Alexander Guskov

Synergetic synthesis of control laws for left ventricular assist device rotor on magnetic suspension

It presents a synthesis of control laws for axial blood pump rotor supported by two active magnetic bearings (AMB) based on the idea of the introduction a set of invariants of the synergetic control theory. The synthesized synergetic control laws showe advantages compared with traditional PID controller.

Finite Element Simulation of Behaviour of Granular Materials under Low-Cyclic Loading

.Different continuous elastic-plastic constitutive models (Mohr-Coulomb model, modified Cam-Clay model, modified Drucker-Prager model) are analysed with respect to their ability to simulate hysteretic behaviour of granular materials under the low-cyclic kinematic loading. The analysis is done in the framework of the quasi-static infinitesimal deformations. In case of the Mohr-Coulomb constitutive model, hysteresis degeneration into the straight line is revealed. Energy loss due to the hysteretic behaviour is studied. It is shown that horizontal areas representing the elastic behaviour are significantly longer for the Mohr-Coulomb criterion.