Adaptive Nonlinear Control of A Synchronous Generator

Abstract In this work, an adaptive nonlinear control method, was applied to a synchronous generator and we give some initial results on the adaptive control of nonlinear systems which are exactly input-output linearizable by state feedback. Parameters adaptation is used as a technique to robustify the exact cancelation of nonlinear terms, which is called for the linearization technique. The performance of the proposed adaptive nonlinear control scheme is demonstrated by simulation results. These results show that the proposed method achieves the same high dynamic performance as vector control.

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A Fuzzy Adaptive Nonlinear Control for an Asynchronous Machine

Carpathian Journal of Electronic and Computer Engineering ◽

10.2478/cjece-2019-0004 ◽

2019 ◽

Vol 12 (1) ◽

pp. 17-22

Author(s):

Moulay Fatima ◽

Habbatti Assia ◽

Hamdaoui Habib

Keyword(s):

Adaptive Control ◽

Nonlinear Control ◽

Control Method ◽

Dynamic Performance ◽

General Concept ◽

Nonlinear Adaptive Control ◽

Asynchronous Machine ◽

Linearization Technique ◽

Control Scheme ◽

Adaptive Fuzzy Logic

Abstract This paper presents the general concept of the nonlinear control of the asynchronous machine. The decoupling between the flux and the speed is realized by the input-output linearization technique. In this work, a nonlinear adaptive control method has been applied to the asynchronous machine and we give some initial results on the adaptive fuzzy logic control of nonlinear systems, linearized by state feedback. The adaptations of the parameters are used as a technique for robustifying the exact cancellation of the nonlinear terms, which is called for the linearization technique. The performance of the proposed nonlinear adaptive control scheme is demonstrated by simulation results. These results show that the proposed method achieves the desired dynamic performance.

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Antidisturbance Control for Helicopter Stochastic Systems

Mathematical Problems in Engineering ◽

10.1155/2021/6980715 ◽

2021 ◽

Vol 2021 ◽

pp. 1-28

Author(s):

Dongping Li ◽

Yankai Li

Keyword(s):

Nonlinear Control ◽

Stochastic Systems ◽

Control Method ◽

Stochastic Theory ◽

Nonlinear Controller ◽

Closed Loop System ◽

Nonlinear Disturbance Observer ◽

Control Techniques ◽

Control Scheme ◽

Nonlinear Control Method

In this paper, an antidisturbance controller is presented for helicopter stochastic systems under disturbances. To enhance the antidisturbance abilities, the nonlinear disturbance observer method is applied to reject the time-varying disturbances. Then, the antidisturbance nonlinear controller is designed by combining the backstepping control scheme. And the stochastic theory is used to guarantee that the closed-loop system is asymptotically bounded in mean square while the proposed control method is shown via some traditional nonlinear control techniques, which still show some common issues such as “dimension explosion” or others. The result of this paper can be regarded as a typical case of the nonlinear control method to help and promote the generation of advanced methods.

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A nonlinear control method for good dynamic performance elastic drives

IEEE Transactions on Industrial Electronics ◽

10.1109/tie.1999.778264 ◽

1999 ◽

Vol 46 (4) ◽

pp. 868-870 ◽

Cited By ~ 2

Author(s):

R. Dhaouadi ◽

K. Kubo

Keyword(s):

Nonlinear Control ◽

Control Method ◽

Dynamic Performance ◽

Nonlinear Control Method

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Design and Nonlinear Control of a 2-DOF Flexible Parallel Humanoid Arm Joint Robot

Shock and Vibration ◽

10.1155/2017/2762169 ◽

2017 ◽

Vol 2017 ◽

pp. 1-14 ◽

Cited By ~ 3

Author(s):

Leijie Jiang ◽

Bingtuan Gao ◽

Zhenyu Zhu

Keyword(s):

Nonlinear Control ◽

Shoulder Joint ◽

Control Method ◽

Parallel Robot ◽

Control Scheme ◽

Flexible Parts ◽

Parallel Robot Platform ◽

Flexible Deformation ◽

Nonlinear Control Method ◽

Robot Platform

The paper focuses on the design and nonlinear control of the humanoid wrist/shoulder joint based on the cable-driven parallel mechanism which can realize roll and pitch movement. In view of the existence of the flexible parts in the mechanism, it is necessary to solve the vibration control of the flexible wrist/shoulder joint. In this paper, a cable-driven parallel robot platform is developed for the experiment study of the humanoid wrist/shoulder joint. And the dynamic model of the mechanism is formulated by using the coupling theory of the flexible body’s large global motion and small flexible deformation. Based on derived dynamics, antivibration control of the joint robot is studied with a nonlinear control method. Finally, simulations and experiments were performed to validate the feasibility of the developed parallel robot prototype and the proposed control scheme.

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Bidirectional Power Sharing for DC Microgrid Enabled by Dual Active Bridge DC-DC Converter

Energies ◽

10.3390/en14020404 ◽

2021 ◽

Vol 14 (2) ◽

pp. 404

Author(s):

Sara J. Ríos ◽

Daniel J. Pagano ◽

Kevin E. Lucas

Keyword(s):

Power Management ◽

Distribution Systems ◽

Control Method ◽

Dynamic Performance ◽

Management Control ◽

Photovoltaic System ◽

Dc Microgrid ◽

Dual Active Bridge ◽

Control Scheme ◽

Bidirectional Power Flow

Currently, high-performance power conversion requirements are of increasing interest in microgrid applications. In fact, isolated bidirectional dc-dc converters are widely used in modern dc distribution systems. The dual active bridge (DAB) dc-dc converter is identified as one of the most promising converter topology for the mentioned applications, due to its benefits of high power density, electrical isolation, bidirectional power flow, zero-voltage switching, and symmetrical structure. This study presents a power management control scheme in order to ensure the power balance of a dc microgrid in stand-alone operation, where the renewable energy source (RES) and the battery energy storage (BES) unit are interfaced by DAB converters. The power management algorithm, as introduced in this work, selects the proper operation of the RES system and BES system, based on load/generation power and state-of-charge of the battery conditions. Moreover, a nonlinear robust control strategy is proposed when the DAB converters are in voltage-mode-control in order to enhance the dynamic performance and robustness of the common dc-bus voltage, in addition to overcoming the instability problems that are caused by constant power loads and the dynamic interactions of power electronic converters. The simulation platform is developed in MATLAB/Simulink, where a photovoltaic system and battery system are selected as the typical RES and BES, respectively. Assessments on the performance of the proposed control scheme are conducted. Comparisons with the other control method are also provided.

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