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In this paper, a multi-objective control algorithm is proposed for non-Gaussian stochastic batch process control and quality monitoring. As for batch process control, the controllable system parameters shall meet the required levels in pre-specified times so that an intermediate product satisfies the required product quality attributes. As such, a joint problem of output and so called Dwelling time...
In this paper, nonlinear feedback control of a distributed process is considered by using robust right coprime factorization approach. The distributed process model is developed. The model includes a water level process model of single tank and a water flow process model for twin-tank. Then, robust right coprime factorization based nonlinear control is proposed for the distributed process consisting...
The continuous annealing furnace is one of the main equipments in the continuous annealing production line for iron and steel enterprise, and has a direct impact on the quality of cold-rolled strip steel, production and cost. The temperature control of continuous annealing furnace is a complex industrial process which is difficult to control. It is difficult to obtain a good control result by using...
Our research aim is to develop techniques for dasiaservice process control and schedulingpsila. In this paper, we introduce a kind of high-level Petri Nets-Colored Petri Nets to service engineering, and present a case study by modeling a well popularly known service system-restaurant service system in the environment of simulation software-CPN Tools.
OPC, the data integration middleware in the industrial control field, defined an industry standard for exchanging data between field devices, control systems and other applications. XML, as a W3C standard, was open and platform independent and gave another way to describe and exchange structure data between applications. The combination of OPC and XML, provides vertical integration from floor layer...
As a distributed open system in manufacturing and process control environment, fieldbus aims to provide an international standard in this field. In order to satisfy the requirement of data transfer in industrial control, the interface between fieldbus and the program also need to pursue a standard. OPC technology is introduced to satisfy the requirement of efficient data transfer. It develops an open...
A distributed real-time production supervisory designing conception based on OPC and Web technique is presented. The OPC technique and its application in the DCS of cement enterprise are introduced, the seamless connection between the application and plant, and the Web distribution of production data are realized.
In the raw slurry blending process, red mud, alkali powder, blending ore and limestone are translated into ball mills to produce the raw slurry whose quality indices include calcium ratio, alkali ratio and water content. The operation control objective of the blending process is to control the quality indices into their targeted ranges. However, in the raw slurry blending process, quality indices...
In this paper, a new technique for multivariable process identification in the frequency domain based on a simple test is presented. Step changes in the controller set point are performed on the process and the process frequency response matrix is estimated with signal decomposition and analysis method in the frequency domain. Consequently, an accurate transform function matrix can be also identified...
In envelope process of cutter, profile and tool-path of cutter are complicated, and the grinding depth is variable which causes grinding force to change on a large scale and the error of edge envelope to increase. To improve cutter accuracy, the theoretical model of cutter edge and theoretical tool-path of CNC tool grinder were calculated. Closed-loop control system was designed to accomplish control...
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