碩士 / 國立臺灣科技大學 / 機械工程系 / 94 / Middle-size and large-size underwater vehicles have been widely developed for underwater exploration and rescue. Smaller vehicles are still in the developing stage. This research focused on manufacturing a maneuverable meso-scale submarine propelled by two propellers. The feasibility of the fabrication approaches and system integration were investigated, including motor selection, propeller design and manufacturing, propeller thrust testing, hull design and manufacturing, and finally the underwater testing.
First of all, an appropriate motor was chosen and then the hull of the submarine was designed accordingly. Based on the theory of axial-flow fan and NACA airfoil, the propeller for was designed. In order to fabricate the minute features of the propellers, outside streamlined geometry of the hull, and inside features of the hull, SDM (Shape Deposition Manufacturing), a layered manufacturing process, was selected. Three-axis CNC machine was utilized in SDM to define the geometry of each layer after polymer part material or wax support material was cast. CAD/CAM software was applied to constructing 3D models, process planning, and tool path simulation for each SDM layer.
The thrust of propeller was tested using Hooke’s law. Interpolating method was further applied to find the rotational speed of the motor and the thrust under a measured voltage. After assembly, the submarine was tested underwater to perform moving forward and turning right or left. The two 2600RPM propellers generated totally 18.41 g thrust to propel the 33g meso-scale submarine forward. The velocity was 0.07m/s. By adjusting the RPM of the two propellers, a torque was generated to maneuver the submarine to right or left.
| Identifer | oai:union.ndltd.org:TW/094NTUS5489060 |
| Date | January 2006 |
| Creators | Jia-hung Lai, 賴佳宏 |
| 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 | 133 |
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