Dept. of Electr. Eng., National Taiwan Univ.YUNG-YAW CHENYen, Chen-ChengChen-ChengYen2007-04-192018-07-062007-04-192018-07-061992-1121593442http://ntur.lib.ntu.edu.tw//handle/246246/2007041910032290https://www.scopus.com/inward/record.uri?eid=2-s2.0-85033054682&doi=10.1109%2fTENCON.1992.271927&partnerID=40&md5=71a26ebdc9a1ade2081294f6468ae8feA fuzzy controller considering the error and the charge rate of error of the output variable can be regarded as a nonlinear PD controller. The authors show that the PD-type fuzzy controller is deficient in structure and can be improved by incorporating the summation of the output errors. The proposed PID-type fuzzy controller is capable of achieving zero steady-state error with very little overshoot for difference reference points, which is a very difficult task for a fixed PD-type fuzzy controller. Several examples are shown to illustrate the weakness of the PD-type fuzzy controllers and the improvements obtained by the addition of summation-of-errors in the premise of the rule base. © 1992 IEEE.application/pdf257261 bytesapplication/pdfen-USErrors; Charge rate; Fuzzy controllers; Output errors; Output variables; PD controllers; PID type fuzzy controller; Reference points; Zero steady state error; Controllersconference paper10.1109/TENCON.1992.2719272-s2.0-85033054682http://ntur.lib.ntu.edu.tw/bitstream/246246/2007041910032290/1/00271927.pdf