We have been developing exoskeletal robots in order to assist the motion of physically weak persons such as elderly persons or handicapped persons. In our previous research, a prototype of a two degree of freedom exoskeletal robots for shoulder joint motion assist have been developed since the shoulder motion is especially important for people to take care of themselves in everyday life. In thi...

In this paper a new example of a hopping robot is considered, consisting simply of two links (the end of one link acts as the foot) joined by an actuated, revolute joint. For the stance phase a nonlinear controller is derived that maintains the balance o f t h e robot and periodically accelerates the center of mass vertically. For large enough oscillations the robot can slide or take off. If fl...

Space robots are an effective resource for astronauts working in a dangerous space environment. This paper proposes and implements a system to validate the performance of robot movement in space. A humanoid robot was designed with a vision-based self-calibration and navigation system. In addition, a path planning method was proposed to minimize joint torque. Simple gravity-compensation equipmen...

This thesis describes the design and implementation of a Walking Algorithm for the humanoid robot. The humanoid is intended to be an autonomous robot, and has a total of 6 degrees of freedom coming from the hip joint, knee joint and ankle joint for each leg. The aim of this thesis project is to develop a walking pattern to control and walk in a stable manner. Exploit methods for developing a na...

We describe a model for task-driven, naturallanguage-based human-robot interaction where the roles of the two participants are fully interchangeable, both at the conversational level and at the task level. This model provides a general treatment of joint-action dialogue, and also allows models based on the analysis of human-human joint-action dialogues easily to be implemented and evaluated. I....

Cooperation is at the core of human social life. In this context, two major challenges face research on human-robot interaction: The first is to understand the underlying structure of cooperation, and the second is to build, based on this understanding, artificial agents that can successfully and safely interact with humans. Here we take a psychologically grounded and human-centered approach th...

Abstract In this paper, a stability control approach of flexible joint robot (FJR) based T-S fuzzy model using fuzzy Lyapunov function is proposed. First, the Takagi and Sugeno (T-S) fuzzy model is employed to approximate the flexible joint robot, then a fuzzy controller is developed based on parallel distributed compensation principle (PDC). The non-quadratic stability conditions for the flexi...

This article presents a novel on-line optimal control for redundant robot manipulators for which inverse kinematics is not required. The controller considers a Cartesian PID control that yields stability of the closed loop, but presents poor performance unless using high gains. A joint space dynamic optimal control based on the gradient flow approach is introduced to improve the performance of ...

A large part of the new generation of computer numerical control systems has adopted an architecture based on robotic systems. This architecture improves the implementation of many manufacturing processes in terms of flexibility, efficiency, accuracy and velocity. This paper presents a 4-axis robot tool based on a joint structure whose primary use is to perform complex machining shapes in some ...