碩士 / 國立臺灣科技大學 / 機械工程系 / 93 / Presently, the state of research of underwater vehicle is striding forward to small size and with functions of underwater image detection and piping probe. This study focuses mainly on developing the meso-scale underwater vehicle and exploring the practicability of manufacturing meso-scale underwater vehicle and integrating systems of vehicle, including motor selection, propeller design, manufacturing and thrust testing, hull design and manufacturing, and last carrier fabrication. In order to highlight the feature of the meso propellers, successfully manufacture the streamlined hull, and take both material and process into consideration, this study chooses the most suitable process, SDM（Shape Deposition Manufacturing）, based on nontraditional machining and material qualities.
First of all, this study chooses the appropriate size and properties for the motor, and then designs the hull. The propeller for the meso-scale underwater vehicle is designed based on the theory of axial-flow fan and with the aids of NACA airfoil. Besides, CAD/CAM software is applied to carry out the model constructing, the process planning and the tool path simulation. Regarding the propeller and hull manufacture, SDM process is utilized of polymer material and three axis CNC machine. The maximum of contact area between the airfoil and the hub is 0.9㎜, this causes the problem that the concentration of the cutting force results in the break in the airfoil. After testing, this problem can be solved by selecting spiral pattern in the menu of cutting path.
After installing the propeller on the motor, the thrust can be calculated with the Hooke’s law（F=kx）based on the stretch distance of the spring pulled by the vehicle at the rotation rate of 1500 rpm. The value difference 2.8﹪derived from the numerical simulation software can be seen as the focus for future propeller design or process improvement. Moreover, this study also suggests that after assembling the vehicle, adjusting weight can make the vehicle operate more smoothly; and improving the design based on the underwater operation condition of the vehicle is necessary.
| Identifer | oai:union.ndltd.org:TW/093NTUST489071 |
| Date | January 2005 |
| Creators | Yu-shan Shen, 沈毓珊 |
| Contributors | Yih-lin Cheng, 鄭逸琳 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 70 |
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