A. K. M. Mohiuddin | International Islamic University Malaysia (original) (raw)

Papers by A. K. M. Mohiuddin

The effectiveness of the developed automation system on the vehicle was verified with the validat... more The effectiveness of the developed automation system on the vehicle was verified with the validated mathematical model. The vehicle's tractive efforts recorded with the installed developed automation system in the range of 40 to 64 % of the vehicle gross weight and 47 to 67% of the vehicle dry weight, represent the high effectiveness of the torque transducer. Furthermore, the recorded vehicle's maximum tractive effort at the slippages in the range of 6 to 12% also represents the higher effectiveness of the developed speed transducer. Integrated developed automation system is considered precise and effective from the recorded tractive effort of 62% of the 6 wheeler drive vehicle's gross weight at 15% slippage.

This research describes the electrical power generation in Malaysia by the measurement of wind ve... more This research describes the electrical power generation in Malaysia by the measurement of wind velocity acting on the wind turbine technology. The primary purpose of the measurement over the 1/3 scaled prototype vertical axis wind turbine for the wind velocity is to predict the performance of full scaled H-type vertical axis wind turbine. The electrical power produced by the wind turbine is influenced by its two major part, wind power and belt power transmission system. The blade and the drag area system are used to determine the powers of the wind that can be converted into electric power as well as the belt power transmission system. In this study both wind power and belt power transmission system has been considered. A set of blade and drag devices have been designed for the 1/3 scaled wind turbine at the Thermal Laboratory of Faculty of Engineering, Universiti Industri Selangor (UNISEL). Test has been carried out on the wind turbine with the different wind velocities of 5.89 m/s, 6.08 m/s and 7.02 m/s. From the experiment, the wind power has been calculated as 132.19 W, 145.40 W and 223.80 W. The maximum wind power is considered in the present study.

Abstract—The measurement of aerodynamic forces and moments acting on an aircraft model is importa... more Abstract—The measurement of aerodynamic forces and moments acting on an aircraft model is important for the development of wind tunnel measurement technology to predict the performance of the full scale vehicle. The potentials of an aircraft model with and without winglet and aerodynamic characteristics with NACA wing No. 65-3-218 have been studied using subsonic wind tunnel of 1 m× 1 m rectangular test section and 2.5 m long of Aerodynamics Laboratory Faculty of Engineering (University Putra Malaysia).

Abstract This work describes the aerodynamic characteristic for aircraft wing with and without bi... more Abstract This work describes the aerodynamic characteristic for aircraft wing with and without bird feather like winglet. The aerofoil used to construct the whole structure is NACA. Rectangular wing and this aerofoil have been used to compare the result with previous research using winglet. The model of the rectangular wing with bird feather like winglet has been fabricated using polystyrene before design using CATIA P3 V5R13 software and finally fabricated in wood.

Abstract This paper describes the influences of two pair of elliptical and circular shaped wingle... more Abstract This paper describes the influences of two pair of elliptical and circular shaped winglets with the wing of the aircraft model for the reduction of induced drag without increasing the span of the aircraft. Aerodynamic characteristics for the model aircraft wing with NACA section No. 65-3-218 with and without elliptical and circular winglets have been studied using a subsonic wind tunnel of 1m× 1m rectangular test section. Lift and drag measurements are carried out using a six component external balance.

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Electro-mechanically controlled continuously variable transmission (CVT) system is an automatic t... more Electro-mechanically controlled continuously variable transmission (CVT) system is an automatic transmission system that can change the gear ratio to any arbitrary setting within the limits. This system includes an AC motor, set of power screw, an electromagnetic pick-up sensor, and two DC motors. Electromagnetic wheel speed sensor (WSS) generates the voltage with the travelling speed of the vehicle for operating the DC motor with a double acting magnetic pull-in solenoid switch. The function of power screw mechanism is for shifting movable sheaves axially along the shafts by the DC motor. Both the driving and driven pulleys' moving sheave move at the same time exactly the same linear distance but in opposite directions. The relationship between the DC motor speed and its response time to actuate the moveable sheave was studied. The response time is the time needed for the sheave to travel axially covering all of its stroke length. The response time was derived from motor rpm and its linear speed provided that the whole stroke length equals to 13.6 mm.

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This paper describes the unique structure of an aircraft model with and without winglet tested at... more This paper describes the unique structure of an aircraft model with and without winglet tested at Aerodynamics Laboratory, Faculty of Engineering (University Putra Malaysia) using subsonic wind tunnel of 1000 mm × 1000 mm rectangular test section and 2500 mm long. Focusing on predicting the aerodynamic characteristics of the aircraft model, three main issues are studied in this paper. First, a six component wind tunnel external balance is used for measuring lift, drag and pitching moment. Secondly, Tests are conducted on the aircraft model with and without winglet. And thirdly, Artificial intelligence system such as fuzzy logic approach is used to predict the lift coefficient performance. Therefore, the primary purpose of this work was to investigate the relationship between lift coefficients, with free-stream velocities and angle of attacks, and to illustrate how fuzzy system might play an important role in prediction of lift coefficient with the addition of certain winglet configurations.

Proceedings of the …, Jan 1, 2011

Abstract CAMPRO engine is a basic Double Overhead Camshaft (DOHC) which has a capacity of 1597 cc... more Abstract CAMPRO engine is a basic Double Overhead Camshaft (DOHC) which has a capacity of 1597 cc and installed with a total of 16 valves developed by Malaysian car manufacturer PROTON. The CAMPRO engine experiences performance downfall (torque ...

Computational …, Jan 1, 2011

ABSTRACT The performance of two impellers (Rushton and Elephant ear) for waste cooking oil (WCO) ... more ABSTRACT The performance of two impellers (Rushton and Elephant ear) for waste cooking oil (WCO) transesterification were experimentally and numerically evaluated inside a unbaffled and baffled stirred tank reactor (STR). Three parameters (impeller bottom distance (C), speed, (N) and temperature) were investigated for fatty acid methyl esters (FAME) yield using a Taguchi orthogonal array (OA) experimental design. The mixing study is based on the κ-ε and large eddy simulation (LES) turbulent model using a multiple reference frame (MRF) approach and the result was validated by particle image velocimetry (PIV) measurement. Overall flow structure in the baffled in STR was isotropic at C = 20, 25 and 30 mm for Rushton and to a lesser extent at the STR centre in the unbaffled STR. Mean radial velocities of the Elephant ear impeller was about 25-30% of the Rushton impeller for 600 rpm and 85-90% in baffled STR at C = 30 mm in the unbaffled STR. CFD results of κ-ε and LES results were qualitatively similar at mid-impeller plane than for the other parts of the STR. However, none of the model could capture the vortex trailing encountered with Rushton impeller. Experimental mixing time, a function of FAME yield and liquid velocities were found to be dependent on stirrer speeds, impeller bottom distance and bulk flow pattern. The study demonstrated the effect of different impeller types used in the laboratory on FAME yield and attributed to flow characteristics. This model is being used to evaluate other conditions of the reactions.

Journal of Energy and Power …, Jan 1, 2010

英文摘要 This paper describes the unique structure of an intelligent air-cushion system of a hybrid e... more 英文摘要 This paper describes the unique structure of an intelligent air-cushion system of a hybrid electrical air-cushion track vehicle working on swamp terrain. Fuzzy expert system (FES) is used in this study to control the swamp tracked vehicle&amp;amp;amp;amp;#x27;s intelligent air cushion system while it operates in the swamp peat. The system will be effective to control the intelligent air-cushion system with total power consumption (PC), cushion clearance height (CCH) and cushion pressure (CP). Ultrasonic displacement sensor, pull-in solenoid ...

Journal of Mechanical Science …, Jan 1, 2011

This paper presents the control system of cushion pressure for the developed intelligent air-cush... more This paper presents the control system of cushion pressure for the developed intelligent air-cushion track vehicle (IACTV) for operating on swamp terrain and wet fields. A novel auto-adjusting supporting system is designed for the vehicle's intelligent air-cushion system. Focusing on minimizing the total power demand of the vehicle, an optimization model has been established, for examining the effects of vehicle parameters and load distribution on power consumption by controlling air-cushion pressure. Then optimum cushion pressure is determined based on the developed optimum pressure -sinkage relationship and the pressure in the cushion chamber is controlled by the Fuzzy controller by maintaining volume flow rate and continuously monitored by the pressure sensor attached with the cushion chamber. The ultrasonic displacement sensor is used to measure the sinkage of the vehicle. The output voltages of the ultrasonic displacement are used to operate the pull-in solenoid switch through the microcontroller which closes the circuit of the compressor motor. Distribution of vehicle load to the air-cushion system is controlled by Fuzzy Logic controller by maintaining the inside pressure of the cushion.

Journal of Energy and Power …, Jan 1, 2010

World Academy of …, Jan 1, 2010

Fuzzy logic approach is used in this study to predict the tractive performance in terms of tracti... more Fuzzy logic approach is used in this study to predict the tractive performance in terms of traction force, and motion resistance for an intelligent air cushion track vehicle while it operates in the swamp peat. The system is effective to control the intelligent air -cushion system with measuring the vehicle traction force (TF), motion resistance (MR), cushion clearance height (CH) and cushion pressure (CP). Sinkage measuring sensor, magnetic switch, pressure sensor, micro controller, control valves and battery are incorporated with the Fuzzy logic system (FLS) to investigate experimentally the TF, MR, CH, and CP. In this study, a comparison for tractive performance of an intelligent air cushion track vehicle has been performed with the results obtained from the predicted values of FLS and experimental actual values. The mean relative error of actual and predicted values from the FLS model on traction force, and total motion resistance are found as 5.58 %, and 6.78 % respectively. For all parameters, the relative error of predicted values are found to be less than the acceptable limits. The goodness of fit of the prediction values from the FLS model on TF, and MR are found as 0.90, and 0.98 respectively.

International Journal of …, Jan 1, 2011

This paper presents an integrated mechanics for the design of hybrid electrical air-cushion track... more This paper presents an integrated mechanics for the design of hybrid electrical air-cushion tracked vehicle. The air-cushion of HETAV is protected with a novel-design air-cushion supporting system which can adjust automatically. A propeller is installed on the vehicle to develop additional thrust for overcoming the dragging motion resistance of the air-cushion system. The mean values of traction for the vehicle with propeller compared with no propeller increased 10.21% and 6.47% for the vehicle weight of 2.45 kN and 3.43 kN, ...

International journal of refrigeration, Jan 1, 1996

... Performance Chemical Publishing Co., New York (1984) pp 122133 5 Zivi, SM, Brand, BB An analy... more ... Performance Chemical Publishing Co., New York (1984) pp 122133 5 Zivi, SM, Brand, BB An analysis of the crossflow cooling tower Refrig Eng (1957) 64 3134, 90 92 6 Benton, DJ A Numerical Simulation of Heat Transfer in Evaporative Cooling Towers Tennessee Valley ...

International journal of refrigeration, Jan 1, 1996

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Proceedings of the …, Jan 1, 2011

Computational …, Jan 1, 2011

Journal of Energy and Power …, Jan 1, 2010

Journal of Mechanical Science …, Jan 1, 2011

Journal of Energy and Power …, Jan 1, 2010

World Academy of …, Jan 1, 2010

International Journal of …, Jan 1, 2011

International journal of refrigeration, Jan 1, 1996