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PID fuzzy control applied to an electrosurgical unit for power regulation

Journal of Electrical Bioimpedance
Volume 11 (2020): Issue 1 (January 2020)
By:
Open Access
|Oct 2020

Figures & Tables

Fig.1

Mono-polar ESU Modes.
Mono-polar ESU Modes.

Fig.2

Bi-polar ESU Modes.
Bi-polar ESU Modes.

Fig.3

Block diagram of the proposed ESU.
Block diagram of the proposed ESU.

Fig.4

Equivalent electric circuit of a biological tissue.
Equivalent electric circuit of a biological tissue.

Fig.5

PID-ZNS controller for the proposed ESU.
PID-ZNS controller for the proposed ESU.

Fig.6

FLC-PID controller for the proposed ESU.
FLC-PID controller for the proposed ESU.

Fig.7

Buck converter for proposed ESU.
Buck converter for proposed ESU.

Fig.8

High-frequency inverter for the proposed ESU.
High-frequency inverter for the proposed ESU.

Fig.9

ESU output RMS voltage for original controller.
ESU output RMS voltage for original controller.

Fig.10

RMS output voltage for proposed ESU with PID-ZNS and FLC-PID controller.
RMS output voltage for proposed ESU with PID-ZNS and FLC-PID controller.

Fig.11

ESU output RMS current for the original controller.
ESU output RMS current for the original controller.

Fig.12

RMS output current for the proposed ESU with PID-ZNS and FLC-PID controller.
RMS output current for the proposed ESU with PID-ZNS and FLC-PID controller.

Fig.13

ESU output power for the original controller.
ESU output power for the original controller.

Fig.14

Output power for the proposed ESU with PID-ZNS and FLCPID controller.
Output power for the proposed ESU with PID-ZNS and FLCPID controller.

Fig.15

Power signal for the proposed ESU with PID-ZNS and FLCPID controller (Zoomed).
Power signal for the proposed ESU with PID-ZNS and FLCPID controller (Zoomed).

Simulation specifications of the proposed ESU_

Description SymbolValue, Unit
Source Voltage24 V
Buck Converter
L33 μH
C220 μF
Switching frequency500 kHz
Tissue Impedance
1st layer, Z190 Ω
2nd layer, Z260 Ω
3rd layer, Z330 Ω
Zmin130 Ω
PID Parameters
kpZNS method0.0102
ki13.16
kd1.98e-6
kprefFLC method0.0102
kiref13.16
kdref1.98e-6
kpnew0.0114
kinew13.197
kdnew2.005e-6
Power Reference50 W
High-Frequency Transformer
L140 μH
L20.1 μH
L30.1 μH

Summary of results_

Performance criteriaOriginal ControllerPID-ZNSPID-FLC
Power increasing36.20%17.00%10.00%
OS% of voltage0.34%3.70%2.07%
OS% of current0.93%4.26%2.22%
OS% of Power0.80%7.60%4.20%
STD of voltage3.38%3.85%3.04%
STD of current3.72%4.51%3.39%
STD of Power36.40%18.00%10.60%
Tr of voltage0.37 ms0.9 ms0.89 ms
Tr of current0.37 ms0.9 ms0.89 ms
Tr of power0.37 ms0.9 ms0.89 ms
Ts of voltageunstable2.4 ms2.1 ms
Ts of currentunstable2.4 ms2.1 ms
Ts of powerunstable2.4 ms2.1 ms
(Z1 to Z2) period (0–0.01) sec
Performance criteriaPID-ZNSPID-FLC
Power increasing7.60%4.20%
OS% of voltage3.70%2.07%
OS% of current4.26%2.22%
(Z2 to Z3) period (0.01–0.02) sec
Performance criteriaPID-ZNSPID-FLC
Power increasing14.00%9.00%
OS% of voltage3.34%3.15%
OS% of current7.08%7.08%
(Z3) period (0.02–0.03) sec
Performance criteriaPID-ZNSPID-FLC
Power increasing17.00%10.00%
OS% of voltage3.45%3.25%
OS% of current9.00%8.53%
DOI: https://doi.org/10.2478/joeb-2020-0011 | Journal eISSN: 1891-5469
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Language: English
Page range: 72 - 80
Submitted on: Jul 28, 2020
Published on: Oct 24, 2020
Published by: University of Oslo
In partnership with: Paradigm Publishing Services
Publication frequency: 1 times per year
Keywords:
Electrosurgical unit,
tissue burning,
tissue impedance,
boost converter,
high-frequency inverter
Related subjects:
Engineering,
Bioengineering and biomedical engineering,
Biomedical electronics,
Life sciences,
Biophysics,
Medicine,
Biomedical engineering,
Physics,
Spectroscopy and metrology

© 2020 Ali Mohammed Ridha, Ali Jafer Mahdi, Jameel Kadhim Abed, Shah Fahad, published by University of Oslo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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