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:0.001103s ]
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:0.061935s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001036s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001130s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000946s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003115s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000822s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003851s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015860s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001187s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 7038 [ RunTime:0.016408s ]
