Theses & Dissertations

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https://hdl.handle.net/20.500.14170/1590

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Recent Submissions

Now showing 1 - 5 of 143
  • Publication
    Enhancement of engine performance by studying the effect of cam profiles design on Modenas motorcycle using 1-D simulation analysis (Restricted)
    (Universiti Malaysia Perlis (UniMAP), 2017)
    Mohamad Syafiq Abdul Khadir
    In the automotive industry, enhancing and improving the engine performance is one of the major work for improving the overall performance of the engine and vehicle. Every iteration of the engine, will overcome the issues raised in the previous batch of the engine as well as improve the brake power and brake torque of the engine. There are a lot of aspects need to be considered in achieving this objective such as intake part, exhaust part, camshaft and cam profiles. Thus, this research is proposed to enhance overall engine performance by improving current cam profiles for MODENAS CT115S model. The current performance for MODENAS CT115S below than other competitors. By using geometrical analysis, five new designs were proposed with different cam parameters including circle base radius and cam profile. By the aid of AVL Advance Simulation Technology software, the benchmarking of real and baseline data were conducted in order to verify 1-D simulation planning for the simulation purposes. Once the result of the simulation was in the acceptable range, the new designs can be investigated to find the valve lift and cam characteristics. From the valve lift curve, new cam designs were undergoing simulation to determine the engine performance curve. Among all new cam designs, cam design D, with 14.5 mm plotted the second highest maximum valve lift but generated the highest brake power and brake torque curve. Therefore, this cam design was the optimum design among all five designs with the best performance curve, with 8.89 N-m at 7000 RPM of brake torque and produced 7.25 kW of brake power at 9000 RPM.
  • Publication
    Improvement on the design of RapMan 3.1 3D printer using boothroyd dewhurst DFMA
    (Universiti Malaysia Perlis (UniMAP), 2017)
    Ahmed Mohamed Wahba El Hadad
    This study focus on using Design For Manufacturing and Assembly (DFMA) to improve RapMan 3.1 3D printer. There are many methods of DFMA such as Hitachi Assembly Evaluation Method (AEM), Lucas-Hull and Boothroyd Dewhurst method; however this study uses Boothroyd Dewhurst method for improving Rap Man 3 .1. Using Boothroyd Dewhurst DFMA gives some advantages such as giving a methodical strategy to investigating a proposed plan from the perspective of assembly and fabricate. The outcome is less difficult to assembly which is less costly to collect and make it can give a pure resultant value of the time, cost measured before and after the developing process determining the best and the most efficient way to develop the unit and powering the theory. However, using DFMA has proved that the new developed design is more efficient, and saves cost and time. These advantages made it recommended to use this method in improving RapMan 3.1 which is one type of Reprap 3D printers. RapMan 3.1 has been noticed to be very difficult to assemble, due to the similarity between its pieces, whether it was by same orientation or symmetries. Also, during the assembly there are too many pieces which are hard to reach, so, in order to solve such a problem, redesigning the unit to be more suitable for regular user and also designing it more efficiently has made the unit easier to assemble, saving time, money and proving the principle of the Reprap upgrading ability. The RapMan 3.1 has a cubic shape constructed from the comers of the form. The process of redesigning included only the eight head corners as it includes most of the small parts, which are very easy to lose with no spare parts, as well as most of the similar parts, decreasing the number of parts from 15 parts to only one part. These adjustments will improve RapMan 3.1 3D printers. The new developed design will be more efficient, saves cost and time. Improving steps in this study starts with designing by handing sketches then solid work software, using DFMA Efficiency Table by making two tables one of them for the original parts and the other is for the new parts, Then making a comparison between the results of both of them to extract the design efficiency, using DFMA Equations such as effect of weight on handling time equation and effect of chamfer design equation, and using Pugh method by selecting one from three designs and the last step is parts fabrication by using Rap Man 3.1 3D printer and ABS material. The consequences of these steps will lead to reduce the total assembly steps from 429 steps to 349 steps, reduce the parts from 1502 parts to 1182 parts, and reduce the assembly time from 5197.24 Sec to 3999.26 Sec. It will make its assembly much easier by reducing the number of parts which will reduce the number of steps consequently. Hence, a lot of time and effort will be saved as well as encouraging fans of (DIY) 3D printers to start generating more creative ideas about some ways improve these type of printers. Also for those customers who prefer (DIY) 3D printers will be excited about the new version of Rap Man 3 .1 and looking forward to more enhancements in this field.
  • Publication
    Application of project management principles in UniMAP's solar shade development & implementation program (SSDIP) (Restricted)
    (Universiti Malaysia Perlis (UniMAP), 2016)
    Suha Ibraheem Hamad
    This study applies the appropriate Project Management (PM) principles in UniMAP's Solar Shade Design and Implementation Program (SSDIP) so that the SSDIP can be implemented efficiently in terms of time, cost, and quality, and to ensure the continuity of the project in the future. In the course of the study, the actual planning and designing of the solar shade is carried out. The PM tools used are Plan-DoCheck- Act (PDCA), Work Breakdown Structure (WBS), Program Evaluation Review Technique (PERT), Gantt Chart, Uncertainties and Risk Assessment, Communication Planning, Scheduling, Fishbone Analysis, Network Diagram, and Budgeting. The location of the solar shade is on the car park of the University Library. As for the design and development of the solar shades, three design options are developed and proposed. Each design has its own strengths and weaknesses. After a process of selection, which takes into account the requirements that the university imposes on the SSDIP, the best solar shade design is selected.
      11  1
  • Publication
    5S assessment using rasch measurement model: a case study in advanced manufacturing industry
    (Universiti Malaysia Perlis (UniMAP), 2016)
    Nur Juwairiyah Mohd Nasir
    5S practices a common practice in the company and purposely to develop awareness among the team member and build responsibility of normal and abnormal conditions in their workplace area (Brophy, 201 3). The 5S element are Sort, Set in Order, Shine, Standardize and Sustain. The study is only focus on 5S practices because in the Laying Up process, most of the activities are manually conducted which means the performance and quality of works depends on the operators' skills. The study was composed with two main objectives which are; firstly is to assess the current 5S practices in term of understanding, knowledge and actual practices in Lay Up process area using questionnaire-based survey and observation methods and analysed in Rasch Measurement Model (RMM) and secondly is to recommend the improvement strategies to improve the 5S practices based on analysis results of Rasch Measurement Model (RMM). In evaluating the current state 5S practices, the quantitative method which is survey had been created. Before the real survey had been launched, the pilot survey had been distributed to test the reliability of person and items and also act as trial to make better questionnaire's structure for real survey. Then, the realsurvey had created to analyse their knowledge, understanding and practices of every elements of 5S practices; sort, set in order, shine, standardize and sustain. The analysis showed that, most of the respondents have good knowledge, understanding and practice these 5S elements in their routine works. Next to analyse either these respondents applied or practiced the 5S practices in their work activities, observation based analysis had been done. From the observation based analysis made, it had proved that what are the respondents answered is parallel to what are they doing in their routine works. Lastly, some improvement strategies are also suggested such as training, publish the RWP (Residence Work Plan), complimentary and punishment and Deming's PDCA (Plan-Do-Control-Act).
      1  15
  • Publication
    Optimization of machining parameters in wedm of stainless steel AISI 316 based on taguchi method
    (Universiti Malaysia Perlis (UniMAP), 2016)
    Adel Saleh Omar Warregh
    In this study, the EDM wire cut machine model AQ327L was used to cut the specimens made from AISI 316 based on the selected parameters setting. One thickness of specimens with 6 mm was used and brass wire electrode diameter (0.25 mm). The material removal rate (MRR) was measured by determining the weight difference before and after cutting process (WRW), then divided by machining time. The surface roughness (Ra) was measured by MITUTOYO CS-31 00 device. The experiment is conducted according to Taguchi's L9 OA, with input parameters as pulse on time, wire tension and peak current their response on MRR, Ra and kerf width. Parameter optimization is done by Taguchi method, with criteria maximum MRR, minimum surface roughness and kerf width. The optimum value of SIN ratio of MRR is (19.02 mm3 /min) at value of pulse on time (65JJ.s), wire tension (140gf/mm2 ) and peak current (lOA), while the optimum value of SIN ratio of Ra is (- 7.99JJ.m) at value of pulse on time (65JJ.s), wire tension(160gf/mm2) and peak current (30A). Also the optimum value of SIN ratio of KW is (8.56mm) at value of pulse on time (65JJ.s), wire tension (140gf/mm2) and peak current (1 OA). The percentage contribution of MRR is maximum (65.8%) for obtaining and minimum (3.4%) value. Also, the percentage contribution of Ra is maximum (75.05%), and minimum (9.73%), while the percentage contribution of kerf width is maximum (66.4%) and minimum (4.0%). The result indicate that the pulse on time is the most significant parameter, followed by the peak current and wire tension for both MRR, Ra and kerf width. The predicted value for MRR at optimal parameter sitting is (8. 93 mm3/min) and the experimental average actual value is (8.22mm3/min), so the above mathematical prediction for MRR using MINITAB 17 is validated by confirmation experiment with percentage error (7.9%), while predicted value for Ra is (2.51JJ.m) and average actual value is (2.407JJ.m) with percentage error (4.1 %), but predicted value for kerf width is (0.373mm), and average actual value is (0.365mm) with percentage error (2.1 %). Error observed was within 10% allowed for the results.
      3  9