MPC based State Observer and its application for system with input-output disturbances

The progression of current advancements and innovative development of power electronics has prompted the extensive utilization of Buck-Boost converters in battery management system, automatic power supplies and power amplifiers. The control objective is to track the output voltage under varying load and varying reference voltage. The nonlinear states of the converter are controlled by a systematic linearization strategy. The High Gain Observer (HGO) is formulated to estimate the output voltage and load current and these estimated values are fed forward to the Model Predictive Controller (MPC). The convergence of load current trajectories to reference current trajectories within a finite time is ensured by MPC. Output voltage tracking with the reference voltage is achieved by duty ratio generated by the inner control loop. The viability of implementation of the proposed estimator-controller combination are carried out on MATLAB Simulink.