A Fuzzy PID Controller for the Discontinuous Heating System

• Main Authors: JHANG-CHUN MU, 張春木
• Other Authors: JHANG-HONG YI
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/wfq658

碩士 === 國立虎尾科技大學 === 航空與電子科技研究所 === 97 === The one dimensional PID (1-D PID) controller seems the most popular one for the industrial control with its flexible in parameters adjustable and no modeling needed for the system. But the 1-D PID is not suitable to a multiple input and multiple output (MIMO) control system. But, the MIMO system is very wildly used in industrial applications. In order to apply the 1-D PID controller to a MIMO system, a particular decoupling scheme must be combined with the traditional 1-D PID controller to cancel the dependency between the dimensions of a MIMO control system. However, to obtain this decoupling scheme must model the control system firstly. This procedure is against the flexible property of the PID controller. In this thesis we propose a novel decoupling scheme of a MIMO system which based on fuzzy theory. The parameters of this new decoupling scheme are adjustable, so the engineer can setup suitable parameters of it to adapt a particular control system but no modeling of the system needed. Therefore the flexible advantage of the PID controller is reversed. We implement this fuzzy decoupling control system for a discrete heating oven. In our experiments, this new control system can solve this MIMO heating problem, so we believe it is useful for other realistic control system design.