US 12,565,995 B2Granted

Closed-loop control of a combustion apparatus

AssigneeSiemens Aktiengesellschaft

InventorsRainer Lochschmied, Bernd Schmiederer

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Abstract

Various embodiments include a combustion apparatus comprising: a control facility for open- and/or closed-loop control of the apparatus; a combustion chamber; an actuator adjusting an air supply; and a combustion sensor in a region of a flame of the chamber. The control facility stores a list of support points. A first air supply value is assigned to each support point. A drift test value and an index for ascertainment of a test result are assigned to each support point. The controller: generates a specified air supply; selects a support point as a function of the air supply; and decides on a test result using the index for the support point. To ascertain a test result: receives a signal from the combustion sensor; determines a new test result; ascertains a changed drift test value for the selected support point; and stores the changed drift test value as the drift test value.

Claims19

Dependent claims

A combustion apparatus comprising:

a control facility for open-loop and/or closed-loop control of the combustion apparatus;
a combustion chamber;
an actuator adjusting an air supply for the combustion chamber;
and
a combustion sensor arranged, during operation of the combustion apparatus, in a region of a flame of the combustion chamber;
wherein the control facility comprises a memory storing a list of support points;
a first air supply value is assigned to each support point from the list of support points;
a drift test value and an index for ascertainment of a test result are assigned to each support point from the list of support points;
and
the control facility is configured to:
generate a specified air supply for the combustion chamber on the basis of the actuator;
after generating the specified air supply, select a support point from the list of support points as a function of the specified air supply and on the basis of the first air supply values;
decide on the ascertainment of a test result on the basis of the index for the selected support point;
in case of a decision in favor of the ascertainment of a test result:
receive a signal from the combustion sensor;
determine a new test result from the signal;
ascertain a changed drift test value for the selected support point as a function of the new test result;
and store the changed drift test value in the memory as the drift test value assigned to the selected support point;
wherein after generating the specified air supply, the control facility is further configured to:
form in each case differences between the specified air supply and the first air supply values;
select from the formed differences the negative difference whose value is the lowest;
select from the formed differences the positive difference whose value is the lowest;
select from the at least one list of support points the support point, which pertains to the negative difference with the lowest value, as the first support point;
and select from the list of support points a second support point which pertains to the positive difference with the lowest value.

21 more elements

A combustion apparatus comprising:

a control facility for open-loop and/or closed-loop control of the combustion apparatus;
a combustion chamber;
an actuator adjusting an air supply for the combustion chamber;
and
a combustion sensor arranged, during operation of the combustion apparatus, in a region of a flame of the combustion chamber;
wherein the control facility comprises a memory storing a list of support points;
a first air supply value is assigned to each support point from the list of support points;
a drift test value and an index for ascertainment of a test result are assigned to each support point from the list of support points;
and
the control facility is configured to:
generate a specified air supply for the combustion chamber on the basis of the actuator;
after generating the specified air supply, select a support point from the list of support points as a function of the specified air supply and on the basis of the first air supply values;
decide on the ascertainment of a test result on the basis of the index for the selected support point;
in case of a decision in favor of the ascertainment of a test result:
receive a signal from the combustion sensor;
determine a new test result from the signal;
ascertain a changed drift test value for the selected support point as a function of the new test result;
and store the changed drift test value in the memory as the drift test value assigned to the selected support point;
wherein, after generating the specified air supply, the control facility is further configured to:
form in each case differences between the specified air supply and the first air supply values;
select the difference whose value is the lowest;
and select from the list of support points the support point which pertains to the difference with the lowest value;
wherein the control facility is further configured to:
ascertain a first percentage as a function of the difference with the lowest value;
and ascertain the changed drift test value for the selected support point by weighting the new test result according to the first percentage and by weighting the drift test value assigned to the selected support point according to a second percentage.

22 more elements

Dependencies are inferred from the claim text.