Tahereh Vaezi - MSc in control engineering Dept. Control Engineering Malek Ashtar University of Technology, Tehran, Iran
Mehrzad Nasirian - Assistant professor Dept. Control Engineering Malek Ashtar University of Technology, Tehran, Iran

This paper presents sliding mode controller for an isothermal continuous stirred tank reactor, which is used to carry out chemical reactions in an industry. Isothermal continuous stirred tank reactor is one of the types of reactor which operates at a constant temperature. Variable structure control with sliding mode can provide fine control performance and robustness. However, chattering phenomenon introduced due to discontinuous switching gain limits their applications. To achieve precise tracking performance with reduced chattering effect, fuzzy sliding mode control is introduced. This nonlinear controller can eliminate the chattering problem that emerges in the conventional sliding mode control. Simulation and experiment results indicate that proposed schemes not only improve the tracking performance but also ensure chattering reduction.

Isothermal CSTR, Sliding Mode Control, Fuzzy Sliding Mode Controller, Chattering Cancellation