Abstract
It has been widely verified that a fuzzy logic controller can achieve a better performance for industrial systems than conventional controllers. In addition, fuzzy logic controllers have a major interest of researchers in the area of industrial process control. For these reasons in this paper, a PID type fuzzy logic controller (FPID) is presented for programmable logic controllers (PLC), and the design steps are explained in detail (such as tuning FPID's parameters, using symmetric or non-symmetric membership functions) to express the presented FPID functional for industrial systems. The aim of this study is to put forward efficiency of PID type fuzzy logic controllers for PLCs on industrial long dead-time systems. Moreover in this paper, a PLC algorithm is constructed and the complete algorithm is tested in a first order long dead-time system, second order long dead-time systems, and results of this tests are offered and explained.
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