Discrete controller with state and disturbance estimation for robust performance of DC/DC Buck converter

This paper presents a novel direct form to design a digital robust control using RST structure (i.e., name given because of the R, S and T polynomials computed) based on convex optimization such as Chebyshev sphere; this approach was applied to a DC-DC Buck converter. This methodology takes into account parametric uncertainties and a Chebyshev sphere constraint in order to ensure robust performance and stability of the system in the discrete domain. For this purpose, a mathematical model for the DC-DC Buck converter is presented when considering uncertainties in electrical variables, such as load resistance, inductance, capacitance, and source voltage variation, also to obtain the discrete model of the system by using the bilinear transformation. The proposed methodology is compared with two other approaches designed in a discrete domain: the classical pole placement and the robust methodology based on the Kharitonov theorem. Wide-ranging experiments are performed in order to evaluate the behavior of the control methodologies when the system is subject to parametric variations of the load resistance and voltage setpoint variation. The results show that the proposed methodology outperforms the other approaches in 90% of the tests and ensures robust stability and robust performance when the system is subjected to a parametric uncertainties family.

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Discrete controller for high frequency buck converter

2013 International Conference on Circuits, Power and Computing Technologies (ICCPCT) ◽

10.1109/iccpct.2013.6528978 ◽

2013 ◽

Cited By ~ 1

Author(s):

P. Gayathiridevi ◽

S. Vijayalakshmi ◽

KR. Vairamani

Keyword(s):

High Frequency ◽

Buck Converter ◽

Discrete Controller

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Finite time state and disturbance estimation for robust performance of motion control systems using sliding modes

International Journal of Control ◽

10.1080/00207179.2017.1311026 ◽

2017 ◽

Vol 91 (5) ◽

pp. 1171-1182 ◽

Cited By ~ 4

Author(s):

Bhagyashri Tamhane ◽

Shailaja Kurode

Keyword(s):

Control Systems ◽

Motion Control ◽

Finite Time ◽

Sliding Modes ◽

Robust Performance ◽

Disturbance Estimation

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Development of Robust Discrete controller for Double Frequency Buck converter

Automatika ◽

10.7305/automatika.2015.12.647 ◽

2015 ◽

Vol 56 (3) ◽

pp. 303-317

Author(s):

Subramanian Vijayalakshmi ◽

Thangasamy Sree Renga Raja

Keyword(s):

Buck Converter ◽

Double Frequency ◽

Discrete Controller

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The Robust Performance Number: A New Tool for Control Structure Design

Computers & Chemical Engineering ◽

10.1016/s0098-1354(97)00083-5 ◽

1997 ◽

Vol 21 (1-2) ◽

pp. S409-S414 ◽

Cited By ~ 17

Author(s):

J Trierweiler

Keyword(s):

Control Structure ◽

Structure Design ◽

Robust Performance

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STABILISASI TEGANGAN KELUARAN BUCK CONVERTER DENGAN METODE FUZZY LOGIC CONTROLLER

JURNAL ELTEK ◽

10.33795/eltek.v16i2.104 ◽

2018 ◽

Vol 16 (2) ◽

pp. 125

Author(s):

Oktriza Melfazen

Keyword(s):

Fuzzy Logic ◽

Steady State ◽

Rise Time ◽

Fuzzy Logic Controller ◽

Buck Converter ◽

Settling Time

Buck converter idealnya mempunyai keluaran yang stabil, pemanfaatandaya rendah, mudah untuk diatur, antarmuka yang mudah dengan pirantiyang lain, ketahanan yang lebih tinggi terhadap perubahan kondisi alam.Beberapa teknik dikembangkan untuk memenuhi parameter buckconverter. Solusi paling logis untuk digunakan pada sistem ini adalahmetode kontrol digital.Penelitian ini menelaah uji performansi terhadap stabilitas tegangankeluaran buck converter yang dikontrol dengan Logika Fuzzy metodeMamdani. Rangkaian sistem terdiri dari sumber tegangan DC variable,sensor tegangan dan Buck Converter dengan beban resistif sebagaimasukan, mikrokontroler ATMega 8535 sebagai subsistem kontroldengan metode logika fuzzy dan LCD sebagai penampil keluaran.Dengan fungsi keanggotaan error, delta error dan keanggotaan keluaranmasing-masing sebanyak 5 bagian serta metode defuzzifikasi center ofgrafity (COG), didapat hasil rerata error 0,29% pada variable masukan18V–20V dan setpoint keluaran 15V, rise time (tr) = 0,14s ; settling time(ts) = 3,4s ; maximum over shoot (%OS) = 2,6 dan error steady state(ess) = 0,3.

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