The robustness of online particle size analysis in wet processes is improved by applying data based modeling methods to the control of the sample preparation and measurement sequence of the particle size analyzer. The aim is to find a more accurate and reliable method of determining the end of the particle size integration period using multivariate statistical process control (MSPC).The studied approach is tested on analyzers installed at two mineral processing plant sites and validated using two validation tests. Research shows that the proposed method works with two very different slurry types. The main advantage of the adapted approach is that there are no adjustable parameters that have to be set by the user.
Abslrocl-The business oppanunitlan in aner-sales services such as condition based maintenance were noticed by msny vendors o f process and autm"ion equipment before adquale standards and ~rchitect~res became available. Consequently, at a clleol'~ premises there are many units of process equipment. software modules and Internet connections that have b e n installed by different vendors. and this uneoordinaled work has created serious interoperability. msintainability and security problems. This paper proposes an open dsndsrds-based service architecture far industrial tclematics that suppon~ intrroperabllity. software component llfecyele management and secure execution snd rommunbation of components in B multi-vendarenuiranmmt.Inder Tmnr-Maintenance, After-sles sew lee^, Reference madcl. Component amhite~t~ie. Lifecycle management
INTRODUCIIONMost vendors of process and automation equipment have noticed a drop in the demand for basic products, so thc current trend is to develop new business models based on after-sales services such as remote monitoring, diagnostics. maintenance and contml [I]. The nature and scope of the service can vary greatly among different clients, so the vendor will have to tailor its products according to a client's needs and constraints. The services are designed for products lhat have been installed onto a client's premises, so it is necessary to establish a connection to the site from a remote support centre over an unreliable W A N (Wide Area Network).The smooth running of a client's process or production line depends very much on the cooperation ofsoftware and hardware from several vendors Each of these vendors has embedded some intellectual propeny (U') into its products, and the remaining challenge is to ensure their effonless interoperability and dynamic reconfigurability This work is already being carried out by the OOONEIDA: our goal is to extend the scenario to explicitly support the globally distributed service business and to evalualc promising standards and technologies [SI.This paper discusses the usefulness o f a service platform that suppons the execution and lifecycle management of component-based applications and L e reliable coordination o f the various business roles that are involved. Our current research is mainly concerned with remote services performed by expens over the WAN and on how these experts can access the intellecfllal propmrly at the devices. machines and systems at the remote site. The integration o f the service applications with the systems at the factory (e.g. IEC 61499 control applications) i s explored using communication middleware. Finally. the possibility o f using the service platform to manage all ofthe s o h a r e components in the open knowledge economy is presented.Although the Solutions presented in this paper are applicable to a wide range of after-sales services, our case is focused on condition-based maintenance and the OSA-CBM (Open Syslem Architecture -Condition Based Maintenance) reference architechxe. OSA-CBM defines a layered sohare c...
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