IMC-PID控制器参数扩展整定方法的改进

对用于时滞对象的IMC PID控制器参数扩展整定方法进行了改进 ,修正了扩展整定公式 ,评价了扩展整定方法中的不足。

SOPDT模型不确定性界及其在内模控制器设计中的应用

In the design of IMC controller or other robust controller for robust performance in process control application, one of the necessary conditions is model (or process) uncertainty bound. The method of calculating model (or process) uncertainty bound for the first order lag process with dead time (FOPDT) in the robust controller design is reported in literatures. Up to the now, however, no any analytical method of calculating model (or process) uncertainty bound can be used in the second order lag process with dead time (SOPDT). Therefore, the design of the IMC controller for robust performance used to SOPDT also can not be simply achieved.By using first order Pade approximation for the dead time,an analytical method of calculating model (or process) uncertainty bound for SOPDT in the robust controller design is given for the first time.By using this bound, IMC controller design for robust performance can be made satisfactorily.

基于多样化教学的体育课堂实践策略

根据学习内容的特点和学生已有的能力基础,有目的地开展分组教学可以有效激发学生积极主动参与学习的热情, 团队的引进增强了体育学习主体间互动交往的空间,实现体育知识与能力及情感的共同发展,而游戏化的课堂教学与多媒体辅助 教学,更是让体育课堂在情境化与艺术化中激起“教”与“学”灵动的火花.

反思型体育教师简谈

教师的成长与发展是实现新时期教育目标的根本保证,作为肩负学校体育教学与育人双重任务的体育教师,自然也应该顺应时代的要求,打破传统的教师发展思维,创造性地开展教学教育工作,逐渐实现从＂教书匠型＂、＂经验型＂向＂专家型＂、＂学者型＂的转变,教学反思则是实现这一目标的重要途径。