Abstract

Fuzzy logic controllers are useful in chemical processes where non-linearity is very high. Fuzzy based PID controller is used in improving the robustness of the system and to improve the noise rejection capability. Internal model controllers are useful in chemical processes where accurate model is not available. Internal model controllers need controller transfer function which can be calculated by determining inverse of process transfer function. By using internal model control settling time can be reduced when compared to PI or PID control. Continuous stirred tank heater with a recirculating jacket has more interacting dynamic behavior than classical CSTR. The jacket temperature is controlled by manipulating the inlet temperature

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