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 main challenge with lithium-ion batteries in vehicular applications is aging. It is known that the battery aging is sensitive to various factors such as current, temperature and depth of discharge. These elements have a considerable impact on the loss of the battery's capacity, as well as on the increase of the internal resistance. In this article, we present an analysis of the aging of lithium-ion...
This manuscript presents a universal control law for a class of complex dynamic systems, such as mobile robots. The trajectory tracking problem is among the major problems in the field of robotics. The proposed universal control law solves the trajectory tracking problem of mobile robots. Despite a large body of research on developing robot's control laws conducted in the literature, the dynamic effects...
This paper introduces a universal real-time control platform for complex research and development (R&D) based products design. The inherent complexity in R&D projects makes products development a difficult task to undertake. The use of state of the art development tools for modeling, simulation, and hardware-in-the-loop (HIL) validation contributes to a complexity reduction. However, R&D...
This paper presents a supercapacitor prediction aging model according to the voltage and to the temperature for telecommunication applications. To investigate this phenomenon, an experimental test bench is designed to accelerate the supercapacitors' calendar aging. Experimental tests are carried out at constant temperatures when the supercapacitors are polarized at the maximum voltage. To quantify...
This manuscript contributes to the development of a neighboring optimal control law coupled with estimation for solving the trajectory tracking and/or regulator problem of a twin-rotor multi-input multi-output system (TRMS). The proposed control law is able to provide necessary control inputs to the TRMS's main and tail rotors so that its actual azimuth and elevation angles follow a pre-defined ones...
In this manuscript, an adaptive control strategy is presented for the inverted pendulum motion and posture control problem. The system's complexity increases significantly in the presence of nonlinear friction. The control strategy use a Lyapunov stability-based online adaptation technique to guarantee asymptotic motion tracking and posture control. Moreover, an adaptive friction compensation method...
A neural network controller is presented for the direct power control of a doubly fed induction generator (DFIG) in a wind turbine. Due to the variability of wind speed, aerodynamic control of the pitch angle of the turbine blades is necessary to capture maximum power from the wind. An alternative control strategy for tracking the maximum power that can be extracted is by accurate control of the turbine...
This paper presents a neural network oriented approach for online estimation of the state of charge (SOC) for lithium-ion batteries. Unlike other estimation strategies, this proposed technique requires no knowledge of any battery parameter and no mathematical model of the battery rather it takes into consideration ambient temperature variations while estimating the SOC. Experimental results highlight...
In this paper, we present an adaptive controller of piezoactuators without velocity measurement for microelectromechanical systems. The adaptive control scheme uses a Lyapunov-based adaptation law to track the system's parameters. Then, a reduced-order observer is used in a feedback loop to estimate velocity, hysteresis and disturbance. Unlike many observer-based controllers, the observer performance...
This work presents a robust method of implementing a Phase-Locked Loop (PLL). The stability of traditional PLLs currently in use is majorly dependent on the balanced conditions of the grid voltage, which is not always the case. The stability of the strategy being proposed, however, is independent of the symmetry of the grid voltage. When the grid voltage is in phase with the PLL output voltage, the...
This paper introduces an adaptive current control strategy for DC-DC boost converters without input-output voltage sensing. In addition, accurate current control is achieved in the presence of dynamical uncertainties. Unlike many controllers available for DC-DC converters, the adaptive controller's stability is guaranteed by Lyapunov stability theory. A comparison to PI counterpart has been carried...
This paper presents the control study of a variable speed Wind Energy Conversion System (WECS) based on the Doubly Fed Induction Generator (DFIG). The generator is connected directly to grid by its stator and fed by a Matrix Converter (MC) at its wound rotor. The indirect vector control is adopted. The stator flux is oriented for controlling the power and current, which are regulated by PI controller...
Supercapacitors have received an increasing interest from the power electronics community due to their high power density and compact size. These advantages make them good candidates for high-performance applications, such as electric/hybrid vehicles. In transportation application, the calendar phase presents an important part in the supercapcacitor life cycle. Understanding the aging calendar behavior...
Accurate control of the wind turbine at its optimal rotational speed for a given wind speed is required to extract maximum power from the wind turbine generator system in the absence of aerodynamic pitch control. Due to inherent wind turbine nonlinearities and unpredictable wind speed fluctuations, precise control is a difficult task to undertake. This paper presents a sliding mode speed controller...
In this work, a Sensorless hybrid control system is proposed for PMSMs requiring only knowledge of flux linkage. The control scheme consists of two adaptive fuzzy logic controllers for speed and direct current control, respectively. On the other hand, an Artificial Neural Network (ANN) based observer is used to estimate rotor speed and the rotor position is obtained by using integration to reduce...
This paper introduces a simple adaptive fuzzy controller structure for permanent magnet synchronous machines (PMSMs). Unlike many PMSM-based control techniques, the proposed strategy achieves tracking with no current loop regulation which yields reduced complexity. A simple and effective method is used to set d-axis voltage of the machine to achieve good machine's efficiency. The control scheme and...
In this paper, a state of charge (SoC) and state of health (SoH) estimator is presented for lead-acid batteries. The estimation strategy is based on adaptive control theory for online parameters identification. To speed up the estimator's convergence, the adaptation law is replaced by a genetic algorithm (GA). Therefore, robustness to parameters variation is also achieved and thus, accurate prediction...
An adaptive fuzzy logic control (FLC) scheme is presented for permanent magnet synchronous machines (PMSMs) as an alternative to conventional control techniques. Unlike other controllers, the proposed strategy achieves speed tracking without any current loop regulation, which yields reduced complexity. However, the absence of current control leads to higher energy consumption and limits the operation...
This paper introduces a custom real-time control platform design for a quadrotor. The control framework is designed to be universal but yet, flexible for implementation of various control and navigation algorithms. The developed platform is modular and is presented in three categories: hardware, software and communication. System identification is also presented for parameters measurement and estimation...
In this paper, a balance control scheme is introduced for hopping robots using neural networks. The control strategy uses a trade-off strategy to achieve both hip and body angle control simultaneously with a single controller, which yields reduced complexity. Hence, the proposed controller allows the hopping robot to track a pre-defined state trajectory in flight-phase despite its modeling uncertainties...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.