This paper presents a new algorithm based on Model Reference Adaptive System (MRAS) and its stability analysis for sensorless control of Doubly-Fed Induction Generators (DFIGs). The reference and adjustable models of the suggested observer are based on the active power of the machine. A hysteresis block is used in the structure of the adaptation mechanism, and the stability analysis is performe...

Abstract At present, sensorless becomes a research hit for its lower cost and smaller size, among the present methods, Luenberger Observer has outstanding advantages dynamic performance, parameter robustness high system stability. In this paper, model of which is based on state equation permanent magnet synchronous motor (PMSM), changes residence induce may lead to error are also analysed, in o...

this paper employs nonlinear disturbance observer (ndo) for robust trajectory-free nonlinear model predictive control (nmpc) of biped robots. the ndo is used to reject the additive disturbances caused by parameter uncertainties, unmodeled dynamics, joints friction, and external slow-varying forces acting on the biped robots. in contrary to the slow-varying disturbances, handling sudden pushing ...

in this paper, a reaction system consisting of two parallel, non-isothermal autocatalytic reactions in a continuous stirred tank reactor (cstr) has been considered. reactor chaotic behavior is possible for certain values of system parameters. two types of controllers are designed and compared in order to control both the reactor temperature and the product concentration. the first controller is...

The active control of hydrodynamic bearings is beginning to receive more attention in the pursuit lower power losses and reduced maintenance. This paper presents a method by which, from simple measurements, rich information can be deduced running bearing that used modify operating parameters unit. line-pivot, unidirectional, steadily loaded, directly lubricated tilting pad thrust bearing. achie...