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We proposed two adaptive control methods for speed control of brushless direct current(BLDC) motor disturbed by two kinds of disturbances in this paper. The dynamic model of BLDC motor possessing either parametric uncertainties disturbed by unknown with known bound external disturbances or parametric uncertainties disturbed by unknown with known structure model external disturbances is considered,...
Maximum Torque Per Ampere (MTPA) tracking techniques for the control of Interior Permanent Magnet Synchronous Machines (IPMSMs) and Synchronous Reluctance Machine (SynRMs) drives were introduced in the last decade, with the aim of overcoming the dependence on motor parameter knowledge accuracy. In fact, uncertainty due to identification errors, magnetic saturation or temperature variation results...
This paper deals with the use of PID-type fuzzy adaptive controller in the application of speed control of real two-mass servo-drive system and comparing with the conventional PI controller. For simulation and tuning of conventional PI controller's coefficients identification of object parameters is performed. To identify unknown mechanical parameters in this system “motor-device” experimental data...
In recent years, adaptive and intelligent control schemes have begun to take the place of conventional control methods. In this study, a model reference adaptive control (MRAC) scheme based on genetic algorithm (GA) and Fuzzy Logic (FL) has been used by the help of Vector Control type driving method based on Space Vector Pulse Width Modulation (SVPWM). In this control technique, the conventional PI...
In this study, speed control problem of a permanent magnet DC motor considered in the existence of disturbance and unknown plant parameters. Self-tuning adaptive control technique is used to solve the problem. Firstly, an ARX model of the plant is considered with recursive identification of its parameters then the parameters and predefined performance criteria is combined to design an adaptive controller...
This paper presents an direct adaptive control for an uncertain electric seatless unicycle using wavelet fuzzy cerebella model articulation controller (WFCMAC). The WFCMAC is proposed to approximate the equivalent control part and uncertainties. A nonlinear backstepping sliding-mode controller with on-line adaptive laws is presented to accomplish adaptive robust self-balancing and speed control of...
In recent years, wind energy has become an important part of the electrical power generation. Wind variations produce mechanical power fluctuations and consequently the speed changes in the turbine rotor lead to variations in the currents and voltages produced by the wind generators. The purpose of this paper is the setpomt regulation of the angular speed of a wind turbine via the control of a rectified...
An objective to control power flow in intermediate DC link of typical induction drive converter has been introduced and respective drive setup intended for such task. Theoretical considerations and simulation results of control approach utilizing available drive controller capabilities like direct torque control and speed control, as well as introduction of additional adaptive funnel type controller...
This paper presents the implementation of adaptive control of an electric wheelchair. The control objective is to control the velocity of the left and right wheels to follow the desired velocity commands. The equations of motion of the wheelchair are derived. This system compared the wheel rotational velocity that is measured by the encoder with the reference model. The adaptive control equation stability...
In speed control systems, which is desirable is that the speed of a controlled object should track the reference speed as fast as possible and at the same time should provide good robustness to load variations. As far as conventional PI controllers are concerned, once their parameters are tuned for solely one operating condition, they remain constant during the whole operational cycle and therefore,...
The paper addresses the problem of speed control for the SeaFox unmanned surface vessel (USV). This small, versatile robotic platform can operate over a wide range of speeds, making it attractive for a number of scientific, commercial, and naval applications. This versatility, however, comes at a price. The vessel operates in displacement mode at low speeds and operates in planing mode at high speeds...
This paper deals with model-based two-degrees-of-freedom (2DOF) speed control of two-mass systems. An analytic gain selection of a proportinal integral (PI) type feedback controller is proposed. The gains are given as functions of system parameters and desired dominant closed-loop poles. An analytic design of a prefilter is given to complete the 2DOF structure, using the pole-zero distribution of...
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...
This paper proposes a position sensorless control of interior permanent magnet synchronous motors; this method involves the use of an adaptive observer based on direct-type adaptive control for achieving an improvement in responses of speed estimation and control. Although various adaptive observers based on indirect-type adaptive control have been extensively studied so far, improvement in response...
As the SRD system is multivariable, highly coupled and nonlinear, it is difficult to get a satisfied result by the conventional control. In this paper, the adaptive fuzzy PID controller is designed as the speed regulator, by using the Simulink toolbox of the Matlab, the result shows that the controller can reduce the overshoot, improve the accuracy and possess good robustness.
In order to overcome the parameter uncertainties, enhance the fast tracking performance of PMSM servo system, a brand-new two-dimension PED fuzzy controller, fuzzy PI+ fuzzy ED, is proposed first in this paper. The self-tuning fuzzy PI+ fuzzy ID controller is fast; computing on-line easily and can reduce stability error, especially fitting for application in the speed control of the PMSM servo system...
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...
This paper demonstrates the control parameter optimization using a hybrid Differential Evolution (DE) - Adaptive Neuro-Fuzzy Inference System (ANFIS) technique for permanent-magnet brushless DC (BLDC) motor drive system ensuring deadbeat response. The parameter settings are further used in adaptive current and speed controllers to attain the objective in a BLDC drive system. The parameters of both...
In this paper, robust adaptive control strategies are designed for Remotely Operated Vehicles (ROVs) with velocity constraints in the presence of uncertainties and disturbances. First, robust control strategies are investigated for ROVs, and then adaptive robust control strategies are further presented with online parameter estimation. To prevent the velocity constraint violation, the Barrier Lyapunov...
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