Sliding mode control approach is recognized as one of the efficient tools to design robust controller for complex higher-order dynamic plant operating under uncertainty conditions. The main advantages of sliding mode are low sensitivity to plant parameter variations and disturbances can be completely eliminated. Due to this virtue, sliding mode control has been widely applied and research on sliding mode control theory is greatly motivated as challenges and demand grow. It is noticed that a variety of improved sliding mode control schemes have been invented which possess additional desired characteristics. In this thesis, Sliding mode control strategy is applied to non interacting and interacting two tank systems with uncertainty being present. Here these systems are dynamically modeled. SMC theory and design for first order and second order sliding mode strategy is briefly presented in this work. The second order sliding mode scheme covered in this thesis are: Twisting algorithm and Super-Twisting algorithm. Since sliding mode control provides an elegant way of designing controllers feasibly for nonlinear systems. In this thesis, first order and second order sliding mode controller is applied to non interacting and interacting two tank systems.

Keywords : Siding Mode Control (SMC), Second Order Sliding Mode Control (SOSMC), First Order Sliding Mode Control (SOSMC).