Robust Controllers for Grinding Circuit

Yahmedi, S.; Pomerleau, A.; Hodouin, D.

doi:10.1016/s1474-6670(17)35867-6

Cited by 3 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ore hardness is increased by 80% at time 200 min until the end of simulation and the rock fraction is increased by 90% at time 800 min until the end of simulation. The disturbance sizes are selected based on the investigation of the disturbance scenarios used in for example Hulbert et al (1990), Yahmedi et al (1998) and Coetzee et al (2009). Note that both the hardness and rock fraction disturbances have two components.…”

Section: Functional Performance Of the Pid Controllersmentioning

confidence: 99%

Economic performance assessment of two ROM ore milling circuit controllers

Wei¹,

Craig²

2009

Minerals Engineering

View full text Add to dashboard Cite

a b s t r a c tEconomic performance assessment of control systems is receiving increasing attention in both academia and industry. A relevant framework is proposed in Bauer and Craig (Bauer, M., Craig, I.K., 2008. Economic assessment of advanced process control -a survey and framework. Journal of Process Control 18 (1), 2-18) based on a comprehensive survey of the methods for economic analysis of advanced process control systems. The framework provides a formal procedure for the economic assessment of control systems. A practically motivated simulation study is used to cast the economic performance assessment of a nonlinear model predictive controller and three single-loop PID controllers for a run-of-mine milling circuit into this framework. Performance functions of the milling circuit, which dynamically relate the circuit process variables to monetary values, are developed based on a survey study on milling circuits and an in-depth literature study.

show abstract

Section: Functional Performance Of the Pid Controllersmentioning

confidence: 99%

Economic performance assessment of two ROM ore milling circuit controllers

Wei¹,

Craig²

2009

Minerals Engineering

View full text Add to dashboard Cite

show abstract

“…The ore hardness is increased by 80% at time 200 minutes until the end of simulation and the rock fraction is increased by 90% at time 800 minutes until the end of simulation. The disturbance sizes are selected based on the investigation of the disturbance scenarios used in for example Hulbert et al (1990), Yahmedi et al (1998) and . Note that both the hardness and rock fraction disturbances have two components here.…”

Section: Electrical Electronic and Computer Engineering University Omentioning

confidence: 99%

Development of performance functions for economic performance assessment of process control systems

Wei

Craig

2009

Africon 2009

View full text Add to dashboard Cite

Degree: PhD (Electronic Engineering) SummaryEconomic performance assessment (EPA) of control systems is receiving increasing attention in both academia and industry. It addresses the estimation of the potential benefits resulting from control upgrade projects and monitoring and improvement of economic performance of the control system. Economic performance of control systems can often be related to crucial controlled variables dynamically and when controlled variables move away from an optimal operating point either more profit will be made or more cost will be incurred. This relation can be modelled by performance functions (PFs). When the multivariate nature of a process's economic model is not considered, PFs of different controlled variables are referred to as individual performance functions. Otherwise, PFs of dependent controlled variables are referred to as joint performance functions.PFs play an important role in the latest techniques of EPA. There appears, however, to be no systematic method for developing PFs. The lack of such a method restrains further research into EPA, as without well-established PFs an EPA cannot be conducted smoothly and therefore cannot effectively support decision-making for management. The development of PFs is a bottleneck in the further research into EPA. Furthermore, the multivariate nature of processes has not been taken into account sufficiently as far as the relevant literature is concerned, which hampers the accuracy of PFs and accordingly the accuracy of economic assessment results.The contributions of this thesis lie in the following aspects:• A methodology for developing PFs is proposed, based on the PF development for an electric arc furnace, a grinding mill circuit and a stage of a bleach plant.• A comprehensive case study of an EPA of three controllers of a grinding mill circuit is conducted using a newly published framework to show the significance of PFs and how to perform an EPA systematically.• The current practice and guidelines on the control and functional/economic performance i assessment of grinding mill circuits are captured using a survey study.The multivariate nature of an electric arc furnace's economic model is investigated and joint performance functions are built based on individual performance functions. A multivariate economic assessment is conducted that shows how joint performance functions can help to provide a more accurate estimate of the economic performance of a controlled process.A web-based survey study on grinding mill circuits in mineral processing industries is conducted. One of its objectives is to obtain general PFs of grinding circuits. The survey results provide instructive insight into the PFs of grinding circuits. Furthermore, an in-depth literature review is conducted and the relationship between the product's particle size distribution of grinding mill circuits and mineral recovery in downstream flotation circuits is revealed. The PFs of a grinding mill circuit being considered are formed, based on the survey results and litera...

show abstract

Grinding Mill Circuits - A Survey of Control and Economic Concerns

Wei

Craig

2008

IFAC Proceedings Volumes

View full text Add to dashboard Cite

Robust Controllers for Grinding Circuit

Cited by 3 publications

References 10 publications

Economic performance assessment of two ROM ore milling circuit controllers

Economic performance assessment of two ROM ore milling circuit controllers

Development of performance functions for economic performance assessment of process control systems

Grinding Mill Circuits - A Survey of Control and Economic Concerns

Contact Info

Product

Resources

About