A comparative study of feedforward and feedback control systems for processes with dead time

Various reasons for improving the response of a feedback type control system are given. The best response of a conventional feedback type of control system is described and plotted. For a given dead time process, three conventional modes of controller action are adjusted and the output response determined for each system. These output response curves are shown in such a manner, in the time domain, that differences in controllability are easily seen. A process example of a typical industrial blending system is discussed and analyzed, using conventional feedback techniques and feedforward elements. The thesis closes with an evaluation of the results obtained for each of the process systems that were analyzed.