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Hybrid non-linear model predictive control of a run-of-mine ore grinding mill circuit

S. Botha, J.D. le Roux, I.K. Craig
2018 Minerals Engineering  
A hybrid non-linear model predictive controller (HNMPC) is developed for a run-of-mine ore grinding mill circuit.  ...  The methods discussed in this paper can be used to incorporate different types of discrete dynamics into advanced grinding mill circuit controllers due to the modular presentation of the model and HNMPC  ...  A variety of multivariable controllers were developed to achieve the optimal trade of between the control objectives and improvements in product quality, throughput, and power consumption [2, 12, 13,  ... 
doi:10.1016/j.mineng.2018.04.016 fatcat:uxduutuuxnc2rhp3lcb5cfvkji

Some aspects of industrial system identification

Alf J Isaksson
2013 IFAC Proceedings Volumes  
The most important and time consuming part of an industrial application of control is the modelling. It may take 50 per cent or more of the entire project.  ...  Therefore a major challenge for a control systems supplier like ABB is to constantly try to decrease the engineering effort for modelling.  ...  ACKNOWLEDGEMENTS The author gratefully acknowledges financial support from the Swedish Foundation for Strategic Research (SSF) --as part of the Process Industry Centre Linköping (PIC-LI), and  ... 
doi:10.3182/20131218-3-in-2045.00192 fatcat:ntkol7nsvzbjbcn65pp36no4rq

Selection of process control structure based on economics

Lawrence Narraway, John Perkins
1994 Computers and Chemical Engineering  
A mixed integer nonlinear optimal control problem is posed for the problem of selecting an optimal multiloop proportional-integral process control structure.  ...  This work considers the systematic selection of economically optimal square regulatory control structures from the set of all possible measurements and manipulated variables.  ...  A mixed integer nonlinear optimal control problem is posed for the problem of selecting an optimal multiloop proportional-integral process control structure.  ... 
doi:10.1016/0098-1354(94)80083-9 fatcat:eej63jhiwngilm35ysiy5eq5si

Designing agent collectives for systems with markovian dynamics

David H. Wolpert, John W. Lawson
2002 Proceedings of the first international joint conference on Autonomous agents and multiagent systems part 3 - AAMAS '02  
We also present a Taylor Series method for the fully general nonlinear case.  ...  The "Collective Intelligence" (COIN) framework concerns the design of collectives of agents so that as those agents strive to maximize their individual utility functions, their interaction causes a provided  ...  utility function to ensure good form for both utility (AU), loosely re-the difference between mined.  ... 
doi:10.1145/545073.545074 fatcat:wma4tzx6czfila354ckg7raaza

Fault detection for the Benfield process using a parametric identification approach

Johannes P. Maree, Ferdinando R. Camisani Calzolari
2012 International Journal of Automation and Control  
Acknowledge We would like to acknowledge to Bjørn Einar Bjartnes from Honeywell Company for helping in implementing of the RMPCT in UniSim. Acknowledgement  ...  Product specification fineness (y 2 ) is defined as 47% of the particles smaller than 47 �m. In order not to overload the ball mill, the throughput (y 3 ) must not exceed 820t/h.  ...  hydrocyclone overflow density (% solids) • y 2 : the fraction of particles smaller than 325 mesh (47Am) in the product (%) • y 3 : the tonnage through the ball mill (t/h) • y 4 : the pump sump  ... 
doi:10.1504/ijaac.2012.048645 fatcat:btp3ue2ggjdc7dis5cm7y6sp3i

Rogue seasonality detection in supply chains

Vinaya Shukla, Mohamed M. Naim, Nina F. Thornhill
2012 International Journal of Production Economics  
All rights reserved INFORMATION TO ALL U SE R S The quality of this reproduction is d ep endent upon the quality of the copy submitted.  ...  In the unlikely event that the author did not sen d a com plete manuscript and there are m issing p a g es, th e se will be noted.  ...  For example, in the case of production-inventory control, the rate of issue of production orders is a decision function 4. Information channels, which connect the levels to the decision functions.  ... 
doi:10.1016/j.ijpe.2012.03.026 fatcat:rtvbshcmizcv7mvkipk3uqoqei

Digital Control Techniques Based on Voltage Source Inverters in Renewable Energy Applications: A Review

Sohaib Tahir, Jie Wang, Mazhar Baloch, Ghulam Kaloi
2018 Electronics  
For this reason, various control strategies are anticipated for stabilizing the system to control the voltage and frequency in case of unbalanced load and nonlinear loads.  ...  In [30], a discrete-time sliding mode current controller is proposed, it is optimally operating to control the system at a sudden load change, an unbalanced load and a nonlinear load, however, the system  ...  H-Infinity Controllers The expression Hcontrol originates from the term mathematical space on which the optimization takes place: H∞ is considered as a space of matrix-valued functions that are investigative  ... 
doi:10.3390/electronics7020018 fatcat:ixmj4fw64faqfclz5jb34b4rpa

A Survey of SVC Device: Its Principle of Operation, Advantages, and Limitations

Owolabi I. Moses
2021 Current Journal of Applied Science and Technology  
However, the SVC device has no revolutionary parts, for the implementation of surge impedance compensation, and it was identified that the device is not suitable to be employed for the regulation of voltage  ...  The device was designed for power supply line with less load and simple network.  ...  Industrial SVCs are installed for example in steel mills, mines, oil & gas facilities and railway electrification systems.  ... 
doi:10.9734/cjast/2021/v40i4331615 fatcat:fubaenhaobfolggs2nbwlfzare

Toward virtual biopsy through an all fiber optic ultrasonic miniaturized transducer: a proposal

A. Acquafresca, E. Biagi, L. Masotti, D. Menichelli
2003 IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control  
function ........Optimal scheduling ........Optimization methods ............Circuit optimization ............Design optimization ............Gradient methods ............H infinity control ..........  ...  Created by The Institute of Electrical and Electronics Engineers (IEEE) for the benefit of humanity.  ... 
doi:10.1109/tuffc.2003.1244749 fatcat:l3jre4etsvcqzfyz2jqggji3gy

Analysis on warpage of support structure of computer hard disk for optimum processing by precision injection molding [chapter]

2013 Information Technology and Computer Application Engineering  
the radiosensitivity of AT cells with HPRT gene mutation  ...  Research on construction of digital garment automatic pattern system [1] Research on the anti-grade trip system in coal mine high-voltage grid based on WAMS This page intentionally left blank Study on  ...  ZHANG Zengmin & XIE Jia. 2009, The application of fuzzy control strategy in cement mill load control system, Journal of ShandongAgricultural University: Natural Science Edition 4(4): 572-576.  ... 
doi:10.1201/b15936-192 fatcat:vsysimbv2jczvkir5koktl7qlm

Integration of Adaptive Neuro Fuzzy Inference Systems and principal component analysis for the control of tertiary scale formation on tinplate at a hot mill

M. Evans, J. Kennedy
2014 Expert systems with applications  
to control the hot mill process and in particular to control the formation of scale at the hot mill.  ...  The finishing mill also controls the shape and temperature of the strip that in turn controls the metallurgical properties achieved by the strip.  ... 
doi:10.1016/j.eswa.2014.05.020 fatcat:c64zg7a77rdhpej6iomu7nfwja

Risk Evaluation in Project Planning [chapter]

Bojan Ačko, Zvonko Kremljak, Borut Buchmeister
2017 Advances in Production and Industrial Engineering  
to explain restrictions for cutting parameters as boundaries, represented with linear or nonlinear mathematical functions, and (3) the criteria for optimization, as a result of the economical or technological  ...  of the functionality of the final product.  ... 
doi:10.18690/978-961-286-028-8.1 fatcat:jsodbqszybaezh2cokhe4ysbay

Evolutionary algorithms in control systems engineering: a survey

P.J Fleming, R.C Purshouse
2002 Control Engineering Practice  
Hybrid neural and fuzzy control schemes are also described. The important role of EAs in multiobjective optimisation is highlighted.  ...  Evolutionary algorithms (EAs) permit flexible representation of decision variables and performance evaluation and are robust to difficult search environments, leading to their widespread uptake in the  ...  H-infinity controller.  ... 
doi:10.1016/s0967-0661(02)00081-3 fatcat:k6ij4y55bvbntfu5rpqpaizyni

2019-2020 Index IEEE Transactions on Industrial Electronics Vol. 67

2020 IEEE transactions on industrial electronics (1982. Print)  
for Gesture Recognition on the Back of the Hand; TIE Jan. 2020 647-657 Jiang, S., see Lyu, X., 1626-1637 Jiang, S., see Wang, K., TIE May 2020 3350-3360 Jiang, W., Wang, P., Ma, M., Wang, J., Li, J.,  ...  Lighting Control for a Proof-of-Concept Greenhouse System; TIE April 2020 3033-3042 Jiang, J., see Ma, J., TIE July 2020 5687-5695 Jiang, J., see Wang, J., TIE Aug. 2020 6864-6873 Jiang, J., see Wang  ...  H-Infinity Load Frequency Control of Networked Power Systems via an Event-Triggered Scheme.  ... 
doi:10.1109/tie.2020.3045338 fatcat:gljm7ngg3fakvmnfswcbb5vwiu

Competition Among Spatially Differentiated Firms: An Estimator with an Application to Cement

Nathan H. Miller, Matthew Osborne
2011 Social Science Research Network  
We develop an estimator for models of competition among spatially differentiated firms.  ...  We estimate transportation costs to be $0.30 per tonne-mile and show that, given the topology of the U.S.  ...  It is still possible for the partial derivatives to be bounded by a function of X which also approaches infinity as X approaches X 0 . Making that function bounded solves this problem.  ... 
doi:10.2139/ssrn.1853545 fatcat:nyq2xo5os5cmhfcgswyq377kya
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