Cable-driven parallel robots offer significant advantages in terms of workspace dimensions and payload capability. Their mechanical structure transmission system consist light extendable cables that can withstand high tensile loads. Cables are wound unwound by a set motorized winches, so the robot mainly depend on amount cable each drum store. For this reason, these manipulators attractive for ...

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...

In this note, we show that the impedance control strategy proposed in the paper is not feasible from practical implementation point of view. Next, a robust impedance controller is proposed for electrically driven robots using Fourier series (FS). The fact that robots' actuators have limited voltage is also considered in controller design procedure. In comparison with other impedance controllers...

Actuators of robot operate in the joint-space while the end-effect or of robot is controlled in the task-space. Therefore, designing a control system for a robotic system in the task-space requires the jacobian matrix information for transforming joint-space to task-space, which suffers from uncertainties. This paper deals with the robust task-space control of electrically driven robot manipula...

Cable-Driven Parallel Robots (CDPRs) are a class of parallel robots whose legs are composed of cables. The cables are fixed to a mobile platform and the robot base frame. CDPRs are limited by the cable interferences and the collisions between cables and environment. Reconfigurable Cable-Driven Parallel Robots (RCDPRs) are able to reduce these drawbacks. By reconfigurable, we means that the cabl...

This paper is concerned with the problem of design and implementation a robust adaptive control strategy for flexible joint electrically driven robots (FJEDR), while considering to the constraints on the actuator voltage input. The control design procedure is based on function approximation technique, to avoid saturation besides being robust against both structured and unstructured uncertaintie...

Non Linear State Estimation of a Multi Axis Surgical Robot Srikrishnan Ramadurai Chair of the Supervisory Committee: Professor Blake Hannaford Electrical Engineering Minimally invasive surgical robots often have cable driven power transmission mechanisms. An example is the RAVEN surgical robot developed at the Biorobotics Laboratory, University of Washington for research on robotic surgery. The...