A method for defining a sliding mode control system for a turbocharger system
is
provided. The method includes perturbing a turbocharger actuator and measuring
turbocharger boost pressure output from the perturbation. The perturbation and
measurements are repeated for a plurality of states of operation of the turbocharger.
System parameters identified for each of the plurality of states from the plurality
of perturbations and measurements. A sliding mode control law may be defined for
each of the plurality of states from the system parameters. A sliding mode control
system for controlling the boost pressure of a turbocharger is also provided. An
actuator for controlling the boost pressure is electrically controlled by a sliding
mode controller to stabilize the turbocharger system toward a setpoint on a sliding
surface. The control law is determined from a plurality of linear models from a
plurality of operating states of the turbocharger system.
