Sensorless Robust Controller for Buck Converter using Modified Fast Terminal Sliding Surface

2021 ◽  
Author(s):  
Prabhakar Holambe ◽  
Sanjay Dambhare
Keyword(s):  
Buck Converter ◽  
Sliding Surface ◽  
Robust Controller ◽  
Terminal Sliding Surface

scholarly journals Research on trajectory tracking control of manipulator based on modified terminal sliding mode with double power reaching law

2019 ◽  
Vol 16 (3) ◽  
pp. 172988141984789 ◽  
Author(s):  
Yan Xia ◽  
Wei Xie ◽  
Jiachen Ma
Keyword(s):  
Control Strategy ◽  
Finite Time ◽  
Sliding Mode ◽  
Practical Implementation ◽  
Sliding Surface ◽  
Initial State ◽  
Trajectory Tracking Control ◽  
Terminal Sliding Mode ◽  
Reaching Law ◽  
Terminal Sliding Surface

This article proposes a control strategy that combines the double power reaching law with the modified terminal sliding mode for tracking tasks of rigid robotic manipulators quickly and accurately. As a significant novelty, double power reaching law can reach the sliding surface in finite time when the system is in any initial state. At the same time, modified terminal sliding surface guarantees the system that position and velocity error converge to be zero approximately. In other words, the control law is able to make the system slip to the equilibrium point in a finite time and improves the speed of the system approaching and sliding modes. The simulation results demonstrate the practical implementation of the control strategy, verify its robustness of more accurate tracking and faster disturbance rejection, and weaken the chattering phenomenon more effectively compared with the conventional terminal sliding mode controller.

scholarly journals EXPERIMENTAL ASSESSMENT OF A ROBUST CONTROLLER DESIGN VIA INTERVAL ANALYSIS APPLIED TO A DC-DC BUCK CONVERTER

2018 ◽  
Vol 23 (3) ◽  
pp. 1-11
Author(s):  
Renan Landau Paiva de Medeiros ◽  
Duaymy Bruno Rodrigues Góes ◽  
Florindo Antônio de Carvalho Ayres Junior ◽  
Walter Barra Junior ◽  
Cleonor Crescêncio das Neves ◽  
...  
Keyword(s):  
Interval Analysis ◽  
Controller Design ◽  
Buck Converter ◽  
Robust Controller ◽  
Experimental Assessment ◽  
Robust Controller Design

scholarly journals Synchronization of Two Fractional-Order Chaotic Systems via Nonsingular Terminal Fuzzy Sliding Mode Control

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Xiaona Song ◽  
Shuai Song ◽  
Ines Tejado Balsera ◽  
Leipo Liu ◽  
Lei Zhang
Keyword(s):  
Sliding Mode Control ◽  
Fractional Order ◽  
Finite Time ◽  
Chaotic Systems ◽  
Sliding Mode ◽  
Sliding Surface ◽  
Fuzzy Sliding Mode Control ◽  
Mode Control ◽  
Fuzzy Sliding Mode ◽  
Terminal Sliding Surface

The synchronization of two fractional-order complex chaotic systems is discussed in this paper. The parameter uncertainty and external disturbance are included in the system model, and the synchronization of the considered chaotic systems is implemented based on the finite-time concept. First, a novel fractional-order nonsingular terminal sliding surface which is suitable for the considered fractional-order systems is proposed. It is proven that once the state trajectories of the system reach the proposed sliding surface they will converge to the origin within a given finite time. Second, in terms of the established nonsingular terminal sliding surface, combining the fuzzy control and the sliding mode control schemes, a novel robust single fuzzy sliding mode control law is introduced, which can force the closed-loop dynamic error system trajectories to reach the sliding surface over a finite time. Finally, using the fractional Lyapunov stability theorem, the stability of the proposed method is proven. The proposed method is implemented for synchronization of two fractional-order Genesio-Tesi chaotic systems with uncertain parameters and external disturbances to verify the effectiveness of the proposed fractional-order nonsingular terminal fuzzy sliding mode controller.

Robust Controller of Buck Converter Feeding Constant Power Load

2020 ◽  
Vol 32 (1) ◽  
pp. 153-164
Author(s):  
Mahmoud S. Ali ◽  
M. Soliman ◽  
Ahmed M. Hussein ◽  
Said A. F. Hawash
Keyword(s):  
Buck Converter ◽  
Robust Controller ◽  
Constant Power ◽  
Power Load ◽  
Constant Power Load

scholarly journals Design of Optimal QFT Controller and Prefilter for Buck Converter Using Metaheuristic Algorithms

2018 ◽  
Vol 2018 ◽  
pp. 1-17
Author(s):  
Nitish Katal ◽  
Shiv Narayan
Keyword(s):  
Input Voltage ◽  
Industrial Applications ◽  
Single Step ◽  
Buck Converter ◽  
Controller Synthesis ◽  
Metaheuristic Algorithms ◽  
Robust Controller ◽  
Switching Regulator ◽  
Optimal Gains ◽  
A Current

A buck converter is a step-down switching regulator. Buck convertors are being widely used in industrial applications that rely on regulated output voltage under fluctuating input voltage. A buck convertor works in the following modes: (a) current-controlled or (b) voltage-controlled mode. But these convertors manifest several nonlinearites because of the switching operation. Hence, in order to generate a quality output of the convertor, the design of a controller becomes crucial. In this paper, the synthesis of a QFT-based robust controller and prefilter has been carried out for an uncertain buck converter with varying input voltage and varying load. The controller synthesis problem has been posed as an optimization problem, and metaheuristic algorithms have been used for obtaining the optimal gains for the QFT controller and prefilter. By doing this, the QFT synthesis can be carried out in a single step instead of following the sequential classical QFT process on Nichols charts and the need for the generation of templates and bounds has be eliminated. The designed 2-degree-of-freedom QFT control system offers a robust behavior and efficiently handles the parametric uncertainties. The robustness of the designed controller has been confirmed through simulation results for large input voltage and load fluctuations.

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