Control method for butterfly power generation two-axis tracking structure based on polar axis coordinate system

The invention relates to a control method for a butterfly power generation two-axis tracking structure based on a polar axis coordinate system and belongs to the field of solar power generation. The control method for the butterfly power generation two-axis tracking structure based on the polar axis coordinate system is characterized by including the steps of (1), setting initial values; (2), computing n and delta; (3), computing omega sr, omega ss, tss and tsr; (4), computing tz, judging whether tz>/=tsr or not, executing a step (5) if yes, and returning to the step (4) if not; (5), returning to the step (5) if it is cloudy, and executing a step (6) if it is not cloudy; (6), stopping the structure if a limit switch is touched, and executing a step (7) if the limit switch is not touched; (7), computing gamma s, adjusting alpha s and the gamma s, and executing a step (8); (8), comparing R2, R2', R2'' and R2''', judging whether R2= R2'= R2''= R2''' is true or not, if yes, keeping the alpha s and the gamma s and executing a step (13), and executing a step (9) if not; (9), judging whether R2/= R2' /= R2'' /= R2''' is true or not, if yes, adjusting the alpha s and the gamma s sequentially and executing the step (13), and executing a step (10) if not; (10), judging whether R2= R2' /= R2''= R2''' is true or not, if yes, adjusting the alpha s and executing the step (13), and executing a step (11) if not; (11), judging whether R2= R2'' /= R2'= R2''' is true or not, if yes, adjusting the gamma s according to the S and executing the step (13), and executing a step (12) if not; (12), seeking Rmin, adjusting the alpha s and the gamma s sequentially and executing the step (13); (13) judging whether delta t is terminated or not, executing a step (14) if yes, and returning to the step (13) if not; (14), judging whether tz>/=tss or not, stopping the structure if yes, and executing the step (5) if not.