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70 articles
61
Research Article DOI: 10.67203/zjeet.2019.bpk45vih

MODULAR MULTILEVEL CONVERTER WITH HARMONICS COMPENSATION FOR STATE-FEEDBACK CONTROLLER

A. U,Lawan*, Abubakar Abdulkarim, I.S Madugu, Abdullahi Bala Kunya, G.S. Shehu

The voltage variations among the sub-module (SM) capacitors result in harmonicssuperimposed unto the circulating current. The conventional control of the SM voltages usesa closed-loop proportional Integral (PI) controller based on carrier shifted pulse widthmodulation (CSPWM). The PI-controller provides a dc reference circulating current for thecontrol of the modular multilevel converter (MMC) mea...

Sep, 2019 pp. 96-104 16 views 13 downloads
62
Research Article DOI: 10.67203/zjeet.2020.extz5jzd

DEVELOPMENT OF AN AUTONOMOUS VACUUM CLEANER ROBOT

U. Y. Bagaye*, K. A. Abubilal, A. D. Usman

This paper presented an autonomous vacuum cleaning robot with capability for obstacleavoidance. The system design involved augmenting s number of mechanical and electroniccomponents ranging from voltage regulators, motors, sensors, driver circuits, vacuumpump, microcontrollers amongst others). The system was designed for low powerconsumption. HC-SR04 ultrasonic sensors were employed to detect obst...

Sep, 2020 pp. 97-106 12 views 6 downloads
63
Research Article DOI: 10.67203/zjeet.2021.2d5lnxrb

DEVELOPMENT OF AN IMPROVEDARTIFICIAL BEE COLONY BASEDCOORDINATION SCHEME FOR DIRECTIONAL OVERCURRENT RELAY IN DISTRIBUTION NETWORKS

A. J Akinbobola*, Boyi Jimoh, Y. Jibril, C.O Okonkwo, K.O. Iyapo

A modified Directional Over-Current Relay (DOCR) operational time characteristic equation has been developed by introducing two new parameters (load current ratio and fault/load voltage ratio) into the conventional operational time characteristic equation to ensure flexibility while still retaining the necessary property of the original equation. An Improved Artificial Bee Colony (IABC) optimizati...

Sep, 2021 pp. 102-114 22 views 15 downloads
64
Research Article DOI: 10.67203/zjeet.2019.otejnm1d

DEVELOPMENT OF AN EFFICIENT WIRELESS POWER TRANSFER AND CHARGING SYSTEM (500MHZ – 900MHZ)

Abdoulie M. S. Tekanyi*, Emmanuel Chinda Francis, Aminu Muhammad Abba

Strong coupled magnetic resonance Wireless Power Transfer (WPT) proposed byresearchers at Qi IEEE conf. in 2007 attracted the world’s attention by virtue of itsmid-range, non- radioactive, and high-efficiency power transfer. In this article,current developments and research progress in the technology of WPT arepresented. Advantage of WPT are analysed by comparing it with other WPTtechnologies and ...

Sep, 2019 pp. 105-111 10 views 6 downloads
65
Research Article DOI: 10.67203/zjeet.2019.4ajoj4zq

IMPACT OF NUMBER OF CHANNELS ON THE CAPACITY OF SINGLE AND MULTI-CHANNEL WIRELESS NETWORKS

S. A. Babale*, D. D. Dajab, S. H. Lawan, L. U. Daura, S. G. Mohammed

Radio Frequency (RF) suffers lot of impairments and perturbations resulting in counterssuch as call drops rate, failure rate and congestion rate on one hand and beam-width, fading,shadowing and attenuation on the other hand. These factors seriously affect systemscapacity. To combat the effect of these impairments on the signal, the information can betransmitted via multiple channels by deploying m...

Sep, 2019 pp. 112-118 15 views 5 downloads
66
Research Article DOI: 10.67203/zjeet.2021.csx0csrw

DEVELOPMENT OF AN IMPROVED PILOT DECONTAMINATION SCHEME USING ORTHOGONAL UPLINK PILOT SEQUENCE BASED ON LARGE SCALE FADING MASSIVE MIMO SYSTEMS

S. M. Atiku*, Abdoulie M. S. Tekanyi, K. A. Abubilal, H. A. Abdulkareem, U. F. Abdu-Ague

Pilot contamination (PC) is the major challenge in Massive Multiple Input Multiple Output (M-MIMO) systems of work of previous researchers because it reduces the achievement of numerous benefits of the M-MIMO system. In this proposed scheme, users are classified into center cell and edge cell users based on their large-scale fading. The center cell users suffer less or no interference which not th...

Sep, 2021 pp. 115-123 10 views 5 downloads
67
Research Article DOI: 10.67203/zjeet.2019.w5qvpc0i

A CONCEPTUAL FRAMEWORK FOR PRACTICAL IMPLEMENTATION OF LI-FI FOR V2V VANET COMMUNICATION

H. Bello-Salau*, A. J. Onumanyi, B. Yahaya, A. M. Aibinu, Z. Attah, M. O. Momoh

The emergence of light fidelity (Li-Fi) has revolutionized the way information are sent froma source to destination. Despite the expensiveness of Li-Fi, it still found application in mosttime critical information transmission between a source and destination due to its fastness.Consequently, this paper presents a Li-Fi mimic approach for communicating sensed roadanomalies among vehicles in a Vehic...

Sep, 2019 pp. 119-125 11 views 9 downloads
68
Research Article DOI: 10.67203/zjeet.2020.0c8nl6ww

ANALYTICAL ESTIMATION OF FLOW INDUCED VIBRATION IN PIN-PIN SUPPORTED PIPLELINE AND ITS ASSESSMENT AS BASE EXCITATION SIGNAL FOR A POWER HARVESTER

B. Usman*

This work estimates analytically, the vibration induced in a simply supported pipeline with fluid flow,and assesses the vibration for its adequacy as base excitation signal for power harvestingtransducer. The work is based on the model of the fourth order Partial and Ordinary DifferentialEquations without its Coriolis component. The Algorithms for the analytical solution of the FIVmodels are devel...

Sep, 2020 pp. 122-131 14 views 4 downloads
69
Research Article DOI: 10.67203/zjeet.2020.4wnxx1ue

ANALYSIS OF LMS DALTONIZATION ALGORITHM FOR ADJUSTING IMAGE COLOR FOR DEUTERANOPIA

Aisha Badamasi Muhammad*, Ja’afar Zubairu Maitama, Amir Bature, Zainab Yunusa

Color Blindness is a vision deficiency that leads to missing out of some colors present in animage or video. This in turn affects the lives (both personal and professional) of peoplesuffering from it. In order to limit or solve color blindness problems, digital imageprocessing algorithms for adjusting image color have been proposed in the literature.Amongst the most prevalent, RGB color contrastin...

Sep, 2020 pp. 128-134 16 views 4 downloads
70
Research Article DOI: 10.67203/zjeet.2020.aefwx09o

TRAJECTORY PLANNING FOR A MOBILE AGENT USING METAHEURISTICS ALGORITHMS

M. L. Imam*, I. F. Egbujo, P. J. Nyabvo, K. Z. Cinfwat, I. S. Momoh, E. K. Akut

This paper presents an optimal path planning technique for a mobile robot in a dynamicenvironment. One of the major problems in robotics engineering is motion planning. Sincerobots are not intelligent and have no intelligent means of perceiving its environment, itusually fundamental to develop an obstacle free path capable of guiding the robot from agoal point to a target point. Therefore, this pa...

Sep, 2020 pp. 135-138 14 views 7 downloads