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Humanoid robot has the potential to manipulate wide range of tools in daily life. Arms and legs of humanoid robot contribute this ability. Above all, manipulation tasks for vehicles which are the same size as a life-sized humanoid or larger size than it require the operational motion by both arms and legs of humanoid robot. In addition to the arms and legs cooperative motion control, it is also important...
This paper analyses the torque characteristics of the shoulder and elbow joints of an assistive robotic arm for handling an object. In order to investigate those torque characteristics, we consider a model of a humanoid robot arm and simulate typical object lifting and transferring tasks by using the robot arm. Several simulations will show that the available torque patterns and ranges of the shoulder...
The work described in this paper is focused on the reduction of the impact force exerted by the ground on a falling humanoid robot. It proposes the use of variable stiffness to prevent the motors from damaging when falling is inevitable and the only possible strategy is the protection of the robot using its arms. A fuzzy system is used to estimate the low motor stiffness required to reduce the impact...
The most common approach used in modeling humanoid robots is to restrict the motion in two different planes, namely the frontal and sagittal plane, thereby using trigonometric expressions and Euler-angles for its description. In this paper some problems of trajectory interpolation and singularity of motion representation are discussed and the dual quaternion representation is used as an alternative...
Although in recent years several studies aimed at the navigation of robots in cluttered environments, just a few have addressed the problem of robots navigating while moving a large or heavy object. This is especially useful when transporting loads with variable weights and shapes without having to change the robot hardware. On one hand, a major advantage of using a humanoid robot to move an object...
This video presents the humanoid robot Acroban which is to our knowledge the first humanoid robot which is able to: 1) demonstrate playful, compliant and intuitive physical interaction with children; 2) at the same time move and walk dynamically while keeping its equilibrium even if unpredicted physical interactions are initiated by humans.
In this paper we describe the design of a Cartesian Controller for a generic robot manipulator. We address some of the challenges that are typically encountered in the field of humanoid robotics. The solution we propose deals with a large number of degrees of freedom, produce smooth, human-like motion and is able to compute the trajectory on-line. In this paper we support the idea that to produce...
In this paper, we propose a novel concept of movement primitives called Stylistic Dynamic Movement Primitives (SDMPs) for motor learning and control in humanoid robotics. In the SDMPs, a diversity of styles in human motion observed through multiple demonstrations can be compactly encoded in a movement primitive, and this allows style manipulation of motion sequences generated from the movement primitive...
In biological regulatory systems, all computations result from spatial and temporal combination of simple and homogeneous computational media. This computational scheme realize the adaptability to unpredictable environmental changes, which is one of the most salient features of biological regulations. To investigate the learning process behind this computational scheme, we propose a learning method...
This paper deals with the problem of generating realistic human-like reaching movements from a small set of movement primitives. Two kinds of movement databases are used as reference. The first one is obtained numerically, by applying biological principles of motor control on the dynamic model of the robot arm. The second one is obtained by recording reaching movements of human subjects. From these...
Humanoid robots are envisioned in general household tasks. To be able to fulfill a given task the robot needs to be equipped with knowledge concerning the manipulation and interaction in the environment and with knowledge about its own capabilities. When performing actions, e.g. opening doors or imitating human reach to grasp movements special 3-d trajectories are followed with the robot's end-effector...
This paper presents two motion generation methods for the upper body of the humanoid robot in order to guarantee the equilibrium condition of the yaw moment in bipedal planning based on the ZMP convention. The reactive torque from the ground and the effect of arms swinging on robot's body locomotion are analyzed. Therefore trunk spin motion and arms swinging motion are planned to improve the motion...
A framework to generate a human-like arm motion of a humanoid robot using an Evolutionary Algorithm (EA)-based imitation learning is proposed. The framework consists of two processes, imitation learning of human arm motions and real-time generating of a human-like arm motion using the motion database evolved in the learning process. The imitation learning builds the database for the humanoid robot...
The full-scale humanoid robot RH-1 has been totally developed in the University Carlos III of Madrid. In this paper we present a novel approach for controlling the motion of the whole body of RH-1 robot, so that it can perform tasks in collaboration with humans. Given the mechanical limitations of the robot platform, it is not possible to achieve completely tasks in collaboration with humans. The...
This paper presents the creation of a robot capable of real-time drawing artistic portraits and signature. The application is based on the successful integration of multidisciplinary techniques including face detection, image processing, face image and characters segmentation, space coordinates transformation, trajectory planning, and robot arm motion control. The autonomous human face portrait is...
This paper presents a kind of method for the inverse kinematics of a seven degrees of freedom (DoF) arm installed on a mobile humanoid robot. Due to the redundancy of 7-DoF open-chain arm, the closed-loop inverse kinematics via pseudoinverse method is used to solve the corresponding joint trajectories if the end-effector trajectory is given. Because of the existence of the null space in the kinematically...
In this paper, we present an approach that allows a robot to observe, generalize, and reproduce tasks observed from multiple demonstrations. Motion capture data is recorded in which a human instructor manipulates a set of objects. In our approach, we learn relations between body parts of the demonstrator and objects in the scene. These relations result in a generalized task description. The problem...
This paper presents a framework for the coordinated task execution by a humanoid robot. To execute given tasks, various sub-systems of the robot need to be coordinated effectively. The goal of our paper is to develop the framework which makes it possible to interact with humans while executing various tasks in daily life environments. A script is used as a tool for describing tasks to easily regulate...
This paper presents an application of neurobiological motor principles to the control of humanoid robot reaching movements. The model is mainly based on the hypotheses that the energy of motoneurons signals is continuously minimized along the motion and that dynamic and static efforts are processed separately. This paradigm is used to control the robot HRP2 by considering a dynamic model of the arm...
Human beings usually locate their hand at the position with a higher moving potential in order to easily deal with various situations. Inspired by the human hand-arm movement, this study proposes a motion control issue for a serial-linkage finger-arm robot according to Wf.
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