Wrench and Twist Capability Analysis for Cable-Driven Parallel Robots With Consideration of the Actuator Torque–Speed Relationship

Planar Cable-Direct-Driven Robots: Design for Wrench Exertion

PLANAR CABLE-DIRECT-DRIVEN ROBOTS: DESIGN FOR WRENCH EXERTION Robert L. Williams II Department of Mechanical Engineering Ohio University Athens, Ohio Paolo Gallina Dipartimento di Innovazione Meccanica e Gestionale University of Padova Padova, Italy Journal of Intelligent and Robotic Systems Vol. 35, pp. 203-219 2002

Geometrico-static Analysis of Under-constrained Cable-driven Parallel Robots

This paper studies the kinematics and statics of cable-driven parallel robots with less than six cables, in crane configuration. A geometrico-static model is provided, together with a general procedure aimed at effectively solving, in analytical form, the inverse and direct position problems. The stability of equilibrium is assessed within the framework of a constrained optimization problem, fo...

Stability Analysis and Robust PID Control of Cable Driven Robots Considering Elasticity in Cables

In this paper robust PID control of fully-constrained cable driven parallel manipulators with elastic cables is studied in detail. In dynamic analysis, it is assumed that the dominant dynamics of cable can be approximated by linear axial spring. To develop the idea of control for cable robots with elastic cables, a robust PID control for cable driven robots with ideal rigid cables is firstly de...

Disturbance Robustness Measures and Wrench-Feasibile Workspace Generation Techniques for Cable-Driven Robots

Navigating the Wrench-Feasible C-Space of Cable-Driven Hexapods

Motion paths of cable-driven hexapods must carefully be planned to ensure that the lengths and tensions of all cables remain within acceptable limits, for a given wrench applied to the platform. The cables cannot go slack –to keep the control of the platform– nor excessively tight –to prevent cable breakage– even in the presence of bounded perturbations of the wrench. This paper proposes a path...