# US 5,691,908 A · Method for actuator identification during the transverse profile control of a continuous material web > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,691,908 A - Document ID: US5691908A - Status: Granted - Kind: A - Application number: 08/448,349 - Filed: 1995-05-23 - Granted: 1997-11-25 - Earliest claimed: 1992-11-23 - Assignees: Siemens Aktiengesellschaft - Inventors: Jurgen Adamy - Web page: https://patentgrep.com/patent/US5691908A ## CPC - G05D 5/03: characterised by the use of electric means - B29C 48/08: flexible, e.g. films - B29C 48/31: {being} adjustable {, i.e. having adjustable exit sections} - B29C 48/92: Measuring, controlling or regulating - D21F 7/06: Indicating or regulating the thickness of the layer; Signal devices - D21G 9/0009: {Paper-making control systems} - B29C 2948/92114: Dimensions - B29C 2948/92428: Calibration, after-treatment, or cooling zone - B29C 2948/92609: Dimensions - B29C 2948/92904: Die; Nozzle zone - G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - D21F: PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON - D21G: CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES (winders or rewinders for finished products, means for adjustment of wrinkles or lateral extensions B65H) ## 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. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The method of claim 1, wherein the amplitudes of said measuring signals are evaluated by comparison with a detection threshold which depends on the number of the superimpositions and the amplitude of the profile change effected by the actuator adjustments. ### Claim 3 (depends on 2) The method of claim 2, wherein said actuators are respectively adjusted by such an absolute value that the profile change thereby effected corresponds to a standard deviation of the noise transverse profile. ### Claim 4 (depends on 1) The method of claim 1, wherein said measuring signals are evaluated with the aid of typical signal patterns by means of pattern recognition. ### Claim 5 (depends on 4) The method of claim 4, wherein the pattern recognition is carried out by means of a hierarchically stepped fuzzy-logic controller a last stage of said controller having as inputs the amplitude (A), the shape (F) and the expected location (O) of said measuring signals, and the output variable being the reliability (S) of detection for the profile changes effected by the actuator adjustments, it being the case that the shapes of the measuring signals are evaluated in higher-level stages which are fed as input variables the roughness and the width of said measuring signals as well as the distance and the depth, referred to the amplitude, of the right-hand or the left-hand secondary maxima, respectively. ### Claim 6 (depends on 4) The method of claim 4, wherein said actuators are respectively adjusted by such an absolute value that the profile change thereby effected corresponds to a standard deviation of the noise transverse profile. ### Claim 7 (depends on 1) The method of claim 1, wherein said actuators are respectively adjusted by such an absolute value that the profile change thereby effected corresponds to a standard deviation of the noise transverse profile. ### Claim 8 (depends on 7) The method of claim 7, wherein the adjustment is undertaken with the actuators distributed equidistantly over the entire width of the web. ### Claim 9 (depends on 1) The method of claim 1, wherein the adjustment is undertaken with the actuators distributed equidistantly over the entire width of the web. ### Claim 10 (depends on 1) The method of claim 1, wherein an assignment of the remaining actuators to corresponding measuring zones at the web end is performed by means of an interpolation function which contains as support points the values of the number of the identified actuators which has been determined. ### Claim 11 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. ### Claim 12 (depends on 11) The device of claim 11, comprising means for evaluating the amplitudes of said measuring signals by comparison with a detection threshold which depends on the number of the superimpositions and the amplitude of the profile change effected by the actuator adjustments. ### Claim 13 (depends on 11) The device of claim 11, comprising means for evaluating said measuring signals with the aid of typical signal patterns by means of pattern recognition. ### Claim 14 (depends on 13) The device of claim 13, comprising means for carrying out the pattern recognition by using a hierarchically stepped fuzzy-logic controller, having a last stage with inputs including the amplitude (A), the shape (F) and the expected location (O) of the measuring signals, and an output variable being the reliability (S) of detection for the profile changes effected by the actuator adjustments, it being the case that the shapes of the measuring signals are evaluated in higher-level stages which are fed as input variables the roughness (Ra) and the width (Br) of the measuring signals as well as the distance and the depth, referred to the amplitude, of the right-hand or the left-hand secondary maxima, respectively. ### Claim 15 (depends on 11) The device of claim 11, comprising means for respectively adjusting the actuators by such an absolute value that the profile change thereby effected corresponds to the standard deviation of the noisy transverse profile. ### Claim 16 (depends on 11) The device of claim 11, comprising means for adjusting actuators distributed equidistantly over the entire width of the web. ### Claim 17 (depends on 11) The device of claim 11, comprising means for assigning the remaining actuators to corresponding measuring zones at the web end by using an interpolation function which contains as support points the values of the number of the identified actuators which has been determined.