Design of control systems

The nature of batch operations (unsteady-state), frequently involving manual intervention, creates significant issues pertaining to the design of control systems, design of operating procedures, and the interaction between the... 

The second point of view is that the engineering design of control systems for stationary and mobile sources requires a command of the principles of... 

The principal advantage of equation based, dynamic, simulators is their ability to model the unsteady-state conditions that occur at start-up and during fault conditions. Dynamic simulators are being increasingly used for safety studies and in the design of control systems. 

The term engineered safety covers the provision in the design of control systems, alarms, trips, pressure-relief devices, automatic shut-down systems, duplication of key equipment services and fire-fighting equipment, sprinkler systems and blast walls, to contain any fire or explosion. 

Dorf, R. C., Time-Domain Analysis and Design of Control Systems, Addison-Wesley, Reading, Massachusetts, 1964. 

Auslander DM, Spear RC, Young GE. 1982. A simulation-based approach to the design of control systems with uncertain parameters. Trans Am Soc Mech Eng 104 20-26. 

If xj/ < 0 the output is said to lag the input, and if xj/ > 0 it is said to lead the input. The relationship between input and output for a sinusoidal forcing function as t -> oo constitutes an important tool in the analysis and design of control systems termed frequency response analysis. Of particular importance are the amplitude ratio (AR) and the phase shift xfr. The AR represents the relationship between the output and the input amplitudes... 

The trade-offs among process design, optimization and control must be considered. The hierarchical or distributed nature of the plant or process may need to be exploited in an advanced control scheme. The operation of energy-integrated plants requires design of control systems which are decentralized (such as with microprocessors) but which respond to overall plant objectives via a communication link to a larger computer. 

The integration activities have been mainly related to heat and mass exchangers. However, there are many more popular applications related to integration of flowsheet creation with simultaneous consideration of safety aspects. The design of control system is also beginning to be integrated with process synthesis and... 

Linearization is the process by which we approximate nonlinear systems with linear ones. It is widely used in the study of process dynamics and design of control systems for the following reasons ... 

Design of Control Systems for Multivariable Processes Plant Control... 

Finally, in Chapter 25 we will present an introduction to the design of control systems for complete plants, which constitute the most complex MIMO systems to be encountered by a chemical engineer. 

From the discussion in Chapter 23, two characteristics should be clear concerning the design of control systems for processes with multiple inputs and multiple outputs ... 

There is no unified and widely acceptable theory for the design of control systems for complete chemical plants. Therefore, instead of presenting an abstract exposition of the various factors that affect control system design, we will use a particular plant as a reference for our discussion. Although a case study has a rather limited scope, it describes clearly the solution methodology and demands concrete answers to specific questions rather than generalities. 

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