Luenberger Observer based Sensor and Actuator Fault Detection for Chemical Reactor

AbstractIn this paper, we propose the application of a principal observer based fault diagnosis approaches for chemical process. The Continuous Stirred Tank Reactor (CSTR) model with parametric uncertainties is linearized around a chosen steady state. A Lunberger observer is employed to generate conversion estimates for the CSTR using only temperature measurements. Results of numerical simulations of a no isothermal CSTR with coolant jacket dynamics are presented. An average robustness with respect to interpolation errors, disturbances and model parametric uncertainties is achieved by using the obtained Lunberger observer only for the sensor faults. But the detection of actuator fault is not achieved by this approach.