Secondly , during the braising offline temperature control loop of the oil production - lixiviating procedure , the controlled object , which is hard to build the extract model , has the characteristics of large inertial , big time - delay . the control strategy of the combination of fuzzy logic arithmetic and normal pid arithmetic is introduced in this paper , the basic principle and actualization method of fuzzy - pid are analyzed . the design model is simulated in matlab and the result proves good control performance
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