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In order to solve how to more efficient use of solar energy,by observing the position of the sun in the sky and the sun trajectory scientific analysis,a comprehensive forecast operating position of the sun and reproducible methods is presented through simulation platform. In the system,the sun’s elevation angle and azimuth are calculated by SCM based on the input date,and converted it to the number of motor drive pulses to achieve the motor driven actuator frequency conversion at different times at different rates movement so that the analog source to reach a predetermined position; at the same time the actual motor encoder pulse are measured on a regular basis in order for the system to correct and improve the stability and accuracy of the system,reducing errors. Experimental results show that the system can make the platform for analog light source in accordance with the expected trajectory,the program is designed with reliability.