Optimizing Control Systems

Since the control calculations are based on optimizing control system performance, MFC can be readily integrated with on-line optimization strategies to optimize plant performance. 

An optimal control system seeks to maximize the return from a system for the minimum cost. In general terms, the optimal control problem is to find a control u which causes the system... 

The results from the model were compared semi-quantitatively with experimental measurements to validate the model. Because of both the extremely long time constants in the system and the variations in the ambient conditions in the laboratory where the extruder was placed, it was not possible to rigorously test the model against experimental data. To conserve demands of time and materials for experiments on the extruder, numerical experiments were used to provide data for developing an optimal control system. The goal of the numerical experiments was to develop a reduced-order model suitable for optimizing the control system. 

The books by T. Kailath [Unear Systems, 1980, Prentice-Hall) and H. Kwakernaak and R. Sivan Linear Optimal Control Systems, 1972, Wiley) can be consulted for detailed information. A recent paper by MacGregor, et al. ( State Estimation For Polymerization Reactors, 1986IFAC Symposium, Bournemouth, U.K.) discusses some of the problems of applying state estimators to chemical engineering systems. 

In the case of "flash steam" power plants, the steam is either generated directly by the production wells or the wells produce hot water from which steam can be separated to drive conventional steam turbine generators. The size of these plants ranges from 100 kW to 150 mW. Figure 2.104 illustrates the optimizing control system for such a geothermal facility. 

Sannuti, P. and Cruz, J. B., "A Note on Trajectory Sensitivity of Optimal Control Systems," IEEE Trans. Auto. Cont., 1968, AC-13, 111. 

What is the purpose of an optimizing control system, and how is it implemented in practice Why is it needed ... 

Linear Optimal Control Systems, by H. Kwakernaak and R. Sivan, John Wiley Sons, Inc. (Interscience Division), New York (1972). 

Would you recommend an optimizing control system for the hydrodealkylation plant Why ... 

Bryson, A.E., and Flo, Y.-C. (1975). Linear Optimal Control Systems, Hemisphere Publishing Corporation, New York. 

Equip artition of entropy production, EoEP, but also equipartition offorces, EoF, are good approximations to the state of minimum entropy production in parts of an optimally controlled system that has sufficient freedom. 

The heart of a peak-seeking controller is a one-way storage device it accepts only increasing inputs. This function can be performed by a capacitor charged through a diode, as shown in Fig. 6.25. In an optimizing control system, the difference between the input, and output of the... 

Equation (10.24) shows that, because of the recycle loop, the process is non-self-regulating. Consequently an integral controller cannot be used to regulate composition. This rules out any kind of feedback-optimizing control system. But because of the lack of self-regulation, end-point... 

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