摘要
经临界振荡法整定的PID控制器校正,机床闭环伺服系统的超调量仍高达13.27%。为使系统响应既平稳又快速,在临界振荡法的基础上采用正交实验法进一步优化控制器参数,控制因子水平值的选择依据单因素实验结果确定,超调量和上升时间两项指标通过灰关联度分析转为单项指标。经正交实验优化的PID控制器校正后,系统的超调量为3.03%,上升时间为0.1 960 s。
Overshoot of the closed-loop servo system of a machine tool still remains as high as 13.27%, though it is corrected by a PID controller, whose parameters are tuned only with critical oscillation. PID controller parameters based on critical oscillation are further optimized by orthogonal experiment, in which the controlling factors value are selected according to the univariate experimental results, and the two examined indexes--overshoot and rise time--are converted into one index through analysis of grey relational grade. The servo system corrected by PID controller where parameters are tuned by orthogonal experiment results in better dynamic performance with overshoot of 3.03% and rise time of 0. 1 960 second, showing that the method is effective.
出处
《机械科学与技术》
CSCD
北大核心
2011年第6期1028-1032,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
淮海工学院自然科学基金项目(Z2008007)资助
关键词
伺服系统
临界振荡法
PID
正交实验
灰关联度
servo system
critical oscillation
PID
orthogonal experiment
grey relational grade
