نتایج جستجو برای: automatic process control

تعداد نتایج: 2580020  

Journal: :Journal of the Franklin Institute 1922

2009
Jinxia Huang Junfa Wang Yonghong Yu

This article aims to design a kind of gripping-belt speed automatic tracking system of traditional Chinese herbal harvester by AT89C52 single-chip micro computer as a core combined with fuzzy PID control algorithm. The system can adjust the gripping-belt speed in accordance with the variation of the machine’s operation, so there is a perfect matching between the machine operation speed and the ...

Journal: :international journal of industrial engineering and productional research- 0
m. ghazanfari k. noghondarian a. alaedini

although control charts are very common to monitoring process changes, they usually do not indicate the real time of the changes. identifying the real time of the process changes is known as change-point estimation problem. there are a number of change point models in the literature however most of the existing approaches are dedicated to normal processes. in this paper we propose a novel appro...

Journal: :J. Electronic Imaging 2001
David M. Scott Hugh McCann

Industry has traditionally relied upon point sensors such as thermocouples and pressure gauges to control its operations, but as manufacturing processes become increasingly complex, additional types of information are required. For example, typical process measurement needs now include contamination detection, particulate size and shape, concentration/density profile (in pipes and tanks), and t...

Journal: :Operations Research 2011
Ohad Perry Ward Whitt

In Perry and Whitt (2009) we considered two networked service systems, each having its own customers and designated service pool with many agents, where all agents are able to serve the other customers, although they may do so inefficiently. Usually the agents should serve only their own customers, but we want an automatic control that activates serving some of the other customers when an unexp...

2012
Moonyong Lee

To increase precision and reliability of automatic control systems, we have to take into account of random factors affecting the control system. Thus, operational matrix technique is used for statistical analysis of first order plus time delay system with uniform random parameter. Examples with deterministic and stochastic disturbance are considered to demonstrate the validity of the method. Co...

Journal: :Psychonomic bulletin & review 2003
Larry L Jacoby D Stephen Lindsay Sandra Hessels

The influence of word reading on Stroop color naming decreases as a function of the proportion of test items that are incongruent. This proportion-congruent effect is usually ascribed to strategies (e.g., maintaining task set) that operate at a general level to moderate the extent to which participants are influenced by word reading. However, in three experiments, effects at the level of specif...

2008
Pedro C. Diniz Diogo R. Ferreira

Many end users will expect the output of process mining to be a model they can easily understand. On the other hand, knowing which objects were accessed in each operation can be a valuable input for process discovery. From these two trends it is possible to establish an analogy between process mining and the discovery of program structure. In this paper we present an approach for extracting pro...

2011
Johan Hedblom

This thesis goes into the task of analysing a bubbling fluidized bed (BFB) bark boiler and the structure of its automatic control system. The boiler being discussed is located at Billerud Karlsborg AB, although the results are to be able to be used on any BFB bark boiler. The main objective is to try to answer the following question: Exists there any changes to be made to the current structure ...

2007
Matei Vinatoru Eugen Iancu Gabriela Canureci Camelia Maican

The paper present the possibility of automatic control of the biological wastewater treatment station with applications in Romanian Chemical Companies. In this paper are developed a mathematical model for biological aeration basins and two automatic control systems (conventional control structure using threepositional controllers or PLC and advanced control structure using state estimators) for...

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