This paper develops a high dynamic and robust speed-torque control system for servo drives based on adaptive observer and self-tuning techniques with on-line inertia identification. Only the rotor position is measured even for a low precision shaft encoder. The instantaneous speed and the disturbance torque are accurately estimated by an extended Luenberger observer inertia adaptive. A current ...

The main objective of this paper is to develop a theoretically and numerically reliable efficient methodology based on combining finite element method strain gradient shear deformation plate model accounting for the nonlinear free forced vibrations cellular plates having lattice-type metamaterial cores. proposed provides modelling framework computationally more than conventional three-dimension...

1. Abdelrahman A.A., Esen I., Özarpa C., Eltaher M.A., 2021, Dynamics of perforated nanobeams subject to moving mass using the nonlocal strain gradient theory, Applied Mathematical Modelling, 96, 215-235. CrossRef Google Scholar

This paper develops a conceptual model to explain the logic of deliberately promoting structural inertia during change. Combining inertia, change, and cognitive theories it responds to criticism of Hannan and Freeman’s (1984) structural inertia theory by focusing on internal influences on organizational structure. This logic demonstrates that organizational members develop and validate beliefs ...

The present work aims to primarily provide a general representation of the solution simplified elastostatics version Mindlin’s Form II first-strain gradient elastic theory, which converges corresponding classical boundary value problem as intrinsic parameters become zero. Through functional theory considerations, one-intrinsic-parameter strain elastostatic equation that comprises is rigorously ...

Abstract In this study, a dynamic enhancement stress model for cellular materials was derived from kinematics perspective, which directly reflected the influence of inertia effect on stress. Based proposed model, densification strain calibration (DSC) analytical with wider applicability established, in stress-dependent employed. FE simulations linear hardening and power material under impact we...

In this study, the free vibration analysis of smart vibration control (SVC) systems based on Reddy – Levinson model and modified strain gradient theory is developed. This system consist of a micro beam at middle and two magneto-electro-elastic (MEE) composite micro beams at top and bottom which connected by enclosing elastic medium and simulated by Winkler and Pasternak foundation. The effects ...

We investigate hysteretic behavior in two dynamic models for solid-solid phase transitions. An elastic bar with a nonconvex double-well elastic energy density is subjected to time-dependent displacement boundary conditions. Both models include inertia and a viscous stress term that provides energy dissipation. The first model involves a strain-gradient term that models interfacial energy. In th...