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Showing papers in "Journal of research in engineering and applied sciences in 2022"


Journal ArticleDOI
TL;DR: This paper aims to present and discuss satellite tracking control system based on DC servo motor, and implies that the proposed (V-FOPID) controller is able to track the desired position precisely with the fastest settling time and free overshoot compared to other.
Abstract: Satellite tracking control system is a control unit which automatically steers the parabolic antenna to the desired satellite. It precisely traces the satellite as it Spins in its orbit across the sky. In order to maintain continuous communication signal during multiple satellite tracking missions, the tracking process must be very fast and smooth with minimum deviations from the desired position. Over time, various controller models have been proposed to tackle the problem of antenna pointing in satellite as well as to track moveable targets utilizing servomechanism. This paper aims to present and discuss satellite tracking control system based on DC servo motor. Particle Swarm Optimization (PSO), Adaptive Weighted Particle Swarm Optimization (AWPSO), Adaptive Acceleration Coefficients Particle Swarm Optimization (AACPSO), Modified Adaptive Accelerated Coefficients Particle Swarm Optimization (MAACPSO), Crazy Particle Swarm Optimization (C-PSO), Phasor Particle Swarm Optimization (PPSO),Gravitational Search Algorithm with Particle Swarm Optimization (GSA-PSO) and Eagle Strategy with Particle Swarm Optimization (ES-PSO) are proposed for optimal tuning of Proportional-Integral-Derivative (PID), Fuzzy PID (FPID), Variable Coefficient PID (V-PID), Fractional Order PID (FOPID) and Variable Coefficient Fractional Order PID (V-FOPID) controllers in satellite control system. Performance Index measured using Integral Based Objective Functions and Dynamic Performance Indices Based Objective Functions. Also, Self-Tuning Fuzzy PID (STF-PID) controller and Self-Tuning Fuzzy FOPID (STFFOPID) are proposed for satellite tracking control system. The system and control strategies designed and simulated in MATLAB & SIMULINK. The response of the system is analyzed, and the results of different control strategies are measured and compared with others. The obtained results implies that the proposed (V-FOPID) controller is able to track the desired position precisely with the fastest settling time and free overshoot compared to other


Journal ArticleDOI
TL;DR: A regression model is used in which the dependent variable is of qualitative type, more precisely, the variable: "the new individual who takes the entrance test is positive or negative", which is a classifier capable of diagnosing whether fingerprints will be accepted or not.
Abstract: The present work evaluates the performance of a fingerprint-based access control system to secure premises. In order to evaluate these performances, we used a regression model in which the dependent variable is of qualitative type, more precisely, the variable: "the new individual who takes the entrance test is positive or negative".Our model is therefore a classifier capable of diagnosing whether fingerprints will be accepted or not. This performance evaluation model is realized by means of the confusion matrix, the calculations of the evaluation parameters (Sensitivity, Specificity, Positive Predictive Value, Negative Predictive Value and False Negative), and finally the plots of the sensitivity values against 1-Specificity (ROC curve).On a sample of six hundred individuals of which 470 enrolled and 130 not enrolled, the access control system obtained the results of which 456 true positives, 14 false negatives, 10 false positives and 120 true negatives which constitute our confusion matrix, which we were able to evaluate the performance of our system by applying the calculations of the evaluation parameters.


Journal ArticleDOI
TL;DR: In this article , a flat delta wing with and without winglets at different angles of attack under low Reynolds numbers is analyzed and simulations are carried out to draw comparisons between the winglets on the basis of span-wise flow velocity vectors.
Abstract: Delta wing has numerous applications across aerospace vehicles. Highly inclined and variable swept back wings have a lot of added advantages in maneuverable fighter airplanes, supersonic cruise airliner; and modern unmanned aerial vehicles that have been equipped with and have deployed low swept back delta wings. Vortex flow across these delta wings is dominant for micro aerial vehicles and mini unmanned aerial vehicles flying at a low speed Reynolds number regime. Many experiments were carried out to study and analyze the aerodynamic flow parameters of delta wings wherein vortex sheet flow patterns were observed and studied at different angles of attack and flow parameters. In this paper we are plotting lift co-efficient and drag coefficient for a flat delta wing with and without winglets at different angles of attack under low Reynolds numbers. Furthermore, simulations are carried out to draw comparisons between the winglets on the basis of span-wise flow velocity vectors.

Journal ArticleDOI
TL;DR: In this paper, the effect of using Aluminium Foam (Alporas) on the ballistic resistance of multi-layer target comprising two steel layers and Al foam in between against rigid projectile of blunt nose impact at sub-ordnance velocities (320 : 400 m/s) is evaluated using finite element analysis using ABAQUS/explicit.
Abstract: In this paper, the effect of using Aluminium Foam (Alporas) on the ballistic resistance of multi layered target comprising two steel layers and Al foam in between against rigid projectile of blunt nose impact at sub-ordnance velocities (320 : 400 m/s) is evaluated using finite element analysis using ABAQUS/explicit. Rigid projectile of blunt nose is considered, it is manufactured from Arne tool steel with a nominal mass and diameter of 197 g and 20 mm. The evaluation has been done by comparing the ballistic resistance of a single layer of steel plate to eleven different composite plate structure comprising two layers of steel plates and Aluminium foam layer sandwiched between them. The study reveals that using Aluminium foam absorbs more kinetic energy from the projectile during penetration and, hence, reduces the residual velocity of the projectile. Also it is found that the total mass of each structure is less than the total mass of single layer target.



Journal ArticleDOI
TL;DR: In this paper , the transmittance of drinking water was measured using 2W LED light, Theremion_Spectrometer and diffraction grating to measure the transmissibility of water.
Abstract: To measure the transmittance of drinking water, 2W LED light, Theremion_Spectrometer and diffraction grating are used. The research area is Nisi located inBaglung district, Nepal. The observation is taken 9 sample of drinking water taken from different sources of Nisi. The observation shows that thetransmittance of drinking water taken from Kanabazer, Jiba Khola, Jiri, Jajir, Khahare Khola, Bhalu Khola and Nisi Khola is high. In addition, the absorbanceof drinking water taken from Khar Chowar is higher than other. The transmittance of the sample ranges from 32% to 100% while absorption coefficient0.034 × 102