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Parametric Faults Detection in Analog Circuits using Variable Ranking-based Feature Selection Method and Optimized SVM Model Cover

Parametric Faults Detection in Analog Circuits using Variable Ranking-based Feature Selection Method and Optimized SVM Model

By: G. Puvaneswari  
Open Access
|Apr 2025

Figures & Tables

Fig. 1.

Analog circuit fault diagnosis procedure.
Analog circuit fault diagnosis procedure.

Fig. 2.

Test node selection.
Test node selection.

Fig. 3.

SVM optimization.
SVM optimization.

Fig. 4.

Flowchart of exhaustive search.
Flowchart of exhaustive search.

Fig. 5.

Sallen key BPF.
Sallen key BPF.

Fig. 6.

Frequency response characteristics of BPF.
Frequency response characteristics of BPF.

Fig. 7.

BPF individual test node ranking.
BPF individual test node ranking.

Fig. 8.

BPF accuracy of classification single test node.
BPF accuracy of classification single test node.

Fig. 9.

BPF test node ranking.
BPF test node ranking.

Fig. 10.

BPF accuracy of classification - two test nodes.
BPF accuracy of classification - two test nodes.

Fig. 11.

State variable filter.
State variable filter.

Fig. 12.

Response of the LPF of the SVF.
Response of the LPF of the SVF.

Fig. 13.

Response of the HPF.
Response of the HPF.

Fig. 14.

Response of the BPF.
Response of the BPF.

Fig. 15.

SVF single test node ranking.
SVF single test node ranking.

Fig. 16.

SVF three test nodes ranking.
SVF three test nodes ranking.

Fig. 17.

SVF SVM classification accuracy.
SVF SVM classification accuracy.

SVM hyper parameters for BPF - single node testing_

Optimization methodFault detection accuracy
Hyper parameters
KernelAccuracy [%]
Random searchlinear65C = 100
rbf80C = 100, γ = 0.012
poly55C = 100, d = 2
sigmoid80C = 100, γ = 0.012

Bayesian search (number of iterations = 100)linear70C = 223.64
rbf80C = 63.65, γ = 1.82
poly75C = 6.01, d = 3
sigmoid75C = 338.98, γ = 0.575

PSO (number of iterations = 100, particle size = 10)linear65C = 412
rbf80C = 921.4, γ = 6.9
poly55C = 844.5, d = 2
sigmoid70C = 307.3, γ = 0.12

Exhaustive searchlinear65C = 100
rbf90C = 100, γ = 0.0127
poly70C = 1000, d = 2
sigmoid55C = 1000, γ = 0.1

SVF SVM hyper parameters - single node testing

Optimization methodFault detection accuracy
Hyper parameters
KernelAccuracy [%]
Random searchlinear22.22C = 4.4
rbf11.11C = 100, γ = 0.01
poly11.11C = 35.93, d = 2
sigmoid22.22C = 100, γ = 0.01

Bayesian search (number of iterations = 100)linear33.33C = 1.179
rbf16.67C = 3.08, γ = 0.243
poly5.56C = 74.63, d = 2
sigmoid16.67C = 1000, γ = 0.0013

PSO (number of iterations = 100, particle size = 10)linear22.22C = 887.42
rbf22.22C = 267, γ = 0.101
poly16.67C = 256, d = 2
sigmoid16.67C = 154.4, γ = 0.022

Exhaustive searchlinear22.22C = 100
rbf50C = 100, γ = 0.092
poly50C = 1000, d = 2
sigmoid22.22C = 1000, γ = 0.01

SVM hyper parameters for BPF_

Optimization methodFault detection accuracy
Hyper parameters
KernelAccuracy [%]
Random searchlinear95C = 100
rbf95C = 100, γ = 0.0085
poly65C = 100, d = 3
sigmoid80C = 100, γ = 0.0085

Bayesian search (number of iterations = 100)linear92C = 1000
rbf95C = 1.913, γ = 0.9
poly90C = 86.32, d = 3
sigmoid90C = 1000, γ = 0.0417

PSO (number of iterations = 100, particle size = 10)linear96C = 831
rbf95C = 200.42, γ = 6.2
poly95C = 256, d = 3
sigmoid85C = 218.57, γ = 0.111

Exhaustive searchlinear100C = 1000
rbf100C = 1000, γ = 0.00857
poly95C = 1000, d = 2
sigmoid45C = 1000, γ = 0.1

SVF SVM hyper parameters_

Optimization methodFault detection accuracy
Hyper parameters
KernelAccuracy [%]
Random searchlinear22.22C = 12.9
rbf50C = 100, γ = 0.034
poly27.78C = 100, d = 2
sigmoid27.78C = 100, γ = 0.01

Bayesian search (number of iterations = 100)linear55.6C = 157.8
rbf66.67C = 1000, γ = 0.207
poly66.67C = 1000, d = 3
sigmoid44.44C = 769.83, γ = 0.0086

PSO (number of iterations = 100, particle size = 10)linear50C = 191.37
rbf50C = 267.13, γ = 0.172
poly37C = 152, d = 3
sigmoid27.78C = 261.3, γ = 0.0158

Exhaustive searchlinear88C = 100
rbf90C = 1000, γ = 0.046
poly89C = 1000, d = 3
sigmoid28C = 1000, γ = 0.01
Language: English
Page range: 30 - 39
Submitted on: Feb 24, 2024
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Accepted on: Mar 18, 2025
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Published on: Apr 15, 2025
In partnership with: Paradigm Publishing Services
Publication frequency: Volume open

© 2025 G. Puvaneswari, published by Slovak Academy of Sciences, Institute of Measurement Science
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.