Controlling a biped robot with several degrees of freedom is a challenging task that takes the attention of several researchers in the fields of biology, physics, electronics, computer science and mechanics. For a humanoid robot to perform in complex environments, fast, stable and adaptive behaviors are required. This paper proposes a solution for automatic generation of a walking gait using ge...

The motion control of a biped robot that can climb up and down stairs is studied in this work. The algorithm generates walking patterns with desired stable margin and walking speed. Only the approximate stair height and width are required. This algorithm derives the optimal hip height and uses cubic polynomial to generate the hip and foot trajectory. The control of initial and final speeds in a...

We developed a robust control policy design method in high-dimensional state space by using differential dynamic programming with a minimax criterion. As an example, we applied our method to a simulated five link biped robot. The results show lower joint torques from the optimal control policy compared to a hand-tuned PD servo controller. Results also show that the simulated biped robot can suc...

In this paper we describe a learning framework for a central pattern generator (CPG)-based biped locomotion controller using a policy gradient method. Our goals in this study are to achieve CPG-based biped walking with a 3D hardware humanoid and to develop an efficient learning algorithm with CPG by reducing the dimensionality of the state space used for learning. We demonstrate that an appropr...

Humanoid walking trajectory is a complex task, due the high number of degrees of freedom (DOFs) and changes on the mechanical structure during walking. A non-trivial problem in bipedal robot walking is the instability produced by violent transitions between different walk phases. This work presents a trajectory generation algorithm for a biped robot. The algorithm is based on cubic Hermitian po...

A humanoid soccer robot named TWNHR-IV and designed by the TKU team to attend the HuroSot League of FIRA RoboWorld Cup is presented. A platform for the study of biped walking control is designed and implemented. A system architecture for TWNHR-IV is presented, where a CMOS sensor, a digital compass, an accelerometer, and eight pressure sensors are used to obtain the information of the environme...

It is well-known that a suitably designed unpowered mechanical biped robot can \walk" down an inclined plane with a steady gait. The characteristics of the gait (e.g., velocity, time period, step length) depend on the geometry and the inertial properties of the robot and the slope of the plane. A passive motion has the distinction of being \natu-ral" and is likely to enjoy energy optimality. In...