This work considers the computational costs associated with the implementation of a failure-tolerant path planning algorithm proposed in [1]. The algorithm makes the following assumptions: a manipulator is redundant relative to its task, only a single joint failure occurs at any given time, the manipulator is capable of detecting a joint failure and immediately locks the failed joint, and the e...

This article investigates the problem of redundant manipulator design for optimal dynamic performance as applied to the design of macro/mini structures. The dynamic performance of a manipulator is characterzzed by the inertial and acceleration properties of the end-effector. However, for redundant manipulators the characteristics of motions in the end effector null space must also be considered...

Optimal load of mobile robots, while carrying a load with predefined motion precision is an important consideration regarding their applications. In this paper a general formulation for finding maximum load carrying capacity of flexible joint mobile manipulators is presented. Meanwhile, overturning stability of the system and precision of the motion on the given end-effector trajectory are take...

The force-moment capabilities of redundantlyactuated planar-parallel manipulator (PPM) architectures are investigated. A previously developed explicit methodology for generating the force-moment capabilities of redundantly-actuated PPMs is used on three different architectures. The results for the 3-RRR, 3-RPR, 3-PRR layouts, where the underline denotes the actuated joints, are presented and di...

Workspace quality analysis and application for a completely restrained 3-Dof planar cable-driven parallel manipulator Xiaoqiang Tang, Lewei Tang, Jinsong Wang and Dengfeng Sun The State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China School of Aeronautics and Astronautics Engineering, Purdue University, West Lafayette, IN 47907-2045...

This paper addresses the dimensional synthesis of parallel kinematics machines. A multiobjective optimization problem is proposed in order to determine optimum structural and geometric parameters of parallel manipulators. The proposed approach is applied to the optimum design of a three-degree-of-freedom planar parallel manipulator in order to minimize the mass of the mechanism in motion and to...

The aim of this paper is the kinematic study of a 3-RPR planar parallel manipulator where the three fixed revolute joints are actuated. The direct and inverse kinematic problem as well as the singular configuration is characterized. On parallel singular configurations, the motion produce by the mobile platform can be compared to the Reuleaux straight-line mechanism.

We consider a planar continuous robotic manipulator and determine the reachable set of its end-e ector with and without prescribed terminal direction. To do so we use optimal control and geometric techniques similar to those used in solving Dubins` problem. We also solve the synthesis problem of Dubins` problem with free terminal direction.