Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
The standard wind turbine (WT) control law modifies the torque applied to the generator as a quadratic function of the generator speed (Kω2) while blades are positioned at some optimal pitch angle (β∗). The value of K and β∗ should be properly selected such that energy capture is increased. In practice, the complex and time-varying aerodynamics a WT face due to turbulent winds make their determination...
This paper presents an algorithm for speed controlled of the induction motor under sensorless. According to the Lyapunov stability theory, applying the vector analysis method, through the stator current and the rotor flux are calculated then rotor speed is estimated. In order to overcome the uncertainty of system parameters and the external load disturbance, the sliding mode surface is designed based...
Precise speed control of an Interior Permanent Magnet Synchronous Motor (IPMSM) drive becomes a complex issue due to complex coupling among its winding currents and the rotor speed as well as the nonlinear nature of the developed torque. The system nonlinearity becomes severe when the IPMSM drive operates in the field weakening region. The main purpose of this paper is to present the implementation...
When a helicopter is required to hover with minimum deviations from a desired position without measurements of a persistent wind disturbance, a robustly stabilizing control action is vital. In this paper, the stabilization of the position and translational velocity of a nonlinear helicopter model affected by a wind disturbance is addressed. The wind disturbance is assumed to be a sum of a fixed number...
The adaptive backstepping nonlinear speed controller of permanent magnet synchronous servo motor (PMSSM) with uncertain parameters is designed in this paper. The inertia, viscous friction coefficient and load torque which are vulnerably affected by external disturbances can be estimated in real time. A second-order filter is adopted to reduce the speed overshoot in the starting course of PMSSM. On...
This paper presents a novel speed & position estimation algorithm for the PMSG based wind turbine using Adaptive Network-Based Fuzzy Inference System (ANFIS). The precise information of rotor speed and position is required to perform maximum power tracking in variable speed wind turbine, which is very difficult to estimate under varying operating conditions, as it may lead to parameter variation...
In this paper, experimental results for a singularity-free control algorithm capable of adapting for unknown control direction is presented. Specifically, the adaptive control design is implemented on a simple DC motor/inertial load system where the influence of the voltage control input is uncertain. Specifically, the controller is not sure whether a positive/negative torque is produced when a positive...
This paper presents a sensorless algorithm for the vector control of doubly-fed induction Machine (DFIM) using rotor current based model reference adaptive system (MRAS) observer. The stator flux oriented vector control is employed to achieve variable-speed drive and decoupled active/reactive power control. In the proposed MRAS observer, the reference model is the measured rotor current, which compared...
This paper proposes a sensorless speed control scheme based on a model reference adaptive control (MRAC) and it is applied to a Single-Phase Induction Motor. The rotor speed control algorithm is based on robust model reference adaptive controller (RMRAC). The speed estimation technique is obtained from a MRAS (Model Reference Adaptive System) algorithm, based on the motor reactive power calculation...
A vector control strategy of PMSM based on Pan-Boolean algebra self-adapting PID control is proposed in this paper, which is unnecessary to set up the exact mathematical model of the controlled plant. According to the deviation and deviation rate at different time, it is able to eliminate the influences of the parameters of the controlled plant and the disturbance of the external environment by online...
This paper introduces a new simple sensorless algorithm of estimating the permanent magnet synchronous motor (PMSM) speed and position. The proposed estimation method is implemented using a stator flux/current and a modified back electromotive force (EMF) observer connected in cascade. The flux/current observer based on sliding mode techniques ensures stator currents convergence while the modified...
In this paper, the L1 adaptive control theory is used to design a high bandwidth inner loop controller to provide attitude and velocity stabilization of an autonomous small-scale rotorcraft in the presence of wind disturbances. The nonlinear model of the vehicle is expressed as a linear time-varying system for a predefined region of operation, for which an L1 adaptive controller is designed. The L...
In this paper an variable structure speed controller for induction motor(IM) is developed, which combines the merits of sliding mode variable structure theory, direct field-oriented control (DFOC) and adaptive algorithm. Firstly, a sliding mode controller is designed and the adaptive algorithm is adopted to adjust the sliding gain in order to restrain chattering. And then a sliding mode flux observer...
in this paper, a new control approach is proposed using adaptive integral backstepping controller (AIBC) for controlling an autonomous rotorcraft. The recursive Lyapunov methodology in the backstepping technique will ensure the system stability, the integral action will increase the system robustness against disturbances and model uncertainties, and the adaptation law will estimate the modeling errors...
This work addresses the analysis and the design of an adaptive fuzzy sliding-mode observer applied to vector control of an induction motor. The conception steps for the conventional sliding-mode speed observer (SMO) are laid down clearly. In this work, the drawbacks of SMO in terms of high observer gains and chattering phenomenon due of switching surface are overcome by merging of fuzzy logic with...
In this paper, a closed loop adaptive speed observer is proposed to improve the dynamic performance of a matrix converter (MC) fed stator flux oriented DTC induction motor drive. The speed observer uses estimated rotor fluxes to estimate the rotor speed. The advantages of using a full order Luenberger observer instead of a reduced order closed loop model with the proposed speed observer, for the estimation...
This paper propose an adaptive sliding mode observer(SMO) which adds an estimation function for the stator resistance to the conventional sliding mode observer. It is proposed for the robust sensorless control of permanent magnet synchronous motor(PMSM) with variable parameters. The low-pass filter and additional position compensation of the rotor are used to reduce the chattering problem commonly...
This paper presents system analysis, modeling and simulation of an electric vehicle with different sensorless control techniques. Indeed, sensorless control is considered to be a lower cost alternative than the position or speed encoder-based control of induction motors for an electric vehicle. Two popular sensorless control methods, namely, the Luenberger observer and the Kalman filter methods are...
This paper presents a new design of 30 kw SRD based on fuzzy logic adaptive control, according to the requirement of electric vehicle to the drive system. A new structure is applied on the SRM rotor to minimize the torque fluctuation and noise of the SRM. Based on the experimental results, the SRD system has a low startup current, small torque fluctuation, wide range of speed regulation and high efficiency,...
The stochastically fluctuating offer of wind energy limits the supply capacity in electrical grids by means of technical and economical reasons. This paper analyses the influence of the control method on the power output characteristic of wind energy converters. Conventional controls, like optimal rotor speed control, and a new control, the stochastic dynamic optimization, are compared in regard of...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.