Method for optimizing a controlled system parameter
AssigneeSiemens Aktiengesellschaft
InventorsHolger Schulze, Hans Loffler
Life of this patent
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Abstract
A controlled system parameter is optimized by providing at periodic time intervals discrete adjustment steps derived from the difference, with alternating sign, between a constant component and a component which depends on the change of the control system parameter caused by the preceding adjustment step. An application of the method to a ball mill in a cement plant for optimizing its efficiency is shown.
Claims10
A method for optimizing a controlled system parameter which is responsive to a regulated variable which is an input to the controlled system comprising:
- a. measuring the controlled system parameter to be optimized;
- and
- b. generating a regulated variable as an input to the controlled system by adding to the previous value of the regulated variable periodically successive adjustment steps derived from the difference, with an alternating sign, between a constant component and a component depending on the change of the control system parameter caused by the preceeding adjustment step.
Apparatus for optimizing a controlled system parameter which changes in dependence upon a regulated variable input to the controlled system comprising:
- a. first means for storing the present value of the controlled system parameter reached as a result of an adjustment step;
- b. second means for storing the previous value of the controlled system parameter reached in a preceeding adjustment step, said second storage means being coupled to receive an updating input from said first storage means;
- c. means for differencing the outputs of said first and second storage means;
- d. means for adding a constant signal to the output of said means for differencing;
- e. means for reversing the polarity of the output of said means for adding;
- f. control means for providing outputs at fixed time intervals for loading and clearing said first and second means for storing and for alternatively actuating said reversing means.
Dependencies are inferred from the claim text.