| Summary: | 碩士 === 國立虎尾科技大學 === 自動化工程研究所 === 98 === Based on the demand of fast developing technology, the wind tunnel experiment has extended its current range, from the application of the aerospace engineering to other engineering fields. Moreover, according to the well developed data processing and the need of accuracy in engineering, the wind tunnel experiment nowadays is able to serve as a more precise engineering tool.
Therefore, the purpose of this study is to develop a low cost optical angular precision measurement and control system for wind tunnel facilities. We apply a simple and low cost laser and PSD sensor module to receive precise results from the designed axis-rotation platform of the model. The operator could monitor the relation between the attitude and its related data, and thus, the quality of the experiment will be enhanced. Also, with the data derived from the simultaneous dynamic optical attitude feedback, these data could process the feedback compensation automatically in order to achieve the desired angle. The attitude of measured object could accordingly be precisely kept at the desired angle, and then the repeatability of experiments will be promised.
The measuring system consists of Laser and PSD. Measured by PSD, the axis-rotation of the model can be obtained. The design of the platform is based on the measuring system. And then, to programmed software of measure and control was for PSD and servo motor. In finally, the full system was verified by the wind tunnel experiment.
By the wind tunnel experiment to verified, the developed system was available, and angle error is less than 0.23°. The system will enhance the accuracy of the wind tunnel experiment applied in every possible field of engineering.
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