Advanced control system

Thomas F. Edgar/ Ph D / Professor of Chemical Engineering, University of Texas, Austin, TX. Advanced Control Systems, Process Measurements, Section Editor)... 

Over the years the performance standards of hydraulic equipment have risen. Whereas a pressure of about 1000 psi used to be adequate for industrial hydraulic systems, nowadays systems operating with pressures of 2000-3500psi are common. Pressures above 5000psi are to be found in applications such as large presses for which suitable high-pressure pumps have been developed. Additionally, systems have to provide increased power densities, more accurate response, better reliability and increased safety. Their use in numerically controlled machine tools and other advanced control systems creates the need for enhanced filtration. Full flow filters as fine as 1-10 micron retention capabilities are now to be found in many hydraulic systems. 

Duda, R., and Hart, P., Pattern Classification and Scene Analysis. Wiley, New York, 1973. Ellingsen, W., Implementation of advanced control systems. AIChE Symp. Ser. 159, 150 (1976). 

An advanced control system has been implemented for efficient operation of the pyrolysis reactor. However, it faced problems due mainly to the difficulty of measuring the high coil and coil skin temperature reliably and consistently, because of regular drifting of the high-temperature sensors. Thus, there is a need for a data reconciliation package (DRP) to increase the level of confidence in key measured variables, to indicate the status of sensors, and to estimate the value of some unmeasured variables and parameters (Weiss et al., 1996). 

LAPLACE-DOMAIN ANALYSIS OF ADVANCED CONTROL SYSTEMS 377... 

LaPLACE-MMAIN analvsis of advanced control systems 405... 

Drew Industrial Division. PULSE Analyzer Advanced Control Systems. Promotional literature, USA. 

Nalco Chemical Company. Smart System (Advanced Control Systems). Promotional literature, Nalco Chemical Company, USA. 

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