จำนวน Repository ( 70 )

การสร้างและหาประสิทธิภาพชุดฝึกอบรมตามสมรรถนะวิชาชีพช่างบริการยานยนต์
การสร้างและหาประสิทธิภาพชุดฝึกอบรมตามสมรรถนะวิชาชีพช่างบริการยานยนต์

The purpose of this study were to conduct and to evaluate the effectiveness of Automotive service technician The research procedure starting by collect and study document : research paper international occupational standard (Oklahoma Department of Career and Technology Education) and competency needed in Motorcycle Mechanic suggested by 7 person who working in this field. All data will be referred for behavior objectives list and learning materials design such as information sheet practice operation sheet for experience skill training evaluation sheet with evaluation criteria which clearly listed topics. The sample group in this study was 19 PAJAMANGALA UNIVERSITY OF TECHNOLOGY PHRANAKHON Faculty of Industrial Education in academic year 2 0 1 7 . Pre-test will be given before training steps according to the manual. The students will do the test after each training topic. At the training end Post-test will be given and student final assignment will be evaluated by 5 experts. The Pre-test and Post-test scores will be statistical mean difference test. The research results found that the student final assignment competencies evaluation in percentage mean score was 87.55/94.66/85.13 that higher than 80/80/80 about the expectation. The test percentage mean score after training each topic was 92.11 that higher than 90 about the expectation. The percentage mean score difference test between before and after training was significant at statistical level .01 and the after training score was higher than before training score.

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การเปรียบเทียบคุณสมบัติทางกลของวัสดุที่ผลิตจากเส้นใยธรรมชาติเพื่อใช้ผลิตชิ้นส่วนภายในรถยนต์
การเปรียบเทียบคุณสมบัติทางกลของวัสดุที่ผลิตจากเส้นใยธรรมชาติเพื่อใช้ผลิตชิ้นส่วนภายในรถยนต์

This research aims to compare the mechanical properties of materials made from hyacinth pineapple and sugarcane fibers and also to study the feasibility of producing automotive interior parts from natural fibers. The 9 specimens that made from natural fiber such as water hyacinth pineapple leaf fiber sugar can and husk and there are also three different binders: glue polymer and polymer plus hardener were produced. All of specimens were controlled mass and density. The specimens were classified into 2 types: 1) thin type with a size of 3.5x14x1 cm in order to test the flexibility 2) thick type with a size of 6.5x6.5x20 cm for testing the ability to absorb energy. The test results showed that the specimen produced from sugar cane and husk using adhesive bonding able to receive bending stress and modulus of elasticity more than other specimens up to 80.63% and 69.19% respectively. While the ability to absorb energy from work piece made from pineapple leaf fiber and husks using polymer bender was able to absorb energy more than other work pieces 51.58%.

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การออกแบบเครื่องทอพรมอเนกประสงค์แบบกึ่งอัตโนมัติเพื่อพัฒนาผลิตภัณฑ์เคหะสิ่งทอ เชิงวัฒนธรรมที่นำไปสู่ประชาคมเศรษฐกิจอาเซียน
การออกแบบเครื่องทอพรมอเนกประสงค์แบบกึ่งอัตโนมัติเพื่อพัฒนาผลิตภัณฑ์เคหะสิ่งทอ เชิงวัฒนธรรมที่นำไปสู่ประชาคมเศรษฐกิจอาเซียน

The purposes of this research were to study semi-automatic versatile carpet weaving data of central region villagers studies problems and requirement in the semi automatic versatile carpet weaving to be effective fulfill requirements for the most weavers and led the data were to study analyze to create prototype of a semi automatic versatile carpet weaving to develop household textile products in culture that led to the ASEAN Economic Community and lead the knowledge to transfer technology by workshops. This research was the development of experimental research by fieldwork survey from 25 Nam Tao Temple sampling of semi automatic versatile carpet weaver groups in top central at Tambon Wat Nam Tao of Maharat district in Ayutthaya province and choose the specific type with the weaving group and semi automatic versatile carpet weaving from 25 Nong Ngu Hau weaver groups at Tambon Bang Pra Khru of Nakhon Luang district in Ayutthaya province. Total weaver groups who used this carpet weaving jacquard were 50 persons. Results indicated that testing for the satisfaction efficient of villagers were satisfied to the semi automatic versatile carpet weaving jacquard in period that can woven more quickly. Including setting the reel head to stand on the warp by the head reel of carpet loom and the carpet roll can make carpet in 90 centimeters width and applied to household textiles such as carpet rugs wall rugs and decorative carpet. The semi automatic versatile carpet weaving jacquard can weave 4 hooks. They were made the minute patterns exquisitely and various woven. They have added the convenience of a device to lock the both sides of warp reel head and the jacquard structure were increased strength with a square box steel and the Z. It can also adjust the space of the seat movement when weaving according to individual aptitude. It can be moved easily and reduced the lack of warp yarn. It was set easier in new warp yarn by the hooking after setting the warp yarn jacquard was finished. It was convenient to roll the finished carpet weaving by using lever handle to simultaneously rotate on both sides of gear axis. Using a foot pedal lever to raise the hooks raise the sway hooks to lift up follow to the weaving rhythm. It was production costs close to the price of the similar carpet the effective yield rapidly and worth. It was suitable for the beginner weavers or a new person who had basic woven would be weaving rapidly and the carpet weaving quality was good. Due to its rotating axis and lock system were made of cogs that helped to lock the beater or comb teeth for solidness and strength to handle and help facing fabric regularly. Summary this research was is related to the methodology technique and carpet weaving process. The essential was to reel the warp yarn and set the hooks that was minuteness in the deeply technical promotes the concept to develop the semi automatic carpet weaving with electrical system and motor to help labor saving able to reduce and solve period problems too much. So the semi automatic versatile carpet weaving design will be the basic of knowledge direct that can lead to the development of devices patterns and cultural household textile products leading to the ASEAN Economic Community in the next occasion.

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การตรวจติดตามเครื่องจักรบกพร่องในโรงงานผลิตชิ้นส่วนรถยนต์โดยใช้ตัวแบบฮิดเด็นมาร์คอฟแบบเบย์
การตรวจติดตามเครื่องจักรบกพร่องในโรงงานผลิตชิ้นส่วนรถยนต์โดยใช้ตัวแบบฮิดเด็นมาร์คอฟแบบเบย์

The objectives of this research are to propose a proper model for detecting defective machines in auto parts factories to apply the proposed model to the defective product data and to investigate the factors influencing on the machine producing defective products. A Bayesian hidden Markov model (HMM) is adopted. The results show that if the number of defective products increases the machine will be in the hidden bad state. The probability of changing from a hidden bad state to a hidden good state is higher than the probability of changing from a hidden good state to a hidden good state. The highest probability that the machine will be in a good state is at the work process 4 followed by 1 3 and 2 respectively. The highest probability that the machine will be in hidden good state is at the Worker no. 10 followed 9 3 12 7 2 1 6 11 4 8 and 5 respectively and The highest probability that the machine will be in the hidden good state is at the product type 1 followed by 2 and 3 respectively.

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การหาค่าพารามิเตอร์ของตัวควบคุมแบบสัดส่วนบวกอินทิกรัลแบบ อัตโนมัติด้วยขั้นตอนวิธีเชิงพันธุกรรมสำหรับระบบการขับเคลื่อนมอเตอร์ซิงโครนัสชนิดแม่เหล็กถาวร
การหาค่าพารามิเตอร์ของตัวควบคุมแบบสัดส่วนบวกอินทิกรัลแบบ อัตโนมัติด้วยขั้นตอนวิธีเชิงพันธุกรรมสำหรับระบบการขับเคลื่อนมอเตอร์ซิงโครนัสชนิดแม่เหล็กถาวร

Proportional plus integral controller has been widely used in permanent magnet synchronous motor (PMSM) drive system due to its simple structure while achieving zero steady-state error. However finding out the optimal parameters of the controller is not an easy task. For this reason this paper presents an automated optimization of proportional plus integral controller for permanent magnet synchronous motor drive system using genetic algorithms. Simulation and experimental results verify the effectiveness than ones of the trial and error method.

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