Model predictive control systems and methods for increasing computational efficiency
First Claim
1. An engine control system for a vehicle, comprising:
- a torque requesting module that generates a first torque request for a spark ignition engine based on driver input;
a torque conversion module that converts the first torque request into a second torque request;
a model predictive control (MPC) module that determines a current set of target values based on the second torque request, a model of the engine, a tableau matrix, and a basic solution matrix, wherein the MPC module;
initializes the basic solution matrix to a predetermined matrix that is dual feasible;
selectively iteratively updates the basic solution matrix and columns of the tableau matrix;
determines changes for the target values, respectively, based on entries of the basic solution matrix resulting from the selective iterative updating; and
determines the current set of target values by summing the changes with a last set of target values, respectively; and
at least one of;
a throttle actuator module that controls opening of a throttle valve based on a first one of the current set of target values;
a boost actuator module that controls opening of a wastegate of a turbocharger based on a second one of the current set of target values;
an exhaust gas recirculation (EGR) actuator module that controls opening of an EGR valve based on a third one of the current set of target values; and
a phaser actuator module that controls intake and exhaust valve phasing based on fourth and fifth ones of the current set of target values, respectively.
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Abstract
A requesting module generates a first torque request for an engine based on driver input. A conversion module converts the first torque request into a second torque request. A model predictive control (MPC) module determines a current set of target values based on the second torque request, a model of the engine, a tableau matrix, and a basic solution matrix. The MPC module: initializes the basic solution matrix to a predetermined matrix that is dual feasible; selectively iteratively updates the basic solution matrix and columns of the tableau matrix; determines changes for the target values, respectively, based on entries of the basic solution matrix resulting from the selective iterative updating; and determines the current set of target values by summing the changes with a last set of target values, respectively. An actuator module controls an engine actuator based on a first one of the current set of target values.
241 Citations
16 Claims
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1. An engine control system for a vehicle, comprising:
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a torque requesting module that generates a first torque request for a spark ignition engine based on driver input; a torque conversion module that converts the first torque request into a second torque request; a model predictive control (MPC) module that determines a current set of target values based on the second torque request, a model of the engine, a tableau matrix, and a basic solution matrix, wherein the MPC module; initializes the basic solution matrix to a predetermined matrix that is dual feasible; selectively iteratively updates the basic solution matrix and columns of the tableau matrix; determines changes for the target values, respectively, based on entries of the basic solution matrix resulting from the selective iterative updating; and determines the current set of target values by summing the changes with a last set of target values, respectively; and at least one of; a throttle actuator module that controls opening of a throttle valve based on a first one of the current set of target values; a boost actuator module that controls opening of a wastegate of a turbocharger based on a second one of the current set of target values; an exhaust gas recirculation (EGR) actuator module that controls opening of an EGR valve based on a third one of the current set of target values; and a phaser actuator module that controls intake and exhaust valve phasing based on fourth and fifth ones of the current set of target values, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An engine control method for a vehicle, comprising:
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generating a first torque request for a spark ignition engine based on driver input; converting the first torque request into a second torque request; determining, using model predictive control (MPC), a current set of target values based on the second torque request, a model of the engine, a tableau matrix, and a basic solution matrix, the determining including; initializing the basic solution matrix to a predetermined matrix that is dual feasible; selectively iteratively updating the basic solution matrix and columns of the tableau matrix; determining changes for the target values, respectively, based on entries of the basic solution matrix resulting from the selective iterative updating; and determining the current set of target values by summing the changes with a last set of target values, respectively; and at least one of; controlling opening of a throttle valve based on a first one of the current set of target values; controlling opening of a wastegate of a turbocharger based on a second one of the current set of target values; controlling opening of an exhaust gas recirculation (EGR) valve based on a third one of the current set of target values; and controlling intake and exhaust valve phasing based on fourth and fifth ones of the current set of target values, respectively. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification