Mohd Saifizi Saidon
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Mohd Saifizi Saidon
Official Name
Mohd Saifizi , Saidon
Alternative Name
Saidon, Mohd Saifizi
Saifizi Saidon, M.
Saifizi, M.
Saidon, M. S.
Saifizi, Mohd
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Scopus Author ID
56015096300
Researcher ID
AGY-2420-2022

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  • Publication
    Harmonic Elimination Simulation of Seven Level Cascaded H-Bridge Inverter Based on Newton Raphson Method
    ( 2022-01-01)
    Sulong M.M.S.
    ;
    Mohd Saifizi Saidon
    ;
    Mustafa W.A.
    ;
    Aihsan M.Z.
    Multilevel inverters for high-power applications are arising as the new breed of power converter options. Usually, they combine the waveform of the staircase voltage (from many dc sources) that has reduced the harmonic content. The selective harmonic elimination (SHE) by using Newton-Raphson method is proposed to apply for 350 W infrared dyer system. The analysis covers the scope for multilevel inverter single-phase cascaded H-bridge (CHB). The proposed SHE scheme is run using MATLAB/Simulink simulation. The results of these simulation is then compared to a 36 V output inverter hardware. The proposed SHE effectively removes the lowest-order harmonics and delivers a higher quality output waveform with a better harmonic profile.
  • Publication
    Black Box Modelling of Infrared Drying System for Herbs Dehydration
    ( 2022-01-01)
    Mohd Saifizi Saidon
    ;
    Sulong M.M.S.
    ;
    Mustafa W.A.
    ;
    Azmi A.I.
    ;
    Razak N.A.
    ;
    Fauzi M.F.
    This study focused on development of infrared dryer system for Orthosiphon Stamineus leaves drying application. In any food technology, the dryer is the key component for quality drying food and herbs etc. An oven is modified to produce high technology drying system. A mathematical model is developed based on time response characteristics of the system. A second order model is found to adequately represent the system as it gives best fit with better properties than the first order model with error between measured data and simulation data is 0.44. Validation procedures show that the derived model is indeed a good enough representation of drying system. The infrared dryer system is highly non-linear and exhibits varying model parameters. An identification system is introduced to estimate the parameters and determine mathematical model of the system. ARMAX of na = 2, nb = 1 and nc = 1 polynomial model show best fit to experimental response of PRBS input.
  • Publication
    Adaptive PD Controller Performance for Direct Cooling of Thermoelectric Refrigerator
    ( 2020-12-18)
    Mohd Saifizi Saidon
    ;
    Mohd Rizal Manan
    ;
    Baseemah Mat Jalaluddin
    ;
    Junaidah Ali Mohd Jobran
    ;
    Wan Azani Wan Mustafa
    ;
    Roejhan Md Kawi
    ;
    Lee T.W.
    ;
    Mat Piah M.S.
    ;
    Diana N.S.
    Refrigerator is the key component to keep the medicine and biological sample in the hospital. The domestic refrigerator has the problem of larger size and heavier weight since to the compact system like condenser, compressor, evaporator and expansion valve are assemble and using in the refrigerator. This project focused on design of temperature control of the portable thermoelectric refrigerator for medical purpose. Thermoelectric refrigerator is using the direct cooling method through thermoelectric module. Thermoelectric refrigerator has several advantages such as smaller size, lighter and silent when operated. Since maintain a constant temperature for the storage of medical product is important, a specific refrigerator is needed to ensure the medicine is stored in desired temperature. This project is to design and develop an adaptive control system which can perform a good temperature control for the thermoelectric refrigerator. The second order model is applied to design adaptive Proportional-Derivative (PD) controller. The selected controller is the adaptive PD controller because the performance of response shows 0.42 C of less steady state error and 0.21 C of lower undershoot. The adaptive PD control system designed able to let the refrigerator operate in different operating condition without influence the performance of the refrigerator.
  • Publication
    Automatic People Counting System Using Aerial Image Captured by Drone for Event Management
    ( 2021-01-01)
    Mohd Saifizi Saidon
    ;
    Wan Azani Wan Mustafa
    ;
    Rajasalavam V.R.
    ;
    Wan Khairunizam Wan Ahmad
    Event management refers to the ability to apply project management skills in order to initiate large scale social or business events. Hence, it requires the use of organizational as well as business management skills to envision, plan, and finally execute any such event. Therefore, to count or estimate the number of people who attend such events is one of important tool in event management. In common, counting number of people in events can be done by counting manually traditional headcount system. Nevertheless, this process or technique consumes much time and is also a difficult task to execute for a considerable number of people or a bigger crowd. Therefore, a modern counting system like automatic people counting system is developed to enhance the process of counting people. Thus, various method of counting has been proposed in the past decades. Consequently, automatic counting people using digital image processing technique is introduced to overcome this problem. Thus, to monitor or to count the number of people can be done by using Unmanned Aerial Vehicle (UAV) or drones. The use of drones can take a broader picture, saving time and becoming more efficient. For this research, the DJI Mavic Pro Drone is used to scout the areas. This paper is focusing on counting the number of people images. Thus, the images are firstly compared between RGB and HSV colour model. Then, the HSV colour model has been chosen for the thresholding process. Here, the images are compared between Otsu thresholding and manual thresholding. Both thresholding method gives a good segmentation result, but Otsu’s method is chosen because of its higher accuracy. Moreover, noise removal technique is employed in order to get good smoothing performance and produce better counting results. This paper is fully developed with MATLAB R2013a software. This technique has proven to be a good image processing technique with total accuracy of 91%. The hardware system is also developed to transmit the counting results.
  • Publication
    Malaria Parasite Diagnosis Using Computational Techniques: A Comprehensive Review
    ( 2021-12-01)
    Wan Azani Wan Mustafa
    ;
    Hiam Alquran
    ;
    Muhammad Zaid Aihsan
    ;
    Mohd Saifizi Saidon
    ;
    Wan Khairunizam Wan Ahmad
    ;
    Aimi Salihah Abdul Nasir
    ;
    Mohamed Mydin Hj M.Abdul Kader
    ;
    Midhat Nabil Ahmad Salimi
    ;
    Mohd Wafi Nasrudin
    Malaria is a very serious disease that caused by the transmitted of parasites through the bites of infected Anopheles mosquito. Malaria death cases can be reduced and prevented through early diagnosis and prompt treatment. A fast and easy-to-use method, with high performance is required to differentiate malaria from non-malarial fevers. Manual examination of blood smears is currently the gold standard, but it is time-consuming, labour-intensive, requires skilled microscopists and the sensitivity of the method depends heavily on the skills of the microscopist. Currently, microscopy-based diagnosis remains the most widely used approach for malaria diagnosis. The development of automated malaria detection techniques is still a field of interest. Automated detection is faster and high accuracy compared to the traditional technique using microscopy. This paper presents an exhaustive review of these studies and suggests a direction for future developments of the malaria detection techniques. This paper analysis of three popular computational approaches which is k-mean clustering, neural network, and morphological approach was presented. Based on overall performance, many research proposed based on the morphological approach in order to detect malaria.
  • Publication
    Comparative investigations on different types of inductors in single-phase inverter
    ( 2021-12-01)
    Muhammad Zaid Aihsan
    ;
    Ahmad Muhyiddin Yusof
    ;
    Hasliza A Rahim @ Samsuddin
    ;
    Baharuddin Ismail
    ;
    Wan Azani Wan Mustafa
    ;
    Mohd Saifizi Saidon
    ;
    Muhammad Izuan Fahmi Romli
    This article organized in two sections where it compares the performance of single-phase inverters using various types of inductors with differences modulation technique of pulse width modulation (PWM). Not all inductors perform the same function, even the inductance value is the same. The study will investigate the capability of each inductor on its performance to convert the unfiltered AC voltage into filtered sinusoidal AC voltage. The drum core and toroidal core inductors were used in this investigation. For both inductors, the performance will be analyzed based on Bipolar and Unipolar switching schemes in a single unit H-bridge circuit. The validation of results are through experimental assessment only and it will be evaluating the shape of sinusoidal AC voltage and the content of total harmonics distortion in the AC voltage for both inductors.
  • Publication
    Analysis of Symmetrical and Asymmetrical Multilevel Inverter using GWO Algorithm
    ( 2021-01-01)
    Muhammad Zaid Aihsan
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Mohd Saifizi Saidon
    ;
    Wan Azani Wan Mustafa
    ;
    Liew Hui Fang
    ;
    Alkhayyat A.
    ;
    Darghaoth A.M.H.
    This article presents a single-phase multilevel inverter with reduced switches technique to generate 9-level output voltage waveform during symmetric operation and 17-level output voltage waveform during asymmetric operation. The generation of firing angles for each power switches are tuned by using the Grey Wolf Optimization technique. The purpose of this study is to investigate the capability of the propose multilevel circuit on handling the different voltage injection to form the symmetrical and asymmetrical operation in a real hardware implementation. The proposed topology only used 10 units of power switches to from 17-level output voltage waveform compared to the conventional multilevel topology which requires 32 units of power switches. The reduction of power switches has significantly reduced the converter size as well as the power consumption for the controller and driver circuit. The feasibility of the proposed technique has been validated using MATLAB/Simulink software and through experimental results. The results will be focused on the harmonic performance and the amount of THD for asymmetrical is much lower compared to the symmetrical configuration.
  • Publication
    Total Harmonic Distortion Comparison Analysis between High-Power Density Inverter and Multilevel Inverter
    ( 2021-01-01)
    Khalid K.A.
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Liew Hui Fang
    ;
    Muhammad Zaid Aihsan
    ;
    Mohd Saifizi Saidon
    The inverter is one of the most common things in converting electrical energy supply and it is a very important concept in the current modern electrical power system to utilize the maximum potential by generating the unit while considering the environment within the surrounding area and avoid pollution is the most ideal concept of energy management. The main purpose of this study is to consider which one of the inverters is more suitable for energy saving. There are two kinds of inverter that have been tested for this research which are the High-power density inverter (HPDI) and Multilevel inverter (MLI). In High-power density inverter (HPDI) it uses electrical components such as Insulated-gate Bipolar Transistor (IGBT) as the main component. As for the Multilevel inverter (MLI) it uses electrical components Metal- oxide-semiconductor field-effect-transistor (MOSFET) as the main component. Both inverters are being implemented and running by using MATLAB Simulink software. Besides that, the result is obtained by comparing the Total Harmonic Distortion (THD), the output of the waveform and energy efficiency for both inverters.
  • Publication
    A review on VFD Control and Energy Management System of Induction Motor for Electric Vehicle
    ( 2021-01-01)
    Muhamad Akmal Aazmi
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Muhammad Zaid Aihsan
    ;
    Liew Hui Fang
    ;
    Mohd Saifizi Saidon
    This growing pattern of energy insufficiency will, of course, intensify in the future. According to the literature, variable frequency drives can save a lot of energy by changing the speed of the electrical motor mechanism (VFDs). The aim of these studies and analyses is to improve the efficiency of the electrical device system by using VFD control techniques. This paper outlines the principle of control mechanisms for induction motor drives, as well as their benefits and drawbacks. This paper is intended to serve as a one-stop shop for researchers interested in the topic. However, there appears to be no comprehensive review of Variable Frequency Drive (VFD) techniques for induction motor (IM) drives to resolve the need for a detailed insight into IM drives. Efficient control policies for induction motor drives provide a great opportunity for energy savings. As a result, research into the optimal operation of induction motor drives is escalating.
  • Publication
    Development and Design Humidity Controller for Hybrid Refrigerator System
    ( 2021-01-01)
    Mohd Saifizi Saidon
    ;
    Wan Azani Wan Mustafa
    ;
    Mohd Hanif Ismail
    ;
    Muzammil Jusoh
    This paper studies on control the humidity in the refrigerator for a vaccine. For the vaccine to be effective, it must be stored at a specific temperature for a vaccine to maintain its potency. The required range of temperature for vaccines is between +2 to +8ºC, while the relative humidity is 20 to 60%. The main problem is that vaccines are quickly diminished and cannot stay if they exposed to the extreme temperature and humidity from the range required. Nowadays, refrigerators are used to store vaccines in the hospital, and manufacturers are not able to control the humidity inside the refrigerator. Therefore, this paper aims to develop and design a humidity controller for a hybrid refrigerator system. This paper will consist of three main parts: integrate vapour refrigerator with thermoelectric, analysis of hybrid refrigerator characteristics, and design humidity controller. Based on the hybrid refrigerator response, the 10 to 50% duty cycyle of pulse width modulation (PWM) current is injected to maintain the desired temperature range. Among the controller tested, the value of PWM with a minimum of 20% to a maximum of 30% - this is deemed to be the most desirable range that would be able to maintain the desired humidity range. The thermoelectric used in this paper will be able to maintain temperature 5 ºC and also to control humidity as desired, which ranged from 20 to 60% to ensure that the vaccine performance would last longer.