摘要
控制系统性能的在线诊断作为控制系统性能评估的主要组成部分之一,对于保障控制系统的长期有效运行具有重要意义。控制回路振荡是控制性能下降的一种常见表现形式,而导致控制系统振荡的主要原因有控制阀非线性、控制器过调、模型对象失配和不可测周期性扰动等。对已有的控制系统性能诊断方法按照是否存在振荡情况分别进行了总结,特别对回路振荡的检测与性能诊断方法进行了回顾分析。最后得到基于振荡检测的控制回路性能诊断流程。同时提出今后控制性能诊断领域的发展方向是从控制性能评价指标中获得更多的控制系统性能诊断信息,在统一框架内形成综合的性能诊断方法,从而确定性能恶化的原因。
Online assessment and diagnosis technology of control system performance is important to ensure long-term effective operation of control system.Control loop oscillations are the most prominent indication of control performance degradation.Reasons for the oscillation in the process are mainly valve non-linearity,aggressive controller tuning,model-plant mismatch and unmeasured periodic disturbance.Methods of control system performance diagnosis are summarized under oscillation and non-oscillation conditions,especially the methods for detecting loop oscillation and discriminating the origin of oscillation in the process industry are analyzed.Therefore the performance diagnosis routine of control loops is obtained based on oscillation detection.Future research may focus on finding more diagnostic information from performance indices,forming an integrated performance diagnose framework,to determine the source for performance deterioration.
出处
《控制工程》
CSCD
北大核心
2013年第S1期136-141,145,共7页
Control Engineering of China
基金
浙江省自然科学基金(Y105397)
关键词
性能诊断
振荡
控制阀非线性
模型对象失配
不可测扰动
performance diagnosis
oscillation
valve non-linearity
model-plant mismatch
unmeasured disturbance
