Control: system designer

Higher-order systems can be approximated by a first or second-order plus dead-time system for control system design. 

Pairing of Controlled and Manipulated Variables A key decision in multiloop-control-system design is the pairing of manipu-... 

General References Fisher, Batch Control Systems Design, Application,... 

Control analysi.s/design. Analysis of column balances and profiles to aid in control system design and operation. 

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... 

Eisher, T. G. 1990. Batch Control Systems—Design, Application, and Implementation. Instrument Society of America. 

In control engineering, the way in which the system outputs respond in changes to the system inputs (i.e. the system response) is very important. The control system design engineer will attempt to evaluate the system response by determining a mathematical model for the system. Knowledge of the system inputs, together with the mathematical model, will allow the system outputs to be calculated. 

The selection of the PID controller parameters K, T[ and can be obtained using the classical control system design techniques described in Chapters 5 and 6. In the 1940s, when such tools were just being developed, Ziegler and Nichols (1942) devised two empirical methods for obtaining the controller parameters. These methods are still in use. 

The root locus method provides a very powerful tool for control system design. The objective is to shape the loci so that closed-loop poles can be placed in the. v-plane at positions that produce a transient response that meets a given performance specification. It should be noted that a root locus diagram does not provide information relating to steady-state response, so that steady-state errors may go undetected, unless checked by other means, i.e. time response. 

Control system design in the frequeney domain ean be undertaken using a purely tlieoretieal approaeli, or alternatively, using measurements taken from the eompon-ents in the eontrol loop. The teehnique allows transfer funetions of both the system elements and the eomplete system to be estimated, and a suitable eontroller/eompen-sator to be designed. 

State-space methods for control system design... 

The classical control system design techniques discussed in Chapters 5-7 are generally only applicable to... 

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