gait rehabilitation using body weight support on a treadmill is a recommended rehabilitation technique for neurological injuries, such as spinal cord injury. in this paper, a new robotic orthosis is presented for treadmill training. in the presented design the criteria such as low inertia of robot components, backdrivability, high safety and degrees of freedom based on human walking are conside...

The hydraulic servo control system, which is the important component of parallel robot, is a high order, nonlinear, dynamic asymmetry, parameter uncertain system, which seriously affect dynamic performance of robot, so it is very difficult to gain good performance with traditional control. Based on sliding mode variable structure control method combined with fuzzy control and adaptive control, ...

This paper deals with the design and analysis of a two-translation and one-rotation (2T1R) mechanism for a novel cooking robot. Firstly the motions involved in stir-fry, the most representative operation in the cooking processes used in Chinese cuisine, are analyzed in details. Then the featured motions are decomposed into four main movements that are used as a design base for a wok motion mech...

In this paper, we consider the parallel parking problem of car-like mobile robots. First, a kinematic model of the robot suitable for control applications has been derived. The problem of stabilizing the robot is seen as an extension of the tracking problem. Two types of steering controllers for straight-line tracking: bangbang (optimal) control and saturated control have been proposed. Due to ...

In this paper, a new design method considering a desired workspace and swing range of spherical joints of a DELTA robot is presented. The design is based on a new concept, which is the maximum inscribed workspace proposed in this paper. Firstly, the geometric description of the workspace for a DELTA robot is discussed, especially, the concept of the maximum inscribed workspace for the robot is ...

One of the research directions in recent decades is the construction of manipulators with parallel architecture. These mechanisms are closed-loop structures that consist of numerous separate serial chains acting in parallel and connecting the fixed base to the moving platform. Equipped with revolute or prismatic actuators, parallel manipulators have a robust construction and can move bodies of ...

When the leg rods of a fully in-parallel manipulator are fixed in their lengths, it is usual that the device can be assembled in several distinct ways. Sometimes it happens that motion between such assemblies can take place such that the linkage is never at a special configuration; that is, a configuration where the moving-platform body acquires uncontrollable freedom relative to the base. The ...

Parallel solutions to the robot control problem are an attractive alternative to single processor systems as the need for ne motion robot control increases Since multiple processors provide inherent redundancy par allel solutions to the robot control problem also a ord the opportunity to provide a degree of tolerance to both mechanical and control failure In this paper we describe a new robot c...

The present paper introduces a mobile parallel robot developed for International Thermonuclear Experimental Reactor (ITER). he task of the robot is to carry out welding and machining processes inside the ITER vacuum vessel. The kinematic design f the robot has been optimized for the ITER access. The kinematic analysis is given in the paper. A virtual prototype of the arallel robot is built. A d...

Multi-robot teams offer possibilities of improved performance and fault tolerance, compared to single robot solutions. In this paper, we show how to realize those possibilities when starting from a single robot system controlled by a Behavior Tree (BT). By extending the single robot BT to a multi-robot BT, we are able to combine the fault tolerant properties of the BT, in terms of built-in fall...