Controller for plant
First Claim
1. A control device for a plant, comprising:
- a first estimated value calculating means for calculating an estimated value of a first physical quantity, which is at least one of a plurality of physical quantities indicating a state of the plant, by way of a predetermined algorithm based on a plurality of inputs;
a second estimated value calculating means for calculating an estimated value of a second physical quantity, which correlates with the first physical quantity, by way of a predetermined algorithm based on a plurality of inputs;
a detection means for detecting the second physical quantity; and
an adaptive input calculating means for calculating an adaptive input to be mutually inputted to the first estimated value calculating means and the second estimated value calculating means, so that deviation between a detected value of the second physical quantity detected by way of the detection means and the estimated value of the second physical quantity calculated by way of the second estimated value calculating means becomes a minimum,wherein a predetermined control variable of the plant is controlled based on the estimated value of the first physical quantity.
1 Assignment
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Accused Products
Abstract
A controller for a plant that controls a controlled variable for the plant in accordance with estimated values, allowing to reduce any error in the estimated values that is caused by solid variation or aging of the plant. A controller for an exhaust emission control system has an estimated Inert-EGR value calculation section (711) to calculate the estimated value IEGRHAT for the Inert-EGR amount on the basis of an input vector U through a neural network, an estimated LAF sensor output value calculation section (712) to calculate the estimated value ΦHAT for an exhaust air-fuel ratio correlating with the Inert-EGR amount on the basis of the input vector U through the neural network, an LAF sensor (34) to detect the exhaust air-fuel ratio, and a nonlinear adaptive corrector (713) to calculate the adaptive input UVNS such that the estimated error EHAT between the detected value ΦACT from the LAF sensor (34) and the estimated output value ΦHAT of the LAF sensor (34) is minimized.
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Citations
13 Claims
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1. A control device for a plant, comprising:
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a first estimated value calculating means for calculating an estimated value of a first physical quantity, which is at least one of a plurality of physical quantities indicating a state of the plant, by way of a predetermined algorithm based on a plurality of inputs; a second estimated value calculating means for calculating an estimated value of a second physical quantity, which correlates with the first physical quantity, by way of a predetermined algorithm based on a plurality of inputs; a detection means for detecting the second physical quantity; and an adaptive input calculating means for calculating an adaptive input to be mutually inputted to the first estimated value calculating means and the second estimated value calculating means, so that deviation between a detected value of the second physical quantity detected by way of the detection means and the estimated value of the second physical quantity calculated by way of the second estimated value calculating means becomes a minimum, wherein a predetermined control variable of the plant is controlled based on the estimated value of the first physical quantity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification