Performance Monitoring and Diagnosis of Multivariable Model Predictive Control Using Statistical Analysis

Abstract

Abstract: A statistic-based benchmark was proposed for performance assessment and monitoring of model predictive control; the benchmark was straightforward and achievable by recording a set of output data only when the control performance was good according to the user’s selection. Principal component model was built and an auto-regressive moving average filter was identified to monitor the performance; an improved T2 statistic was selected as the performance monitor index. When performance changes were detected, diagnosis was done by model validation using recursive analysis and generalized likelihood ratio (GLR) method. This distinguished the fact that the per-formance change was due to plant model mismatch or due to disturbance term. Simulation was done about a heavy oil fractionator system and good results were obtained. The diagnosis result was helpful for the operator to improve the system performance.

Key words: predictive control, performance monitoring, diagnosis, principal component analysis

摘要： A statistic-based benchmark was proposed for performance assessment and monitoring of model predictive control; the benchmark was straightforward and achievable by recording a set of output data only when the control performance was good according to the user’s selection. Principal component model was built and an auto-regressive moving average filter was identified to monitor the performance; an improved T2 statistic was selected as the performance monitor index. When performance changes were detected, diagnosis was done by model validation using recursive analysis and generalized likelihood ratio (GLR) method. This distinguished the fact that the per-formance change was due to plant model mismatch or due to disturbance term. Simulation was done about a heavy oil fractionator system and good results were obtained. The diagnosis result was helpful for the operator to improve the system performance.

关键词: predictive control;performance monitoring;diagnosis;principal component analysis

ZHANG Qiang, LI Shaoyuan. Performance Monitoring and Diagnosis of Multivariable Model
Predictive Control Using Statistical Analysis
[J]. .

张强, 李少远. 基于统计分析的多变量预测控制性能检测与诊断
[J]. CIESC Journal.

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Performance Monitoring and Diagnosis of Multivariable Model
Predictive Control Using Statistical Analysis

基于统计分析的多变量预测控制性能检测与诊断

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