Digital control system design

This tutorial looks at the application of MATLAB to digital control system design, using the problems in Chapter 7 as design examples. 

Harriott, P. (2002). Chemical reactor design, pp. 131-142. CRC First Edition, New York Landau, Y, D. Zito, Gianluca. (2006). Digital Control Systems Design, Identification and Implementation, pp. 267-291, First Edition of Springer, Paris Ogata. K. (2001). Modern control engineering, pp. 310-431. Prentice Hall fourth Edition, New York... 

As the book covers both steady- and unsteady-state situations, it logically includes a chapter on process dynamics and control that is an excellent introduction to a more advanced treatment of this topic, with special emphasis on the industrially more relevant digital control systems design. 

The Turbolog DSP digital control system was installed to meet these requirements. This system is based on off-the-shelf hardware that is adapted to this application, running GHH-Borsig s custom-designed... 

An inherently safer control system design will, where possible, include options for on-line reliability tests and inspections. Within digital devices, this is done using watch-dog timers to assure the signals are processed. 

Pilot-plant experiments have been carried out at real process conditions in the coke plant August Thyssen (Duisburg, Germany). The DN 100 pilot column (Fig. 9.11) was made from stainless steel and equipped with about 4 m of structured packing (Sulzer MELLAPAK 350Y), three liquid distributors, and a digital control system. Several steady-state experiments have been compared with the simulation results and supported the design optimization of the coke gas purification process [91]. 

The design of digital control systems will be the subject of Chapter 30, and Chapter 31 will treat the question of experimentally modeling a process. Finally, the on-line coordination of an experimental modeling procedure with a control algorithm will be examined in Chapter 31, in an attempt to develop on-line adaptive control systems. 

After the publication of JEAG 4609, the reliability analysis of the digital control systems were performed, in parallel with the verification test of digital control systems, which was performed by NUPEC (Nuclear Power Engineering Corporation) since 1989. The design of digital safety system for K-6/7 was started in 1991. Figure-1 shows the development process. 

Phillips C.L., Nagle. H.T., 1995. Digital control system analysis and design 3 ed. New Jersey Prentiee Hall, cop. 

The CAREM reactor is designed with a distributed digital control system. Sensor signals are digitalized and fed to micro-processors. These microprocessors are placed as close to the field as possible. Microprocessors communicate with each other through a redundant network. The man-machine interface is connected to the same network. 

This revolution in plant control has been led largely by the aviation industry, which was ahead of process plant in the adoption of digital control systems. For that reason, the design of digital plant control systems for hazardous process plant can leam a great deal from the experiences, incidents and accidents in the aviation sector as it changed to digital systems, as we shall see. 

An extremely valuable contribution to control system design has been provided by the digital and analogue system simulations developed over the past years. It is, therefore, worthwhile to outline the basic content of the current wide range simulator which is programmed on a PACE analogue computer. 

Performability is improved with the use of digital instruments and control system design and simplification of the main control room and instrument detection system. 

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