This paper describes a biped walking control system based on the reactive force interaction control at the foothold. 1) robust control of reactive force/torque interaction at the foothold based on Cartesian space motion controller. 2) the posture control considering the physical constraints of the reactive force/torque at the foothold by quadratic programming. The proposed approach realizes the...

Abstract Biped robots are inherently unstable because of their complex kinematics as well dynamics. Despite many research efforts in developing biped locomotion, the performance locomotion is still far from expectations. This paper proposes a model-based framework to generate stable locomotion. The core this an abstract dynamics model which composed three masses consider stance leg, torso, and ...

This paper proposes a model called the gravitycompensated inverted pendulum mode (G CIPM) to generate a biped locomotion pattern that is similar to the one generated by the linear inverted pendulum mode, but accommodates the free leg dynamics based upon its predetermined trajectory. When the biped locomotion based upon the linear inverted pendulum mode is applied to real biped robots, the stabi...

The postural stability of bipedal robots is investigated in perspective of foot-rotation during locomotion. With foot already rotated, the biped is modeled as an underactuated kinematic structure. The stability of such biped robots is analyzed by introducing the concept of rotational stability. The rotational stability investigates whether a biped would lead to a flat-foot posture or the biped ...

In this paper, we propose different models for estimating foot placement in biped locomotion. We use either learning approach or optimization approach to obtain such models. We evaluate these models in terms of robustness and complexity. Our results show that these models are more flexible than Inverted Pendulum Model and they provide more agility for biped locomotion under different walking sp...

In this paper, researches and advances in biped locomotion are reviewed. A detailed survey is presented describing the various research problems and the approaches reported in the literature to analyze and control biped locomotion. A method of Zero-Moment-Point (ZMP) compensation is discussed to improve the stability of locomotion of a biped which is subjected to disturbances. A compensating to...

In this paper, we report on our research for learning biped locomotion from human demonstration. Our ultimate goal is to establish a design principle of a controller in order to achieve natural human-like locomotion. We suggest dynamical movement primitives as a CPG of a biped robot, an approach we have previously proposed for learning and encoding complex human movements. Demonstrated trajecto...

This paper describes the dynamic analysis of biped locomotion systems. A planar biped is inodelled and studied focusing on the problem of energy efficiency. First, the motion of the system is characterised in terms of a set of locomotion variables, namely: step length, hip height, hip ripple, hip oflset, foot clearance and link lengths, Afterwards, three cost functions related to energy are pro...