EP2480351B1 - Control method for a processing line for a stretched rolling stock - Google Patents

Description

• wobei die Behandlungsanlage zumindest einen vorgeordneten Anlagenteil und einen nachgeordneten Anlagenteil aufweist, die von dem Walzgut unmittelbar nacheinander durchlaufen werden,
• wobei der vorgeordnete oder der nachgeordnete Anlagenteil als Fertigstrasse ausgebildet ist, in der das Walzgut querschnittreduzierend gewalzt wird, und der andere Anlagenteil als von der Fertigstrasse verschiedener Anlagenteil ausgebildet ist,
• wobei einer Steuereinrichtung für die Behandlungsanlage für Abschnitte des die Behandlungsanlage durchlaufenden Walzgutes jeweils zumindest eine Endgröße vorgegeben ist,
• wobei die jeweilige Endgröße aus einem jeweiligen gewünschten Endzustand abgeleitet ist, den der jeweilige Abschnitt des Walzgutes nach dem Durchlaufen des nachgeordneten Anlagenteils aufweisen soll.

The present invention relates to a control method for a treatment plant for an elongated rolling stock, in particular a strip-shaped rolling stock,

• wherein the treatment plant has at least one upstream plant part and a downstream plant part, which are passed through by the rolling stock immediately after each other,
• wherein the upstream or the downstream part of the plant is designed as a finishing train, in which the rolling stock is rolled Querschnittreduzierend, and the other part of the plant is formed as different from the finishing train part of the plant,
• wherein a control device for the treatment plant for each section of the rolling mill passing through the treatment plant is given at least one final size,
• wherein the respective final size is derived from a respective desired final state, which the respective section of the rolling stock should have after passing through the downstream part of the plant.

The present invention further relates to a computer program which has machine code which can be processed directly by a control device for a treatment plant for a rolling stock, in particular a strip-shaped rolling stock, and whose processing by the control device causes the control device to carry out such a control method.

The present invention further relates to a control device for a treatment plant for a rolling stock, in particular a strip-shaped rolling stock, which is designed such that it performs such a control method in operation.

The aforementioned objects are well known. Purely by way of example is on the DE 101 56 008 A1 or the corresponding one US Pat. No. 7,197,802 B2 directed. Also the EP 1 596 999 B1 or the corresponding ones US Pat. No. 7,251,971 B2 and US 7,310,981 B2 can be mentioned in this context.

In the control methods of the prior art, usually each piece of equipment is controlled separately by itself. If - purely by way of example - the upstream part of the plant is designed as a finishing train and the downstream part of the plant is designed as a cooling section, in the prior art usually the finishing train is operated such that the sections of the rolling stock at the outlet of the finishing train (= inlet of the cooling section) a predetermined Endwalztemperatur exhibit. Then cooling of the sections of the rolling stock takes place in the cooling section, so that the sections of the rolling stock leave the cooling section at a predetermined reel temperature. A tuning of the operation of the two parts of the system takes place in the prior art only in that the final rolling temperature of the respective section is detected metrologically and the cooling section is specified as the starting value for the respective section.

The procedures of the above-mentioned prior art already represent an advance over the conventional state of the art. For in this prior art, a system-spanning control of the treatment plant takes place. In particular, expected temperatures which are determined by means of a plant-subordinate model can be updated in cycles for each section of the rolling stock. On the basis of the respectively expected temperatures and the corresponding setpoint temperatures, in each case a manipulated variable is determined in the prior art which is output to a device which directly influences the state of the respective section of the rolling stock.

The manipulated variable detectors, by means of which the manipulated variables for the individual devices are determined, can be considered conventional Controller be designed, for example, as a P, PI or PID controller. It is already known from the cited prior art to design the controllers as prediction controllers which have a prediction horizon. In particular, the latter approach already leads to relatively good results. However, the last-mentioned approaches can still be improved, in particular with regard to the configuration of the manipulated variable determination. The object of the present invention is to carry out a corresponding improved control variable determination.

The object is achieved by a control method having the features of claim 1. Advantageous embodiments of the control method according to the invention are the subject of the dependent claims 2 to 12.

• dass die Steuereinrichtung mindestens einen Stellgrößenermittler implementiert,
• dass der Stellgrößenermittler an mindestens eine den Zustand mindestens eines der Abschnitte des die Behandlungsanlage durchlaufenden Walzgutes beeinflussende Einrichtung eine Stellgröße ausgibt,
• dass der Stellgrößenermittler die Stellgröße zu einem Zeitpunkt ausgibt, zu dem der mindestens eine Abschnitt sich im vorgeordneten Anlagenteil befindet,
• dass der Stellgrößenermittler bei der Ermittlung der Stellgröße modellgestützt ermittelte erwartete Zustände des mindestens einen Abschnitts des Walzgutes berücksichtigt, die innerhalb eines ersten Prognosehorizonts des jeweiligen Reglers liegen, und
• dass der erste Prognosehorizont derart bestimmt ist, dass der Stellgrößenermittler bei der Ermittlung der von ihm ausgegebenen Stellgröße mindestens einen für den mindestens einen Abschnitt des Walzgutes prognostizierten Zustand berücksichtigt, der für den mindestens einen Abschnitt des Walzgutes im nachgeordneten Anlagenteil erwartet wird.

According to the invention - in addition to the features mentioned above - provided

• the control device implements at least one manipulated variable determiner,
• that the manipulated variable determiner outputs a manipulated variable to at least one device which influences the state of at least one of the sections of the rolling stock passing through the treatment plant,
• that the manipulated variable investigator outputs the manipulated variable at a time when the at least one section is located in the upstream part of the installation,
• that the manipulated variable investigator takes into account model-based expected states of the at least one section of the rolling stock which are within a first forecasting horizon of the respective controller, and
• that the first prognosis horizon is determined in such a way that the manipulated variable investigator, when determining the manipulated variable output by it, takes into account at least one state predicted for the at least one section of the rolling stock which is expected for the at least one section of the rolling stock in the downstream part of the installation.

• dass die Steuereinrichtung für jeden Abschnitt des Walzgutes jeweils einen Stellgrößenermittler implementiert, der während des gesamten Durchlaufs des jeweiligen Abschnitts des Walzgutes durch die Behandlungsanlage als lokaler Stellgrößenermittler an den jeweiligen Abschnitt des Walzgutes gekoppelt bleibt, und
• dass der jeweilige lokale Stellgrößenermittler dann an eine den Zustand des die Behandlungsanlage durchlaufenden Walzgutes lokal beeinflussende Einrichtung eine Stellgröße ausgibt, wenn die jeweilige Einrichtung auf den jeweiligen Abschnitt des Walzgutes wirkt.

In a possible embodiment of the present invention, it is provided

• that the control device for each section of the rolling stock each implementing a manipulated variable, which remains coupled during the entire passage of the respective section of the rolling stock through the treatment plant as a local manipulated variable to the respective section of the rolling stock, and
• that the respective local manipulated variable investigator then outputs a manipulated variable to a device locally influencing the state of the rolling mill passing through the treatment plant when the respective device acts on the respective section of the rolling stock.

As a result, the manipulated variable determination can be simplified.

Preferably, it is provided in this embodiment that at least one of the state of the treatment plant passing through rolling material locally influencing facilities is arranged in the upstream part of the plant.

The control device may alternatively be formed as a single, not divided into a plurality of sub-control devices, controlling the entire treatment plant control device or be divided into several sub-control devices. In the last-mentioned case, the respective manipulated variable determiner is preferably implemented by the treatment installation on one and the same sub-control device during the entire passage of the respective section of the rolling stock.

Alternatively or in addition to the local manipulated variable detectors, the control device can implement a manipulated variable detector for all sections of the rolling stock, which acts as a global manipulated variable determinator on the mass flow of the rolling stock.

• dass die von den lokalen Stellgrößenermittlern entsprechend der obenstehend erläuterten Weise ermittelten Stellgrößen zunächst vorläufige Stellgrößen sind, wobei die lokalen Stellgrößenermittler die vorläufigen Stellgrößen unter der Annahme ermitteln, dass ein momentan gegebener Massenflussverlauf nicht verändert wird,
• dass der globale Stellgrößenermittler anhand von Eingangsgrößen einen neuen Massenflussverlauf ermittelt,
• dass die Eingangsgrößen zumindest die von den lokalen Stellgrößenermittlern ermittelten vorläufigen Stellgrößen sowie mindestens eine Bewertungsgröße für die vorläufigen Stellgrößen umfassen, wobei die Bewertungsgröße eine minimal mögliche Stellgröße, eine maximal mögliche Stellgröße, eine maximal mögliche Stellgrößenänderung oder ein Zwischenwert ist, der zwischen der minimal möglichen Stellgröße und der maximal möglichen Stellgröße liegt, und
• dass die lokalen Stellgrößenermittler ihre endgültigen Stellgrößen anhand der vorläufige Stellgrößen, des momentan gegebenen Massenflussverlaufs und des neuen Massenflussverlaufs ermitteln.

If both the global and the local manipulated variable investigators are implemented, it is preferably provided that

• that the manipulated variables determined by the local manipulated variable investigators in accordance with the manner explained above are initially provisional manipulated variables, wherein the local manipulated variable investigators determine the provisional manipulated variables on the assumption that a currently given mass flow profile is not changed,
• that the global manipulated variable determiner determines a new mass flow profile based on input variables,
• that the input variables comprise at least the provisional manipulated variables determined by the local manipulated variable detectors and at least one evaluation variable for the provisional manipulated variables, wherein the evaluation variable is a minimum possible manipulated variable, a maximum manipulated variable, a maximum possible manipulated variable change or an intermediate value between the minimum possible manipulated variable and the maximum possible manipulated variable, and
• that the local manipulated variable investigators determine their final manipulated variables on the basis of the provisional manipulated variables, the currently given mass flow profile and the new mass flow profile.

Further input variables of the global manipulated variable determiner can be determined as required. It is preferably provided that the input variables also include expected states of at least one section of the rolling stock that has not yet entered the upstream part of the installation and / or expected preliminary manipulated variables determined by a corresponding local control-variable determiner for this section of the rolling stock and the respective corresponding evaluation variable.

As a rule, the at least one manipulated variable detector outputs at a plurality of points in time an actuating variable to the device which influences the state of at least one of the sections of the rolling stock passing through the treatment system. In this case, often the time interval of a first and a second of the times is smaller than the first forecast horizon. This makes it possible that the at least one Stellgrößenermittler for determining the output of the first time manipulated variable a for the second of the times expected control variable determined and this expected manipulated variable in the determination of temporally after the second of the times, but still within the first forecast horizon predicted states considered. In particular, the at least one manipulated variable determiner can be designed as a model-predictive controller.

The first forecast horizon can be determined as needed. In particular, the first prognosis horizon can be determined in such a way that it extends at least from the initial influencing of the state of the rolling stock in the upstream part of the installation to the outlet of the rolling stock from the downstream part of the installation.

As far as described so far, the prognosis refers only to the individual sections of the rolling stock. The control method can be further improved in that the control device determines expected states of the respective device for at least one of the devices affecting the state of the rolling stock within a second forecast horizon, and the control device determines the states of the respective device expected during the second forecast horizon when determining the taken into account the manipulated variable detectors output to the respective device manipulated variables.

In a preferred embodiment of the control method according to the invention, it is provided that the at least one manipulated variable determinants determine the manipulated variable by optimizing (ie maximizing or minimizing) an objective function, wherein in the target function except the deviation of a predicted state of at least a portion of the rolling stock of a corresponding desired state energy consumption the treatment plant is received. By doing so, it is possible to reduce and possibly even minimize the energy requirements of the treatment plant.

The finishing train usually has several rolling stands, which are passed through by the rolling stock during the passage of the finishing line in succession. The control method according to the invention is also applicable, inter alia, if no cooling devices are arranged in front of the rolling mill of the finishing train that has passed through first, and between the rolling stands of the finishing train.

It is possible that the upstream part of the plant is designed as a finishing train and the downstream part of the plant is designed as a cooling section. In another possible embodiment, the downstream part of the plant is designed as a finishing train. The upstream plant part is preferably formed in this case as a furnace, for example as an induction furnace. The control method according to the invention is particularly applicable to an embodiment of the treatment plant in which the furnace is preceded by a roughing, Vorstrus a continuous casting is arranged upstream and the plant is operated at a casting speed, so that a speed at which the rolling enters the finishing train , Is determined by the casting speed and the reduction in cross-section of the rolling stock in the roughing train.

The object is further achieved by a computer program of the type mentioned, whose machine code is designed such that its processing by the control device causes the control device executes an inventive control method. The computer program can in particular be stored on a data carrier in machine-readable form (in particular in an exclusively machine-readable form, for example electronically).

The object is further achieved by a control device for a treatment plant for a rolling stock, in particular a strip-shaped rolling stock, which is designed such that it carries out an inventive control method during operation.

FIG 1

schematisch eine Behandlungsanlage für ein Walzgut,

FIG 2 bis 5

mögliche Ausgestaltungen der Behandlungsanlage von FIG 1,

FIG 6 bis 9

Ablaufdiagramme und

FIG 10 und 11

mögliche Ausgestaltungen einer Steuereinrichtung.

Further advantages and details will become apparent from the following description of exemplary embodiments in conjunction with the drawings. In a schematic representation:

FIG. 1

schematically a treatment plant for a rolling stock,

FIGS. 2 to 5

possible embodiments of the treatment plant of FIG. 1 .

FIGS. 6 to 9

Flowcharts and

FIGS. 10 and 11

possible embodiments of a control device.

According to FIG. 1 For example, a treatment plant for an elongate rolling stock 1 has an upstream and a downstream plant part 2, 3. The upstream and downstream plant part 2, 3 are passed through by the rolling stock 1 immediately after one another. The rolling stock 1 may in particular be a strip-shaped rolling stock. It usually consists of a metal, for example steel, aluminum, copper, brass or another non-ferrous metal.

The upstream or downstream plant part 2, 3 is designed as a finishing train. In the embodiments of FIG. 2 and 3 the upstream plant part 2 is designed as a finishing train. In the embodiments according to the 4 and 5 the downstream system part 3 is designed as a finishing train.

Regardless of whether the upstream or downstream plant part 2, 3 is formed as a finishing train, the finishing train usually has a plurality of rolling stands 4, which are traversed by the rolling stock 1 during the passage of the finishing line in succession. In the rolling stands 4 of the finishing mill, the rolling stock 1 is rolled in a cross-section reducing manner. The number of rolling stands 4 is usually between 4 and 8, for example at 6 or 7. Alternatively, a reversing rolling can take place. In this case, a single roll stand 4 is usually available.

The other part of the plant 3, 2 is formed as part of the plant different from the finishing train. According to the FIG. 2 and 3 the downstream part of the plant is designed as a cooling section, which has a roller table 5 and cooling devices 6. In the cooling section, the cross section of the rolling stock 1 (with the exception of the thermal shrinkage) is not changed. In the cooling section, therefore, no reshaping of the rolling stock 1 takes place more. According to the 4 and 5 the upstream plant part 2 is formed as a furnace, for example as an induction furnace.

As in FIG. 1 indicated by dashed lines, it is possible that the upstream part of the plant 2 in turn a further part of the plant 7 is arranged upstream. For example, in the embodiments of the FIG. 2 and 3 the finishing train additionally be preceded by a furnace and / or other components. In the embodiment according to FIG. 5 For example, the furnace as a further part of the plant 7 upstream of a roughing. The roughing in turn is a continuous casting 8 upstream.

Likewise, the downstream part of the plant 3 according to the dashed representation of FIG. 1 be subordinate to other system parts 9. For example, in the embodiment of FIG. 4 the finishing train be subordinated as a further part of the system 9 a cooling section.

The other system parts 7, 9 can be integrated into the control concept explained in more detail below. Alternatively, it is possible to operate only the upstream and downstream plant part 2, 3 in the manner according to the invention and to operate the other plant parts 7, 9 in another way.

The boundaries between the plant parts 8, 7, 2, 3, 9 can be determined as needed. In particular, the boundaries between the plant parts 8, 7, 2, 3, 9 between the last active element of the respective upstream plant part 8, 7, 2, 3 and the first active element of each subordinate plant part 7, 2, 3, 9 are. The border between an oven and a furnace part 7 upstream, for example, the roughing 7, therefore, lies between the last frame of the roughing train 7 and the first heater 18 of the furnace. In an analogous manner, the boundary between an oven and the finishing line is between the last heating device 18 of the furnace and the first stand 4 of the finishing train. The boundary between the finishing train and the cooling section is between the last rolling stand 4 of the finishing train and the first cooling device 6 of the cooling section. If a temperature measuring station 19 (or another measuring station, for example for the strip thickness or the strip profile) is arranged between in each case two directly successive plant parts 8, 7, 2, 3, 9, preferably the location of the corresponding measuring device 19 forms the boundary between the plant parts 8, 7, 2, 3, 9.

The treatment plant of 1 to 5 is controlled by a control device 10 (only in FIG. 1 shown). The control device 10 is generally designed as a software programmable control device. This is in FIG. 1 indicated that within the control device 10, the letters "μP" are inscribed. The mode of operation of the control device 10 is therefore determined by a computer program 11. The computer program 11 has machine code 12, which can be processed directly by the control device 10. The execution of the machine code 12 by the control device 10 causes the control device 10 to carry out a control method which will be explained in more detail below. Due to the processing of the machine code 12, the control device 10 is designed such that it executes an inventive control method during operation.

The computer program 11 can be supplied to the control device 10 in any desired manner, for example via a computer-computer connection. In particular, a supply via the World Wide Web or a Local Area Network come into question. Alternatively, it is possible to supply the computer program 11 to the control device 10 via a mobile data carrier 13, on which the computer program 11 is stored in machine-readable form. By way of example, the mobile data carrier 13 is in FIG. 1 shown as a USB memory stick. However, it could also be designed differently.

The following will be in connection with FIG. 6 a possible control method according to the invention explained.

According to FIG. 6 In a step S1, the control unit 10 is supplied with an instantaneous state Z and the instantaneous location of a point 14 of the rolling stock 1. The current location is related to the processing plant. He is at the beginning of the upstream part of the plant 2, in the embodiment of FIG. 2 and 3 that is, for example, in front of the first rolling stand 4 of the finishing train. If the finishing mill as shown by FIG. 2 Interstand cooling means 15 and also before the first rolling stand 4 of the finishing train such an intermediate stand cooling device 15 is arranged, the place is also in front of this intermediate stand cooling device 15. Optionally, the place may also be further forward.

In the case of other embodiments of the treatment plant, for example, the embodiment according to FIG. 4 , the place is arranged elsewhere. For example, if a prefabricated furnace is included in the control method of the invention, the location must be in front of the furnace, more precisely in front of the first heater 18 of the furnace. In general, the location must be arranged before the beginning of the first part of the installation involved in the control method according to the invention or even further in front.

The state Z can be specified to the control device 10 from the outside or otherwise predetermined. Alternatively, it can be detected metrologically. Also mixed forms are possible. For example, to determine the energetic state of the relevant point 14 at the current location, a temperature measuring station 19 may be arranged, by means of which the current temperature T of the point 14 of the rolling stock 1 at whose surface is detected. The temperature profile over the thickness of the rolling stock 1 can be determined, for example, via a model. Such models are well known to those skilled in the art.

It is possible that the energetic state is already completely described by the temperature T of the point 14. In practice, the temperature T is often in a range in which, based on the temperature, it can be clearly decided in which phase state the rolling stock 1 is present. For example, when rolling steel, the temperature at the entrance of the finishing train is usually 1,000 ° C or more and thus far above the transformation temperature (about 723 ° C to 911 ° C) of steel. It is therefore known that the rolling stock 1 is in the phase state "austenite" in this case.

The dimensions of the rolling stock 1 - for example, in a strip-shaped rolling stock, the strip thickness and the bandwidth - can be determined otherwise or the control device 10 may be known in other ways.

In a step S2, the control device 10 uses a desired final state Z *, which the point 14 should have after passing through the downstream system part 3, to determine a desired final variable. For example, the control device 10 can determine a desired end enthalpy, a desired final temperature, a desired phase fraction of the rolling stock 1, for example the proportion of austenite in steel etc. Alternatively, for determining the final size, the desired end size of the control device 10 can also be specified.

In a step S3, the detected point control means 10 implements a manipulated variable determiner 16 (see FIG FIGS. 10 and 11 ). The manipulated variable determiner 16 is initialized and started in the context of the step S3 with the state Z of the corresponding point 14. The manipulated variable detector 16 is coupled as a local manipulated variable determiner 16 to the respective point 14 of the rolling stock 1. He stays during the entire run of the point 14 through the treatment plant to this point 14 coupled.

The implemented local manipulated variable determiner 16 always outputs a manipulated variable S to a device of the treatment system when the respective device acts on the respective point 14 of the rolling stock 1. The respective device influences the state Z of the rolling mill 1 passing through the treatment plant only locally, ie at the point at which the respective device is arranged. Other locations of the rolling stock 1 may be influenced by other facilities, but not by this facility, at the time the facility concerned acts on the point 14 of the rolling stock 1 concerned.

The times at which the individual facilities of the treatment plant - for example, the cooling devices 6 and the interstand cooling devices 15 of FIG. 2 or the heaters 18 of the furnace of FIG. 4 - Act on the corresponding point 14 of the rolling stock 1, can be determined easily. In particular, it is possible to implement a path tracking system known to the person skilled in the art.

In a step S4, the local manipulated variable determiner 16 applies a provisional manipulated variable profile. In a step S5, the local manipulated variable determiner 16 determines an expected state of the corresponding point 14 that is expected at the end of the forecast horizon within a forecast horizon based on a model 17 of the rolling stock 1 implemented within the control device 10. The local manipulated variable determiner 16 determines the expected state of the corresponding point 14 on the assumption that a currently given mass flow path, with which the corresponding point 14 is likely to pass through the treatment plant now and in the future, is not changed.

As a rule, time-dependent differential equations must be solved to determine the expected state. It is in this case, it is necessary to update the state in small time steps. In this case, therefore, the entire state history is determined.

The corresponding models 17 are known as such and not the subject of the present invention. They are based on Fourier's equation of heat transfer, phase transformation models, heat transfer models, rolling models, etc.

As part of the prognosis, the local manipulated variable determiner 16, on the one hand, takes into account the manipulated variable S with which it next controls one of the devices Z influencing the state Z of the corresponding point 14.

In individual cases - for example, if only a single heater 18 is present - the local manipulated variable determiner 16 outputs a manipulated variable S only at a single point in time. As a rule, however, the local command value determiner 16 outputs a manipulated variable S at several points in time to the device which directly influences the respective point 14 of the rolling stock 1. If the time interval of the further time points from the instant at which the local manipulated variable determinator outputs its manipulated variable S is smaller than the prognosis horizon of the local manipulated variable determiner 16, the local manipulated variable determiner 16 determines not only the manipulated variable S to be output next but also for the inside Each of the additional time points lying in the forecast horizon has an expected manipulated variable. Here, too, the local manipulated variable determiner 16 assumes that the instantaneous mass flow profile, with which the point under consideration 14 is likely to pass now and in the future, does not change. Of course, the local command variable determiner 16 takes the determined manipulated variables determined into account when determining the state of the corresponding point 14 of the rolling stock 1 expected at the end of the forecast horizon. The local manipulated variable determinator 16 can be designed for this purpose, in particular, as a model predictive controller.

In a step S5, the local manipulated variable determiner 16 determines its manipulated variable S by optimizing (i.e., minimizing or maximizing) an objective function. The deviation of the predicted state from a corresponding desired state of the point 14 of the rolling stock 1 is, of course, entered into the objective function. Alternatively, the states themselves or quantities derived from the states can be used here.

In addition to the desired final state, the control device 10 can also be predetermined for other locations of the treatment plant and / or for certain times, calculated from the arrival of the corresponding point 14 of the rolling stock 1 in the treatment plant, desired intermediate states. If this is the case, of course corresponding desired intermediate variables are determined for the corresponding locations and / or times and taken into account in the determination of the manipulated variable S of the local manipulated variable determiner 16.

The objective function is usually a function with a large number of variables. The objective function is usually minimized (or maximized) according to the SQP procedure. The SQP process is known to those skilled in the art.

The local manipulated variable determiner 16 outputs the manipulated variable S, which is determined by it, to be currently outputted in a step S7 to the device by means of which the state Z of the relevant point 14 can be influenced at the moment. The corresponding device determines the control device 10, for example by means of the already mentioned tracking. Furthermore, the respective local manipulated variable determiner 16 updates the state Z of the point 14 assigned to it.

As already mentioned and also in FIG. 2 illustrated, the local manipulated variable determiner 16, for example, on cooling devices 6, 15 act. The cooling devices can in the cooling section of FIG. 2 be arranged. Alternatively or additionally, the cooling devices can be arranged in the finishing train be, in the according to FIG. 2 Likewise, for example, in the embodiments of 4 and 5 the local manipulated variable detector 16 act on the heaters 18 of the furnace. Also in this case, the corresponding devices are thus arranged in the upstream part of the plant 2.

The prediction horizon of the local manipulated variable determiner 16 is suitably determined. In particular, it is determined in such a way that, at normal rolling speeds, the local command value determiner 16 is triggered at a point in time when it activates a device located in the upstream part of the installation 2 (for example in the embodiment according to FIG FIG. 2 one of the intermediate stand cooling devices 15 or in the embodiment according to FIG. 4 one of the heaters 18 of the furnace) takes into account a predicted state of the corresponding point 14 of the rolling stock 1, which is assumed by the corresponding point 14 of the rolling stock 1 only when the corresponding point 14 is located in the downstream part of the plant 3.

This situation is in FIG. 2 clearly illustrated by the fact that purely by way of example various possible forecasting horizons are drawn. The possible forecast horizons are in FIG. 2 designated by the reference numerals PH1 to PH3.

According to the prognosis horizon PH1, when determining the manipulated variable S for the last interstate cooling device 15 of the finishing train, the local manipulated variable determiner 16 considers expected states of the corresponding point 14 of the rolling stock 1, which the corresponding point 14 assumes only in the cooling section. In accordance with the prognosis horizon PH2, this is already the case when the local manipulated variable determiner 16 determines the manipulated variable S for the penultimate interstate cooling device 15. According to the prognosis horizon PH3, the prognosis horizon may even be determined in such a way that it changes from the first influencing of the state of the Rolled material 1 in the upstream part of the plant 2 (ie, for example FIG. 2 in the case of the intermediate stand cooling device 15 upstream of the first rolling stand 4, in the embodiment according to FIG FIG. 4 in the first heating device 18) extends to the expiry of the rolling stock 1 from the downstream part of the plant 3. Analogous embodiments of course also apply in the embodiments of the treatment plant according to the 3, 4 and 5 ,

The forecast horizon can be static or dynamic. Preferably, the forecast horizon at the beginning of the forecast is static until the forecast horizon reaches the end of the downstream plant part 3 (or in general of the last part of the plant involved in the control process according to the invention). Thereafter, the forecast horizon is preferably shortened dynamically, so that it extends from the respective current position of the local control variable determiner 16 associated point 14 to the end of the downstream part of the plant 3. In this case, one can imagine the prognosis horizon like a telescope rod, in which one end is bound to the point 14 assigned to the respective local manipulated variable determiner 16 and the other end "protrudes into the future". The telescopic rod remains extended until the other end "abuts" the end of the downstream equipment part 3. Thereafter, the telescopic rod is "pushed together" accordingly.

In steps S8 and S9, the control device 10 checks whether the relevant point 14 has exited the downstream system part 3, that is, for example, in the embodiment of FIG FIG. 2 has left the cooling section. If not, the controller 10 returns to step S4. If so, the controller 10 proceeds to step S10. In step S10, the control device 10 deletes the local command value determiner 16 implemented for the leaked point 14. The leaked point 14 is not considered further, at least in the context of the control method according to the invention.

Optionally, it is possible between the individual plant parts 2, 3 and / or behind the downstream part of the plant 3 -. According to the embodiment of FIG. 2 Thus, for example, between the finishing train and the cooling section and / or behind the cooling section - to arrange further measuring devices 19, by means of which a correlated with the desired final size size G is detected, for example, the temperature T of the corresponding point 14 of the rolling stock 1. In this way it is For example, it is possible to adapt the model 17. The corresponding procedure is known as such and as such is not the subject of the present invention.

The procedure of FIG. 6 is executed clocked. For example, a new point 14 of the rolling stock 1 is detected in each case with a work cycle which is generally between 0.1 and 1.0 seconds. Preferred values of the power stroke are between 0.2 and 0.5 seconds, for example 0.3 seconds. The controller 10 performs the above in connection with FIG. 6 therefore explained in parallel for all points 14, which are at a certain time in the treatment plant.

Furthermore, the rolling stock 1 when entering the upstream part of the plant 2 a - constant or variable - input speed v on. Each of the points 14 therefore corresponds to a portion of the rolling stock 1 whose length is the product of the power stroke with the instantaneous input speed v, with which the corresponding point 14 enters the upstream part of the plant 2.

The following in conjunction with FIG. 7 explained method is preferably in the embodiment of the treatment plant according to FIG. 2 or FIG. 3 applied. The method comprises steps S11 to S24. The steps S11 to S20 correspond to 1: 1 with the steps S1 to S10 of FIG FIG. 6 , For the steps S11 to S20, therefore, no further explanations are required.

In step S21, the controller 10 implements a global manipulated variable determiner 20 (see FIG FIGS. 10 and 11 ). The global manipulated variable determinator 20 acts on the mass flow of the rolling stock 1 and thus on all points 14 / sections 14 of the rolling stock 1 at the same time. The integration of the global manipulated variable determinant 20 in the control method according to the invention is achieved by the steps S22 and S23.

In step S22, the global manipulated variable determiner 20 determines a new mass flow profile. The determination is made on the basis of the manipulated variables S determined by the local manipulated variable detectors 16 in step S16. In the course of step S22, the global manipulated variable determinator 20 preferably takes into account both the manipulated variables S to be output by the local manipulated variable detectors 16 in step S17 and those determined by the local manipulated variable detectors 16 expected manipulated variables that are within the forecast horizon of the local manipulated variable determinants 16.

• eine minimal mögliche Stellgröße,
• eine maximal mögliche Stellgröße,
• einen Zwischenwert, der zwischen der minimal möglichen Stellgröße und der maximal möglichen Stellgröße liegt, und
• eine maximal mögliche Stellgrößenänderung.

As part of step S22, the global manipulated variable determinator 20 evaluates the manipulated variables S of the local manipulated variable determiners 16 based on at least one evaluation variable. Both the evaluation variables and the manipulated variables S determined by the local manipulated variable determinants 16 thus represent input variables of the global manipulated variable determinant 20. The evaluation variables may be (per local manipulated variable determiner 16) in particular at least one of the following variables:

• a minimum possible manipulated variable,
• a maximum possible manipulated variable,
• an intermediate value which lies between the minimum possible manipulated variable and the maximum possible manipulated variable, and
• a maximum possible manipulated variable change.

The first three of the variables mentioned are for each manipulated variable (regardless of whether output in step S15 or only within the forecast horizon) in each case to the device 6, 15, 18, to which the respective local manipulated variable determiner 16 acts at the corresponding output time. The consideration of the maximum possible manipulated variable change is only meaningful if the global manipulated variable determinator 20 sets a number of manipulated variables S in relation to one another, which are output from the same local manipulated variable determiner 16 or from several local manipulated variable detectors 16 to the same device 6, 15, 18 in succession.

• wenn die Stellgrößen S der lokalen Stellgrößenermittler 16 sich der minimalen Stellgrenze und/oder der maximalen Stellgrenze annähern,
• wenn die Stellgrößen S der lokalen Stellgrößenermittler 16 sich zu weit von dem Zwischenwert entfernen und/oder
• wenn eine angeforderte Stellgrößenänderung sich der maximal möglichen Stellgrößenänderung annähert.

In particular, the global manipulated variable determinator 20 can establish and optimize a target function analogous to the local manipulated variable determinants 16. In particular, the objective function may include penalty terms that are penalized

• if the manipulated variables S of the local actuating variable determinants 16 approximate the minimum actuating limit and / or the maximum actuating limit,
• if the manipulated variables S of the local manipulated variable determinants 16 are too far removed from the intermediate value and / or
• when a requested manipulated variable change approaches the maximum possible manipulated variable change.

In an analogous manner, the manipulated variables S 'of the global manipulated variable determiner 20 can also be evaluated.

By varying the mass flow profile, the global manipulated variable determiner 20 attempts to optimize the evaluation in step S22. For example, the global manipulated variable determiner 20 attempts to keep the manipulated variables S to be output and expected by the local manipulated variable determinants 16 within the permissible range, spaced as far as possible from the manipulation limits and to keep the expected rates of change within the permissible frame. At the same time, the global manipulated variable determinant 20 takes into account the corresponding limits for the mass flow. The global manipulated variable determiner 20 can also be designed as a model-predictive controller.

In step S23, the local manipulated variable determinants 16 determine their final manipulated variables S on the basis of the provisional manipulated variables, the mass flow profile newly determined in step S22, and the previously valid mass flow profile. In contrast to step S16, in which the local manipulated variable investigators have to calculate the expected state of the corresponding section 14 of the rolling stock 1 up to its forecast horizon, in the context of step S20 it may be sufficient to scale only the manipulated variables S currently to be output. Even a complete recalculation is not excluded. Regardless of the concrete procedure, however, due to the modification of the manipulated variables S in step S23, the manipulated variables S determined in step S16 are only provisional manipulated variables S.

In step S17, only the local manipulated variable determinants 16 output their manipulated variable S to the corresponding devices 6, 15, 18. In a step S24, which is carried out virtually simultaneously to step S17, the global manipulated variable determiner 20 outputs to actuators for the mass flow - for example to speed controls 21 for the rolling stands 4 - corresponding manipulated variables S 'from.

The in conjunction with FIG. 7 described procedure is particularly important if appropriate FIG. 3 no interstand cooling devices 15 are present. However, it is possible even when the interstand cooling means 15 are present. Regardless of whether the inter-frame cooling devices 15 are present or not, the global manipulated variable determiner 20 outputs its manipulated variables S 'at a point in time at which a plurality of sections 14 in the upstream system part 2 (according to FIG FIG. 2 and FIG. 3 for example, the finishing train) are located.

Analogous to the local manipulated variable determinants 16, the global manipulated variable determiner 20 also has a prognosis horizon. The forecast horizon can be analogous to FIG. 2 be determined as needed. It can be equal to the forecast horizon of the local Be manipulated variable detector 16 or be different from this. FIG. 3 shows - purely by way of example - some possible prognosis horizons of the global manipulated variable determinant 20, in FIG FIG. 3 denoted PH4 and PH5. Minimally (see the forecast horizon PH4), the forecast horizon extends from the beginning of the upstream plant part 2 to the first device 6 of the downstream plant part 3, by means of which the state of the rolling stock 1 can be locally influenced. Maximum (see the forecast horizon PH5), the forecast horizon extends completely from the beginning of the upstream plant part 2 to the end of the downstream part of the plant 3, ie until the expiry of the rolling stock 1 from the downstream part of the plant 3. Even larger forecast horizons are possible. Analogous embodiments of course also apply to the embodiments of the treatment plant according to the FIG. 2 and 4 ,

If the global manipulated variable determinator 20 is present, it is even possible that the input variables of the global manipulated variable determinant 20 also include expected states of sections 14 of the rolling stock 1 that have not yet entered the upstream system part 2. For this purpose, it is only necessary to implement, initialize and start the corresponding local command value determiner 16 in advance for each section 14. If this local manipulated variable determiner 16 continues to determine already expected local manipulated variables for the portion 14 of the rolling stock 1 that has not yet entered the upstream part 2, the input variables of the global manipulated variable determinator 20 also include these expected manipulated variables and the corresponding evaluation variables.

The procedure of FIG. 7 is also according to a treatment plant FIG. 2 applicable. It is also according to a treatment plant FIG. 4 applicable.

As described above, in the determination of the manipulated variables S 'of the global manipulated variable determinants 20 and the manipulated variables S of the local manipulated variable determinants 16, a prognosis is made In addition, it is possible that the control device 20 for at least one of the state Z of the rolling stock 1 influencing devices 6, 15, 18, 21 within a further (second) forecast horizon expected states of the respective device 6, 15, 18, 21 and determines the states of the respective device 6, 15, 18, 21 expected during this prognosis horizon in the determination of the manipulated variables S output by the manipulated variable determinants 16, 20 to the respective device 6, 15, 18, 21 'S' taken into account. This will be described below in connection with the FIG. 8 and 9 explained in more detail. FIG. 8 shows a possible embodiment of FIG. 6 . FIG. 9 a possible embodiment of FIG. 7 ,

According to FIG. 8 additional steps S31 and S32 are inserted between steps S6 and S7. In step S31, the controller 10 determines, for at least one of the devices 6, 15, 18, which are influenced by the local command value determinants 16, their expected states. In step S32, if necessary, the control device 10, taking into account the expected states of the respective device 6, 15, 18, corrects the manipulated variables S output from the local manipulated variable detectors 16 to the devices 6, 15, 18.

The procedure of FIG. 8 is explained in more detail below with reference to a simple example.

It is assumed that a specific cooling device 6 of the cooling section is acted upon in a specific working cycle of the control device 10 by a specific section 14 of the rolling stock 1 with a coolant (for example water). In the next working cycle, the same cooling device 6 acts on the next section 14, in the next but one working cycle on the next but one section 14.

The local manipulated variable determiner 16, which acts on the said cooling device in the specific working cycle, has as relative Control value 80% determined. The next and the next but one local actuating variable determiners 16, which are assigned to the two following sections 14 of the rolling stock 1, have determined as expected correcting variables 50% and 20%. Furthermore, it is assumed that the cooling device 6 following the first-mentioned cooling device 6 should be controlled by the three local manipulated variable detectors just mentioned with 60%, 60% and 40%. Assume further that the cooling means 6 are of the same design and can change their coolant flow from one stroke to the next by a maximum of 25%.

If, under the above assumptions, steps S31 and S32 are not present, only the section 6 passing first through the two coolers 6 is correctly cooled at 80% and 60%. However, the second section can only be cooled by the first cooling device with 55%, because the first cooling device 6, the flow rate of coolant, starting from 80%, can not throttle faster. The error is 5%. The next section is cooled at 30% instead of 20%. The reason is the same: the corresponding cooling device 6 can only throttle the flow of coolant from 55% to 30%.

However, taking into account the states of the cooling devices 6 and in particular their positioning possibilities (minimum and maximum coolant flow, maximum coolant flow change per stroke), it is possible to make an intelligent shift of the coolant flow rate, so that, for example, the first section 14 of the two treated cooling devices 6 with 75% and 65% is cooled, the second section at 50% and 60% and the third section 14 at 25% and 35%. As a result, as a result, it is achieved that the three sections 14 of the rolling stock, as a result of both cooling devices 6, are cooled with the correct amount of coolant. Due to the skillful shifting of the coolant amounts can therefore be an optimization.

In an analogous manner, in the procedure according to FIG. 9 after step S16, steps S41 and S42 may be present. The steps S41 and S42 correspond in content to the steps S31 and S32 of FIG FIG. 8 ,

Alternatively or additionally, there may be steps S43 and S44 inserted after step S23. The steps S43 and S44 can also be described in terms of the steps S31 and S32 of FIG FIG. 8 correspond. The presence of the steps S43 and S44 in addition to the steps S41 and S42 may therefore be particularly useful because the manipulated variables S of the local manipulated variable determinants 16 may have changed due to the step S22.

If appropriate, it may furthermore be useful to follow steps S45 and S46 in step S22. In steps S45 and S46, analogous procedures are taken with respect to the mass flow actuators 21 in steps S31 and S32.

• der Abstand der Stellgrößen S, S' von den Stellgrenzen der vom jeweiligen Stellgrößenermittler 16, 20 angesteuerten Einrichtungen 6, 15, 18, 21 (Minimal- und Maximalwerte);
• die Abweichungen der ausgegebenen und zukünftig erwarteten Stellgrößen S, S' von einem Zwischenwert, der meist etwa in der Mitte zwischen den Stellgrenzen der jeweiligen Einrichtung 6, 15, 18, 21 liegt;
• eventuell, bezogen auf die jeweilige Einrichtung 6, 15, 18, 21, der Abstand der erwarteten Stellgrößenänderungen von der maximal möglichen Änderungsgeschwindigkeit der Stellgrößen S, S';
• insbesondere in dem Fall, dass die Behandlungsanlage einen Ofen aufweist, eine maximal zulässige Temperatur des Walzgutes 1 und der Abstand der tatsächlichen Temperatur T von diesem Wert;
• ein Gesamtenergieverbrauch der Behandlungsanlage.

As already mentioned, the manipulated variable determinants 16, 20 determine their respective manipulated variables S, S 'as a rule by optimizing a respective target function. In addition to the deviation of the predicted state from a corresponding desired state, one or more of the following variables can preferably enter into the objective function:

• the distance of the manipulated variables S, S 'from the setting limits of the devices 6, 15, 18, 21 (minimum and maximum values) controlled by the respective manipulated variable determinants 16, 20;
• the deviations of the output and future expected manipulated variables S, S 'from an intermediate value, which is usually approximately in the middle between the setting limits of the respective device 6, 15, 18, 21;
• possibly, based on the respective device 6, 15, 18, 21, the distance of the expected manipulated variable changes from the maximum possible rate of change of the manipulated variables S, S ';
• in particular in the case that the treatment plant comprises a furnace, a maximum allowable temperature of the rolling stock 1 and the distance of the actual temperature T from this value;
• a total energy consumption of the treatment plant.

• je weiter die ausgegebenen und zukünftigen Stellgrößen S, S' von den Stellgrenzen der jeweils angesteuerten Einrichtungen 6, 15, 18, 21 entfernt sind,
• je näher die Abweichungen der ausgegebenen und zukünftig erwarteten Stellgrößen S, S' an den Zwischenwerten liegen und/oder
• je weiter die angeforderten Änderungsgeschwindigkeiten von den maximal möglichen Änderungsgeschwindigkeiten der ausgegebenen und zukünftigen Stellgrößen S, S' entfernt sind.

The objective function is (of course) solved the better, the lower the deviation of the expected within the forecast horizon PH1 to PH5 state and / or expected at the end of the forecast horizon PH1 to PH5 state of corresponding target states. If one or more of the other variables mentioned above are taken into account, the objective function is better solved,

• the farther the output and future manipulated variables S, S 'are removed from the setting limits of the respectively controlled devices 6, 15, 18, 21,
• the closer the deviations of the output and future expected manipulated variables S, S 'lie at the intermediate values and / or
• the further the requested rates of change are removed from the maximum possible rates of change of the output and future manipulated variables S, S '.

Alternatively or additionally-preferably as an alternative-for taking account of the setting limits and the maximum possible rates of change of the manipulated variables S, S ', it is possible to set up corresponding equation and inequation secondary conditions in addition to the objective function. In this case, the constraints are taken into account when optimizing (= maximizing or minimizing) the objective function. For example, in the optimization of the objective function as a secondary condition to be considered, it can be established that the cooling by the cooling devices 6, 15 can not be negative and can not exceed a certain (plant-specific, possibly even dynamic) maximum value. The mentioned SQP method is capable of taking into account such constraints.

The control device 10, which implements the control method according to the invention, must have a high computing power. It may be possible to use this computing power according to the representation of FIG. 10 in a single, unified, not divided into several sub-control devices to realize control device 10, which controls the entire treatment plant. Alternatively, it is according to the representation of FIG. 11 possible that the control device 10 is divided into a plurality of sub-control devices 22. However, if such a division is made, each implemented local manipulated variable determiner 16 is preferably implemented on one and the same subcontroller 22 during the entire passage of the respective section 14 of the rolling stock 1 through the treatment plant. It is therefore preferably not the case that the respective local manipulated variable determiner 16, for example, from the in FIG. 11 left illustrated sub-controller 22 to the in FIG. 11 Partial control device 22 shown on the right is transmitted when - for example - the corresponding portion 14 of the rolling stock 1 from the upstream part of the plant 2 in the downstream part of the plant 3 passes.

The above-explained procedures are analogous to the embodiments of the treatment plant according to the 4 and 5 applicable. The only significant difference is that the sections 14 of the rolling stock 1 are not cooled by means of the heaters 18 of the furnace, but are heated.

The present invention has many advantages. In particular, an inter-plant forecast is realized for the first time. For in the prior art, a model prediction and, associated with it, a prognosis are already being used. The forecasts are made in the prior art, however, always limited to the respective part of the plant 2, 3.

Furthermore, it is particularly in the embodiment of the treatment plant according to the 4 and 5 possible to use the oven as upstream unit part 2 to use to set the final rolling temperature at the outlet of the finishing train as a subordinate part of the plant 3. Only the forecast horizon has to be chosen sufficiently large.

This refinement is of decisive importance, in particular, if no intermediate stand cooling devices 15 are present in the finishing train and, on the other hand, the input speed v at which the rolling stock 1 enters the finishing train is determined for technological reasons. For then there are no actuators available within the finishing train, by means of which the Endwalztemperatur can be set at the exit of the finishing train. By virtue of the procedure according to the invention, however, the furnace (= upstream plant part 2) can be used to set the final rolling temperature (not the inlet temperature at the inlet of the finishing train) accordingly.

The input speed v, with which the rolling stock 1 enters the finishing train, may be determined, for example, because the finishing mill, as shown in FIG FIG. 5 on the one hand as a further upstream device 7 the roughing and this in turn the continuous casting 8 are arranged upstream. For a casting speed of the continuous casting 8 is essentially determined by the solidification behavior of the cast metal and adjustable only within very narrow limits. The input speed v of the rolling stock 1 is determined in this case by the more or less fixed predetermined casting speed and the cross-sectional decrease of the rolling stock 1 in the roughing train.

The above description is only for explanation of the present invention. The scope of the present invention, however, is intended to be determined solely by the appended claims.

Claims (15)

1. Control method for a processing line for an extended rolling stock (1), in particular a ribbon-like rolling stock (1),

   - whereby the processing line features at least one upstream system component (2) and one downstream system component (3), directly sequentially run through by the rolling stock (1),

   - whereby the upstream or downstream system component (2, 3) is implemented as a production line through which the rolling stock (1) is rolled in a fashion so as to reduce the cross-section, and the other system component (3, 2) is implemented as a system component which differs from the production line,

   - whereby a control device (10) for the processing line has at least one final size provided for segments (14) of the rolling stock (1) running through the processing line

   - whereby the said final size is derived from a desired final status (Z*) in each case, which is to comprise the respective segment (14) of the rolling stock (1) after passing through the downstream system component (3)
   characterised in that
   the control device (10) implements at least one setting parameter determinant (16, 20)

   - whereby the setting parameter determinant (16, 20) issues a setting parameter (S, S') to at least one facility (6, 15, 18, 21) affecting the status (Z) of at least one of the segments (14) of the rolling stock (1) passing through the processing line,

   - whereby the setting parameter determinant (16, 20) issues the setting parameter (S, S') at a point in time, at which at least one segment (14) is located in the upstream system component (2),

   - whereby the setting parameter determinant (16, 20) takes into account model-supported determined expected statuses of the at least one segment (14) of the rolling stock (1) when determining the setting parameter (S, S'), which lie within an initial overall forecast (PH1 to PH5) of the respective setting parameter determinant (16, 20)

   - whereby the first overall forecast (PH1 to PH5) is defined in such a way that the setting parameter determinant (16, 20) takes into account at least one status forecast for at least one segment (14) of the rolling stock (1) when determining the setting parameters issued by it (S, S'), which is expected for at least one segment (14) of the rolling stock (1) in the downstream system component (3).
2. Control method according to claim 1,
   characterised in that

   - the control device (10) implements respectively a setting parameter determinant (16) for each segment (14) of the rolling stock (1), which remains coupled to the respective segment (14) of the rolling stock (1) during the whole passage of the respective segment (14) of the rolling stock (1) through the processing line as local setting parameter determinant (16), and

   - the respective local setting parameter determinant (16) then issues a setting parameter (S) to a facility (6, 15,18) locally affecting the status (Z) of the rolling stock (1) passing through the processing line, if the respective facility (6, 15,18) affects the respective segment (14) of the rolling stock (1).
3. Control method according to claim 2, characterised in that at least one of the facilities (15, 18) locally affecting the status (Z) of the rolling stock (1) passing through the processing line is arranged in the upstream system component (2).
4. Control method according to claim 2 or 3, characterised in that the control device (10) is configured as a single control device (10) which is not split into several sub control devices and which controls the whole processing line, or that the control device (10) is actually split into several sub control devices (22), the respective setting parameter determinant (16) however is implemented on one and the same sub control device (22) during the whole passage of the respective segment (14) of the rolling stock (1) through the processing line.
5. Control method according to one of the above claims, characterised in that the control device (10) implements for all segments (14) of the rolling stock (1) a setting parameter determinant (20), which acts as a global setting parameter determinant (20) on the mass flow of the rolling stock (1).
6. Control method according to claim 5 and one of the claims 2, 3 and 4, characterised in that

   - the setting parameters (S) defined by the local setting parameter determinants (16) according to the manner described above are firstly provisional setting parameters (S), whereby the local setting parameter determinants (16) determine the provisional setting parameters (S) under the assumption that a currently given mass flow process is not changed,

   - that the global setting parameter determinant (20) determines a new mass flow process based on entry parameters,

   - that the entry parameters include at least the provisional setting parameters (S) defined by the local setting parameter determinants (16) as well as at least one evaluation parameter for the provisional setting parameters (S), whereby the evaluation parameter is a minimum possible setting parameter, a maximum possible setting parameter, a maximum possible setting parameter change or an intermediate value, which lies between the minimum possible setting parameter and the maximum possible setting parameter, and

   - that the local setting parameter determinant (16) determines their final setting parameters (S) based on the provisional setting parameters (S), the currently given mass flow process and the new mass flow process.
7. Control method according to claim 6, characterised in that the entry parameters also include expected statuses of at least one segment (14) of the rolling stock (1), which has still not entered the upstream system component (2), and/or for this segment (14) of the rolling stock (1) expected provisional setting parameters defined by a corresponding local setting parameter determinant (16) as well as the respective corresponding evaluation parameter.
8. Control method according to the above claims,
   characterised in that

   - the at least one setting parameter determinant (16, 20) at several points in time issues a setting parameter (S, S') in each instance to the facility (6, 15, 18, 21) affecting the status (Z) of at least one of the segments (14) of the rolling stock (1) passing through the processing line,

   - the temporary distance of one and a second point in time is smaller than the first overall forecast (PH1 to PH5),

   - at least one setting parameter determinant (16, 20) determines an expected setting parameter for the second of the points in time when determining the setting parameter (S, S') output at the first point in time, and

   - the at least one setting parameter determinant (16, 20) takes into account the setting parameters for the second of the points in time when determining the forecast statuses lying temporarily after the second of the points in time, but still within the first overall forecast (PH1 to PH5).
9. Control method according to claim 8 characterised in that the at least one setting parameter determinant (16, 20) is configured as a model predictive controller.
10. Control method according to one of the above claims, characterised in that the first overall forecast (PH1 to PH5) is defined in such a way that it extends at least from the first influence on the status (Z) of the rolling stock (1) in the upstream system component (2) to the exit of the rolling stock (1) from the downstream system component (3).
11. Control method according to one of the above claims, characterised in that the control device (10) determines expected statuses of the respective facility (6, 15, 18, 21) for at least one of the facilities (6, 15, 18, 21) affecting the status (Z) of the rolling stock (1) within a second overall forecast, and that the control device (10) takes into account the statuses of the respective facilities (6, 15, 18, 21) expected during the second overall forecast when determining the setting parameters (S, S') given to the respective facility (6, 15, 18, 21) by the setting parameter determinants (16, 20).
12. Control method according to one of the above claims, characterised in that the setting parameter determinant (16, 20) defines the setting parameter (S, S') through optimisation of a target function, whereby the energy consumption of the processing line is entered in the target function in addition to the deviation of a forecast status of at least one segment (14) of the rolling stock (1) from a corresponding target status.
13. Computer program, which features the machine code (12), which can be processed directly by a control device (10) for a processing line for a rolling stock (1), in particular a ribbon-like rolling stock (1) and the execution of which through the control device (10) acts such that the control device (10) carries out a control method with all the steps of a control method according to one of the above claims.
14. Computer program according to claim 13, characterised in that it is saved on a data storage device (13) in machine readable form.
15. Control device for a processing line for a rolling stock (1), in particular a ribbon-like rolling stock (1), characterised in that it is embodied in such a way that during operation it carries out a control method with all the steps of a control method according to one of claims 1 to 12.

Images