Results from simulations of a Planar Robot Model, when it is placed in the same plane of the action of the gravity force are reviewed in this paper. The model includes several parameters usually discarded in current models, such as Driving, and Non-linear Friction, for an industrial-type robotic manipulator and its actuators. When we develop more exact representations of the dynamics of a manip...

An eye-in-hand system visually tracking objects can fail when the manipulator encounters a kinematic singularity or a joint limit. A solution to this problem is presented in which objects are visually tracked while the manipulator simultaneously avoids kinematic singularities and manipulator joint limits by moving in directions along which the tracking task space is unconstrained or redundant. ...

This paper presents dynamic analysis studies of planar parallel flexible 3-RRR manipulator with and without considering the flexibility of mobile platform. Initially, by treating all the members of the manipulator as flexible, the joint displacements, reaction forces and stresses are obtained during a specified trajectory tracking in Cartesian space. A comparative study is conducted with manipu...

A novel approach to perform motion planning on 2 or 3 degrees-of-freedom manipulators utilising a fluid motion planning model is proposed. It is demonstrated that through the introduction of transformations, the conventional trajectory planning problem in the configuration space (C-space) can be efficiently solved from the closed form solution of the fluid motion planner. The proposed motion pl...

This paper presents a stable neural identifier for multivariable nonlinear systems. A state-space representation is considered based on both parallel and series-parallel models. No a priori knowledge about the nonlinearities of the system is assumed. The proposed learning rule is a novel approach based on the modification of the backpropagation algorithm. The boundedness of the identification e...

In this paper, the problem of stochastic modeling and tracking control of a two-link planar rigid robot manipulator is considered. A stochastic Lagrangian model is constructed to describe the motion of the manipulator in random vibration environment. Based on the constructed model, a state feedback controller is designed such that the error system is 4-th moment exponentially practically stable...

A simultaneous manipulator/controller design optimization problem is described using a multi-objective optimization formulation applied to an end-effector tracking problem. Dynamic performance measures, for the closed-loop system, are optimized by considering a nonlinear PD controller and quintic polynomial trajectories for point-to-point motions. Results for a planar-manipulator, a controller,...

The main focus of this work is to perform the gravity balancing of a seven degrees-of-freedom (DOFs) hybrid manipulator. A hybrid manipulator is a combination of openand closed-loop chains and contains planar and spatial links. Gravity balancing is an important aspect for robotic manipulators, especially for serial manipulators, where with increase in number of links, the gravitational effect o...

This paper presents an investigation into the dynamic modelling and characterisation of a two-link flexible robot manipulator incorporating a payload. A planar two-link flexible manipulator incorporating structural damping, hub inertia and payload that moves in the horizontal plane is considered. A dynamic model of the system is developed using a combined Euler-Lagrange and assumed mode methods...

A new method for mitigating unexpected impact of a redundant manipulator with an object in its environment is presented. Kinematic constraints are utilized with the recently developed method known as Full Space Parameterization (FSP). System performance criteria and constraints are changed at impact to return the end effector to the point of impact and halt the arm. Since large joint accelerati...