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Virtual humans or avatars are three-dimensional (3D) solid models, generated by computers. They are realistic and vivid forms having motion control capabilities. Human communication consists of more than words, and virtual human body movements are also a kind of communication way. In this paper, we propose a method of costume designing and animation synthesis for personalized avatars. A lot of sensors...
In this work an interface based on inertial sensors with applications for unilateral master - slave robotic teleoperation is developed. In such tasks the interface with which the user interacts plays a key role. In general the interface should be comfortable and to allow free user motion. The interface here proposed is composed of two portable inertial sensor units which are placed on the upper and...
An effective controller is crucial for a humanoid robot since a humanoid robot generally has more than thirty DOFs to be controlled in real-time and needs to deal with information of multiple sensors. On the other hand, real-time fault diagnosis is increasingly important for the humanoid robot due to its mechanism and control complexity and inherent instability of risking tipping itself over. In this...
This paper presents the design and validation of a wearable glove-based multi-finger motion capture device (SmartGlove) with a specific focus on the development of a new optical linear encoder (OLE). The OLE specially designed for this project has a compact size, light weight and low power consumption. The characterization tests also show that the OLE's digital output has good linearity and accuracy...
Many humanoids have been developed, but more complicated and flexible humanoids must be developed, in order to realize more natural and various motions like humans. However, it is difficult to measure directly joint posture in the multi-dofs joint of such robots (e.g. a hip spherical joint) because of its complicated structure. This paper describes an estimation method for tendon-driven joint postures...
This paper presents a method for controlling the zero moment point (ZMP) of walking robots by using spring-mass systems mounted on the robot body. A pair of oscillating spring-mass systems makes a swing motion of the ZMP via periodic change of the spring forces. In contrast to usual methods, where ZMP is controlled through motion planning in terms of joint trajectories, the proposed method is not...
This paper presents an approach to control gaits of humanoid bipedal robots in operational space without reference trajectories. This control strategy is based on the planning of the sequential events during the walking process. The aim of this study is to propose a new control strategy which is more reactive, permits a precise coordination of both legs during the double stance phase and the generation...
A legged locomotor device for paraplegics have been attempted to improve their ADL and to prevent some complications. A stride control of the system based on the user's intension is important to coordinate the voluntary movements of the user and the assisted movements of the paralyzed legs. In this paper, we propose a human interface with a walker to control the stride length of a legged locomotor...
The subjective ease with which we move gracefully in constraint filled uncertain environments often masks the enormously complex integrative apparatus needed to spell synergy among the thousands of sensors, joints, musculo-skeletal units and neuronal populations that contribute to any act's planning and execution. In this paper, we apply the computational framework of passive motion paradigm for task...
The mobile robot with an orthogonal-wheel assembly has omnidirectional motion ability and simple kinematic model for controller design. However, two sliced spheres that switch upon movement are likely to cause disturbances that act on the wheeled motor robot (WMR)'s body. The purpose of the traditional control for a WMR is high joint control stiffness using odometry, which might worsen the trajectory...
A wearable sensor network is developed to track the human joint motion with high accuracy. One sensor unit consists of an accelerometer and a miniature linear sensor. We design one motion-based interface based on the wearable sensor network, in which users can control the virtual characters in both a video game and an online virtual environment (Second Life) by moving their wrists and knees. Based...
An articulated aerial work platform is a type of off highway vehicle with a long/flexible beam to provide temporary access to inaccessable areas. The motivation of the research is to improve productivity and safety of the work platform via advanced control schemes. In this paper, a motion control architecture is presented for trajectory tracking and vibration suppression. By using the sensors integrated...
This paper proposes a method of directly measuring static constraints imposed by a human hand on a grasped object. Based on the analysis of the demonstration data of the human grasp, the static constraints are expressed as a combination of frictional force and normal force generated by the human hand. The static constraints are an important property to be mapped to robotic hands in the programming-by-demonstration...
This paper proposes a data glove for a rehabilitation robot interface for the upper-extremity paralysis. The designed data glove uses seven flexible sensors to measure the flexion angles of fingers and wrist. We verified the performance of the data glove using a 3D graphic interface from we developed. From experimental results, we show the proposed data glove is feasible to sense the hand motions...
The paper deals with development and realisation of the motion control for a very precise mechanism of a rocking knife driven by an electrical drive. The rocking knife provides transversal cutting of a moving steel strip into flat sheets of various, adjustable lengths. After development of mathematical model of the controlled mechanism there is designed the trajectory of the mechanism and based on...
Structure of a humanpsilas muscular-skeleton system is supposed to play an essential role for realizing dynamic locomotion such as jumping and running. This paper investigates the effectiveness of the human-like morphology for dynamic bouncing. We designed a monopod that had a bio-mimetic muscular-skeleton system utilizing pneumatic artificial muscles. Through the experiments, we confirmed that the...
We present a method that allows automatic reaction of a robot to physical collisions, while preserving as much as possible the execution of a Cartesian task for which the robot is kinematically redundant. The work is motivated by human-robot interaction scenarios, where ensuring safety is of primary concern whereas preserving task performance is an appealing secondary goal. Unexpected collisions may...
A humanoid robot generally has more than thirty DOFs to be controlled in real-time and needs to deal with information of multiple sensors such as encoders, force and moment sensors, inertial attitude sensors and vision sensors. Therefore an effective control system is crucial for the humanoid robot. In this paper, we propose a distributed computer system consisting of the online planning sub-system...
It is a key issue for mobile robot navigation to have the ability of accurate and reliable dead reckoning. Aimed at this issue, dead reckoning of mobile robot in complex terrain is analyzed by the rigid-body kinematic constraints of mobile robot. At the same time, the kinematic model of mobile robot is obtained using multiple proprioceptive sensorspsila information from odometry, fiber optic gyro,...
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