this study has been done with the aim of determining the effect of financial and nonfinancial compensation satisfaction on employee engagement considering mediator role of perceived organizational justice. the research statistical population included eight hundred sixty two isfahan municipality employees. three hundred fourtheen persons were selected as the research sample by stratified random ...

This paper proposes an adaptive global asymptotic stable (adaptive GAS) control scheme for the compensation of friction and disturbance effect to control robot manipulators. This control method integrates both model reference technique and exact linearization. In addition, it employs disturbance compensating mechanics to control the system to follow a linear reference model which has pole place...

This paper studies the high performance robust motion control of linear motors which are subjected to significant force ripple. Based on the structural property of linear motors, some simple models with unknown weights are used to approximate the force ripple as well as other reproducible nonlinearities, such as friction. The unknown weights are adjusted on-line via certain parameter adaptation...

In comparison to classical cascade control architecture of DC motors, the state feedback control offers advantages in terms of design complexity, hardware realization and adaptivity. This paper presents a methodic approach to state space control of a DC motor. The state space model identified from experimental data provides the basis for a linear quadratic regulator (LQR) design. The state feed...

Robotized laser welding is an application, which requires high speed combined with high precision. Realistic Dynamic Simulations combined with Off-line Programming, significantly enhances the a priory prediction of the weldability of a specific product. Obviously, realistic dynamic simulations require realistic models of the robot and controller. A 3DOF robot model has been formulated which inc...

In order to get a better understanding of wear mechanisms in cutting tool materials, the internal stress states caused by complex external thermo-mechanical loads during cutting processes should be investigated. This can be done using in situ X-ray diffraction with high energy synchrotron radiation. For this reason, in first model tests, the strain state in ceramic cutting tool materials (Al2O3...

A laboratory study utilizing new techniques for assessing slip severity was conducted to investigate the process of inadvertent slips and falls among different age groups. Fortytwo subjects from three age groups (young adults, middle-aged, and the elderly) walked on a rectangular track at a self-determined pace. Without the subjects’ awareness, a slippery floor surface was placed on the track o...