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In this paper, three convenient, efficient and accurate virtual scene modeling methods are proposed for robot manipulators. 3D modeling softwares in terms of SolidWorks and UG are exploited to construct the 3D models of the virtual scene. The 3D models are established and the data are used and shared by OpenGL and VRML. The virtual scene is displayed on Visual C++, LabVIEW and MATLAB platform, which...
The design procedure for a new decoupled flexure-based XYZ compliant parallel-kinematics micropositioning stage is presented in this paper. The designed XYZ stage owns a compact structure constructed by three monolithic limbs and has both input and output decoupling properties. The output decoupling is allowed by the employment of a proposed 2-D compound parallelogram flexure, and the input decoupling...
This paper firstly presents a method to formulate the dynamics of the mobile humanoid robot which is composed by the mobile platform and the upper body. As tip-over is an important stable issue for the mobile robot, the dynamic stability constraint is carefully studied to keep the robot stable. Stable support for the robot moving on a plane is solved. With the consideration of the stability problem...
This paper first presents a modeling method for a mobile humanoid robot whose upper human-like body is mounted on a mobile platform supported by three wheels (two driving wheels and one caster wheel). The upper body connects the platform by two-DOF joint and the wheeled platform moves on the ground subject to nonholonomic constraints. Then based on Lie groups and screw theory, the kinematics and dynamics...
When a mobile robot performs some special tasks, such as carrying a heavy load, moving on a slope or rough terrain, particularly contacting with the environment, it may become unstable even overturn. First, the paper presents a mobile humanoid robot whose upper human-like body is mounted on the mobile platform supported by three wheels (two driving wheels and one caster wheel) and subjected to nonholonomic...
This paper addresses a formation control issue for a group of robots with dynamic interaction topology. Normally given a formation shape (pattern), if interaction topology changes from time to time, formation control developed for continuous systems may fail to keep formation, because the system may be not continuous any longer. This paper introduces a decentralized formation control to realize formation...
This paper presents a kind of modeling method for a two-body mobile robot, provides with its kinematic structure parameters and analyzes the forward kinematics and inverse kinematics. Considering the case of surpassing obstacles actively for this two-body mobile robot, the solutions of inverse kinematics are given out based on the geometric approach. Surpassing obstacles and turning analysis are made...
The concept of a medical parallel robot applicable to chest compression in the process of cardiopulmonary resuscitation (CPR) is proposed in this paper. According to the requirement of CPR action, a three-prismatic-universal-universal (3-PUU) translational parallel manipulator (TPM) is designed and developed for such applications, and a detailed analysis has been performed for the 3-PUU TPM involving...
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