The cable-driven segmented manipulator with cable-constrained synchronous rotating mechanisms is a new type of continuum manipulator, which has large stiffness and fewer motors, thus exhibits excellent comprehensive performance. This paper presents dynamic modeling method for this to analyze the effect friction deformation cables on dynamical behaviors system. First, driving are modeled based A...

In order to control cable-driven parallel robots (CDPRs), it is necessary keep all cable tensions within (positive) known limits during motion. For CDPRs having more cables than end-effector degrees of freedom, a feasible force distribution should be computed beforehand. This paper aims at evaluating how tension error in one affects the overall other cables, by focusing on planar overconstraine...

An identi cation of the model parameters for a parallel cable-driven robot is performed by using both a calibration and a self-calibration approach. The manipulator studied is based on a parallel architecture having 8 cables to control the 6 degrees of freedom of its mobile platform so that the mobile platform is fully constrained by the cables. Under some hypotheses on cable properties, the in...

Abstract Productivity can be increased by manipulators tracking the desired trajectory with some constraints. Humans as moving obstacles in a shared workspace are one of most challenging problems for cable-driven parallel mechanisms (CDPMs) that considered this research. One essential primary issues CDPM is collision avoidance among cables and humans workspace. This paper presents model simulat...

this article addresses an efficient and novel method for singularity-free path planning and obstacle avoidance of parallel manipulator based on neural networks. a modified 4-5-6-7 interpolating polynomial is used to plan a trajectory for a spherical parallel manipulator. the polynomial function which is smooth and continuous in displacement, velocity, acceleration and jerk is used to find a pat...

In this paper a unified contact force control approach for cable-driven parallel robots (CDPR) is proposed. The contact force controller is governed by two control loops: 1) An inner impedance control loop enforcing a dynamical relationship between the internal forces and the end-effector velocities to maintain a desired tension level in the cable system. 2) An outer admittance control loop con...

The RoboCrane is a cable driven, multi-purpose manipulator based on the Stewart Platform Parallel Link Manipulator. It provides six degree-of-freedom load control via teleoperative, graphic off-line programming, and hybrid control modes. Originally, the RoboCrane was developed under a Defense Advanced Research Project Agency (DARPA) contract to stabilize loads on conventional cranes. Currently,...