摘要
针对基于最小方差的性能评价准则由于只考虑时滞引起的性能限制,不适合对PID控制回路进行性能评价的问题,本文采用PID能实现最小方差控制准则,对四水箱控制系统进行性能分析,得到的性能指标比传统最小方差准则明显提高,控制器参数大大改善了过程的输出方差。实验表明,PID能实现最小方差准则能够为PID控制器的性能评价提供一个合理的评价基准,更说明其对特定类型控制器性能评价所具有的实际意义。
As Minimum Variance Benchmark considers only the time delay, which leads to the problem of the performance limitation and does not fit to PID controller’s performance assessment, PID Achievable Minimum Variance Benchmark is adopted in this paper to solve the problem of the abovementioned. The performance index increases obviously compared with the traditional index gained through Minimum Variance Benchmark in the fourtank control system. And the process output variance is reduced by the returning parameters,too. The experimental results not only show that PID achievable minimum variance can provide a reasonable performance benchmark for the PID controller but also indicate that there is more practical significance to study the performance assessment for specific type controllers.
出处
《计算机工程与科学》
CSCD
北大核心
2011年第2期164-167,共4页
Computer Engineering & Science
基金
江苏省高校自然科学基金资助项目(07KJB510042)
江苏省工业装备数字制造及控制技术重点实验项目(BM2007201)
关键词
性能评价
PID控制
四水箱控制系统
PID能实现最小方差
performance assessment
PID control
fourtank control system
PID achievable minimum variance benchmark
作者简介
王资法(1983-),男,山东青岛人,硕士,研究方向为控制系统性能评价。E-mail:zdhwang147@tom.com
张浞(1952-),女,陕西西安人,博士,教授,研究方向为过程工业的建模、优化与控制。E—mail:zhangshi@njut.edu.cn
薄翠梅(1973-),女,山西大同人,博士,副教授,研究方向为复杂工业过程的故障诊断与容错控制、化工过程建模与优化。