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Contra pose the character of scheduling problem in the aluminum industry, a virtual enterprise is abstracted in this paper. The VE substitute manufacturing techniques. A model of scheduling system during aluminum industry is also established based on a Multi-agent theory. As a foundation we will study the system model concerning every agent's working mechanism and the mechanism of corresponding with...
Production automation systems consist of many entities (like robots and shuttles) that interact in complex ways to provide the overall system functionality like product assembly. Multi-Agent Systems (MAS) can simulate these system entities and their interactions to better understand the system behavior according to production strategies and system configuration, which are otherwise hard to determine...
The threaded-EWMA run-to-run control is an important stable control scheme. However, the process outputs will deviate largely in the first few runs of each cycle if the disturbance follows an IMA(1,1) series with deterministic linear drift/fault and the thread has a long break length. In this paper, we analyzed the output of the threaded-EWMA run-to-run control. Based on the analysis of system performance,...
In order to improve production efficiency and product quality, field data of production, especially key data, need to be sent to the chief engineer and the manager for making the proper decision in time in modernization enterprise. In this paper, the client program of OPC for obtaining field data from industry Ethernet is designed for the remote monitoring system. Besides, the redundant AC800F controllers...
We previously showed that microparts can be fed along a saw-toothed surface using simple planar symmetric vibrations. Microparts move forward because they adhere to the saw-toothed surface asymmetrically. Using saw-toothed silicon wafers fabricated by a dicing saw applying bevel type blades, we evaluated the principle of unidirectional feeding of 2012-type capacitors (size, 2.0 times 1.2 times 0.6...
Companies that are able to develop products which can adapt to uncertainties in the turbulent markets and serve a broad range of customer requirements are able to win on the battle fields. In order to leap forward in todaypsilas tough markets, one effective approach for designing a product is to use a platform strategy. Development of flexible architectures is the key core competency required for...
Assembly systems that are able to function in the presence of uncertainties in the positions and orientations of feed parts are, by definition, more robust than those that are not able to do so. Sanderson quantified this with the concept of ldquoparts entropy,rdquo which is a statistical measure of the ensemble of all possible positions and orientations of a single part confined to move in a finite...
Determining the pose of three-dimensional objects from two-dimensional images has become an important issue in industrial automation applications. Eigendecomposition represents one computationally efficient method for dealing with this class of problems. One major drawback of using the eigendecomposition technique is the expensive off-line computation required to calculate the optimal subspace. This...
Geographic dispersion and distribution of productive activities in relatively autonomous systems are viable due to the advances in mechatronics, communication and information technologies. These productive systems are then composed of several components (sub-systems) with some degree of autonomy, and these must present a collaborative relationship to assure the overall performance of the system. Therefore,...
In the present work, an attempt has been made to form disjoint machine cells using modified ART1 (adaptive resonance theory) to handle the real valued workload matrix. The methodology first allocates the machines to various machine cells and then parts are assigned to those cells with the aid of degree of belongingness through a membership index. The proposed algorithm uses a supplementary procedure...
Distributed collaborative design and manufacture enables manufacturing organizations in maintaining competitiveness in the fiercely competitive global industry. A collaborative design system should be able to transfer information with the various other systems in order to realize a seamless product design and manufacturing environment. This paper addresses the development of an integrated fixture...
This paper presents new approach for shrinkage compensation in selective laser sintering (SLS) process to improve the accuracy of parts produced. Shrinkage is compensated along single direction dexel space generated from the part geometry. The scaling factor used in this compensation is calculated from shrinkage model (It is the empirical relation between percentage shrinkage and the dexel length)...
Web-technologies which came up in many fields of automation seem to be a solution which improves device integration in many ways. On the one hand the used Ethernet improves the installation techniques with reliable and approved network cables and routing devices. On the other hand the used internet protocols provide several services for the application software development. The following article is...
Modern drilling technology in the oil industry relies on the effective control and understanding of nonlinear phenomena. In this paper, the dynamical model of the drilling well components, i.e., such as drilling rig, drill pipe, drill collars, and drilling bit will be presented. These components can be used to estimate borehole parameters of a drilling station to predict or detect unwanted phenomena...
In this paper Fisher's discriminant analysis (FDA) is used for detecting and diagnosing faults in a real plant. FDA provides an optimal lower dimensional representation in terms of discriminating between classes of data, where, in this context of fault diagnosis, each class corresponds to data collected during a specific, known fault. A discriminant function is applied to detect and diagnose faults...
The synthesis of plant-wide control structures is recognized as one of the most important production- management design problems in the process industries. This article proposes a decision support system, utilizing key performance indicators (pPIs) as a possible solution to simplify this problem. pPIs represent the translation of operating objectives, such as the minimization of production costs,...
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