CN114458439A - Supercharger control method and device, computer readable storage medium and supercharger - Google Patents
Supercharger control method and device, computer readable storage medium and supercharger Download PDFInfo
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- CN114458439A CN114458439A CN202210381619.6A CN202210381619A CN114458439A CN 114458439 A CN114458439 A CN 114458439A CN 202210381619 A CN202210381619 A CN 202210381619A CN 114458439 A CN114458439 A CN 114458439A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The application provides a control method and device of a supercharger, a computer readable storage medium and the supercharger, wherein the supercharger comprises a deflation valve, and the method comprises the following steps: acquiring a feedforward duty ratio of a current scheduling period currently used for controlling the opening of the bleed valve; based on a self-learning mechanism, correcting the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period; acquiring a closed-loop adjustment duty ratio of a current scheduling period currently used for controlling the opening of the air bleeding valve; and determining the final boost control duty ratio of the current scheduling period according to the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period, so that the deviation caused by the factors such as performance degradation of the supercharger, altitude change and the like can be complemented, the time for outputting the closed-loop adjustment duty ratio of the current scheduling period by the PID controller is further reduced, and the problem of poor stability of boost pressure control in the prior art is solved.
Description
Technical Field
The application relates to the technical field of superchargers, in particular to a control method and device of a supercharger, a computer readable storage medium and the supercharger.
Background
The control index of the supercharger control is the supercharging pressure, the PID module outputs a closed-loop adjustment duty ratio, and the closed-loop control of the supercharger on the supercharging pressure is realized by adding the feedforward duty ratio and the closed-loop adjustment duty ratio.
The feedforward duty ratio in the existing scheme is a fixed value, and the factors such as performance degradation and altitude change of a supercharger cannot be considered, so that the larger difference between the supercharging capacity and a set value is caused under the same feedforward duty ratio opening; at the moment, the deviation of the final ideal duty ratio and the feedforward duty ratio is large, and the deviation is different under different working conditions. At this time, the range of the closed-loop adjustment required by the PID module is enlarged, that is, the range of the closed-loop adjustment duty ratio required to be output by the PID module is enlarged, which further causes problems that the control of the boost pressure is difficult to be stabilized, the stabilization time is prolonged, and the like.
Disclosure of Invention
The present application mainly aims to provide a method and an apparatus for controlling a supercharger, a computer-readable storage medium, and a supercharger, so as to solve the problem of poor stability of the control of the boost pressure in the prior art.
In order to achieve the above object, according to one aspect of the present application, there is provided a control method of a supercharger including a purge valve, the method including: acquiring a feedforward duty ratio of a current scheduling period currently used for controlling the opening of the bleed valve; based on a self-learning mechanism, correcting the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period; acquiring a closed-loop adjustment duty ratio of the current scheduling period currently used for controlling the opening of the deflation valve; and determining the final pressurization control duty ratio of the current dispatching cycle according to the corrected feedforward duty ratio of the current dispatching cycle and the closed-loop adjustment duty ratio of the current dispatching cycle, and controlling the opening of a deflation valve of the supercharger by adopting the final pressurization control duty ratio of the current dispatching cycle.
Further, based on a self-learning mechanism, correcting the feedforward duty cycle of the current scheduling period, and obtaining the corrected feedforward duty cycle of the current scheduling period includes: acquiring a final boost control duty ratio of a previous scheduling period and a feedforward duty ratio of the previous scheduling period; determining a correction value of the feedforward duty ratio of the current scheduling period according to the final boost control duty ratio of the previous scheduling period and the feedforward duty ratio of the previous scheduling period; and correcting the feedforward duty ratio of the current scheduling period by adopting the correction value of the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period.
Further, obtaining a correction value of the feedforward duty ratio of the current scheduling period according to the final boost control duty ratio of the previous scheduling period and the feedforward duty ratio of the previous scheduling period includes: acquiring a first difference value, wherein the first difference value is a difference value between the final boost control duty ratio of the previous scheduling period and the feedforward duty ratio of the previous scheduling period; and multiplying the first difference value by a self-learning step length to obtain a correction value of the feedforward duty ratio of the current scheduling period.
Further, determining the final boost control duty cycle of the current scheduling period according to the modified feedforward duty cycle of the current scheduling period and the closed-loop adjustment duty cycle of the current scheduling period includes: and summing the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period to obtain the final pressurization control duty ratio of the current scheduling period.
Further, obtaining the feedforward duty ratio of the current scheduling period currently used for controlling the opening degree of the bleed valve includes: acquiring a rotating speed value of a current scheduling period and a set supercharging pressure value of the current scheduling period; constructing a two-dimensional table, wherein the two-dimensional table comprises a rotating speed value of the current scheduling period and a set supercharging pressure value of the current scheduling period; and determining the feedforward duty ratio of the current scheduling period according to the two-dimensional table.
Further, obtaining the closed-loop adjustment duty ratio of the current scheduling period currently used for controlling the opening degree of the purge valve comprises: acquiring an actually measured supercharging pressure value of the current scheduling period; acquiring a second difference value, wherein the second difference value is the difference value between the actually measured supercharging pressure value of the current scheduling period and the set supercharging pressure value of the current scheduling period; and processing the second difference value through a PID controller to obtain the closed-loop adjustment duty ratio of the current scheduling period.
Further, according to the two-dimensional table, determining the feed-forward duty cycle of the current scheduling period includes: determining a point corresponding to the rotating speed value of the current scheduling period and the set supercharging pressure value of the current scheduling period in the two-dimensional table; and determining the feedforward duty ratio of the current scheduling period according to the rotating speed value of the current scheduling period and the point corresponding to the set supercharging pressure value of the current scheduling period.
Further, according to the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period, the final boost control duty ratio of the current scheduling period is determined, and after the final boost control duty ratio of the current scheduling period is adopted to control the opening degree of a deflation valve of the supercharger, the method further comprises the following steps: and updating the two-dimensional table by adopting the final pressurization control duty ratio of the current scheduling period.
According to another aspect of the present application, there is provided a control apparatus of a supercharger, the apparatus including a first acquisition unit, a correction unit, a second acquisition unit, and a determination unit; the first acquisition unit is used for acquiring the feedforward duty ratio of the current scheduling period currently used for controlling the opening of the deflation valve; the correction unit is used for correcting the feedforward duty ratio of the current scheduling period based on a self-learning mechanism to obtain the corrected feedforward duty ratio of the current scheduling period; the second obtaining unit is used for obtaining the closed-loop adjustment duty ratio of the current scheduling period currently used for controlling the opening degree of the deflation valve; the determining unit is used for determining the final pressurization control duty ratio of the current dispatching cycle according to the corrected feedforward duty ratio of the current dispatching cycle and the closed-loop adjustment duty ratio of the current dispatching cycle, and controlling the opening of a deflation valve of the supercharger by adopting the final pressurization control duty ratio of the current dispatching cycle.
According to another aspect of the present application, there is also provided a computer-readable storage medium, which includes a stored program, wherein when the program runs, the apparatus on which the computer-readable storage medium is located is controlled to execute any one of the above methods.
According to another aspect of the present application, there is also provided a supercharger comprising a control unit for performing any of the methods described above.
By applying the technical scheme of the application, the aim of correcting the feedforward duty ratio of the current scheduling period is fulfilled through a self-learning mechanism, thereby obtaining the corrected feedforward duty ratio of the current scheduling period, the corrected feedforward duty ratio of the current scheduling period can adapt to various changed environmental factors, can complement the deviation caused by the performance degradation of the supercharger, the altitude change and other factors, thereby reducing the size range of the closed-loop adjustment duty ratio of the current scheduling period, and the time of the PID controller outputting the closed-loop adjustment duty ratio of the current scheduling period is further reduced, the problem of poor stability of the control of the boost pressure in the prior art is solved, the stability and the adaptability of the supercharger are effectively improved, the problem of poor environmental adaptability caused by single feedforward control in the original control logic is solved, and the environmental adaptability and the robustness of a supercharger control unit are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 shows a flowchart of a control method of a supercharger of an embodiment of the present application;
fig. 2 shows a schematic diagram of a control device of a supercharger of an embodiment of the present application;
FIG. 3 is a diagram illustrating a feed-forward duty cycle of the current scheduling period after being modified according to an embodiment of the present application;
FIG. 4 is a diagram illustrating a self-learning mechanism enabling condition according to an embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As introduced in the background art, the feedforward duty ratio in the prior art is a fixed value, and cannot consider factors such as performance degradation and altitude change of the supercharger, so that a large difference occurs between the supercharging capacity and a set value under the same feedforward duty ratio opening, and further a range of a closed-loop adjustment duty ratio required to be output by the PID module is enlarged, thereby causing problems of difficulty in stabilizing control of the supercharging pressure, prolonged stabilization time and the like.
According to an embodiment of the present application, a control method of a supercharger is provided.
Fig. 1 is a flowchart of a control method of a supercharger according to an embodiment of the present application. As shown in fig. 1, the supercharger comprises a purge valve, and the method comprises the following steps:
step S101, acquiring a feedforward duty ratio of a current scheduling period currently used for controlling the opening of a deflation valve;
step S102, based on a self-learning mechanism, correcting the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period;
step S103, acquiring the closed-loop adjustment duty ratio of the current scheduling period currently used for controlling the opening of the air bleeding valve;
and step S104, determining the final pressurization control duty ratio of the current scheduling period according to the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period, and controlling the opening of a deflation valve of the supercharger by adopting the final pressurization control duty ratio of the current scheduling period.
The step is realized by a self-learning mechanism to correct the feedforward duty ratio of the current scheduling period, thereby obtaining the corrected feedforward duty ratio of the current scheduling period, the corrected feedforward duty ratio of the current scheduling period can adapt to various changed environmental factors, can complement the deviation caused by the performance degradation of the supercharger, the altitude change and other factors, thereby reducing the size range of the closed-loop adjustment duty ratio of the current scheduling period, and the time of the PID controller outputting the closed-loop adjustment duty ratio of the current scheduling period is further reduced, the problem of poor stability of the control of the boost pressure in the prior art is solved, the stability and the adaptability of the supercharger are effectively improved, the problem of poor environmental adaptability caused by single feedforward control in the original control logic is solved, and the environmental adaptability and the robustness of a supercharger control unit are improved.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
In an embodiment of the present application, the correcting the feedforward duty ratio of the current scheduling period based on a self-learning mechanism to obtain the corrected feedforward duty ratio of the current scheduling period includes: acquiring a final boost control duty ratio of a previous scheduling period and a feedforward duty ratio of the previous scheduling period; determining a correction value of the feedforward duty ratio of the current scheduling period according to the final boosting control duty ratio of the previous scheduling period and the feedforward duty ratio of the previous scheduling period; correcting the feedforward duty ratio of the current scheduling period by adopting the correction value of the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period; and determining the correction value of the feedforward duty ratio of the current scheduling period according to the final boost control duty ratio of the previous scheduling period and the feedforward duty ratio of the previous scheduling period, so that the correction value of the feedforward duty ratio of the current scheduling period is adopted to correct the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period, and the corrected feedforward duty ratio of the current scheduling period can adapt to various slowly-changing environmental factors.
In an embodiment of the application, obtaining the correction value of the feedforward duty ratio of the current scheduling period according to the final boost control duty ratio of the previous scheduling period and the feedforward duty ratio of the previous scheduling period includes: acquiring a first difference value, wherein the first difference value is the difference value between the final boost control duty ratio of the previous scheduling period and the feedforward duty ratio of the previous scheduling period; multiplying the first difference value by a self-learning step length to obtain a correction value of the feedforward duty ratio of the current scheduling period; the range of the self-learning step length is 0.1-0.3, and the change range of the feedforward duty ratio of the current scheduling period after correction obtained subsequently is ensured to be kept stable.
In an embodiment of the present application, determining the final boost control duty cycle of the current scheduling period according to the modified feedforward duty cycle of the current scheduling period and the closed-loop adjustment duty cycle of the current scheduling period includes: and summing the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period to obtain the final pressurization control duty ratio of the current scheduling period, and achieving the purpose of determining the final pressurization control duty ratio of the current scheduling period by summing the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period.
In one embodiment of the present application, obtaining the feed-forward duty cycle of the current scheduling period currently used to control the opening of the bleed valve comprises: acquiring a rotating speed value of a current scheduling period and a set supercharging pressure value of the current scheduling period; constructing a two-dimensional table, wherein the two-dimensional table comprises a rotating speed value of the current scheduling period and a set supercharging pressure value of the current scheduling period; and determining the feedforward duty ratio of the current scheduling period according to the two-dimensional table, and determining the feedforward duty ratio of the current scheduling period through the two-dimensional table to ensure that subsequent calculation can be stably performed.
Specifically, the two-dimensional table is as follows:
in the two-dimensional table, the X-axis (first row) represents the rotation speed, the Y-axis (leftmost column) represents the set boost pressure, and the other points are the feed-forward duty. The feedforward duty cycle is determined, for example, if the speed value is 1500 and the boost pressure is 200, the value at the intersection of the rows and columns in the table (45 in the table above) is the feedforward duty cycle.
On the one hand, the two-dimensional table is used for obtaining the feedforward duty ratio, and on the other hand, after the feedforward duty ratio is modified, the modified value is used for updating the original value for the next use, for example, 45 is used above, and 46 is used after modification, so that the value of the point in the two-dimensional table needs to be changed from 45 to 46, that is, the two-dimensional table is updated correspondingly.
In an embodiment of the application, obtaining the closed-loop adjustment duty ratio of the current scheduling period currently used for controlling the opening of the bleed valve includes: acquiring an actually measured supercharging pressure value of the current scheduling period; acquiring a second difference value, wherein the second difference value is the difference value between the actually measured supercharging pressure value of the current scheduling period and the set supercharging pressure value of the current scheduling period; processing the second difference value through a PID controller to obtain the closed-loop adjustment duty ratio of the current scheduling period; the purpose that the PID controller outputs the closed-loop adjustment duty ratio of the current scheduling period is achieved.
In an embodiment of the application, determining the feed-forward duty cycle of the current scheduling period according to the two-dimensional table includes: determining a point corresponding to the rotating speed value of the current dispatching cycle and the set supercharging pressure value of the current dispatching cycle in the two-dimensional table; and determining the feedforward duty ratio of the current scheduling period according to the rotating speed value of the current scheduling period and the point corresponding to the set supercharging pressure value of the current scheduling period, and determining the feedforward duty ratio of the current scheduling period through the two-dimensional table to ensure that the subsequent calculation can be stably carried out.
In an embodiment of the present application, after determining a final boost control duty ratio of the current scheduling period according to the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period, and controlling an opening of a purge valve of a supercharger by using the final boost control duty ratio of the current scheduling period, the method further includes: updating the two-dimensional table by adopting the final pressurization control duty ratio of the current scheduling period; the purpose of continuously optimizing the two-dimensional table is achieved.
The embodiment of the present application further provides a control device of a supercharger, and it should be noted that the control device of the supercharger according to the embodiment of the present application may be used to execute the control method for the supercharger provided in the embodiment of the present application. The following describes a control device for a supercharger according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a control apparatus of a supercharger according to an embodiment of the present application. As shown in fig. 2, the apparatus includes: a first acquisition unit 10, a correction unit 20, a second acquisition unit 30, and a determination unit 40;
the first obtaining unit 10 is configured to obtain a feedforward duty ratio of a current scheduling period currently used for controlling an opening of the bleed valve;
the correcting unit 20 is configured to correct the feedforward duty ratio of the current scheduling period based on a self-learning mechanism, so as to obtain a corrected feedforward duty ratio of the current scheduling period;
the second obtaining unit 30 is configured to obtain a closed-loop adjustment duty ratio of the current scheduling period currently used for controlling the opening of the bleed valve;
the determining unit 40 is configured to determine a final boost control duty ratio of the current scheduling period according to the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period, and control the opening of the purge valve of the supercharger by using the final boost control duty ratio of the current scheduling period.
The device achieves the purpose of correcting the feedforward duty ratio of the current scheduling period through the self-learning mechanism of the correction unit, thereby obtaining the corrected feedforward duty ratio of the current scheduling period, the corrected feedforward duty ratio of the current scheduling period can adapt to various changed environmental factors, can complement the deviation caused by the performance degradation of the supercharger, the altitude change and other factors, thereby reducing the size range of the closed-loop adjustment duty ratio of the current scheduling period, and the time of the PID controller outputting the closed-loop adjustment duty ratio of the current scheduling period is further reduced, the problem of poor stability of control of the boost pressure in the prior art is solved, the stability and the adaptability of the supercharger are effectively improved, the problem of poor environmental adaptability caused by single feedforward control in the original control logic is solved, and the environmental adaptability and the robustness of a supercharger control unit are improved.
In an embodiment of the present application, the modification unit includes a first obtaining module, a first determining module, and a modifying module; the first obtaining module is used for obtaining the final boost control duty ratio of the previous dispatching cycle and the feedforward duty ratio of the previous dispatching cycle; the first determining module is configured to determine a correction value of the feedforward duty ratio of the current scheduling period according to the final boost control duty ratio of the previous scheduling period and the feedforward duty ratio of the previous scheduling period; the correction module is used for correcting the feedforward duty ratio of the current scheduling period by adopting the correction value of the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period; and determining the correction value of the feedforward duty ratio of the current scheduling period by a first determination module according to the final boost control duty ratio of the previous scheduling period and the feedforward duty ratio of the previous scheduling period, so that the correction module corrects the feedforward duty ratio of the current scheduling period by using the correction value of the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period, and the corrected feedforward duty ratio of the current scheduling period can adapt to various slowly-changing environmental factors.
In an embodiment of the application, the first determining module includes an obtaining submodule and a calculating submodule, where the obtaining submodule is configured to obtain a first difference value, where the first difference value is a difference value between a final boost control duty ratio of the previous scheduling period and a feed-forward duty ratio of the previous scheduling period; the calculation submodule is used for multiplying the first difference value by a self-learning step length to obtain a correction value of the feedforward duty ratio of the current scheduling period; the range of the self-learning step length is 0.1-0.3, and the change range of the feedforward duty ratio of the current scheduling period after correction obtained subsequently is ensured to be kept stable.
In an embodiment of the application, the determining unit includes a calculating module, and the calculating module is configured to sum the modified feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period to obtain a final boost control duty ratio of the current scheduling period, and sum the modified feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period to achieve a purpose of determining the final boost control duty ratio of the current scheduling period.
In an embodiment of the present application, the first obtaining unit includes a second obtaining module, a constructing module, and a second determining module, where the second obtaining module is configured to obtain a rotation speed value of a current scheduling period and a set boost pressure value of the current scheduling period; the building module is used for building a two-dimensional table, and the two-dimensional table comprises a rotating speed value of the current scheduling period and a set supercharging pressure value of the current scheduling period; the second determining module is configured to determine the feedforward duty cycle of the current scheduling period according to the two-dimensional table, and the feedforward duty cycle of the current scheduling period is determined through the two-dimensional table, so that it is ensured that subsequent calculation can be performed stably.
In an embodiment of the present application, the second obtaining unit further includes a third obtaining module, a fourth obtaining module, and a processing module, where the third obtaining module is configured to obtain an actually measured boost pressure value of the current scheduling period; the fourth obtaining module is configured to obtain a second difference value, where the second difference value is a difference value between an actually measured boost pressure value of the current scheduling period and a set boost pressure value of the current scheduling period; the processing module is used for processing the second difference value through a PID controller to obtain the closed-loop adjustment duty ratio of the current scheduling period; the purpose that the PID controller outputs the closed-loop adjustment duty ratio of the current scheduling period is achieved.
In an embodiment of the application, the second determining module includes a first determining submodule and a second determining submodule, and the first determining submodule is configured to determine a point in the two-dimensional table, where the point corresponds to a rotation speed value of the current scheduling period and a set boost pressure value of the current scheduling period; the second determining submodule is used for determining the feedforward duty ratio of the current scheduling period according to the rotating speed value of the current scheduling period and the point corresponding to the set supercharging pressure value of the current scheduling period, and the feedforward duty ratio of the current scheduling period can be determined through the two-dimensional table, so that the follow-up calculation can be stably carried out.
In an embodiment of the present application, the apparatus further includes an updating unit, where the updating unit is configured to determine a final boost control duty ratio of the current scheduling period according to the modified feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period, and after controlling an opening degree of a purge valve of a supercharger by using the final boost control duty ratio of the current scheduling period, update the two-dimensional table by using the final boost control duty ratio of the current scheduling period; the purpose of continuously optimizing the two-dimensional table is achieved.
The control device of the supercharger comprises a processor and a memory, wherein the first acquiring unit, the correcting unit, the second acquiring unit, the determining unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more than one, and the problem of poor stability of control of the boost pressure in the prior art is solved by adjusting the kernel parameters.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
The embodiment of the invention provides a computer-readable storage medium, which comprises a stored program, wherein when the program runs, a device where the computer-readable storage medium is located is controlled to execute the control method of the supercharger.
The supercharger comprises a control unit, and the control unit is used for executing the control method of the supercharger.
The embodiment of the invention provides a processor, which is used for running a program, wherein the program executes the control method of the supercharger when running.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein when the processor executes the program, at least the following steps are realized: acquiring a feedforward duty ratio of a current scheduling period currently used for controlling the opening of the bleed valve; based on a self-learning mechanism, correcting the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period; acquiring a closed-loop adjustment duty ratio of the current scheduling period currently used for controlling the opening of the air bleed valve; and determining the final pressurization control duty ratio of the current scheduling period according to the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period, and controlling the opening of a deflation valve of the supercharger by adopting the final pressurization control duty ratio of the current scheduling period. The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The present application further provides a computer program product adapted to perform a program of initializing at least the following method steps when executed on a data processing device: acquiring a feedforward duty ratio of a current scheduling period currently used for controlling the opening of the air bleed valve; based on a self-learning mechanism, correcting the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period; acquiring a closed-loop adjustment duty ratio of the current scheduling period currently used for controlling the opening of the air bleed valve; and determining the final pressurization control duty ratio of the current scheduling period according to the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period, and controlling the opening of a deflation valve of the supercharger by adopting the final pressurization control duty ratio of the current scheduling period.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
Example (b):
the present embodiment relates to a control scheme of a supercharger, and fig. 3 is a schematic diagram of a feed-forward duty ratio of the current scheduling period after being modified according to an embodiment of the present application, as shown in fig. 3, the scheme includes the following steps:
step 1: acquiring a rotating speed value of a current scheduling period and a set supercharging pressure value of the current scheduling period; constructing a two-dimensional table, wherein the two-dimensional table comprises a rotating speed value of the current scheduling period and a set supercharging pressure value of the current scheduling period; determining a point corresponding to the rotating speed value of the current dispatching cycle and the set supercharging pressure value of the current dispatching cycle in the two-dimensional table; determining the feedforward duty ratio of the current scheduling period according to the rotating speed value of the current scheduling period and the point corresponding to the set supercharging pressure value of the current scheduling period;
and 2, step: based on a self-learning mechanism, acquiring a final boost control duty ratio of a previous scheduling period and a feedforward duty ratio of the previous scheduling period; acquiring a first difference value, wherein the first difference value is the difference value between the final boost control duty ratio of the previous scheduling period and the feedforward duty ratio of the previous scheduling period; multiplying the first difference value by a self-learning step length to obtain a correction value of the feedforward duty ratio of the current scheduling period; correcting the feedforward duty ratio of the current scheduling period by adopting the correction value of the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period;
FIG. 4 is a schematic diagram of self-learning mechanism enabling conditions according to an embodiment of the present application, as shown in FIG. 4, the self-learning mechanism enabling conditions include:
1. the final supercharging control duty ratio fluctuation of the current scheduling period is small;
2. the rotating speed of the current scheduling period is stable;
3. the actually measured boost pressure of the current scheduling period is controlled stably;
4. the rotating speed of the current scheduling period is higher than the lower limit of the set rotating speed range;
5. the actually measured boost pressure of the current scheduling period is higher than the set boost pressure lower limit;
and step 3: acquiring an actually measured supercharging pressure value of the current scheduling period; acquiring a second difference value, wherein the second difference value is the difference value between the actually measured supercharging pressure value of the current scheduling period and the set supercharging pressure value of the current scheduling period; processing the second difference value through a PID controller to obtain the closed-loop adjustment duty ratio of the current scheduling period;
and 4, step 4: and summing the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period to obtain the final pressurization control duty ratio of the current scheduling period.
And 5: and updating the two-dimensional table by adopting the final pressurization control duty ratio of the current scheduling period.
In the above steps, the purpose of correcting the feedforward duty ratio of the current scheduling period is achieved through a self-learning mechanism, thereby obtaining the corrected feedforward duty ratio of the current scheduling period, the corrected feedforward duty ratio of the current scheduling period can adapt to various changed environmental factors, can complement the deviation caused by the performance degradation of the supercharger, the altitude change and other factors, thereby reducing the size range of the closed-loop adjustment duty ratio of the current scheduling period, and the time of the PID controller outputting the closed-loop adjustment duty ratio of the current scheduling period is further reduced, the problem of poor stability of the control of the boost pressure in the prior art is solved, the stability and the adaptability of the supercharger are effectively improved, the problem of poor environmental adaptability caused by single feedforward control in the original control logic is solved, and the environmental adaptability and the robustness of a supercharger control unit are improved.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) the control method of the supercharger achieves the aim of correcting the feedforward duty ratio of the current scheduling period through a self-learning mechanism, thereby obtaining the corrected feedforward duty ratio of the current scheduling period, the corrected feedforward duty ratio of the current scheduling period can adapt to various changed environmental factors, can complement the deviation caused by the performance degradation of the supercharger, the altitude change and other factors, thereby reducing the size range of the closed-loop adjustment duty ratio of the current scheduling period, and the time of the PID controller outputting the closed-loop adjustment duty ratio of the current scheduling period is further reduced, the problem of poor stability of the control of the boost pressure in the prior art is solved, the stability and the adaptability of the supercharger are effectively improved, the problem of poor environmental adaptability caused by single feedforward control in the original control logic is solved, and the environmental adaptability and the robustness of a supercharger control unit are improved.
2) The control device of the supercharger achieves the purpose of correcting the feedforward duty ratio of the current scheduling period through the self-learning mechanism of the correction unit, thereby obtaining the corrected feedforward duty ratio of the current scheduling period, the corrected feedforward duty ratio of the current scheduling period can adapt to various environment factors, and the deviation caused by the factors such as the performance degradation and altitude change of the supercharger can be complemented, thereby reducing the size range of the closed-loop adjustment duty ratio of the current scheduling period, further reducing the time of outputting the closed-loop adjustment duty ratio of the current scheduling period by the PID controller, solving the problem of poor stability of the control of the boost pressure in the prior art, effectively improving the stability and adaptability of the supercharger, and solving the problem of poor environment adaptability caused by single feedforward control in the original control logic, the environmental adaptability and the robustness of the supercharger control unit are improved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (11)
1. A control method of a supercharger, characterized in that the supercharger includes a purge valve, comprising:
acquiring a feedforward duty ratio of a current scheduling period currently used for controlling the opening of the bleed valve;
based on a self-learning mechanism, correcting the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period;
acquiring a closed-loop adjustment duty ratio of the current scheduling period currently used for controlling the opening of the deflation valve;
and determining the final pressurization control duty ratio of the current dispatching cycle according to the corrected feedforward duty ratio of the current dispatching cycle and the closed-loop adjustment duty ratio of the current dispatching cycle, and controlling the opening of a deflation valve of the supercharger by adopting the final pressurization control duty ratio of the current dispatching cycle.
2. The method of claim 1, wherein the correcting the feedforward duty cycle of the current scheduling period based on a self-learning mechanism to obtain the corrected feedforward duty cycle of the current scheduling period comprises:
acquiring a final boost control duty ratio of a previous scheduling period and a feedforward duty ratio of the previous scheduling period;
determining a correction value of the feedforward duty ratio of the current scheduling period according to the final boost control duty ratio of the previous scheduling period and the feedforward duty ratio of the previous scheduling period;
and correcting the feedforward duty ratio of the current scheduling period by adopting the correction value of the feedforward duty ratio of the current scheduling period to obtain the corrected feedforward duty ratio of the current scheduling period.
3. The method of claim 2, wherein deriving the correction to the feed-forward duty cycle for the current scheduling period based on the final boost control duty cycle for the previous scheduling period and the feed-forward duty cycle for the previous scheduling period comprises:
acquiring a first difference value, wherein the first difference value is a difference value between the final boost control duty ratio of the previous scheduling period and the feedforward duty ratio of the previous scheduling period;
and multiplying the first difference value by a self-learning step length to obtain a correction value of the feedforward duty ratio of the current scheduling period.
4. The method of any of claims 1-3, wherein determining the final boost control duty cycle for the current scheduling period based on the modified feedforward duty cycle and the closed-loop-adjusted duty cycle for the current scheduling period comprises:
and summing the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period to obtain the final pressurization control duty ratio of the current scheduling period.
5. The method of any one of claims 1 to 3, wherein obtaining the feed forward duty cycle for the current scheduling period currently used to control the opening of the bleed valve comprises:
acquiring a rotating speed value of a current scheduling period and a set supercharging pressure value of the current scheduling period;
constructing a two-dimensional table, wherein the two-dimensional table comprises a rotating speed value of the current scheduling period and a set supercharging pressure value of the current scheduling period;
and determining the feedforward duty ratio of the current scheduling period according to the two-dimensional table.
6. The method of claim 5, wherein obtaining the closed-loop adjusted duty cycle of the current schedule period currently used to control the purge valve opening comprises:
acquiring an actually measured supercharging pressure value of the current scheduling period;
acquiring a second difference value, wherein the second difference value is the difference value between the actually measured supercharging pressure value of the current scheduling period and the set supercharging pressure value of the current scheduling period;
and processing the second difference value through a PID controller to obtain the closed-loop adjustment duty ratio of the current scheduling period.
7. The method of claim 5, wherein determining the feed-forward duty cycle for the current scheduling period from the two-dimensional table comprises:
determining a point corresponding to the rotating speed value of the current scheduling period and the set supercharging pressure value of the current scheduling period in the two-dimensional table;
and determining the feedforward duty ratio of the current dispatching cycle according to the rotating speed value of the current dispatching cycle and the point corresponding to the set supercharging pressure value of the current dispatching cycle.
8. The method according to claim 5, wherein the step of determining the final boost control duty ratio of the current scheduling period according to the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period, and after controlling the opening degree of a purge valve of the supercharger by using the final boost control duty ratio of the current scheduling period, further comprises the steps of:
and updating the two-dimensional table by adopting the final pressurization control duty ratio of the current scheduling period.
9. A control device of a supercharger, characterized by comprising:
the first acquisition unit is used for acquiring the feedforward duty ratio of the current scheduling period currently used for controlling the opening of the deflation valve;
the correction unit is used for correcting the feedforward duty ratio of the current scheduling period based on a self-learning mechanism to obtain the corrected feedforward duty ratio of the current scheduling period;
a second obtaining unit, configured to obtain a closed-loop adjustment duty ratio of the current scheduling period currently used for controlling the opening of the purge valve;
and the determining unit is used for determining the final pressurization control duty ratio of the current scheduling period according to the corrected feedforward duty ratio of the current scheduling period and the closed-loop adjustment duty ratio of the current scheduling period, and controlling the opening of a deflation valve of the supercharger by adopting the final pressurization control duty ratio of the current scheduling period.
10. A computer-readable storage medium, comprising a stored program, wherein the program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform the method of any one of claims 1 to 8.
11. Supercharger, characterized in that the supercharger comprises a control unit for performing the method according to any one of claims 1-8.
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