| Summary: | 碩士 === 國立成功大學 === 航空太空工程學系碩士在職專班 === 102 === This study has developed two-axis solar tracking system with horizontally moving base, which can accommodate vehicle motion or avoid obstructing shadow and achieve better power generation efficiency. The system receives inputs from four photo resistor sensors to determine the general direction of the sun and drives two DC motors, one for azimuth angle and the other for elevation angle, to track the solar motion and keep the solar panel, which is setting on the tracking mechanism, facing toward the sun. Two micro-processors are used to control the system and transfer system data to a monitoring PC. The control law for both motors is a simple position control in sequential adjustments with azimuth angle first and elevation angle later. Presently, most solar panels made from crystalline silicon and used by general public do not require very high pointing accuracy to convert rated solar energy to electricity. The proposed design shall be a convenient and economical solution to easily gain more conversion from sun light to electricity for the same or similar type of solar panels. Also, the moving base provide one more degree of freedom to avoid blocking element in the sky or a test bed to exam the efficacy of the two-axis tracking system on large surface moving vehicles, such as ships or desert travelers. Experimental results are included to show the functions of the system, which indicate the proposed simple structure can achieve good tracking performance.
Key words: two-axis solar tracking system, azimuth angle and elevation angle, moving base, micro-processors, crystalline silicon solar panels.
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