This paper presents designing an optimal adaptive controller for tracking control of robot manipulators based on particle swarm optimization (PSO) algorithm. PSO algorithm has been employed to optimize parameters of the controller and hence to minimize the integral square of errors (ISE) as a performance criteria. In this paper, an improved PSO using logic is proposed to increase the convergenc...

Over the last couple of decades parallel robots have been increasingly studied and developed from both a theoretical viewpoint as well as for practical applications (Merlet, 1995). Advances in computer technology and development of sophisticated control techniques have allowed for the more recent practical implementation of parallel manipulators. Some of the advantages offered by parallel manip...

ivThe class of underactuated systems is composed of a variety of mechanical as well asbiological systems. The term underactuation refers to the fact that not all joints or degrees-of-freedom (DOFs) of the system are equipped with actuators, or are directly controllable.The DOFs of an underactuated system are dynamically coupled, and their dynamicequations are nonlinear and a...

This paper presents an application of Continuum (i.e. Lagrangian) and Finite Element Techniques to flexible manipulator arms for derivation of the corresponding Dynamic Equations of Motion. Specifically a one-link flexible arm is considered for detailed analysis, and the results are extended for the case of a two - link flexible manipulator. Numerical examples are given for the case of both one...

In this paper we study the control of redundant planar robotic manipulators using a switched (or hybrid) control scheme, focusing on manipulators with a degree of redundancy of one. We emphasize the eeectiveness of switched control systems with respect to stabilization and performance enhancement for this class of manip-ulators. We present a simulation study of logic{based switching control of ...

This paper describes a robust approach exploiting input-output decoupling controller for mobile manipulators. The robust controller consists of using a classical proportional-derivative (PD) feedback structure to stabilize the position error plus an additional disturbance observer (DOB) to compensate external disturbances and uncertainties. Simulation results on a mobile platform with 2-DOF man...

Simulation is a powerful visualization, planning, and strategic tool in different areas of research and development. The simulation has also a very important role in robotics. In the paper we focus on different tools for the dynamic simulation of robot manipulators, especially on those based on MATLAB/Simulink or using general dynamic engines and graphic languages. We present and compare some t...

In this paper, we propose a robust visual feedback controller with integral action for tracking control of n-link robot manipulators in the presence of constant bounded parametric uncertainties. The proposed control input has robustness to the parametric uncertainty and reduces tracking error in the steady-state. The stability of the closed-loop system is shown by Lyapunov method. The effective...

This paper presents an approach of teleoperation using impedance control for both master and slave manipulators. The 4-channel architecture with impedance control ensures enhanced transparency by appropriately controlling the dynamic behavior between motion and applied forces in the task space of the manipulators on both sides. Performance of the system is improved by using on-line estimation o...

This paper addresses the position control problem for robot manipulators. We present three new controllers with bounded actions supported by a rigorous stability analysis including the robot dynamics in the closed–loop using Lyapunov’s direct method and the LaSalle’s invariance principle. Besides the theoretical results, the performance of proposed controllers is illustrated by experimental res...