design of feedback control systems by stefani 4th edition pdf

... in the theory concerning the design of control systems with multiple saturations. A systematic methodology is introduced to design control systems with multiple saturations ... Saturations can also affect the performance of the control system by introducing reset windups and by changing the direction of the control signal. Large overshoots and oscillatory ... Robustness Theory of Multivariable Systems, LIDS-R-954, M.I.T., Cambridge, MA, April 25-27, 1979. [4] A. Weinreb and A.E. Bryson," Optimal Control of Systems with Hard Control Bounds"...

Ngày tải lên: 18/02/2014, 10:20

... Linearization of LPNI Systems 20 3 Analysis of Reference Tracking in LPNI Systems 66 4 Analysis of Disturbance Rejection in LPNI Systems 114 5 Design of Reference Tracking Controllers for LPNI Systems ... arguments lead to a class of systems that we refer to as Linear Plant/Nonlinear Instrumentation (LPNI). The controllers in feedback systems are often designed to be linear. The main design techniques ... Linearization of LPNI Systems 20 2.1 Stochastic Linearization of Open Loop Systems 20 2.1.1 Stochastic Linearization of Isolated Nonlinearities 20 2.1.2 Stochastic Linearization of Direct Paths of LPNI Systems...

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Ngày tải lên: 01/01/2014, 17:47

... words, so we began by analysing the total of 401 instances of 104 unknown words. Our interest here lay in the influence of the task on language use so we focus on 3 classes of unknown words ... discussion of the vari- ous approaches that have been used in the evaluation of Natural Language systems. We conclude that pre- vious approaches have neglected to evaluate systems in the context of ... 1.1 Approaches to the evaluation of NL systems It is clear that a number of different criteria might be employed in the evaluation of Natural Language (NL) systems. It is also clear that there...

Ngày tải lên: 01/04/2014, 00:20

... Lines Acknowledgments to the Third Edition A number of people helped to make possible this revised third edition of Surface Production Operations, Volume 1 Design of Oil and Water Han- dling Facilities. ... together. This edition contains significant amounts of new material which was developed and gathered primarily by Maurice as a result of his years of teaching and consulting using the original editions ... rate of liquid flowing into the vessel is matched by the rate out of the vessel. Temperature Control The way in which the process temperature is controlled varies. In a heater a temperature controller...

Ngày tải lên: 02/04/2014, 16:08

... 10.1155/ASP/2006/64645 Optimal Design of Noisy Transmultiplexer Systems Huan Zhou 1 and Lihua Xie 2 1 Signal Processing Group, Institute of Physics, University of Oldenburg, 26111 Oldenburg, Germany 2 School of Elect ... the channel noise of variance σ 2 r = 0.09 and σ 2 r = 0.9 (in this case, corresponding to the SNR c of 20 dB and 10 dB, resp.), we design the receivers by the optimal H 2 design (Theorem 1 )withanH ∞ crosstalk ... crosstalk problem by an H ∞ optimization approach. In general, there are two reasons for the study of crosstalk attenuation by H ∞ approach. First, as stated before, one problem often encountered...

Ngày tải lên: 22/06/2014, 23:20

... 1999 edition by K. S. Chiou of Paragon Engineering Services, Inc. Preface As teachers of production facility design courses in petroleum engi- neering programs at University of ... 320, Fugitive Emissions Control 321 Example Problem, 321 CHAPTER 12 Mechanical Design of Pressure Vessels 327 Design Considerations, 328 Design Temperature 328, Design Pressure 328, Maximum ... Individual Risk Rate, 423 ix SECOND EDITION Surface Production Operations VOLUME 2 Design of Gas-Handling Systems and Facilities Copyright â 1989, 1999 by Elsevier Science (USA). All ...

Ngày tải lên: 06/08/2014, 02:20

... the wall of the tube by a conduction process which is controlled by the tube- wall's thermal conductivity and tube-wall thickness. The transfer of heat from the outside wall of ... bulk of the fluid outside is again a convective process. It is controlled by the outide film coefficient. All of these resistances are added in series, similar to a series of ... Equation 2-3. 12 Design of GAS-HANDLING Systems and facilities Figure 2-2. Change in AT over distance, counter-current flow of fluids. Since the temperature of both fluids changes ...

Ngày tải lên: 06/08/2014, 02:20

... area of outside surface of the fire tube. Common heat flux rates are given in Table 2-11. 38 Design of GAS-HANDLING Systems and Facilities Figure 2-14. Specific heals of ... from the following equation by assuming a water specific heat of 1.0 Btu/lb-°F. where Q w = water flow rate, bpd 44 Design of GAS-HANDLING Systems and Facilities The heat ... end of the heat exchanger, the sec- ond letter designates the shell type, or the middle of the heat exchanger, and the third letter designates the back, or the rear, of the ...

Ngày tải lên: 06/08/2014, 02:20

... Data Book, 9th Edition. 84 Design of GAS-HANDLING Systems and Facilities Figure 3-20. Vertical-tube-fired heaters can be identified by the vertical arrangement of the radiant-section ... page) 76 Design of GAS-HANDLING Systems and Facilities Figure 3-15. Side elevations of air coolers. (From Gas Processors Suppliers Association, Engineering Data Book, 9th Edition. ) transfer ... lowest number of tubes because of the space required for the tightest radius bend in the U-tube bundle. Once the number of tubes is determined, the flow velocity of fluid inside ...

Ngày tải lên: 06/08/2014, 02:20

... Btu/lb°F (Figure 2-14) 100 Design of GAS-HANDLINCr Systems and facilities by Figure 4-6. The graph shows the water content in pounds of water per MMscf of saturated gas at any ... or expansion of gas from a high pressure to a lower pressure, is generally required for control of gas flow rates. Choking is achieved by the use of a choke or a control valve. ... temperature downstream of the choke, which assures that the enthalpy of the mixture of gas and liquid upstream of the choke equals the enthalpy of the new mixture of more gas and ...

Ngày tải lên: 06/08/2014, 02:20

... specification. This is accomplished by driving the maximum number of molecules of methane and ethane out of the liquid and keep- ing as much of the heavier ends as possible ... next higher unit of 10 psig. No corrosion allowance is assumed; same formula as ANSI B31.3 126 Design of GAS-HANDLING Systems and Facilities lb water/MMscf of wet gas at reservoir ... area of the fire tube is normally calculated based on a heat flux rate of 10,000 Btu/hr-ft 2 . The fire-tube length can be determined from: 124 Design of GAS-HANDLING Systems ...

Ngày tải lên: 06/08/2014, 02:20

... device. The height of the tower is a function of the number of theoretical stages and of the efficiency of the actual stages. The diameter of the tower is a function of the hydraulic ... liquid divided by moles of n-C 4 in feed RV n = relative volatility of component n from Table 6-1 To determine the compositon of the bottom liquid, assume a split of n- C 4 ... constants from Chapter 3, Volume I, and computing: 142 Design of GAS-HANDLING Systems and Facilities is controlled by (1) perforations in the tray deck (sieve trays), (2) bubble caps ...

Ngày tải lên: 06/08/2014, 02:20

... maximum rate of deposition of 15 grains of H 2 S/min/ft 2 of bed cross-sectional area is also recommended to allow for the dissipation of 176 Design of GAS-HANDLING Systems and ... of the acid gas components. where PPj = partial pressure of component i, psia P t = systems pressure, psia Xj = mole fraction of component i 164 Design of GAS-HANDLING Systems ... MEA. Loadings for DEA systems range to 0.65 mole of acid gas per mole of DEA compared to a maximum of 0.4 mole of acid gas per mole of MEA. The result of this is that the ...

Ngày tải lên: 06/08/2014, 02:20

... the design of liquid glycol and solid bed dehy- dration systems that are the most common methods of dehydration used *Reviewed for the 1999 edition by Lindsey S. Stinson of ... each tray. A tray efficiency of 25% is commonly used for design. That is, if one theoretical 188 Design of GAS-HANDLING Systems and Facilities For design, reboiler temperatures ... adsorbs water at the reboiler conditions of atmospheric pres- 190 Design of GAS-HANDLING Systems and Facilities When MEA is used in the presence of COS and CS 2 , they react to ...

Ngày tải lên: 06/08/2014, 02:20

... load. Too much 232 Design of GAS-HANDLING Systems and Facilities mit some of the wet gas to bypass the desiccant bed. Only a small amount of wet, bypassed gas is needed ... primarily by economics. Some- times the process conditions control the desiccant choice. Many times the 234 Design of GAS-HANDLING Systems and Facilities Figure 8-22. Maximum design ... the gas. The switching of the beds is controlled by a time controller that per- forms switching operations at specified times in the cycle. The length of the different phases ...

Ngày tải lên: 06/08/2014, 02:20

Ngày tải lên: 06/08/2014, 02:20