AN OPTIMAL FEEDBACK LINEARIZATION APPROACH FOR THE SOFT LANDING OF ELECTROMECHANICAL VALVE ACTUATOR IN CAMLESS INTERNAL COMBUSTION ENGINES

Recently, the fuel efficiency, maximum torque and power, and pollutant emissions of internal combustion engines have improved more remarkably compared to conventional crankshaft systems as a result of replacing the crankshaft with the camless actuation system. Some of the main conflicting objectives in camless engines include soft landing, tracking of the desired trajectory and valve opening and seating in very fast time. Due to the nonlinear model of the system, the present study aimed to propose feedback linearization control to manage the challenges of the system. In order to optimize the system response, the concept of feedback linearization control is incorporated into the linear quadratic tracker, resulting in the proposed structure known as FLQT. The simulation results in the normal case, as well as in the presence of external disturbance, indicated that the optimal feedback linearization controller had proper performance in the realization of the desired system objectives.