5Dllero A, Garcia A J. Auto tuning and supervision using fuzzy logic [J]. Fuzzy Sets and System, 1989, 50:135 - 153.
6Hu B G, George K, Mann I, et al. New methodology for analytical and optimal design of fuzzy PID controllers [J ]. IEEE Trans on Fuzzy System, 1999, 7 (5) :521 - 539.
7Ho W K,Lim K W,Xu Wen. Optimal gain and phase margin tuning for PID controller [ J ]. Automatic, 1998,34(8) : 1009 - 1010.