Method and system for sliding mode control of a turbocharger
First Claim
1. A sliding mode control system for controlling the boost pressure of a turbocharger system comprising:
- an actuator for controlling the boost pressure, the actuator position being configured to be electrically controlled;
a sliding mode controller, the actuator being responsive to the sliding mode controller, the sliding mode controller satisfying a control law that stabilizes the turbocharger system toward a sliding surface, s, defined by a line on a phase plane diagram of boost pressure state, the control law being determined from a plurality of linear models, each model defined by one of a plurality of operating states of the turbocharger system.
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Abstract
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.
28 Citations
20 Claims
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1. A sliding mode control system for controlling the boost pressure of a turbocharger system comprising:
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an actuator for controlling the boost pressure, the actuator position being configured to be electrically controlled;
a sliding mode controller, the actuator being responsive to the sliding mode controller, the sliding mode controller satisfying a control law that stabilizes the turbocharger system toward a sliding surface, s, defined by a line on a phase plane diagram of boost pressure state, the control law being determined from a plurality of linear models, each model defined by one of a plurality of operating states of the turbocharger system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of defining a sliding mode control algorithm for a turbocharger system having an actuator for controlling boost pressure, comprising:
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perturbing the actuator from a steady state;
measuring the boost pressure output from the perturbation;
repeating the perturbing and measuring steps for a plurality of states of operation;
identifying system parameters for each of the plurality of states from the plurality of perturbations and measurements, wherein the system parameters are coefficients of a linear turbocharger system model;
defining a sliding mode control law for each of the plurality of states to stabilize the turbocharger system toward a sliding surface, s, defined by a line on a phase plane diagram of the boost pressure. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification