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
    The ARX and ARMAX Models for thermoelectric cooling on glass windows: A Comparative study
    ( 2022-01-01)
    Mohd Saifizi Saidon
    ;
    Nasrul Amri Mohd Amin
    ;
    Aqilah Che Sulaiman
    ;
    Mohd Rizal Manan
    ;
    Siti Marhainis Othman
    ;
    Wan Azani Wan Mustafa
    ;
    Wahab N.A.
    Thermoelectric cooling (TEC), in particular, can be combined with a heat sink for local cooling, but they can also be integrated into electronic chips for point-to-point cooling. The study aims to develop a dynamic model of a cooling system integrated with TEC for glass window. The main target of this study is to develop a dynamic model of a cooling system integrated with TEC. The black box modelling approach in producing a mathematical model was selected based on the ARMAX and ARX model that corresponds to the actual dynamic state of the cooling system. The best model was finalized based on the best match on curve patterns when comparing the real and estimated models using the system identification tools in MATLAB, and also having the least error. The accuracy of the models was compared and analysed. The results showed that the 4th order of the ARMAX model produced a higher best fitting and standard deviation values of 80.23% and 0.027592 compared to the 4th order of the ARX model of 78.14% and 0.030769 respectively. This system accuracy is almost within the acceptable range for most error calculations in the validation method. Yet, this cooling system integrated with TEC is found more suitable for the 4th order of the ARMAX model when compared to the ARX model due to the noise parameter in the ARMAX model. Nevertheless, the noise order in this system is not dominant, therefore, whenever the noise order of the system in the ARMAX model is high than the second structure (nb), the number of errors is also high. In addition, the ARMAX model is found incapable of achieving the highest fitting due to the losses from the dynamic environment and losses from the TEC itself. Still, the use of this black box model used in this study is a significant variation where system parameters can be identified even offline.
  • Publication
    Identification of ARX Model for Thermoelectric Cooling on Glass Windows
    ( 2022-01-01)
    Mohd Saifizi Saidon
    ;
    Nasrul Amri Mohd Amin
    ;
    ‘Aqilah Che Sulaiman
    ;
    Mohd Rizal Manan
    ;
    Siti Marhainis Othman
    ;
    Wan Azani Wan Mustafa
    ;
    Arith F.
    Thermoelectric cooling (TEC) is a solid-state heat pump that uses the Peltier effect to dissipate the heat generated by the electronic packaging system. TECs are widely used in aerospace, military, scientific work and industry due to small size, lack of moving parts, and ease of integration. In this study, a cooling system integrated with TEC is developed in a testing area (lecturer’s office) with the aim to reduce the temperature of the hot glass window area due to solar radiation that passes through it. This cooling system used direct TEC, for keeping the cooling temperature on the window to about 26 °C which is equivalent to an air conditioning setting temperature of 26 °C set during the experiment. This work includes experimental and modelling studies conducted on cooling systems integrated with TEC. The main target of this study is to develop a dynamic model of a cooling system integrated with TEC. The black box modelling approach in producing a mathematical model was selected based on the ARX model that corresponds to the actual dynamic state of the cooling system. The best model was finalized based on the best match on curve patterns when comparing the real and estimated models using the system identification tools in MATLAB, and also had the least error. The accuracy of the models was compared and analysed. The results showed that the 4th order of the ARX model produced a higher best fitting and standard deviation values of 78.14% and 0.030769. This system accuracy is almost within the acceptable range for most error calculations in the validation method. In addition, the ARX model is found incapable of achieving the highest fitting due to the losses from the dynamic environment and losses from the TEC itself. Still, the use of this black box model used in this study is a significant variation where system parameters can be identified even offline.
  • Publication
    Development of fuzzy pid cascade control system for differential-drive wheeled mobile robot
    ( 2012)
    Mohd Saifizi Saidon
    This study focuses on the control systems implementations of an intelligent autonomous mobile robot called Mobile Autonomous Robot (MAR). The robot is targeted for indoor usage, assume the role of a guide or security personnel in factories, warehouses, museums and offices. It has two driving wheels powered by two independent motors for drive and steering respectively. Each DC motor is controlled by a pulse width modulation (PWM) motor controller. A cascade control system has been implemented to control the movement of the robot, and this consists of a master controller and two slave controllers for each DC motor. The master controller is a Fuzzy Logic Controller (FLC) which computes the required speed and angular speed needed by the two motors. A vision system is used as the sensor for the robot motion. Fuzzy logic is applied to generate target trajectory movement with the information extracted from vision system such as the distance of target and the orientation of target. The landmark selected is a door because the door is a very common objects in indoor environments and the detection of a door allows a robot to do tasks such as navigation and path planning. This work presents an approach using computer vision which applies Hough Transform and Feature Matching technique after the image has been process using Canny edge detector. The two slave controllers are Proportional-Integral-Derivative (PID) controllers which ensure the desired speeds are obtained at the wheels. Two methods are used in calculating proper values of the PID. These are experimental method and model based method. The experimental method uses the Zigler-Nichols autotuning method without any knowledge about the plant to be controlled. In the model based method a mathematical model of the motors are first derived and this is used to design the PID controller. PID controller parameters were tuned according to four ranges of speeds. The PID controller parameters for both DC motors are auto-tuned using Gain Scheduling based on four ranges of speeds. Comparison was made to see the performance of the mobile robot using the PID parameters tuned by the two methods. In this study, fuzzy logic is also applied to generate obstacle avoidance techniques with the information extracted from ultrasonic sensors. Overall performance of the robot when moving to the target shows that the average relative error is less than 0.03 meter for distance and the average relative error for orientation is about 20o when arrived at the robot achieves its target. The average time taken by the robot to arrive at the target in 1 meter is approximately 23 seconds.
  • Publication
    Temperature control using fuzzy controller for variable speed vapor compression refrigerator system
    ( 2022-01-01)
    Siti Qurrata Ain
    ;
    Mohd Saifizi Saidon
    ;
    Siti Marhainis Othman
    ;
    Aziz A.A.
    ;
    Wan Azani Wan Mustafa
    ;
    Wan Khairunizam Wan Ahmad
    Keeping the cold chain vaccine is crucial to a stable immunisation programme; however, faulty processes may occur more frequently than are often thought in developing nations. This paper discusses the quick and accurate control process for designing fuzzy controllers for variable speed vapor compression refrigerator system. The suggested controller is based on the fuzzy logic intended to improve performance while keeping the cooler’s constant internal temperature and increasing the refrigerator efficiency. Despite the external changes such as the outside temperature change or the volume change in the refrigerator vaccine, the fuzzy logic controller is utilised to maintain the interior temperature. However, a variable speed compressor (VSC) must be used to control the thermophysical characteristics, which dramatically alter the temperature with a small pressure change. In this case, fuzzy rules of the sort developed by Mamdani are used to build up the system. The programming platforms utilised to implement the model include MATLAB, SIMULINK, and Fuzzy Logic Toolbox (FLT). The efficiency of fuzzy logic controller design membership will be compared to ensure that the refrigerator temperature is more accurate and until it achieves the best performance, maintains a temperature of 5°C, and adapts to its surroundings. From the research done, the membership 2 with load shows the near accurate temperature of 5°C with steady-state error ±1.97°C.
  • Publication
    Design Three Phase Inverter for Compressor Drive using Single-Phase AC Source
    ( 2021-01-01)
    Faudzi M.A.F.M.
    ;
    Mohd Saifizi Saidon
    ;
    Mohd Z.
    ;
    Aziz A.A.
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Wan Azani Wan Mustafa
    ;
    Alkhayyat A.
    ;
    Abdulsattar A.M.
    Inverters are commonly used in high power applications for induction motors, air conditioners, and ventilation fans. The use of an inverter can save electricity consumption and maximize consumption on the compressor. The compressor runs slowly at night, when there is little or no activity with the refrigerator. It uses just the correct amount of energy to keep the refrigerator at the right temperature. This is where the energy efficiency comes into play, and it may save you anywhere from 20% to 30% on your electric bill. The purpose of this project is to design a three-phase inverter for use on refrigerator compressors. The focus of this project is to generate and analyze the performance of a three-phase AC voltage that will be connected to the refrigerator compressor to produce a maximum voltage of 220 V that gets the current supply from the socket. In this project, a three-phase inverter is simulated using MATLAB/SIMULINK software. At the end of the project, a three-phase inverter successfully produced three-phase voltage and run for load.
      1  13
  • Publication
    The Effect of Infrared Drying on Orthosiphon Stamineus Leaves Quality
    ( 2021-01-01)
    Palanisamy V.V.
    ;
    Mohd Saifizi Saidon
    ;
    Norawanis Abdul Razak
    ;
    Ismail K.A.
    ;
    Siti Kartini Enche Ab Rahim
    ;
    Sulong M.M.S.
    ;
    Alkhayyat A.
    ;
    Wan Azani Wan Mustafa
    ;
    Salah O.R.
    The dryer system is an important part of the drying of food and herbs, among other things. As a result, a special dryer is needed to keep the food or herbs fresh for as long as possible without killing the good nutrients. In this project, Orthosiphon stamineus herb will be used to dry using an Infrared dryer. Infrared drying involves transferring heat by radiation from a hot source to a lower-temperature substance that has to be heated or dried. The temperature of the heated element determines the peak wavelength of the radiation. The purpose of this project is to design an infrared dryer system and analyze the quality of the dried herb. The Orthosiphon Stamineus have been dried using a 200W Infrared dryer system at 60°C for 2hours. Total phenolic compounds and antioxidant capacity were determined using the Folin-Ciocalteu method and the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging activity assay and evaluated using a UV/VIS Spectrophotometer, respectively. A moisture analyzer was used to look at the changes in moisture content, and a colorimeter was used to look at the colour changes. The result showed that drying O.stamineus under 60°C has significantly affected the herbal leaves quality in terms of moisture content, colour properties, Antioxidant capacity, and Total phenolic content.
      20  1
  • Publication
    Design and Simulation of High Gain DC-DC Boost Converter System for PV Application
    ( 2021-01-01)
    Mohd Muqri Syahmi Sulong
    ;
    Mohd Saifizi Saidon
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Wan Azani Wan Mustafa
    ;
    Aihsan M.Z.
    ;
    Hasliza A Rahim @ Samsuddin
    ;
    Habelalmateen M.I.
    Solar power plays a vital role in renewable energy systems as it is clean, sustainable, pollution-free energy, as well as increasing electricity costs which lead to high demands among customers. The main purpose of this paper is to develop an approach to designing a DC-DC boost converter for a standalone connected photovoltaic system with constant output voltage. A controller system DC-DC boost converter is designed to minimise losses and maintain at a particular value. The converter can increase a fluctuating voltage of the solar panel to an increased constant DC voltage. It uses voltage feedback to maintain constant output voltage. The controller is therefore designed as the heart of the closed loop system and offers pulse-width-modulation signal for control of the power electronic device in a boost converter. The boost converter can direct connection to the photovoltaic system grid-connected inverter. Simulations to describe the design proposed have been performed. Simulation work with the designed 75V output voltage boost converter in continuous driving mode was carried out. The test results show that the design proposed is successful.
      1
  • 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.
      1
  • Publication
    9-level Symmetrical Cascaded Switched-Diode with Artificial Bee Colony Optimizer
    ( 2021-01-01)
    Muhammad Zaid Aihsan
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Mohd Saifizi Saidon
    ;
    Wan Azani Wan Mustafa
    ;
    Liew H.F.
    ;
    Alkhayyat A.
    ;
    Majeed S.A.
    Multilevel inverters (MLIs) are power electronic circuits that is used to replace traditional two-level inverters. MLIs allow for more flexible control of the dv/dt and di/dt ratios, as well as a greater number of output levels in voltage and current in staircase waveforms. The design of a traditional multilevel inverter, on the other hand, necessitates additional power switches and has limitations in a broad variety of applications. In this paper, the new approach known as Symmetrical Cascaded Switched-Diode (SCSD) is used to form a nine-level output voltage with fewer switches and its aim to remove low-order harmonics like the 3rd, 5th, and 7th. The switching angles were determined using the Artificial Bee Colony (ABC) Optimizer method and non-linear equations obtained from the Fourier series of the output voltage and current waveform. The suggested circuit was tested with two modulation indices, modelled using PSIM software, and assessed by experimentation. THD for modulation index 0.62 is around 7.09 percent for simulation and 7.7 percent for experimental results, while modulation index 0.84 produces 4.08 percent for simulation and 4.5 percent for experimental results.
      1  17
  • Publication
    Optimization of PD Controller based on ARMAX Model for Vapor Compression Refrigeration System using R600a Refrigerant
    ( 2022-01-01)
    Rajaie M.N.
    ;
    Mohd Saifizi Saidon
    ;
    Siti Marhainis Othman
    ;
    Wan Azani Wan Mustafa
    The research undertaken in this paper is to investigates the difference in approaches to the modelling, design and implementation of an adaptive controller tuned using Auto-Regressive Moving-Average Exogenous (ARMAX) 2,1,1 model in an environment simulated in SIMULINK, applied to a variable speed compressor vapor compression refrigeration system running R600a refrigerant. A vapor compression refrigeration system is chosen for this paper research as it’s the most commonly used type of refrigeration system in all over the world, either for domestic, commercial or industrial application. The refrigeration system consists of a condenser, an expansion valve, an evaporator and a compressor which are modified from a fixed speed compressor to a variable speed compressor. The compressor was modified to be able to accommodate the usage of R600a refrigerant. R600a refrigerant has a thermophysical properties which can roughly be define as a slight change in pressure will result in a drastic change in temperature [1]. To be able to control the pressure for R600a with precision, an optimized adaptive controller is required. For the purpose of the simulation, the refrigeration system mathematical model is simplified to a linear polynomials ARMAX model. This is to reduce the complexity of the control design strategies, which in term improve the implementation of the new controller design. The optimization of the adaptive controller design, its simplicity of implementation, speed of convergence and robustness are concluded at the end part of the paper.
      4  26