Fault Tolerant Control of CSTR with ANFIS Based Dedicated Observer and State Feedback Control using Linear Quadratic Regulator under Abrupt Sensor Failure Conditions

Abstract

In this paper, Fault Tolerant Control (FTC) is attempted using an Adaptive Neuro Fuzzy Inference System (ANFIS) based dedicated observer and a Linear Quadratic Regulator (LQR) based state feedback control under abrupt sensor failure, is proposed. A Continuous Stirred Tank Reactor (CSTR) is a highly nonlinear process, exhibiting stable and unstable steady state at different regions. Fault Detection and Isolation (FDI) of such a complicated CSTR process is a mind boggling problem. In this paper, an ANFIS based dedicated observer scheme is dealt along with a statistical method of detection of the fault. Also, LQR based state feedback control is used for the closed loop servo and regulatory control. The result shows the feasibility of using the proposed method for the fault tolerant control of CSTR under abrupt sensor failure conditions.