Multi-valve-group continuous variable mach number control device and control method
Through the multi-valve group continuous variable Mach number control device and control method, the low-pressure air source, pressure sensor and central controller are used to achieve continuous and high-precision control of Mach number in the runner, solving the problems of synchronous adjustment and precise control in the prior art, and are suitable for the aerospace field.
Patent Information
- Application Number
- CN202510911952.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-03
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2045-07-03
AI Technical Summary
The existing multi-valve group continuous Mach number device has challenges in precise control and synchronous adjustment, and it is difficult to achieve continuous changes in Mach number in the runner and achieve high-precision target value.
A multi-valve group continuous Mach number control device is designed. Through the coordinated work of low-pressure air source, pressure sensor and central controller, combined with the action unit of the soft wall nozzle and the EtherCAT real-time bus, the precise control and synchronous adjustment of multiple valves are achieved, and the target pressure is adjusted by using incremental PI closed-loop control method.
It realizes continuous, reliable and high-precision changes in the Mach number in the runner, meets the real-time, stability and convenience requirements of the system, and is suitable for multi-valve group continuous variable Mach number control in the aerospace field.
Smart Images
Figure CN120406101A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of flow field control of multi-valve group devices, and particularly relates to a multi-valve group continuous variable Mach number control device and a control method. Background Technique
[0002] The multi-valve group continuous variable Mach number device is equipment used in the research of the field of aerodynamics, providing strong support and guarantee for the development of the aviation and aerospace fields. The multi-valve group continuous variable Mach number device uses a compressor unit as a continuous driving gas source, adjusts the intake valve group and the extraction valve group to form a target total pressure and a target extraction pressure at the front and rear of the test section, and at the same time ensures that the nozzle profile is at the target Mach number, and controls the regulating valve group in real time to maintain the Mach number of the flow channel at the target Mach number. Since the target Mach number in the flow channel is a continuously changing state, it is necessary to ensure that a series of regulating devices such as the intake pressure, extraction pressure, total pressure, and nozzle are continuously coordinated and synchronized while ensuring that the Mach number accurately reaches the target value, which puts forward higher requirements for the control process and control accuracy of the entire system. For the above reasons, there is an urgent need for a set of multi-valve group continuous variable Mach number devices and methods that can complete precise control and synchronous control to meet the relevant test requirements of continuous variable Mach. Summary of the Invention
[0003] The problem to be solved by the present invention is the target quantity precision control and multi-valve group synchronous control under the condition of continuous variable Mach number, and a multi-valve group continuous variable Mach number control device and a control method are proposed.
[0004] To achieve the above object, the present invention is realized through the following technical solutions: A multi-valve group continuous variable Mach number control device includes a low-pressure gas source, the low-pressure gas source is connected to a low-pressure intake stop valve, the low-pressure intake stop valve is connected to a low-pressure air release main regulating valve, a low-pressure air release auxiliary regulating valve and a low-pressure stop valve, the low-pressure air release main regulating valve and the low-pressure air release auxiliary regulating valve are connected to an air release tower, a medium-pressure gas source is connected to a medium-pressure intake stop valve, the medium-pressure intake stop valve is connected to a medium-pressure air release main regulating valve, a medium-pressure air release auxiliary regulating valve and a medium-pressure stop valve, the medium-pressure air release main regulating valve and the medium-pressure air release auxiliary regulating valve are connected to the air release tower, an air release stop valve is connected to the air release tower, a main pipeline intake side stop valve is connected to the low-pressure stop valve, the medium-pressure stop valve, the air release stop valve, a main pipeline main regulating valve and a main pipeline auxiliary regulating valve, the main pipeline main regulating valve and the main pipeline auxiliary regulating valve are connected to a stabilization section, the stabilization section, a flexible wall nozzle, a test section, and a main pipeline extraction side stop valve are sequentially connected, the main pipeline extraction side stop valve is connected to an extraction main regulating valve, an extraction auxiliary regulating valve, a gas supplementing regulating valve, and an exhaust stop valve, the exhaust stop valve is connected to an exhaust tower, the gas supplementing regulating valve, a gas supplementing stop valve, and a gas supplementing tower are sequentially connected, the extraction main regulating valve and the extraction auxiliary regulating valve are connected to an extraction stop valve, and the extraction stop valve is connected to an extraction device; A low-pressure pressure sensor is installed on the pipeline between the low-pressure intake shut-off valve and the low-pressure shut-off valve, a medium-pressure pressure sensor is installed on the pipeline between the medium-pressure intake shut-off valve and the medium-pressure shut-off valve, a total pressure sensor of the stable section is installed in the stable section, a static pressure sensor of the test section is installed in the test section, and an extraction pressure sensor is installed on the connecting pipeline between the main pipeline extraction side shut-off valve and the main extraction regulating valve, the auxiliary extraction regulating valve, the air supply regulating valve, and the exhaust shut-off valve; the central controller controls and adjusts all valves based on the pressure data collected by the low-pressure pressure sensor, the medium-pressure pressure sensor, the total pressure sensor of the stable section, the static pressure sensor of the test section, and the extraction pressure sensor.
[0005] Further, the flexible-wall nozzle is designed to be symmetric up and down. The upper flexible-wall group and the lower flexible-wall group are respectively installed on the upper wall and the lower wall of the nozzle. The upper flexible-wall group and the lower flexible-wall group each include a number of action units and flexible wall panels arranged at equal intervals. Each action unit consists of a motor, a reducer, and a lift. The end of the lift of each action unit is connected to the flexible wall panel. The nozzle controller is connected to each action unit through the EtherCAT real-time bus.
[0006] Further, during the primary profile movement, the nozzle controller controls all the action units of the upper flexible-wall group and the lower flexible-wall group to move synchronously, so that the flexible wall panel moves from profile A to profile B.
[0007] Further, the designed flow rate of the low-pressure bleed auxiliary regulating valve is set to 1 / 4 of the designed flow rate of the low-pressure bleed main regulating valve, the designed flow rate of the medium-pressure bleed auxiliary regulating valve is set to 1 / 4 of the designed flow rate of the medium-pressure bleed main regulating valve, the designed flow rate of the main pipeline auxiliary regulating valve is set to 1 / 4 of the designed flow rate of the main pipeline main regulating valve, and the designed flow rate of the extraction auxiliary regulating valve is set to 1 / 4 of the designed flow rate of the extraction main regulating valve.
[0008] A control method for a multi-valve group continuous variable Mach number control device is realized based on the described multi-valve group continuous variable Mach number control device, and includes the following steps: S1. Through simulation calculation and profile calibration, establish the corresponding relationship between the profile of the flexible-wall nozzle and the target Mach number and select the Mach number; S2. Based on the Mach number selected in step S1, determine the target values of the total pressure of the stable section and the static pressure of the test section corresponding thereto, judge whether to supply gas with a low-pressure gas source or a medium-pressure gas source, and determine the target value of the extraction pressure or the target value of the low-pressure intake pressure or the target value of the medium-pressure intake pressure corresponding to the selected Mach number according to the test purpose; S3. Discretize the profile of the flexible-wall nozzle according to the selected Mach number discrete points, synchronously control the corresponding nozzle profile, total pressure in the settling chamber, static pressure in the test section, low-pressure inlet pressure, and extraction pressure, or synchronously control the nozzle profile, total pressure in the settling chamber, static pressure in the test section, medium-pressure inlet pressure, and extraction pressure. When the intervals between the Mach numbers in the Mach number discrete points do not meet the requirements, perform linear interpolation between points to construct a parameter correspondence table for each variable in the continuous variable Mach number process, and perform real-time control on a multi-valve group continuous variable Mach number control device.
[0009] Further, the calculation formulas for determining the target values of the total pressure in the settling chamber and the static pressure in the test section in step S2 are: ; where, is the Mach number, is the total pressure in the settling chamber, is the static pressure in the test section.
[0010] In step S3, the incremental PI closed-loop control method is used to synchronously control the target pressures of the low-pressure bleed auxiliary regulating valve, low-pressure bleed main regulating valve, medium-pressure bleed auxiliary regulating valve, medium-pressure bleed main regulating valve, main pipeline auxiliary regulating valve, main pipeline main regulating valve, extraction auxiliary regulating valve, and extraction main regulating valve.
[0011] Further, the specific implementation method of step S3 includes the following steps: S3.1. Close the low-pressure inlet stop valve, medium-pressure inlet stop valve, low-pressure bleed main regulating valve, low-pressure bleed auxiliary regulating valve, medium-pressure bleed main regulating valve, medium-pressure bleed auxiliary regulating valve, low-pressure stop valve, medium-pressure stop valve, main pipeline inlet side stop valve, main pipeline main regulating valve, main pipeline auxiliary regulating valve, main pipeline extraction side stop valve, extraction main regulating valve, extraction auxiliary regulating valve, extraction stop valve, air supply regulating valve, air supply stop valve, exhaust stop valve, open the bleed stop valve, and keep the nozzle profile at the initial profile ; S3.2. Based on step S2, determine whether to supply gas using low-pressure gas source or medium-pressure gas source, and perform adjustment control of low-pressure target pressure or medium-pressure target pressure; The adjustment control method of the low-pressure target pressure is to open the low-pressure inlet stop valve. After the reading of the low-pressure pressure sensor remains stable, open the low-pressure bleed main regulating valve for closed-loop control. When the real-time reading of the low-pressure pressure sensor meets the relationship formula (1) with the initial target value (1) where, is the error band of the low - pressure intake pressure; The adjustment and control method of the medium - pressure target pressure is to open the medium - pressure intake shut - off valve. After the reading of the medium - pressure pressure sensor remains stable, open the main medium - pressure bleed regulating valve for closed - loop control. When the real - time reading of the medium - pressure pressure sensor and the initial target value of the medium - pressure pressure sensor satisfy the relational expression (2), keep the valve position of the main medium - pressure bleed regulating valve unchanged, and start the closed - loop control of the auxiliary medium - pressure bleed regulating valve. The expression is: (2) where, is the error band of the medium - pressure intake pressure; S3.3. Based on the adjustment and control of the low - pressure target pressure or the medium - pressure target pressure in step S3.2, open the low - pressure shut - off valve or the medium - pressure shut - off valve, close the bleed shut - off valve, open the intake - side shut - off valve of the main pipeline, and open the main regulating valve of the main pipeline for closed - loop control. When the real - time reading of the total - pressure sensor in the stable section and the initial target value of the total - pressure sensor in the stable section satisfy the relational expression (3), keep the valve position of the main regulating valve of the main pipeline unchanged, and start the closed - loop control of the auxiliary regulating valve of the main pipeline. The expression is: (3) where, is the error band of the total - pressure in the voltage - stabilizing section; S3.4. Open the extraction shut - off valve and the air - make - up shut - off valve. If the real - time reading of the extraction - pressure sensor and the initial target value of the extraction - pressure sensor satisfy the relational expression (4), then open the main extraction regulating valve for closed - loop control. When the real - time reading of the extraction - pressure sensor and the initial target value of the extraction - pressure sensor satisfy the relational expression (5), keep the valve position of the main extraction regulating valve unchanged, and start the closed - loop control of the auxiliary extraction regulating valve. When the situation of the relational expression (6) appears, keep the valve positions of the main extraction regulating valve and the auxiliary extraction regulating valve unchanged, and start the closed - loop control of the air - make - up regulating valve. The expression is: (4) (5) (6) where, is the error band of the extraction pressure; After steps S3.1 to S3.4, the initial Mach number has been formed in the test section at this time ; S3.5. The central controller synchronously controls the nozzle profile, the main regulating valve of the main pipeline, the main regulating valve of the low-pressure bleed air, the main regulating valve of the extraction air, or the air supply regulating valve, so that the nozzle profile, the total pressure of the stable section, the low-pressure bleed air pressure, and the extraction air pressure reach the target values corresponding to the steps 、 、 、 simultaneously. At this time, the Mach number is formed. Step S3.5 is repeatedly executed until all Mach number sequences are completed, where is the nozzle profile at the Mach number , is the total pressure of the stable section at the Mach number , is the target value of the low-pressure pressure sensor at the Mach number , is the target value of the extraction air pressure sensor at the Mach number .
[0012] Advantages of the present invention: A multi-valve group continuous variable Mach number control device described in the present invention can effectively coordinate a complex system of multiple valves and multiple components, and realize a continuous, reliable, and high-precision variable state of the controlled Mach number in the device flow channel. The present invention can meet the requirements of the system as a whole in many aspects such as real-time performance, stability, reliability, and convenience and operability of the control process, and has a good application prospect in continuous variable Mach number control. Brief description of the drawings
[0013] Figure 1 is a schematic structural diagram of a multi-valve group continuous variable Mach number control device described in the present invention. In the figure: 1 - low-pressure air source, 2 - medium-pressure air source, 3 - bleed air tower, 4 - low-pressure intake shut-off valve, 5 - medium-pressure intake shut-off valve, 6 - main regulating valve of low-pressure bleed air, 7 - auxiliary regulating valve of low-pressure bleed air, 8 - main regulating valve of medium-pressure bleed air, 9 - auxiliary regulating valve of medium-pressure bleed air, 10 - low-pressure shut-off valve, 11 - medium-pressure shut-off valve, 12 - bleed air shut-off valve, 13 - intake side shut-off valve of the main pipeline, 14 - main regulating valve of the main pipeline, 15 - auxiliary regulating valve of the main pipeline, 16 - stable section, 17 - flexible wall nozzle, 18 - test section, 19 - extraction side shut-off valve of the main pipeline, 20 - main regulating valve of extraction air, 21 - auxiliary regulating valve of extraction air, 22 - extraction shut-off valve, 23 - air supply regulating valve, 24 - air supply shut-off valve, 25 - exhaust shut-off valve, 26 - exhaust tower, 27 - air supply tower, 28 - extraction device, 29 - low-pressure pressure sensor, 30 - medium-pressure pressure sensor, 31 - total pressure sensor of the stable section, 32 - static pressure sensor of the test section, 33 - extraction air pressure sensor, 34 - central controller; Figure 2This is the structural diagram of the flexible-wall nozzle of the present invention. In the figure: 101 - upper flexible-wall group, 102 - lower flexible-wall group, 103 - upper wall of the nozzle, 104 - lower wall of the nozzle, 105 - actuating unit, 106 - motor, 107 - reducer, 108 - elevator, 109 - flexible wall panel, 110 - nozzle controller; Figure 3 This is the control principle diagram of the present invention; Figure 4 This is the flowchart of the control method of a multi-valve-group continuous variable Mach number control device according to the present invention. Specific embodiments
[0014] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the specific embodiments described are only a part of the embodiments of the present invention, rather than all of the specific embodiments. The components of the specific embodiments of the present invention usually described and shown in the drawings here can be arranged and designed in various different configurations, and the present invention can also have other embodiments.
[0015] Therefore, the detailed description of the specific embodiments of the present invention provided in the drawings below is not intended to limit the scope of the claimed present invention, but merely represents the selected specific embodiments of the present invention. All other specific embodiments obtained by those skilled in the art based on the specific embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.
[0016] To further understand the content, features and effects of the present invention, the following specific embodiments are exemplified and combined with the attached Figure 1 - Attached Figure 4 The details are as follows:
[0017] Example 1: A multi-valve group continuous variable Mach number control device includes a low-pressure air source 1. The low-pressure air source 1 is connected to a low-pressure intake shut-off valve 4. The low-pressure intake shut-off valve 4 is connected to a low-pressure bleed main regulating valve 6, a low-pressure bleed auxiliary regulating valve 7, and a low-pressure shut-off valve 10. The low-pressure bleed main regulating valve 6 and the low-pressure bleed auxiliary regulating valve 7 are connected to a bleed tower 3. A medium-pressure air source 2 is connected to a medium-pressure intake shut-off valve 5. The medium-pressure intake shut-off valve 5 is connected to a medium-pressure bleed main regulating valve 8, a medium-pressure bleed auxiliary regulating valve 9, and a medium-pressure shut-off valve 11. The medium-pressure bleed main regulating valve 8 and the medium-pressure bleed auxiliary regulating valve 9 are connected to the bleed tower 3. A bleed shut-off valve 12 is connected to the bleed tower 3. A main pipeline intake side shut-off valve 13 is connected to the low-pressure shut-off valve 10, the medium-pressure shut-off valve 11, the bleed shut-off valve 12, a main pipeline main regulating valve 14, and a main pipeline auxiliary regulating valve 15. The main pipeline main regulating valve 14 and the main pipeline auxiliary regulating valve 15 are connected to a stabilization section 16. The stabilization section 16, a flexible-wall nozzle 17, a test section 18, and a main pipeline extraction side shut-off valve 19 are sequentially connected. The main pipeline extraction side shut-off valve 19 is connected to an extraction main regulating valve 20, an extraction auxiliary regulating valve 21, a supplementary air regulating valve 23, and an exhaust shut-off valve 25. The exhaust shut-off valve 25 is connected to an exhaust tower 26. The supplementary air regulating valve 23, a supplementary air shut-off valve 24, and a supplementary air tower 27 are sequentially connected. The extraction main regulating valve 20 and the extraction auxiliary regulating valve 21 are connected to an extraction shut-off valve 22. The extraction shut-off valve 22 is connected to an extraction device 28; A low-pressure pressure sensor 29 is installed on the pipeline between the low-pressure intake shut-off valve 4 and the low-pressure shut-off valve 10. A medium-pressure pressure sensor 30 is installed on the pipeline between the medium-pressure intake shut-off valve 5 and the medium-pressure shut-off valve 11. A stabilization section total pressure sensor 31 is installed in the stabilization section 16. A test section static pressure sensor 32 is installed in the test section 18. An extraction pressure sensor 33 is installed on the connecting pipeline of the main pipeline extraction side shut-off valve 19 with the extraction main regulating valve 20, the extraction auxiliary regulating valve 21, the supplementary air regulating valve 23, and the exhaust shut-off valve 25. A central controller 34 controls and regulates all valves based on the pressure data collected by the low-pressure pressure sensor 29, the medium-pressure pressure sensor 30, the stabilization section total pressure sensor 31, the test section static pressure sensor 32, and the extraction pressure sensor 33.
[0018] Further, the flexible-wall nozzle 17 is designed to be symmetric up and down. The upper flexible-wall group 101 and the lower flexible-wall group 102 are respectively installed on the upper wall 103 and the lower wall 104 of the nozzle. The upper flexible-wall group 101 and the lower flexible-wall group 102 each include a number of equally spaced action units 105 and flexible wall panels 109. Each action unit 105 consists of a motor 106, a reducer 107, and a lifter 108. The end of the lifter 108 of each action unit 105 is connected to the flexible wall panel 109. The nozzle controller 110 is connected to each action unit 105 through an EtherCAT real-time bus.
[0019] Further, during the primary profile movement, the nozzle controller 110 controls all the actuating units 105 of the upper flexible wall group 101 and the lower flexible wall group 102 to move synchronously, thereby moving the flexible wall panel 109 from profile A to profile B.
[0020] Further, set the designed flow rate of the low-pressure bleed air auxiliary regulating valve 7 to 1 / 4 of the designed flow rate of the low-pressure bleed air main regulating valve 6, the designed flow rate of the medium-pressure bleed air auxiliary regulating valve 9 to 1 / 4 of the designed flow rate of the medium-pressure bleed air main regulating valve 8, the designed flow rate of the main pipeline auxiliary regulating valve 15 to 1 / 4 of the designed flow rate of the main pipeline main regulating valve 14, and the designed flow rate of the air extraction auxiliary regulating valve 21 to 1 / 4 of the designed flow rate of the air extraction main regulating valve 20.
[0021] Embodiment 2: A control method for a multi-valve group continuously variable Mach number control device, realized relying on the multi-valve group continuously variable Mach number control device described in Embodiment 1, includes the following steps: S1. Through simulation calculation and profile calibration, establish the correspondence between the profile of the flexible wall nozzle 17 and the target Mach number and select the Mach number; S2. Based on the Mach number selected in step S1, determine the target values of the total pressure in the settling chamber and the static pressure in the test section corresponding thereto, judge whether to supply air using the low-pressure air source 1 or the medium-pressure air source 2, and determine the target value of the air extraction pressure or the target value of the low-pressure intake pressure or the target value of the medium-pressure intake pressure corresponding to the selected Mach number according to the test purpose; Further, the calculation formulas for determining the target values of the total pressure in the settling chamber and the static pressure in the test section in step S2 are: ; Wherein, is the Mach number, is the total pressure in the settling chamber, is the static pressure in the test section; S3. Discretize the profile of the flexible wall nozzle 17 according to the selected discrete points of each Mach number, synchronously control the corresponding nozzle profile, total pressure in the settling chamber, static pressure in the test section, low-pressure intake pressure and air extraction pressure, or synchronously control the nozzle profile, total pressure in the settling chamber, static pressure in the test section, medium-pressure intake pressure and air extraction pressure. When the interval between each Mach number in the Mach number discrete points does not meet the requirements, perform linear interpolation between points to construct a parameter correspondence table for each variable during the continuous variable Mach number process, and perform real-time control on a multi-valve group continuously variable Mach number control device.
[0022] Further, in step S3, an incremental PI closed-loop control method is used to synchronously control the target pressures of the low-pressure bleed auxiliary regulating valve 7, the low-pressure bleed main regulating valve 6, the medium-pressure bleed auxiliary regulating valve 9, the medium-pressure bleed main regulating valve 8, the main pipeline auxiliary regulating valve 15, the main pipeline main regulating valve 14, the extraction auxiliary regulating valve 21, and the extraction main regulating valve 20.
[0023] Taking the use of the low-pressure gas source 1 and simultaneously using each main regulating valve as an example, its calculation method is as follows: ; Wherein, , , are respectively the valve position control increments of the low-pressure bleed main regulating valve 6, the main pipeline main regulating valve 14, and the extraction main regulating valve 20 at the k-th moment, , , are respectively the proportional control coefficients of the low-pressure bleed main regulating valve 6, the main pipeline main regulating valve 14, and the extraction main regulating valve 20, , , are respectively the integral control coefficients of the low-pressure bleed main regulating valve 6, the main pipeline main regulating valve 14, and the extraction main regulating valve 20, and are respectively the real-time readings and the target value of the low-pressure pressure sensor 29 at the k-th moment and the (k - 1)-th moment, and are respectively the real-time readings and the target value of the total pressure sensor 31 in the stable section at the k-th moment and the (k - 1)-th moment, and are respectively the real-time readings of the extraction pressure sensor 33 at the k-th moment and the (k - 1)-th moment and the deviation value from the target value; Further, the specific implementation method of step S3 includes the following steps: S3.1. Close the low-pressure intake stop valve 4, the medium-pressure intake stop valve 5, the low-pressure bleed main regulating valve 6, the low-pressure bleed auxiliary regulating valve 7, the medium-pressure bleed main regulating valve 8, the medium-pressure bleed auxiliary regulating valve 9, the low-pressure stop valve 10, the medium-pressure stop valve 11, the main pipeline intake side stop valve 13, the main pipeline main regulating valve 14, the main pipeline auxiliary regulating valve 15, the main pipeline extraction side stop valve 19, the extraction main regulating valve 20, the extraction auxiliary regulating valve 21, the extraction stop valve 22, the air supply regulating valve 23, the air supply stop valve 24, and the exhaust stop valve 25, open the bleed stop valve 12, and keep the nozzle profile at the initial profile ; S3.2. Determine whether to supply gas using the low-pressure gas source 1 or the medium-pressure gas source 2 based on step S2, and perform the regulation and control of the low-pressure target pressure or the medium-pressure target pressure; The method for regulating and controlling the low-pressure target pressure is to open the low-pressure intake shut-off valve 4. After the reading of the low-pressure pressure sensor 29 remains stable, open the low-pressure main bleed control valve 6 for closed-loop control. When the real-time reading of the low-pressure pressure sensor 29 and the initial target value of the low-pressure pressure sensor 29 satisfy the relational expression (1), keep the valve position of the low-pressure main bleed control valve 6 unchanged, and start the closed-loop control of the low-pressure auxiliary bleed control valve 7. The expression is: (1) where is the error band of the low-pressure intake pressure; The method for regulating and controlling the medium-pressure target pressure is to open the medium-pressure intake shut-off valve 5. After the reading of the medium-pressure pressure sensor 30 remains stable, open the medium-pressure main bleed control valve 8 for closed-loop control. When the real-time reading of the medium-pressure pressure sensor 30 and the initial target value of the medium-pressure pressure sensor 30 satisfy the relational expression (2), keep the valve position of the medium-pressure main bleed control valve 8 unchanged, and start the closed-loop control of the medium-pressure auxiliary bleed control valve 9. The expression is: (2) where is the error band of the medium-pressure intake pressure; S3.3. Based on the regulation and control of the low-pressure target pressure or the medium-pressure target pressure in step S3.2, open the low-pressure shut-off valve 10 or the medium-pressure shut-off valve 11, close the bleed shut-off valve 12, open the main pipeline intake side shut-off valve 13, and open the main pipeline main control valve 14 for closed-loop control. When the real-time reading of the total pressure sensor 31 in the stable section and the initial target value of the total pressure sensor 31 in the stable section satisfy the relational expression (3), keep the valve position of the main pipeline main control valve 14 unchanged, and start the closed-loop control of the main pipeline auxiliary control valve 15. The expression is: (3) where is the error band of the total pressure in the voltage stabilization section; S3.4. Open the extraction shut-off valve 22 and the air supply shut-off valve 24. If the real-time reading of the extraction pressure sensor 33 and the initial target value of the extraction pressure sensor 33 satisfy the relational expression (4), then open the extraction main control valve 20 for closed-loop control. When the real-time reading of the extraction pressure sensor 33 With the initial target value of the air extraction pressure sensor 33 When the relational expression (5) is satisfied, keep the valve position of the main air extraction regulating valve 20 unchanged, start the closed-loop control of the auxiliary air extraction regulating valve 21. If the situation of relational expression (6) occurs, keep the valve positions of the main air extraction regulating valve 20 and the auxiliary air extraction regulating valve 21 unchanged, and start the closed-loop control of the air supplement regulating valve 23. The expression is as follows: (4) (5) (6) Wherein, is the error band of the air extraction pressure; After steps S3.1 to S3.4, the initial Mach number has been formed in the test section at this time ; S3.5. Synchronously control the nozzle profile, the main regulating valve 14 of the main pipeline, the main low-pressure air release regulating valve 6, the main air extraction regulating valve 20 or the air supplement regulating valve 23 by the central controller 34, so that the nozzle profile, the total pressure of the stable section, the low-pressure air release pressure, and the air extraction pressure reach the target values corresponding to the steps simultaneously, , , , . At this time, the Mach number is formed. Repeatedly execute step S3.5 until all Mach number sequences are completed. Among them, is the nozzle profile at the Mach number , is the total pressure of the stable section at the Mach number , is the target value of the low-pressure pressure sensor at the Mach number , is the target value of the air extraction pressure sensor at the Mach number .
[0024] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the said element.
[0025] Although the present application has been described above with reference to specific embodiments, various improvements can be made thereto and components thereof can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the features in the specific embodiments disclosed in the present application can be combined with each other in any manner, and the exhaustive description of these combinations is not given in this specification only for the sake of saving space and resources. Therefore, the present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A multi-valve group continuous variable Mach number control device, characterized in that, It includes a low-pressure gas source (1), the low-pressure gas source (1) is connected to a low-pressure intake shut-off valve (4), the low-pressure intake shut-off valve (4) is connected to a main low-pressure gas release regulating valve (6), an auxiliary low-pressure gas release regulating valve (7) and a low-pressure shut-off valve (10), the main low-pressure gas release regulating valve (6) and the auxiliary low-pressure gas release regulating valve (7) are connected to a gas release tower (3), a medium-pressure gas source (2) is connected to a medium-pressure intake shut-off valve (5), the medium-pressure intake shut-off valve (5) is connected to a main medium-pressure gas release regulating valve (8), an auxiliary medium-pressure gas release regulating valve (9) and a medium-pressure shut-off valve (11), the main medium-pressure gas release regulating valve (8) and the auxiliary medium-pressure gas release regulating valve (9) are connected to the gas release tower (3), a gas release shut-off valve (12) is connected to the gas release tower (3), a main pipeline intake-side shut-off valve (13) is connected to the low-pressure shut-off valve (10), the medium-pressure shut-off valve (11), the gas release shut-off valve (12), a main pipeline main regulating valve (14) and a main pipeline auxiliary regulating valve (15), the main pipeline main regulating valve (14) and the main pipeline auxiliary regulating valve (15) are connected to a stabilization section (16), the stabilization section (16), a flexible-wall nozzle (17), a test section (18), and a main pipeline extraction-side shut-off valve (19) are connected in sequence, the main pipeline extraction-side shut-off valve (19) is connected to a main extraction regulating valve (20), an auxiliary extraction regulating valve (21), a gas supply regulating valve (23), and an exhaust shut-off valve (25), the exhaust shut-off valve (25) is connected to an exhaust tower (26), the gas supply regulating valve (23), a gas supply shut-off valve (24), and a gas supply tower (27) are connected in sequence, the main extraction regulating valve (20) and the auxiliary extraction regulating valve (21) are connected to an extraction shut-off valve (22), and the extraction shut-off valve (22) is connected to an extraction device (28); A low-pressure pressure sensor (29) is installed on the pipeline between the low-pressure intake shut-off valve (4) and the low-pressure shut-off valve (10), a medium-pressure pressure sensor (30) is installed on the pipeline between the medium-pressure intake shut-off valve (5) and the medium-pressure shut-off valve (11), a total pressure sensor for the stabilization section (31) is installed in the stabilization section (16), a static pressure sensor for the test section (32) is installed in the test section (18), and a extraction pressure sensor (33) is installed on the connecting pipeline of the main pipeline extraction-side shut-off valve (19) with the main extraction regulating valve (20), the auxiliary extraction regulating valve (21), the gas supply regulating valve (23), and the exhaust shut-off valve (25); The central controller (34) controls and regulates all valves based on the pressure data collected by the low-pressure pressure sensor (29), the medium-pressure pressure sensor (30), the total pressure sensor for the stabilization section (31), the static pressure sensor for the test section (32), and the extraction pressure sensor (33).
2. The multi-valve group continuous variable Mach number control device according to claim 1, characterized in that, The flexible wall nozzle (17) is designed to be symmetric up and down. The upper flexible wall group (101) and the lower flexible wall group (102) are respectively installed on the upper wall (103) and the lower wall (104) of the nozzle. The upper flexible wall group (101) and the lower flexible wall group (102) each include a number of action units (105) and flexible wall plates (109) arranged at equal intervals. Each action unit (105) consists of a motor (106), a reducer (107) and a lift (108). The end of the lift (108) of each action unit (105) is connected to the flexible wall plate (109). The nozzle controller (110) is connected to each action unit (105) through the EtherCAT real-time bus.
3. The multi-valve group continuous variable Mach number control device according to claim 2, characterized in that, During a single profile movement, the nozzle controller (110) controls all the action units (105) of the upper flexible wall group (101) and the lower flexible wall group (102) to move synchronously, so that the flexible wall plate (109) moves from profile A to profile B.
4. A multi-valve group continuous variable Mach number control device according to claim 3, characterized in that, Set the design flow rate of the low-pressure bleed auxiliary regulating valve (7) to 1 / 4 of the design flow rate of the low-pressure bleed main regulating valve (6), the design flow rate of the medium-pressure bleed auxiliary regulating valve (9) to 1 / 4 of the design flow rate of the medium-pressure bleed main regulating valve (8), the design flow rate of the main pipeline auxiliary regulating valve (15) to 1 / 4 of the design flow rate of the main pipeline main regulating valve (14), and the design flow rate of the extraction auxiliary regulating valve (21) to 1 / 4 of the design flow rate of the extraction main regulating valve (20).
5. A control method for a multi-valve group continuous variable Mach number control device, which is realized based on the multi-valve group continuous variable Mach number control device described in any one of claims 1-4, and is characterized in that, It includes the following steps: S1. Through simulation calculation and profile calibration, establish the corresponding relationship between the profile of the flexible wall nozzle (17) and the target Mach number, and select the Mach number. S2. Based on the Mach number selected in step S1, determine the target values of the total pressure in the stable section and the static pressure in the test section corresponding thereto, judge whether to supply air using the low-pressure air source (1) or the medium-pressure air source (2), and determine the target value of the extraction pressure or the target value of the low-pressure inlet pressure or the target value of the medium-pressure inlet pressure corresponding to the selected Mach number according to the test purpose. S3. Discretize the profile of the flexible wall nozzle (17) according to each selected Mach number discrete point, synchronously control the corresponding nozzle profile, total pressure in the stable section, static pressure in the test section, low-pressure inlet pressure and extraction pressure, or synchronously control the nozzle profile, total pressure in the stable section, static pressure in the test section, medium-pressure inlet pressure and extraction pressure. When the interval between each Mach number in the Mach number discrete points does not meet the requirements, linear interpolation is performed between points to construct a parameter correspondence table for each variable in the continuous variable Mach number process, and real-time control is performed on a multi-valve group continuous variable Mach number control device.
6. The control method of a multi-valve group continuous variable Mach number control device according to claim 5, characterized in that The calculation formulas for determining the target values of the total pressure in the stable section and the static pressure in the test section in step S2 are: ； Among them, is the Mach number, is the total pressure in the settling chamber, is the static pressure in the test section.
7. The control method of a multi-valve group continuous variable Mach number control device according to claim 6, characterized in that, In step S3, the incremental PI closed-loop control method is used to synchronously control the target pressures of the low-pressure bleed auxiliary regulating valve (7), the low-pressure bleed main regulating valve (6), the medium-pressure bleed auxiliary regulating valve (9), the medium-pressure bleed main regulating valve (8), the main pipeline auxiliary regulating valve (15), the main pipeline main regulating valve (14), the extraction auxiliary regulating valve (21), and the extraction main regulating valve (20).
8. The control method of a multi-valve group continuous variable Mach number control device according to claim 7, characterized in that, The specific implementation method of step S3 includes the following steps: S3.
1. Close the low-pressure intake stop valve (4), medium-pressure intake stop valve (5), low-pressure bleed main regulating valve (6), low-pressure bleed auxiliary regulating valve (7), medium-pressure bleed main regulating valve (8), medium-pressure bleed auxiliary regulating valve (9), low-pressure stop valve (10), medium-pressure stop valve (11), main pipeline intake side stop valve (13), main pipeline main regulating valve (14), main pipeline auxiliary regulating valve (15), main pipeline extraction side stop valve (19), extraction main regulating valve (20), extraction auxiliary regulating valve (21), extraction stop valve (22), air supply regulating valve (23), air supply stop valve (24), exhaust stop valve (25), open the bleed stop valve (12), and keep the nozzle profile at the initial profile ; S3.
2. Determine whether to supply gas using the low-pressure gas source (1) or the medium-pressure gas source (2) based on the step S2, and perform the adjustment control of the low-pressure target pressure or the adjustment control of the medium-pressure target pressure; The adjustment and control method for the low-pressure target pressure is to open the low-pressure intake shut-off valve (4). After the reading of the low-pressure pressure sensor (29) remains stable, open the main low-pressure bleed regulating valve (6) for closed-loop control. When the real-time reading of the low-pressure pressure sensor (29) and the initial target value of the low-pressure pressure sensor (29) meet the relationship formula (1), keep the valve position of the main low-pressure bleed regulating valve (6) unchanged, and start the auxiliary low-pressure bleed regulating valve (7) for closed-loop control. The expression is: (1) Among them, is the error band of the low-pressure intake pressure; The adjustment and control method for the medium-pressure target pressure is to open the medium-pressure intake cut-off valve (5). After the reading of the medium-pressure pressure sensor (30) remains stable, open the main medium-pressure gas release regulating valve (8) for closed-loop control. When the real-time reading of the medium-pressure pressure sensor (30) and the initial target value of the medium-pressure pressure sensor (30) satisfy the relational expression (2), keep the valve position of the main medium-pressure gas release regulating valve (8) unchanged, and start the auxiliary medium-pressure gas release regulating valve (9) for closed-loop control. The expression is: (2) Among them, is the error band of the medium-pressure intake pressure; S3.
3. Based on the adjustment control of the low-pressure target pressure or the adjustment control of the medium-pressure target pressure in step S3.2, open the low-pressure stop valve (10) or the medium-pressure stop valve (11), close the bleed stop valve (12), open the main pipeline intake side stop valve (13), open the main pipeline main regulating valve (14) for closed-loop control, and read the real-time value of the total pressure sensor (31) in the stable section and the initial target value of the total pressure sensor (31) in the stable section When the relation formula (3) is satisfied, keep the valve position of the main pipeline main regulating valve (14) unchanged, start the main pipeline auxiliary regulating valve (15) for closed-loop control, and the expression is: (3) Among them, is the error band of the total pressure in the voltage stabilization section; S3.
4. Open the air extraction stop valve (22) and the air make-up stop valve (24). If the real-time reading of the air extraction pressure sensor (33) and the initial target value of the air extraction pressure sensor (33) meet the relation formula (4), then open the main air extraction regulating valve (20) for closed-loop control. When the real-time reading of the air extraction pressure sensor (33) and the initial target value of the air extraction pressure sensor (33) meet the relation formula (5), keep the valve position of the main air extraction regulating valve (20) unchanged, start the auxiliary air extraction regulating valve (21) for closed-loop control. If the situation of relation formula (6) occurs, then keep the valve positions of the main air extraction regulating valve (20) and the auxiliary air extraction regulating valve (21) unchanged, and start the air make-up regulating valve (23) for closed-loop control. The expressions are as follows: (4) (5) (6) Among them, is the error band of the extraction pressure; After steps S3.1 to S3.4, the test section has formed an initial Mach number at this time ; S3.
5. The nozzle profile, the main regulating valve (14) of the main pipeline, the main regulating valve (6) of the low-pressure bleed air, the main regulating valve (20) of the air extraction, or the air supply regulating valve (23) are synchronously controlled by the central controller (34) so that the nozzle profile, the total pressure of the stable section, the low-pressure bleed air pressure, and the air extraction pressure reach the target values corresponding to the steps , , , , and at this time, a Mach number is formed. Step S3.5 is repeatedly executed until all Mach number sequences are completed, where is the nozzle profile at the Mach number , is the total pressure of the stable section at the Mach number , is the target value of the low-pressure pressure sensor at the Mach number , and is the target value of the air extraction pressure sensor at the Mach number .
Citation Information
Patent Citations
Mach number controller in wind tunnel
CN101887267A
Continuous transonic wind tunnel flutter test system and method
CN118794645A