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Analysis of dual-rate inferential control systems

Dongguang Li, Sirish L. Shah, Tongwen Chen
2002 Automatica  
For a dual-rate control system where the output sampling interval is an integer multiple of the control interval, we propose a model-based inferential control scheme which uses a fast-rate model to estimate  ...  Comparing such an inferential controller with the corresponding fast single-rate controller, we conclude that the former is no better in disturbance rejection capability; however, in the presence of model-plant  ...  The contribution of the paper is as follows: • We propose a simple and practical inferential control scheme for dual-rate systems using fast single-rate models, and develop a lifted framework for analysis  ... 
doi:10.1016/s0005-1098(01)00295-3 fatcat:i5e6lk77xjcyxhhx57b4gx7ws4

Application of dual-rate modeling to CCR octane quality inferential control

Dongguang Li, Sirish L. Shah, Tongwen Chen, Kent Z. Qi
2001 IFAC Proceedings Volumes  
The goal of this paper is to study automating the control loop by developing a dual-rate inferential control scheme.  ...  In particular, for a dual-rate process with fast input updating and slow output sampling, we propose a polynomial domain method to identify a fast single-rate linear model based on dual-rate input-output  ...  In the rest of this section, we will develop a dual-rate inferential control algorithm for the system in (17).  ... 
doi:10.1016/s1474-6670(17)33849-1 fatcat:megut7dcf5go7limz5aruiremu

Application of dual-rate modeling to CCR octane quality inferential control

Dongguang Li, S.L. Shah, Tongwen Chen, K.Z. Qi
2003 IEEE Transactions on Control Systems Technology  
The goal of this paper is to study automating the control loop by developing a dual-rate inferential control scheme.  ...  In particular, for a dual-rate process with fast input updating and slow output sampling, we propose a polynomial domain method to identify a fast single-rate linear model based on dual-rate input-output  ...  In the rest of this section, we will develop a dual-rate inferential control algorithm for the system in (17).  ... 
doi:10.1109/tcst.2002.806433 fatcat:v4a3uf7tezgfpbdyqtvinqebrm

Interpretations of and options in dual-rate predictive control

J.A. Rossiter, J. Sheng, T. Chen, S.L. Shah
2005 Journal of Process Control  
First it gives an overview of common techniques deployed in the design of predictive control and then discusses how these have been modified for use on dual-rate systems.  ...  The main purpose of this paper is to give insight into dual rate predictive control.  ...  Summary of lifting based approaches to dual-rate control Lifting is a convenient mechanism for handling the algebra and analysis of a periodically time varying control law that arises with dual-rate systems  ... 
doi:10.1016/j.jprocont.2004.06.005 fatcat:v2jn4mdgubdppgli5m4ml2ngie

Presence & placement

Christopher Plaue, John Stasko
2009 Proceedinfs of the ACM 2009 international conference on Supporting group work - GROUP '09  
Teams completed the same task using either a single display, side-by-side dual, or opposing dual shared displays.  ...  Relatively little is known about how the presence and location of multiple shared displays changes the performance and dynamics of teams collaborating.  ...  However, this did not seem to impact the rate of pointing gestures between the two dual display conditions.  ... 
doi:10.1145/1531674.1531701 dblp:conf/group/PlaueS09 fatcat:wdeglvx77fb6ldbtiv62qtwj4e

Addressing Health Equity Through Action on the Social Determinants of Health: A Global Review of Policy Outcome Evaluation Methods

Janice Lee, Ashley Schram, Emily Riley, Patrick Harris, Fran Baum, Matt Fisher, Toby Freeman, Sharon Friel
2018 International Journal of Health Policy and Management  
of stunting and malnutrition in children; pregnant women with anaemia before and after the Millennium Development Goals (following the evolution of healthcare system); comparing between rural/urban areas  ...  and midwives; national health insurance coverage; percentage of skilled deliveries, prenatal visits, contraception and vaccination prevalence; neonatal, infant and under-5, maternal mortality rates; proportion  ...  -2007; Secondary data Analysis Descriptive analysis: graphical analysis + statistical summaries; Inferential analysis: multivariate regression model Outcome(s) Intermediate: Health care system (  ... 
doi:10.15171/ijhpm.2018.04 pmid:29996578 pmcid:PMC6037500 fatcat:lfxlqvco4ja45mf2tam37pesoq

Artificial Intelligence for Inferential Control of Crude Oil Stripping Process

Mehdi Ebnali, Mehdi Shahbazian, Houshang Jazayerirad
2018 Iranian Journal of Oil & Gas Science and Technology  
In this paper, we have used a novel inferential control approach base on adaptive network fuzzy inference system (ANFIS) for stripping process.  ...  In addition, inferential control by the implementation of ANFIS-based online composition estimator in a cascade control scheme is superior to traditional tray temperature control method based on less integral  ...  sample time delay; Control strategy and results On the basis of the control analysis reported in section 3.1, the inferential control strategy of the column shown in Figure 8 was adopted.  ... 
doi:10.22050/ijogst.2017.54928.1337 doaj:aec606c9f35846b18ea2931239438319 fatcat:rwndf7hoyzdehjsg6ybbazrxqq

Identification of dual-rate systems based on finite impulse response models

Feng Ding, Tongwen Chen
2004 International Journal of Robust and Nonlinear Control  
Two identification algorithms, a least squares and a correlation analysis based, are developed for dual-rate stochastic systems in which the output sampling period is an integer multiple of the input updating  ...  The basic idea is to use auxiliary FIR models to predict unmeasurable noise-free (true) outputs, and then use these and system inputs to identify parameters of underlying fast single-rate models.  ...  Li et al. applied dual-rate modelling to Octane quality inferential control for petroleum production [3, 5] .  ... 
doi:10.1002/rnc.942 fatcat:rtg7hjqztzcnlafnbqb3dixqyi

Identification of dual-rate systems based on finite impulse response models

Feng Ding, Tongwen Chen
2004 International Journal of Adaptive Control and Signal Processing  
Two identification algorithms, a least squares and a correlation analysis based, are developed for dual-rate stochastic systems in which the output sampling period is an integer multiple of the input updating  ...  The basic idea is to use auxiliary FIR models to predict unmeasurable noise-free (true) outputs, and then use these and system inputs to identify parameters of underlying fast single-rate models.  ...  Li et al. applied dual-rate modelling to Octane quality inferential control for petroleum production [3, 5] .  ... 
doi:10.1002/acs.820 fatcat:mqe5fecgsvfidicgcarat7y2iu

A GRADIENT BASED ADAPTIVE CONTROL ALGORITHM FOR DUAL-RATE SYSTEMS

Feng Ding, Tongwen Chen
2008 Asian journal of control  
In this paper, using a polynomial transformation technique, we derive a mathematical model for dual-rate systems.  ...  Based on this model, we use a stochastic gradient algorithm to estimate unknown parameters directly from the dual-rate input-output data, and then establish an adaptive control algorithm for dual-rate  ...  dual-rate modeling to Octane quality inferential control [9] .  ... 
doi:10.1111/j.1934-6093.2006.tb00283.x fatcat:qhc2t3e2czhunhicf244dopzpy

A retunable PID multi-rate controller for a networked control system

Antonio Sala, Ángel Cuenca, Julián Salt
2009 Information Sciences  
Index terms: Communication systems, multi-rate control systems, delay effects, field buses Introduction Networked Control Systems (NCS) [26, 12, 10, 25] are control systems in which different devices (  ...  This paper introduces a control strategy based on retuning a multi-rate PID controller in accordance with the variable delays detected in a networked control system, in order to avoid a decreased control  ...  The performance improvements of this control strategy over single-rate controllers and over nonscheduled dual-rate controllers have been illustrated in a simulation example.  ... 
doi:10.1016/j.ins.2009.02.017 fatcat:p5oxzu5smbhu5ix7slysw3437a

Modelling and Control of Reactive Distillation Systems

Moses O. Tadé, Budi H. Bisowarno, Yu-Chu Tian
2004 IFAC Proceedings Volumes  
Strategies to tackle the control problems associated with complex dynamics are also discussed. RD for ETBE production is used as a case study.  ...  In this work, the status of the current modelling techniques and their significance on process development are discussed.  ...  Regarding control of RD systems, selection of control schemes including the measurable inferential temperatures has crucial role on the overall control performance.  ... 
doi:10.1016/s1474-6670(17)38706-2 fatcat:q6s6sqiwvfccxknycorenkvmoi

Nonlinear model predictive control of a reactive distillation column

Rohit Kawathekar, James B. Riggs
2007 Control Engineering Practice  
The steady state gain analysis was performed to analyze the effect of different manipulated variables on the control variables of the system.  ...  Dual-ended composition PI control for unmeasured feed rate disturbance rejection Figure 4 . 2 42 Dual-ended composition PI control for unmeasured feed rate disturbance rejection resulted into similar  ... 
doi:10.1016/j.conengprac.2006.07.004 fatcat:l5ns75ck6vg7delnfx4n5migxi

Page 467 of Psychological Abstracts Vol. 82, Issue 1 [page]

1995 Psychological Abstracts  
Results support a dual-dimensional view of control. 3792. Sanchez, Juan I. & Levine, Edward L.  ...  A contingency approach, where limitations concerning the use of rating decomposition and inferential training are outlined, should serve to inform future uses and theories of rating aids in job analysis  ... 

Page 603 of American Society of Civil Engineers. Collected Journals Vol. 112, Issue 4 [page]

1986 American Society of Civil Engineers. Collected Journals  
Transient response Transient Response Analysis of a Dual Cycle System, Amir Tavakoli, CO Sept. 86 p403-410.  ...  Games People Play with Cost Control in Australia, Ali Jaafari and Viktor K. Mateffy, CO Dec. 86 p566-581. Work Sampling Can Predict Unit Rate Produc- tivity, Fwu-Shiun Liou and John D.  ... 
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