此程序为三环伺服系统的PID控制算法仿真，其中三环为位置环、速度环和电流环。-procedure for the three-ring servo system PID control algorithm simulation, which tricyclic ring for position, velocity and current loop Central.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002047s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.088039s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002444s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001956s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002259s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003635s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002003s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003331s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014510s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002466s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 7038 [ RunTime:0.001286s ]
