accepted: 01 Mar 2009
Published online: 24 Aug 2009 *

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