Method for actuator identification during the transverse profile control of a continuous material web
AssigneeSiemens Aktiengesellschaft
InventorJurgen Adamy
Life of this patent
Estimating the term…
Abstract
A number of identified actuators are adjusted by identical absolute values which have an effect on a web end only within a noise level. A series of transverse profile measurements are then carried out, from which in each case a previously determined mean value of the transverse profile is subtracted and the results are superimposed until a number of measuring signals, which corresponds to the actuators to be identified, stands out in a clearly recognizable fashion in terms of amplitude and/or shape from the superimposed noise components of the transverse profile.
Claims17
A method for actuator identification during the transverse profile control of a continuous material web such as a paper or plastic web, comprising the steps of:
- a) determining the temporal mean value of a transverse profile at a web end from a number of successive measurements with manipulated variables held constant;
- b) storing the determined temporal mean value;
- c) adjusting a specific number of identified actuators using identical absolute values which have an effect on the web end only within a noise level of the transverse profile;
- d) measuring a transverse profile of the web;
- e) subtracting the temporal mean value obtained in step a) from the transverse profile measured in step d);
- f) repeating steps d) and e) to the accompaniment of superimposition of the results obtained thereby, until a number of measuring signals, which corresponds to the number of identified actuators stands out in a clearly recognizable fashion in terms of amplitude and shape from the superimposed noise components of the transverse profile.
A programmed device for carrying out a method for actuator identification during the transverse profile control of a continuous material web, comprising:
- a) means for determining and storing a temporal mean value of a transverse profile at a web end from a number of successive measurements with manipulated variables kept constant;
- b) means for adjusting a specific number of identified actuators with the same absolute values, which have an effect on the web end only within the noise level of the transverse profile;
- c) means for iterative measurement of a transverse profile of the web, accompanied by respective subtraction of the stored temporal mean value from said measurement;
- d) means for superimposing the results from the operation of element (c) and for discontinuing the iteration when a number of measuring signals, which corresponds to the actuators to be identified, stands out in a clearly recognizable fashion in terms of amplitude and shape from the superimposed noise components of the transverse profile.
Dependencies are inferred from the claim text.