Genetic Algorithm-Based Parametrization of a PI Controller for DC Motor Control

Abstract

This paper analyses the application of a genetic algorithm (GA) for the purpose of designing the control system with separately excited DC motor controlled according to the rotor angle. The presented research is based on the utilization of a mathematical model designed with separate electrical and mechanical sub-systems. Such an approach allows fine-tuning of PID controllers by using an evolutionary procedure, mainly GA. For purpose of PID tuning, the new fitness function which combines several step response parameters with the aim of forming a unique surface which is then minimized with a genetic algorithm. From the results, it can be seen that the elitism-based algorithm achieved better results compared to the eligibility-based selection. Such an algorithm achieved a fitness value of 0.999982 resulting in a steady-state error of 0.000584 rad. The obtained results indicate the possibility of applying a GA in the parameterization of the PID controller for DC motor control.

Bioinformatics and Patient Survival Analysis of Digestive Tract Tumor Marker NCAPG Based on Public Medical Databases

“…Therefore, searching for novel biomarkers that acts as key molecules andtargetsinthedevelopmentofgastrointestinaltumorscanprovidesuggestionsfordetermining treatmentplansandpredictingprognosis,furtherexplorenewdrugtargets,andprovidetheoreticaland experimentalbasesforthedevelopmentoftargetedtherapies (Jageretal.,2000;García-Barrios,2021). The NCAPG protein is one of the subunits of the concentrate I complex of mitogen-associated chromosomalproteinconcentrateandisinvolvedintheconcentrationandstabilizationofmitosisand meiosis (Lam,Peterson,Yeung,&Lavoie,2006).StudiesshowedthattheNCAPGproteinaffectsa varietyofhumantumors (Panetal.,2019).Inaddition,theknockdownofNCAPGexpressioncan promotecellapoptosisandreducecellmigrationabilityandissignificantlycorrelatedwithprognosis (Arai et al, 2018;Mavrinac, M.,2022), thus becoming a tumor marker for liver cancer, thyroid cancer,andmanyothertumordiseases (Panetal.,2019;Zhangetal.,2018;Sanchez-Carmona,2021). However,theexpressionandimportanceoftheNCAPGproteiningastrointestinaltumorshavenot beenfullyrecognized.…”