Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/71156
Title: Non-linear function controller: A simple alternative to fuzzy logic controller for a power electronic converter
Authors: Kanakasabai, V. 
Oruganti, R. 
Srinivasan, D. 
Issue Date: 2004
Source: Kanakasabai, V.,Oruganti, R.,Srinivasan, D. (2004). Non-linear function controller: A simple alternative to fuzzy logic controller for a power electronic converter. IECON Proceedings (Industrial Electronics Conference) 3 : 2655-2660. ScholarBank@NUS Repository.
Abstract: Recently, there has been an increase in the application of fuzzy logic controllers (FLCs) for control of power electronic converters. Due to FLC's complex algorithm, their realization often calls for a compromise between cost and performance. In this paper, it is shown that the rule table of most of the two-input FLCs used with power converters can be approximated into a single non-linearity. This allows the controller to be easily realized using simple, fast, and inexpensive analog circuits. The simplified 'Non-linear Function Controller (NLFC)' developed in this manner is shown to be equivalent in performance to the original FLC through simulations. The NLFC concept is then applied to PI-FLC, a type of FLC popular in power converter control applications. This results in the PI-FLC being replaced by a simple 'Non-linear PI Controller (NPIC).' Using this simplification, the design of NPICs to obtain good dynamic performance in power converters is explained. An example design of NPIC for controlling a dc-dc boost power converter is presented. Experimental results are also presented to demonstrate the superior dynamic performance of the converter with NPIC as against that with linear-PI controller. ©2004 IEEE.
Source Title: IECON Proceedings (Industrial Electronics Conference)
URI: http://scholarbank.nus.edu.sg/handle/10635/71156
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