Pusat Pengajian Kejuruteraan Aeroangkasa - Monograf

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Active magnetic control of gravity gradient satellite using 3 magnetic torquers
(2009-04-01)
Mohd Sabri, Mohd Naim
This thesis deals with design of controller for gravity gradient satellites. One of the control techniques that have been used on this type of satellite is magnetic control technique. Thus, in this project the magnetic attitude control of the gravity gradient satellite will be analyzed. Three magnetic torquers will be used and placed along the satellite primary axes. Then, the comparison of the Euler Angle between original properties of satellite and after added with the torquers can be made after the simulation is done. In this, the results of the research are obtaining from the simulation models that designed from MATLAB SIMULINK software. On the other hand, the development is taking the first Malaysia microsatellite, TiungSAT-1 as the references model of it characteristic and initial conditions. At the end of this project, should understand the role of the three magnetic torquers to the gravity gradient satellite due to the satellite missions. The findings of this project also prove that Euler angles of the satellite can be control with more accurate with the existence of the controller.
Aeros - conceptual design of uav composite airframe
(2009-04-01)
Mohd Shaharanee, Mohd Izmir
This project presents AEROS, a new conceptual design of Unmanned Aerial Vehicles. This UAV will have a mission to scout the weather in Malaysia. Although this projects is about the conceptual design, but the main part that is focused is the structural configuration. All of the layout that can be considered suitable for the requirement will be analyze. The selection of the material also will be analyzed first before the final designs begin. An assembly of part finally is done in the final stage of this project and a new UAV is born. There are some limitation occurs during this project, such as the limited resources of the previous related project, lack of knowledge on the designing method and also time consuming when design using CAD software stage. This project actually can become quite helpful to a lot of people. Weather is one of the elements that if we know it, we can gain a great profit after it. At the end of this project, the things that should be understand on designing an aircraft is that weather our step in design will lead to the fulfillment of the objective or vice versa.
Aircraft of the light sport aircraft category. Common problems of conceptual design; development of aircraft layout; choice of structure; design of main airframe units
(2009-03-01)
Ting, Wen Ong
The purpose of this project is to choose a suitable structure of LSA, and design its main airframe units. The high humidity of Malaysia climate condition and geographical location of Malaysia which is surrounded and near the sea pose a great challenge for LSA designers. Another reason to design a LSA is that Malaysia has market potential for LSA since the concept of experimental aircrafts has been well established in Malaysia. This project started by comparing different kind of structures and materials. It is found that the aluminum-tube-and fabric construction is the best choice. The reason behind it simply because of the excellent corrosion resistance properties of aluminum alloy 6061-T6, which is widely used in aviation industry. After that, the aircraft configuration is determined. High wing, flapless wing and tricycle landing gear are the main features of this LSA. Another feature of the LSA is light weight. It is light because the material is aluminum alloy, and the LSA is covered by fabric. The fuselage is designed based on the concept of ultralight, with a tail-boom fuselage structure. This is another cost saving design. Besides that, at the tail part of LSA, rudder is designed to have a similar tube structure as elevator, while vertical stabilizer has a similar tube structure as horizontal stabilizer. This will save the cost of manufacturing of LSA. The final parts are designing and drawing of main airframe units of the aircraft using CATIA. Because there is no structural analysis is done on the aircraft parts, without accurate dimension of the LSA, I find it difficult to coordinate and assemble the airframe units together.
Airlines and airport operation and management in malaysia (amo)
(2008-04-01)
Ibrahim, Muhammad Hafidz
This paper express about the study of airport and airlines management and operation in Malaysia (AMO). It is used to implement the good system to the airport and airlines. The studies on the subjects of these papers are to gain some idea, knowledge and finding the problems due to the airport and airlines especially in Malaysia. The airlines and airport is interconnected among its’ management and operation. This title it is focuses about the flight schedule, gate assignment, cargo ground and baggage handling, and ground handling. In aviation, flight schedule play a central part in the aircraft business for airlines and aircraft operation and management. The main crisis for this flight schedule is when the aircraft delay to reach to the destination airport which can give an effect to the entire management and operation for airlines and aircraft. The way to solve this problem is to minimize the time used for the whole aircraft operation by defining the factor to create the delay and to solve it by analysis. Gate assignment is to make sure the aircraft management and operation system is in control at the airport. The problem with gate assignment is when there are many numbers of ungated flights at the airport. The main purpose of flight to gate assignment is to properly assign the aircraft to suitable gates, so that passengers can conveniently embark and disembark. The alternative is to define the number of gate that applied at the airport and reconstruct the gate assignment schedule to make sure there are no ungated flights at the apron of the terminal. Cargo ground handling operation is located at the cargo terminal and it is used to pack all things in the pallet before we put it into the aircraft. The problem about cargo handling is not very important because it is related to the big size of the pack. So that the probability to be lost during handling is less if compare to baggage handling. Baggage handling operation is located the passenger terminal or main terminal. It is related to the passenger baggage which is probability to be lost is high because of the size and misconduct by the baggage handler.
Analysis for the structural integrity of deployable truss
(2008-04-01)
Yu, Kok Hwa
The purpose of this project is to design an ideal single module deployable truss structure for space application. It is a structure which capable of large configuration changes in an autonomous way. The configuration can changes from a packaged, compact state to a deployed, large state. There are several structural aspects were taken into consideration, i.e. geometry, stiffness, loading, weight, rigidity and stability, in order to design an optimum deployable truss. In this final year project, it outlines the methodology to design, model, analyse and obtain an ideal deployable truss through optimization. The designed truss structure should be able to support two solar arrays weighted 1000kg each in the space environment and able to retract for easy storage. Stress and buckling analysis were conducted using Finite Element Method for simplified model before complicated three-dimensional model were analysed in widely used computer-aided software like MSC. PATRAN with MSC. NASTRAN. A MATLAB program implementing Direct Stiffness Method is established for analytical and computational verification. An optimum design structure is obtained through parametric optimization in the latter part of design process. Hopefully, this multi purpose structural element will be a crucial structure element in the future for the benefit of mankind.
Analysis of a cracked metallic panel repaired with bonded composite material
(2009-04-01)
Tan, Chin Wei
The aim of reinforcement of the damaged or cracked part of a structure is to restore structural efficiency. A two-dimensional finite element analysis is presented to predict the efficiency and effectiveness of the repaired pre-cracked metallic panel with bonded composite patch. In this analysis, pre-cracked aluminum 2024-T3 panels (680 x 180 x 1.5mm) repaired with rectangular boron-epoxy composite patch with different overlap length were modeled and analysis using MSC Patran/Nastran. Several configuration of design of patch were investigated. Two-dimensional finite element analysis involving three layer technique is introduced to investigate the stress intensity factor, maximum 2D stress, load carrying capacity and crack propagation. 2D Mindlin plate elements which are with transverse shear deformation capability are applied in the analysis; cracked plate, adhesive and boron-epoxy composite patch. Maximum 2D stress and stress intensity factor at the crack tip of the repair panels are compared with the unpatch panel. It was found that there are significant reductions of maximum 2D stress and stress intensity factor at the crack tip after patching is done. In the analysis, the most effective design of patch will be determined.
Automatic guided vehicle
(2009-04-01)
Mohd Sopian, Mohd Idzadin
This project is design and fabricates the system of an Automated Guided Vehicle (AGV). The AGV prototype is a moving load mobile robot, which is purposely used in laboratory environment condition. The load is practically moved from one destination to another by automatically or manually commanded by operator. The AGV is fabricated from the plywood, child toy car and et cetera. The plywood is use for making a board as the main structure. Meanwhile, the child toy car parts are serving as AGV collective part component. This AGV prototype was utilizing the two motor types, which is the DC brush motors and the car power window motor, which is both can be rotated clockwise or anti clockwise. The DC motor is use for drive the AGV movement forward or rearward movement. For the turning movement, by utilizing the lever concept with the car power window motor rotation as the steering movement with help of two control disc plates with infrared slotted switch. For the carrier drive commands, it was generate by the main on-board controller. The main on-board controller is the main brain that controls all the activity of the AGV and user controller was working as the user interface platform. This on-board controller type was the non-intelligent type (semi automatic), which is not able to make decisions and requires information. The AGV prototype project were use 6volt and 12 volt recharge batteries as power resource and the batteries recharge are only applied when the AGV was shutting off.
Comparative study on structural performance of panel (secondary structure) using metallic and composite material
(2009-04-01)
Lee, Shih Yung
The objectives of this thesis are to carry out comparative study on the structural performance of panel (secondary structure) using metallic and composite materials, comparing the performance of metallic and composite materials through finite element analysis, i.e. modal analysis and conceptual analysis, i.e. the Ashby method. The properties of metallic and composite materials are obtained from a series of handbooks and reference books. When practicing FEA on both metallic and composite materials, MSC Nastran workshop is referred. In FEA, comparison is made between aluminium, steel, titanium (metallic materials) and Kevlar 49 – epoxy, graphite – epoxy, carbon – epoxy (composite materials). Characteristic of those materials is studied through determining the natural frequencies. For the Ashby method, structural performance based on reliability and durability is studied in metallic materials (aluminium and titanium) and composite materials (GFRP and CFRP). Besides, structural performance of sandwich structure is also discussed. The results show that composite materials have better structural performance than metallic materials. Characteristics of the materials are studied through comparing properties namely, strength, elastic modulus, stiffness, density, fatigue, and corrosion. The results are similar to the trend of aviation industry which nowadays has increasingly used composite materials rather than metallic materials for optimized structural performance.
Computational fluid dynamic (cfd) simulation of 3-dimensional pitching wing
(2014-04-01)
Laili Anuar, Mohammad Adzlan Shah
A study of the dynamic behavior of the delta wing undergoing oscillatory 3D pitching motion has been studied using computational fluid dynamic (CFD) code Fluent 6 TM. A flat delta-shaped half wing with sharp leading edge and sweep angle of 70 degree was chosen in this CFD simulation. A hybrid mesh was generated in the surrounding region. A simple harmonic motion equation used to prescribe the motion of the 3D pitching wing. The wing was sinusoidally pitched about its one half chord at reduced frequencies ranging from 0.05 to 0.30 at root chord Reynolds numbers between 9 × 104 and 3.5 × 105, for angle of attack ranges of 29 ° to 39 ° and 0° to 45°. The steady case of α= 0°, 29°, 39°, 45° were also investigated. The solver used was implicit segregated and the turbulence modeling was Spallart-Almarast with standard wall function. The preliminary results show that the Computational Fluid Dynamics (CFD) results have fairly agreement with the available experimental data.
Conceptual design of hand-launch uav in preliminary sizing
(2009-03-01)
Tang, Kia Wei
Nowadays, there is still no one standard procedure to design Unmanned Aerial Vehicles. The design approach varies according people and criteria to be considered. In this Hand Launch UAV design project, book of Airplane Design by Dr. Jan Roskam used as primary reference approach. According to Airplane Design, Preliminary sizing is the very first of in conceptual design of airplane as well as UAV. Preliminary Sizing is the first phase to be carried before further design process going on. The overall result of preliminary sizing can be divided into to two categories, which are weight and performance. The results of weight sizing are gross take-off weight, empty weight, mission fuel weight of UAV. Whereas, the performance sizing are to find the maximum required take-off power and wing area for UAV by determine the maximum lift coefficient at different mission profile. This thesis describes the method and process of governing of relationship for UAV empty weight and takeoff weight, and “matching plot” at given requirement to be fulfilled. The design method in initial sizing for the Hand launch UAV is described in Airplane design: Preliminary sizing book by Dr Jan Roskam. The result of the preliminary sizing has met the assigned technical requirements in which the maximum take off weight of the UAV do not more than 5kg with empty weight of 3.4kg. The UAV flies at height of 100m with speed 50km/h and maximum cruise speed of 80km/h.
Design and optimization of an aeronautical composite laminated panel
(2009-04-01)
Idris, Nur Hidayah
A rectangular composite laminated panel is optimized in terms of mass (weight reduction) using MATLAB programming code. The first level of optimization process deals with failure resistance and defining the minimum thickness of the overall plies and percentage in each fibre orientation. The fibre orientation used are only limited to a sets of (0°, 45°, -45°, and 90°). Rounding process was done after obtaining the minimum thickness of the overall plies and percentage in each fibre orientation. The final results of the entire optimization process program are number of the plies in each fibre orientation.
Design of multipurpose helicopter for malaysia condition
(2009-03-01)
Abdul Razak, Siti Noorseri
Multipurpose helicopter seems to be one of the major trends in the aircraft design for the rotorcraft categories due to the market demand. There are used for air ambulance, search and rescue operasion, take photographs, film movies, air transportation, and fire detection. The main features that makes the helicopter in high demand is it can take off and landing vertically, no need a runway but just a heliport required. They are very ideal transport for operation in very limited space and suitable to use in major place in Malaysia especially in rural area where there is no airstrip. Referring to the situation in Malaysia, there is a high potential for helicopter use demand by the government, industry and corporate sector. Therefore it is expedient to design the multipurpose helicopter that may be used to fulfill the requirements of nowadays and future, and suit the Malaysia landform and environment. The main objective of this project is to design a helicopter at the same time can handle multipurpose missions that are most needed and suitable for Malaysia condition in terms of temperature and altitude above sea level at places in Malaysia. Some method and calculation were using to achieve the objective. The first step is collecting the data about Malaysian fleet such as the types and number of helicopter, temperature and average altitude. After that, the helicopter prototyope was chosen to use the initial data to find the estimation of weight. Analysis about the performances of helicopter between the Europe condition and Malaysia condition was done and the requirement for the design heliocpter so that the objective of every production is to produce very economical cost of helicopter and at the same time very high performance of the helicopter can be achieved. As conclusion, there are many of differences performance of helicopter in Europe and Malaysia condition because it has the different temperature. Besides that, the numbers of blades also influence the performance and cost of the helicopter.
Design, fabricate and test a solid propellant rocket motor
(2009-03-01)
Teh, Lloyd Tzer Tong
The study of a small solid propellant rocket motor is presented in this report. A rocket motor is designed, fabricated and tested in static test rig to obtain experimental results. The solid fuel consists of a composite propellant that utilizes Potassium Nitrate, Epoxy and Ferric Oxide. The addition of Ferric Oxide serves as a burn rate modifier to increase the propellant burning rate. The use of composite propellant allows the propellant to be cold casted which makes it safer to fabricate. The cartridge loaded propellant grain configuration makes it possible for several firing tests using the same motor to obtain a good result. Burn-rate tests show that propellant burn-rate depends on the voids present in the propellant and the mixing ratio of epoxy resin and hardener. By minimizing the voids present in the propellant grain and increasing the resin to hardener ratio, faster burn-rate is possible which in turn increases the average thrust of the motor. Experimental result shows that the motor has a lower total impulse. Investigation suggested that the lower density of the propellant grain prepared is the cause of it. As for the specific impulse, experimental result lies near the expected value.
Eagle wing design
(2009-04-01)
Lee, Chunhow
A wing flapping mechanism with span variation analogous to eagle wing was developed in this project. The flapping motion which imposes the required kinematics was designed according to the bird flapping mechanism with the corresponding motor driven/gearbox mechanism and visualized using CAD software. The rotary motion of motor is converted to linear motion by driving linkage to provide a continuous bird-like wing flapping motion. The 1 DOF flapping wing structure, which flap about the spar joint was further developed and fabricated into prototype with appropriate materials. Based on the model, the lift characteristics of flapping flight were investigated by testing at various angles of attack, wind tunnel speeds and flapping frequencies with the aids of wing tunnel. The model was tested at a range of parameters up to 15 angle of attack, 10.8m/s wind speed and 3.185Hz frequency. Lift characteristic of the flapping wing responding proportional to angle of attack, wind speed and flapping frequency. However, due to the motor power constraint, higher frequencies testing were not performed and the maximum available lift of this particular model was undetermined. Therefore, a bigger motor is needed in order to determine the optimum lift performance of this model.
Effects of cross flow on flapping wing performance
(2009-03-01)
Husin, Surianurhaiza
The creation of micro air vehicles (MAVs) of the same general sizes and weight as natural fliers has spawned renewed interest in flapping wing flight. With a wingspan of approximately 15 cm and a flight speed of a few meters per second, MAVs experience the same low Reynolds number (104–105). Although the flapping wing is good for aircraft maneuver in a still air, but the effect of cross wing on the aerodynamic performance is lacking. Due to the low flight speeds, any disturbance such as gusts or wind will dramatically change the aerodynamic conditions around the flapping wings. This thesis uses the bat type flapping wing and the analysis of flow around the wing was simulate by using FLUENT and GAMBIT software package. The lift and drag force produced from the simulation were examined and compared with the experimental result from the recent research. The lift force will increase with the increasing of wind speed and the wind speed also increases when flapping frequency increases. With the increasing of angle of attack also influence the lift produced from the flapping wing motion.
Finite element analysis of aeronautical composite laminated panel (secondary structure)
(2009-04-01)
Bazal Ahmad, Mohammad Muzzammil
Stress analysis of a honeycomb sandwich panel was studied in this project . Software packages, based on the Finite Element Method (FEM) was used to model and analyze the panel model. A uniform distributed pressure was applied to the panel in performing the structural analysis. The result obtained in the analysis were Von Mises Stress, maximum shear stress and deformation at the honeycomb sandwich panel. The type of analysis used was linear static.. From the results shown, the ply stacking sequences and material used for the facing can influence the stress distribution and deformation at honeycomb sandwich panel.
Modeling and analysis of aero-composite materials in aircraft structure applications
(2009-04-01)
Mustaffa , Mohd Syahiran
This final year project focuses on the conceptual three-dimensional modelling of a composite honeycomb sandwich structure for use as skin panels to common commercial aircraft airframe structures. The honeycomb sandwich structure was modelled using CATIA V5R16 Composites Design workbench. It is then analysed via finite element analysis using CATIA Generative Structural Analysis workbench. Airframe structures of nose radome, inboard trailing edge mid flap, elevator and rudder was then modelled using CATIA design workbenches, based on the real airframe structures of the Boeing 747, and are assembled with composite skin panels based on the modelled composite honeycomb sandwich structure. The airframe structures are then analysed by finite element analysis using CATIA Generative Structural Analysis workbench and the effects and outcome of Von Misses stress, stress principal tensors, deformation and translational displacements due to static loading on the structures is observed. Conclusion on the suitability of the modelled composite honeycomb sandwich structure as airframe structure skin panels was then made.
Modeling of hydraulic components in rotorcraft systems
(2008-04-01)
Saruji, Mohamad Ismail
This research is involving studies of hydraulic components in rotorcraft and the effect of pressure, velocity and displacement of piston in hydraulic cylinder to rotorcraft maneuver. Research also cover the real mechanism of hydraulic components in rotorcraft especially helicopter. Hydraulic components equations and parameters also had been study in creating physical modeling of hydraulic components. Real helicopter hydraulic system had been study using manuals and production magazines. SimHydraulics® software in MATLAB® 7.5 (2007b) is use in build up the physical model for hydraulic system simulations. Through this research new hydraulic system physical model been recreated as simplify to the complicated hydraulic system in real working condition of helicopter maneuver. Physical modeling will simulate the real working system as better understanding to the people who want to learn hydraulic in rotorcraft. Result from this research should give people enough basic information on how real hydraulic system in rotorcraft works especially system that controls the main rotor. The effects of changing certain area in hydraulic cylinder also will show how pressure, velocity and piston displacement also change. Hydraulic system for helicopter Eurocopter AS350 will be the reference of actual hydraulic system in this research.
Multipurpose helicopter
(2008-04-01)
Abu Nawas, Sayeda Nafisah
Helicopters are the most popular type of aircraft being used widely in various tasks. Nowadays, light helicopter with multipurpose mission seems to be one of the major trends in the aircraft design. There are used for air ambulance, search and rescue operation, take photographs, film movies, air transportation, and fire detection. The main features that makes the helicopters in high demand is it can take off and land vertically. They do no need a runaway but just a helipod required and they are very ideal transports for operation in very limited space and suitable to use in major place in Malaysia especially in rural area where there is no airstrip. The ability of helicopter to hover means that it can land almost anywhere fairly flat firm surface exists and can move freely from a spot to another spot. Referring to the situation in Malaysia, there is a high demanding for helicopter use especially by the government, industry, and corporate sector. Therefore, it is expedient to design the light multipurpose helicopter that may be used to fulfill the requirements of nowadays and future, and suit the topography of Malaysia. The final year project entitle “Light Multipurpose Helicopter’ is a very interesting project because there a lot of opportunities for innovation and highly multidisciplinary nature of helicopter engineering problems.
Numerical aided program for obtaining optimum combination of fibres, matrix and fiber volume fraction for aircraft applications
(2009-04-01)
Daungkil, Imee Lister
Lamina or unidirectional composites properties can be determined experimentally from simple coupon tests. However due to substantial diversity of fiber and matrix properties, it is impractical to do testing for all available composite materials as testing is time consuming and costly since they are the functions of several design variables; the individual constituents of the composite material, fiber volume fraction, packing geometry, processing, etc. Another approach is to develop an analytical mathematical modeling to predict unidirectional composites properties by using properties of the constituent materials through the procedures of micromechanical and macromechanics which can provide useful approximate values when test data are unavailable. By using such approach, the design variables can be manipulated to achieve required optimum mechanical properties unidirectional continuous fiber composites. The purpose of this present study was to determine how both design variables fiber volume fraction and fiber orientation variations can produce optimum stiffness and strength properties by using analytical approach with the aid of numerical aided program. A simplified graphical user interface, (GUI) based on the Matlab program has been developed to assist in performing comparisons between analytical results .The results were validated using experimental data from the literature. It was found that the analytical model agreed well with those of the experiment results. Different fiber orientation and fiber volume fraction were investigated in which the elastic constants and strength for unidirectional lamina and off-axis lamina were obtained.

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