Evaluation For Drive Precision of Large Telescope

It's dissertated the relationship of the drive precision of large telescope, optical quality of the telescope and Seeing of atmosphere in the observatory in the article.And it gives the evaluation for drive precision of large telescope from mathematics matrix.If the value of evaluation for drive precision is high, it shows that the practical error of drive is small.Or it shows the practical error of drive is large. Based on 2.16 meter telescope, the right ascension drive gear system, optical system and Seeing in Xinglong observatory, a value of evaluation of this drive system in the current condition is calculated.Three other values of evaluation are calculated for supposed conditions.From that we can infer the basic and super standard limits of evaluation for drive precision of the drive precision error which is required when building large telescope.