WSEAS Transactions on Systems and Control
Print ISSN: 1991-8763, E-ISSN: 2224-2856
Volume 11, 2016
Control of FOPDT Process Using Sliding Mode Controller with Modified PI-D Sliding Surface
Authors: ,
Abstract: This paper is about the design of a Sliding Mode Controller (SMC), with modified PI-D sliding surface, for the control of First Order Plus Dead Time (FOPDT) process. In the modified PI-D sliding surface, error is connected to the proportional and integral elements of the controller, and the derivative of the system output is connected to derivative element of the controller. The usage of PI-D sliding surface eliminates the discontinuous switching in SMC. In this work, the integro-differential equation used for representing the sliding surface of SMC is replaced with PI-D sliding surface. The controller designed is used to obtain the desired closed loop response of the FOPDT system considered, in simulation. The closed loop performance of SMC with integro-differential equation and SMC with PI-D sliding surface are compared.
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Keywords: Sliding mode controller, PID controller, sliding surface, PI-D sliding surface, integro-differential equation, FOPDT process
Pages: 27-31
WSEAS Transactions on Systems and Control, ISSN / E-ISSN: 1991-8763 / 2224-2856, Volume 11, 2016, Art. #4