CN113090522A - Air compressor intake flow sectional correction method, system, medium and device - Google Patents
Air compressor intake flow sectional correction method, system, medium and device Download PDFInfo
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- CN113090522A CN113090522A CN202110335055.8A CN202110335055A CN113090522A CN 113090522 A CN113090522 A CN 113090522A CN 202110335055 A CN202110335055 A CN 202110335055A CN 113090522 A CN113090522 A CN 113090522A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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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
Abstract
The invention provides a method, a system, a medium and a device for sectionally correcting the air intake flow of an air compressor, wherein the method comprises the following steps: acquiring an ambient pressure value, an ambient temperature, a current air compressor measuring flow, a post-pressure value and a current rotating speed of the air compressor; dividing the pressure value after the pressure by the ambient pressure value to obtain a pressure ratio, and obtaining the current estimated flow of the air compressor based on the basic performance curve of the air compressor, the pressure ratio, the current rotating speed and the ambient temperature; according to the difference between the current air compressor measurement flow and the current air compressor estimation flow, performing subsection correction coefficient iteration on the air compressor flow to obtain a correction factor; and correcting the target flow of the air compressor by using the correction factor to obtain the target flow of the air compressor, calculating to obtain the corrected rotating speed of the air compressor, and adjusting the rotating speed of the air compressor based on the corrected rotating speed of the air compressor. The invention is used for effectively improving the control precision of the air compressor, and the air intake quantity of equipment for providing air by the air compressor is close to a desired value, thereby improving the stability and reliability of the equipment.
Description
Technical Field
The invention relates to the technical field of air compressors, in particular to a method, a system, a medium and a device for sectionally correcting the air intake flow of an air compressor.
Background
The invention provides a sectional correction method for the air inlet flow of the air compressor of equipment. The performance of the air compressor can be aged in the process of manufacturing, assembling and long-term operation of parts of the air intake system of the air compressor, an initial performance curve can only be used as a reference under the ideal condition that the performance of the air compressor is consistent and has no abrasion, and the air intake amount of the air intake system can be deviated due to the fact that only the performance curve is used for controlling the air compressor, so that the system is unstable in operation, and the performance of the air intake system can be influenced due to long-term operation.
Therefore, it is desirable to be able to solve the problem of how to offset the amount of air flow caused by the aging of the air compressor due to the use of the air compressor.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a method, a system, a medium and a device for sectionalized correction of intake air flow of an air compressor, which are used to solve the problem of air flow deviation caused by aging of the air compressor due to the use of the air compressor in the prior art.
In order to achieve the above and other related objects, the present invention provides a segmented correction method for intake air flow of an air compressor, which is applied to an intake system, wherein the intake system comprises: the system comprises an environmental pressure sensor, an environmental temperature sensor, a flow sensor, an air compressor, a post-compression pressure sensor and a controller; the method comprises the following steps: acquiring an ambient pressure value based on an ambient pressure sensor, acquiring ambient temperature based on an ambient temperature sensor, acquiring current air compressor measurement flow based on a flow sensor, acquiring a post-pressure value based on a post-pressure sensor, and acquiring the current rotating speed of the air compressor based on a controller; dividing the pressure value after the pressure by the ambient pressure value to obtain a pressure ratio, and obtaining the current estimated flow of the air compressor based on the basic performance curve of the air compressor, the pressure ratio and the current rotating speed; according to the difference between the current air compressor measurement flow and the current air compressor estimation flow, performing subsection correction coefficient iteration on the air compressor flow to obtain a correction factor; and correcting the target flow of the air compressor by using the correction factor to obtain the target flow of the air compressor, obtaining the corrected rotating speed of the air compressor based on the basic performance curve of the air compressor, the pressure ratio and the target flow of the air compressor, and adjusting the rotating speed of the air compressor based on the corrected rotating speed of the air compressor.
In order to achieve the above object, the present invention further provides a segmented correction system for intake air flow of an air compressor, which is applied to an intake system, wherein the intake system comprises: the system comprises an environmental pressure sensor, an environmental temperature sensor, a flow sensor, an air compressor, a post-compression pressure sensor and a controller; the method comprises the following steps: the device comprises an acquisition module, an estimation module, a correction module and an adjustment module; the acquisition module is used for acquiring an ambient pressure value based on an ambient pressure sensor, acquiring ambient temperature based on an ambient temperature sensor, acquiring current air compressor measurement flow based on a flow sensor, acquiring a post-pressure value based on a post-pressure sensor, and acquiring the current rotating speed of the air compressor based on the controller; the estimation module is used for dividing the post-pressure value by the ambient pressure value to obtain a pressure ratio and obtaining the current estimated flow of the air compressor based on the basic performance curve of the air compressor, the pressure ratio and the current rotating speed; the correction module is used for performing segmented correction coefficient iteration on the air compressor flow according to the difference between the current air compressor measurement flow and the current air compressor estimation flow to obtain a correction factor; the adjusting module is used for correcting the target flow of the air compressor by using the correction factor to obtain the target flow of the air compressor, obtaining the corrected rotating speed of the air compressor based on the basic performance curve of the air compressor, the pressure ratio and the target flow of the air compressor, and adjusting the rotating speed of the air compressor based on the corrected rotating speed of the air compressor.
In order to achieve the above object, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which when executed by a processor, implements any of the above air compressor intake air flow segmentation correction methods.
In order to achieve the above object, the present invention further provides a segmented correction device for intake air flow of an air compressor, comprising: a processor and a memory; the memory is used for storing a computer program; the processor is connected with the memory and is used for executing the computer program stored in the memory so as to enable the air compressor intake flow subsection correction device to execute any one of the air compressor intake flow subsection correction methods.
Finally, the present invention also provides an air intake system comprising: the system comprises an environmental pressure sensor, an environmental temperature sensor, a flow sensor, an air compressor, a post-compression pressure sensor and a controller; the flow sensor is arranged at the air inlet end of the air compressor, and the post-pressure sensor is arranged at the air outlet end of the air compressor; the method comprises the steps of obtaining an ambient pressure value based on an ambient pressure sensor, obtaining ambient temperature based on the ambient temperature sensor, obtaining current air compressor measurement flow based on a flow sensor, obtaining a post-pressure value based on the post-pressure sensor, and obtaining the current rotating speed of the air compressor based on a controller.
As described above, the method, the system, the medium and the device for sectionally correcting the air intake flow of the air compressor have the following beneficial effects: the control method is used for effectively improving the control precision of the air compressor, and enabling the air intake quantity of equipment for providing air by the air compressor to be close to a desired value, so that the stability and the reliability of the equipment are improved.
Drawings
FIG. 1a is a flow chart illustrating a method for sectionally correcting an intake air flow of an air compressor according to an embodiment of the present invention;
FIG. 1b is a schematic diagram illustrating a basic performance curve of an air compressor according to an embodiment of the method for correcting the intake air flow of the air compressor in sections;
fig. 2 is a schematic structural diagram of an air compressor intake flow sectional correction system according to an embodiment of the present invention;
fig. 3 is a schematic structural view illustrating an intake flow sectional correction device of an air compressor according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an air intake system according to an embodiment of the present invention.
Description of the element reference numerals
21 acquisition module
22 estimation module
23 correction module
24 adjustment module
31 processor
32 memory
1 ambient pressure sensor
2 ambient temperature sensor
3 flow sensor
4 air compressor
5-pressure rear pressure sensor
6 controller
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, so that the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, the type, quantity and proportion of the components in actual implementation can be changed freely, and the layout of the components can be more complicated.
The air inlet flow sectional correction method, the air inlet flow sectional correction system, the air inlet flow sectional correction medium and the air inlet flow sectional correction device for the air compressor effectively improve the control precision of the air compressor, enable the air inlet flow of equipment for providing air by the air compressor to be close to the expected value, and accordingly improve the stability and reliability of the equipment.
As shown in fig. 1a, in an embodiment, the method for sectionally correcting the intake air flow of the air compressor of the present invention is applied to an intake system, where the intake system is shown in fig. 4, and the intake system includes: the system comprises an ambient pressure sensor 1, an ambient temperature sensor 2, a flow sensor 3, an air compressor 4, a post-pressure sensor 5 and a controller 6. The controller is a CPU.
In particular, the air intake system is a fuel air intake system for providing air to a fuel device.
The method comprises the following steps:
step S11, acquiring an ambient pressure value P _ amb based on the ambient pressure sensor, acquiring an ambient temperature T _ amb based on the ambient temperature sensor, acquiring a current air compressor measurement Flow based on the Flow sensor, acquiring a post-pressure value P _ out based on the post-pressure sensor, and acquiring a current rotating speed Spd _ acp of the air compressor based on the controller.
And step S12, dividing the post-pressure value P _ out by the ambient pressure value P _ amb to obtain a pressure ratio P _ out/P _ amb, and obtaining the current estimated air compressor Flow rate 1 based on the basic performance curve of the air compressor, the pressure ratio P _ out/P _ amb and the current rotating speed x.
Specifically, the basic performance curve of the air compressor is shown in fig. 1b, the basic performance curve of the air compressor is a three-dimensional Map under a standard condition environment, the abscissa is the rotating speed, the ordinate is the pressure ratio of the air compressor, and the three-dimensional Map is queried according to the current rotating speed x and the pressure ratio P _ out/P _ amb to obtain the current estimated flow of the air compressor.
Specifically, the calculation formula of the current estimated air compressor Flow1 is as follows:
flow1 ═ Map (Spd _ acp @ sqrt (293.5/T _ amb), P _ out/P _ amb) · (P _ amb/101.3) · sqrt (293.5/T _ amb). Wherein Map refers to the basic performance curve of the air compressor.
And S13, performing subsection correction coefficient iteration on the air compressor Flow according to the difference between the current air compressor measured Flow and the current air compressor estimated Flow1 to obtain a correction factor.
Specifically, the step of performing segmented correction coefficient iteration on the air compressor Flow according to the difference between the current air compressor measured Flow and the current air compressor estimated Flow1 to obtain the correction factor of the air compressor includes the following steps:
and acquiring a basic performance curve and an initial correction coefficient interval of the air compressor.
And calculating to obtain a current correction coefficient based on the Flow correction formula, the current measured Flow of the air compressor and the current estimated Flow of the air compressor 1.
Segmenting the rotating speed of the air compressor from 0 to the highest rotating speed to obtain rotating speed segments, wherein the node of each rotating speed segment corresponds to an initial correction coefficient.
Judging the rotating speed section of the current rotating speed x, calculating the current air compressor rotating speed factor of the rotating speed section, calculating to obtain a correction factor based on the current air compressor rotating speed factor and a correction factor calculation formula, and calculating to obtain the correction factor at the current rotating speed based on the correction factor and an air compressor target flow correction formula.
For example:
and acquiring a basic performance curve and an initial correction coefficient interval of the air compressor. The three-dimensional Map table of the air compressor and the initial correction coefficient intervals [ f0, f1, f2 and f3 … fn [ are preset in the EEPROM of the controller ]. Namely, the rotating speed of the air compressor is segmented from 0 to the highest rotating speed and is divided into n segments.
And calculating to obtain a current correction coefficient based on the Flow correction formula, the current measured Flow of the air compressor and the current estimated Flow of the air compressor 1. And f, a Flow correction formula is (Flow1-Flow)/Flow K, wherein K is a correction rate, and K is smaller than 1, and the correction rate is used for reducing the current correction coefficient f, slowing down the correction rate and smoothing the correction.
Segmenting the rotating speed of the air compressor from 0 to the highest rotating speed to obtain rotating speed segments, wherein the node of each rotating speed segment corresponds to an initial correction coefficient. Segmenting the rotating speed of the air compressor from 0 to the highest rotating speed, supposing to be divided into n segments, and presetting a corresponding rotating speed initial correction coefficient interval [ f0,f1,f2,f3…fn]Each correction coefficient corresponds to a node [ x ] of each rotating speed section of the air compressor0,x1,x2,x3…xn]。
Judging the rotating speed section of the current rotating speed x, calculating the current air compressor rotating speed factor of the rotating speed section, calculating to obtain a correction factor based on the current air compressor rotating speed factor and a correction factor calculation formula, and calculating to obtain the correction factor at the current rotating speed based on the correction factor and an air compressor target flow correction formula. Judging the rotation speed section of the current air compressor rotation speed, assuming that the rotation speed section is [ x ]w-1,xw]The interval w ∈ n. Calculating the current air compressor speed factor, wherein m2 is (x)w-x)/(xw-xw-1)，m3＝(x-xw-1)/(xw-xw-1). Obtaining a correction factor f by a correction factor calculation formulaw-1＝fw-1+f*mw-1，fw＝fw+f*mw. Correction factor and air compressor target flow correctionAnd calculating by a positive formula to obtain a correction factor fx at the current rotating speed. The air compressor target flow correction formula: f. ofx＝(x-xw-1)/(xw-x w-1)*(fw-fw-1)+fw-1。
For example, an air compressor basic performance curve and an initial correction coefficient interval are obtained. The three-dimensional Map table of the air compressor and the initial correction coefficient intervals [ f0, f1, f2, f3, f4 and f5] are preset in the EEPROM of the controller.
And calculating to obtain a current correction coefficient based on the Flow correction formula, the current measured Flow of the air compressor and the current estimated Flow of the air compressor 1. And f, a Flow correction formula is (Flow1-Flow)/Flow K, wherein K is a correction rate, and K is smaller than 1, and the correction rate is used for reducing the current correction coefficient f, slowing down the correction rate and smoothing the correction.
Segmenting the rotating speed of the air compressor from 0 to the highest rotating speed to obtain rotating speed segments, wherein the node of each rotating speed segment corresponds to an initial correction coefficient. Segmenting the rotating speed of the air compressor from 0 to the highest rotating speed, supposing to be divided into 5 segments, and presetting an initial correction coefficient interval [ f ] of the corresponding rotating speed0,f1,f2,f3,f4,f5]Each correction coefficient corresponds to a node [ x ] of each rotating speed section of the air compressor0,x1,x2,x3,x4,x5]。
Judging the rotating speed section of the current rotating speed x, calculating the current air compressor rotating speed factor of the rotating speed section, calculating to obtain a correction factor based on the current air compressor rotating speed factor and a correction factor calculation formula, and calculating to obtain the correction factor at the current rotating speed based on the correction factor and an air compressor target flow correction formula. Judging the rotation speed section of the current air compressor rotation speed, assuming that the rotation speed section is [ x ]2,x3]An interval. Calculating the current air compressor speed factor m2＝(x3-x)/(x3-x2)，m3＝(x-x2)/(x3-x2). Obtaining a correction factor f by a correction factor calculation formula2＝f2+f*m2，f3＝f3+f*m3. Based on correction factor and air compressor machine target flowThe correction factor f under the current rotating speed is obtained by calculation through a correction formulax. The air compressor target flow correction formula: f. ofx＝(x-x2)/(x3-x2)*(f3-f2)+f2。
And S14, correcting the target Flow _ tar of the air compressor by using the correction factor to obtain the target Flow _ tar of the air compressor, obtaining the corrected rotating speed of the air compressor based on the basic performance curve of the air compressor, the pressure ratio P _ out/P _ amb and the target Flow _ tar of the air compressor, and adjusting the rotating speed of the air compressor based on the corrected rotating speed of the air compressor.
In particular, the correction factor f at the current rotation speed is usedxAnd correcting the target Flow of the air compressor by using a correction factor fx, wherein the correction formula is Flow _ tar ═ Flow _ tar ×.fx. Flow _ tar is the air compressor target Flow. Specifically, the basic performance curve of the air compressor is shown in fig. 1b, the basic performance curve of the air compressor is a three-dimensional Map under a standard condition environment, the abscissa is the rotating speed, the ordinate is the pressure ratio of the air compressor, and the three-dimensional Map is queried according to the target flow rate and the pressure ratio P _ out/P _ amb of the air compressor to obtain the corrected rotating speed of the air compressor at present.
Specifically, the method further comprises the step of repeating the steps S11 to S14 so as to continuously adjust the rotating speed of the air compressor.
Specifically, the method further comprises the step of storing the current correction coefficient interval when the controller is powered down as the initial correction coefficient interval when the controller is powered up next time.
Specifically, when the controller is powered off, the correction coefficient interval is stored in the EEPROM before the controller is powered off, and the EEPROM data is read after the controller is powered on next time and is assigned to the initial correction coefficient interval in advance. The method and the device can effectively solve the problem of consistency caused by manufacturing difference of air compressor parts and long-term operation abrasion of the parts, eliminate control errors, improve the accuracy of air inlet flow of the air compressor, and enable actual air inflow to tend to an expected value, thereby ensuring stable operation of a system and effectively improving the stability and reliability of a fuel system.
As shown in fig. 2, in an embodiment, the air intake flow subsection correction system of an air compressor of the present invention is applied to an air intake system, and the air intake system includes: the system comprises an environmental pressure sensor, an environmental temperature sensor, a flow sensor, an air compressor, a post-compression pressure sensor and a controller; the method comprises the following steps: an acquisition module 21, an estimation module 22, a correction module 23 and an adjustment module 24.
The acquisition module 21 is configured to acquire an ambient pressure value based on an ambient pressure sensor, acquire an ambient temperature based on an ambient temperature sensor, acquire a current air compressor measurement flow based on a flow sensor, acquire a post-pressure value based on a post-pressure sensor, and acquire a current rotation speed of the air compressor based on a controller.
The estimation module 22 is configured to divide the post-pressure value by the ambient pressure value to obtain a pressure ratio, and obtain a current estimated flow of the air compressor based on the basic performance curve of the air compressor, the pressure ratio, and the current rotation speed.
The correction module 23 is configured to perform segmented correction coefficient iteration on the air compressor flow according to a difference between the current air compressor measurement flow and the current air compressor estimation flow, so as to obtain a correction factor.
The adjusting module 24 is configured to correct the target flow of the air compressor by using the correction factor to obtain a target flow of the air compressor, obtain a corrected rotation speed of the air compressor based on the basic performance curve of the air compressor, the pressure ratio, and the target flow of the air compressor, and adjust the rotation speed of the air compressor based on the corrected rotation speed of the air compressor.
Specifically, the correction module is configured to perform piecewise correction coefficient iteration on the air compressor flow according to a difference between a current air compressor measurement flow and a current air compressor estimation flow, and obtain a correction factor, where the correction factor includes: acquiring a basic performance curve and an initial correction coefficient interval of the air compressor; calculating to obtain a current correction coefficient based on a flow correction formula, the current air compressor measurement flow and the current air compressor estimation flow; segmenting the rotating speed of the air compressor from 0 to the highest rotating speed to obtain rotating speed segments, wherein the node of each rotating speed segment corresponds to an initial correction coefficient; judging the rotating speed section of the current rotating speed, calculating the current air compressor rotating speed factor of the rotating speed section, calculating to obtain a correction factor based on the current air compressor rotating speed factor and a correction factor calculation formula, and calculating to obtain the correction factor at the current rotating speed based on the correction factor and an air compressor target flow correction formula.
Specifically, the controller further comprises a storage module used for storing the current correction coefficient interval when the controller is powered off to serve as the initial correction coefficient interval when the controller is powered on next time.
It should be noted that the structures and principles of the obtaining module 21, the estimating module 22, the correcting module 23, and the adjusting module 24 correspond to the steps in the air compressor intake flow sectional correcting method one by one, and therefore, the description is omitted here.
It should be noted that the division of the modules of the above system is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the x module may be a processing element that is set up separately, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and the function of the x module may be called and executed by a processing element of the apparatus. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Specific Integrated circuits (ASICs), or one or more Microprocessors (MPUs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
In an embodiment of the present invention, the present invention further includes a computer readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements any one of the above methods for sectionalizing the intake air flow of the air compressor.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the above method embodiments may be performed by hardware associated with a computer program. The aforementioned computer program may be stored in a computer readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
As shown in fig. 3, in an embodiment, the air compressor intake flow subsection correcting apparatus of the present invention includes: a processor 31 and a memory 32; the memory 32 is for storing a computer program; the processor 31 is connected to the memory 32 and is configured to execute a computer program stored in the memory 32 to enable the air compressor intake flow segmentation correction device to execute any one of the air compressor intake flow segmentation correction methods.
Specifically, the memory 32 includes: various media that can store program codes, such as ROM, RAM, magnetic disk, U-disk, memory card, or optical disk.
Preferably, the Processor 31 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components.
As shown in fig. 4, in an embodiment of the present invention, the air intake system of the air compressor comprises: the system comprises an ambient pressure sensor 1, an ambient temperature sensor 2, a flow sensor 3, an air compressor 4, a post-pressure sensor 5 and a controller 6.
The flow sensor set up in the inlet end of air compressor machine, press back pressure sensor set up in the end of giving vent to anger of air compressor machine.
The method comprises the steps of obtaining an ambient pressure value based on an ambient pressure sensor, obtaining ambient temperature based on the ambient temperature sensor, obtaining current air compressor measurement flow based on a flow sensor, obtaining a post-pressure value based on the post-pressure sensor, and obtaining the current rotating speed of the air compressor based on a controller.
In particular, the air intake system is a fuel air intake system for providing air to a fuel device.
In summary, the air intake flow subsection correction method, the air intake flow subsection correction system, the air intake flow subsection correction medium and the air intake flow subsection correction device for the air compressor are used for effectively improving the control precision of the air compressor, enabling the air intake flow of equipment for providing air by the air compressor to be close to the expected value, and therefore improving the stability and the reliability of the equipment. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The segmented correction method for the intake air flow of the air compressor is characterized by being applied to an intake system, wherein the intake system comprises: the system comprises an environmental pressure sensor, an environmental temperature sensor, a flow sensor, an air compressor, a post-compression pressure sensor and a controller; the method comprises the following steps:
acquiring an ambient pressure value based on an ambient pressure sensor, acquiring ambient temperature based on an ambient temperature sensor, acquiring current air compressor measurement flow based on a flow sensor, acquiring a post-pressure value based on a post-pressure sensor, and acquiring the current rotating speed of the air compressor based on a controller;
dividing the pressure value after the pressure by the ambient pressure value to obtain a pressure ratio, and obtaining the current estimated flow of the air compressor based on the basic performance curve of the air compressor, the pressure ratio and the current rotating speed;
according to the difference between the current air compressor measurement flow and the current air compressor estimation flow, performing subsection correction coefficient iteration on the air compressor flow to obtain a correction factor;
and correcting the target flow of the air compressor by using the correction factor to obtain the target flow of the air compressor, obtaining the corrected rotating speed of the air compressor based on the basic performance curve of the air compressor, the pressure ratio and the target flow of the air compressor, and adjusting the rotating speed of the air compressor based on the corrected rotating speed of the air compressor.
2. The method for sectionally correcting the air intake flow of the air compressor according to claim 1, wherein the step of performing subsection correction coefficient iteration on the flow of the air compressor according to the difference between the current measured flow of the air compressor and the current estimated flow of the air compressor to obtain the correction factor of the air compressor comprises the following steps:
acquiring a basic performance curve and an initial correction coefficient interval of the air compressor;
calculating to obtain a current correction coefficient based on a flow correction formula, the current air compressor measurement flow and the current air compressor estimation flow;
segmenting the rotating speed of the air compressor from 0 to the highest rotating speed to obtain rotating speed segments, wherein the node of each rotating speed segment corresponds to an initial correction coefficient;
judging the rotating speed section of the current rotating speed, calculating the current air compressor rotating speed factor of the rotating speed section, calculating to obtain a correction factor based on the current air compressor rotating speed factor and a correction factor calculation formula, and calculating to obtain the correction factor at the current rotating speed based on the correction factor and an air compressor target flow correction formula.
3. The method for correcting the intake air flow of the air compressor according to claim 1, further comprising storing a current correction coefficient interval when the controller is powered down as an initial correction coefficient interval at the next power-up of the controller.
4. The air compressor intake air flow segmentation correction method as claimed in claim 1, characterized in that the intake system is a fuel intake system.
5. The air compressor inlet flow subsection correcting system is characterized by being applied to an air inlet system, and the air inlet system comprises: the system comprises an environmental pressure sensor, an environmental temperature sensor, a flow sensor, an air compressor, a post-compression pressure sensor and a controller; the method comprises the following steps: the device comprises an acquisition module, an estimation module, a correction module and an adjustment module;
the acquisition module is used for acquiring an ambient pressure value based on an ambient pressure sensor, acquiring ambient temperature based on an ambient temperature sensor, acquiring current air compressor measurement flow based on a flow sensor, acquiring a post-pressure value based on a post-pressure sensor, and acquiring the current rotating speed of the air compressor based on the controller;
the estimation module is used for dividing the post-pressure value by the ambient pressure value to obtain a pressure ratio and obtaining the current estimated flow of the air compressor based on the basic performance curve of the air compressor, the pressure ratio and the current rotating speed;
the correction module is used for performing segmented correction coefficient iteration on the air compressor flow according to the difference between the current air compressor measurement flow and the current air compressor estimation flow to obtain a correction factor;
the adjusting module is used for correcting the target flow of the air compressor by using the correction factor to obtain the target flow of the air compressor, obtaining the corrected rotating speed of the air compressor based on the basic performance curve of the air compressor, the pressure ratio and the target flow of the air compressor, and adjusting the rotating speed of the air compressor based on the corrected rotating speed of the air compressor.
6. The air compressor intake flow subsection correction system of claim 5, wherein the correction module is configured to perform subsection correction coefficient iteration on the air compressor flow according to a difference between a current air compressor measured flow and a current air compressor estimated flow, and obtaining the correction factor comprises:
acquiring a basic performance curve and an initial correction coefficient interval of the air compressor;
calculating to obtain a current correction coefficient based on a flow correction formula, the current air compressor measurement flow and the current air compressor estimation flow;
segmenting the rotating speed of the air compressor from 0 to the highest rotating speed to obtain rotating speed segments, wherein the node of each rotating speed segment corresponds to an initial correction coefficient;
judging the rotating speed section of the current rotating speed, calculating the current air compressor rotating speed factor of the rotating speed section, calculating to obtain a correction factor based on the current air compressor rotating speed factor and a correction factor calculation formula, and calculating to obtain the correction factor at the current rotating speed based on the correction factor and an air compressor target flow correction formula.
7. The air compressor intake air flow segmentation correction system of claim 5, further comprising a storage module for storing a current correction coefficient interval as an initial correction coefficient interval at a next controller power-up time when the controller is powered-down.
8. A computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the air compressor intake air flow segmentation correction method of any one of claims 1 to 4.
9. The utility model provides an air compressor machine air intake flow segmentation correcting unit which characterized in that includes: a processor and a memory;
the memory is used for storing a computer program;
the processor is connected with the memory and is used for executing the computer program stored in the memory so as to enable the air compressor intake flow subsection correction device to execute the air compressor intake flow subsection correction method of any one of claims 1 to 4.
10. An air intake system, characterized by comprising: the system comprises an environmental pressure sensor, an environmental temperature sensor, a flow sensor, an air compressor, a post-compression pressure sensor and a controller;
the flow sensor is arranged at the air inlet end of the air compressor, and the post-pressure sensor is arranged at the air outlet end of the air compressor;
the method comprises the steps of obtaining an ambient pressure value based on an ambient pressure sensor, obtaining ambient temperature based on the ambient temperature sensor, obtaining current air compressor measurement flow based on a flow sensor, obtaining a post-pressure value based on the post-pressure sensor, and obtaining the current rotating speed of the air compressor based on a controller.
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