Design of Globally Linearized Controller for a Nonlinear Second Order Process with Timedelay and Real Time Implementation Using dSPACE

Whilst there may be an extensive understanding of the behavior of nonlinear processes, satisfactory methods for their control are still evolving. The prevalent approach to date has been to use the model of the process linearized about the steady-state operating point for designing a linear controller. This often proves inadequate; however, the development of nonlinear controllers has featured prominently in process control research. In this work, the design and implementation of a Globally Linearized Controller (GLC) for a two capacity interacting nonlinear process is carried out and the results are compared with those obtained using a conventional PI controller based on the transfer function model about the operating point of 50%. Further, this procedure is also validated by real time experimentation using dSPACE.