6‐DOF parallel robot always appears in the form of Stewart platform. It has been widely used in industry for the benefits such as strong structural stiffness, high movement accuracy and so on. Space docking technology makes higher requirements of motion accuracy and dynamic performance to the control method on 6‐DOF parallel robot. In this paper, a hydraulic 6‐DOF p...

In bilateral teleoperation of a dexterous task, to take full advantage of the human’s intelligence, experience, and sensory inputs, a possibility is to engage multiple human arms through multiple masters (haptic devices) in controlling a single slave robot with high degrees-of-freedom (DOF); the total DOFs of the masters will be equal to the DOFs of the slave. A multi-master/single-slave cooper...

We present a new optimization-based approach for robotic motion planning among obstacles. Like CHOMP (Covariant Hamiltonian Optimization for Motion Planning), our algorithm can be used to find collision-free trajectories from naïve, straight-line initializations that might be in collision. At the core of our approach are (a) a sequential convex optimization procedure, which penalizes collisions...

Humans are usually better than autonomous robots in operating in complex environments. In bilateral teleoperation, to take full advantage of the human’s intelligence, experience, and sensory inputs for performing a dexterous task, a possibility is to use the two hands of the user to manipulate two master haptic devices in order to control a slave robot with multiple degrees-of-freedom (DOF); th...

Through the implementation of reconfigurability to achieve flexibility and adaptation tasks by morphology changes rather than increasing number joints, malleable robots present advantages over traditional serial robot arms in regards reduced weight, size, cost. While limited degrees freedom (DO...

In this paper we present the design, fabrication, and testing of a robot for automatically positioning ultrasound imaging catheters. Our system will point ultrasound (US) catheters to provide real-time imaging of anatomical structures and working instruments during minimally invasive surgeries. Manually navigating US catheters is difficult and requires extensive training in order to aim the US ...

This paper presents a synchronous proportional derivative (PD) control method using time delay estimator (SPD-TDE) for four-degree-of-freedom (DOF) parallel robot in practice. The proposed is that developed from PD combined with to guarantee the tracking objectives and requirements of robot. Firstly, designed by defining cross-coupling errors. A error determined incorporating deviation among tw...

Purpose Recently, various applications of robotic systems to construction sites have been tried. In this research, a mobile platform-based serial manipulator, the so called ‘mobile manipulator’, is employed for construction tasks such as material handling, beam assembly, welding, and so on. Generally, a serial manipulator has 6 DOF (degrees of freedom). The mobile manipulator suggested in this ...

Master-slave active robot hands and endoscopes, which provide dexterous manipulations and wide views like human hands and eyes, are required to be constructed. We have previously developed a multi-DOF ultrasonic motor consisting of a spherical rotor and a bar-shaped stator. The rotor rotates around three perpendicular axes using three natural vibration modes of the stator. In this study, a mult...

A family of reconfigurable parallel robots can change motion modes by passing through constraint singularities by locking and releasing some passive joints of the robot. This paper is about the kinematics, the workspace and singularity analysis of a 3-PRPiR parallel robot involving lockable Pi and R (revolute) joints. Here a Pi joint may act as a 1-DOF planar parallelogram if its lockable P (pr...