The Perturbation Estimation in Two Gas Processes

The perturbations are the unwanted and unknown inlets in nonlinear processes, which can affect the outlets. In this chapter, an estimator is recommended for the variables and perturbation estimation in nonlinear processes. The saturation function is utilized in our estimator instead of the signum function to decrease the chattering, and we warrant the estimator convergence using the Lyapunov strategy. The conditions required by our estimator gains are found to reach the variables’ error convergence, and these gains are utilized for the perturbation estimation. An algorithm is recommended to choose the gains for achieving a satisfactory performance in our estimator. The recommended estimator is applied for the variable and perturbation estimation in the gas turbine and gasification processes.