A speed control system and method for testing a dual-shaft compressor of an aircraft engine

Abstract

The present application belongs to the technical field of dual-axis compressor testing of aircraft engines, and specifically relates to a speed control system and method for dual-axis compressor testing of aircraft engines. The system is designed to be able to switch between the speed control mode of the configuration interface and the speed control mode of the electronic throttle lever by using a speed control mode switching button, and is also designed with speed control mode switching control logic to ensure safe and disturbance-free switching between the speed control mode of the configuration interface and the speed control mode of the electronic throttle lever. In addition, the system is designed to be able to switch between the speed control mode and the speed control mode by using a speed control / linkage control switching button, thereby realizing separate control of the speeds of the inner and outer shafts, as well as dual-axis matching and linkage control, which well meets the requirements of dual-axis compressor testing.

Description

Technical Field

[0001] The present application belongs to the technical field of aero-engine dual-shaft compressor testing, and specifically relates to a speed control system and method for aero-engine dual-shaft compressor testing. Background Art

[0002] The compressor is an important component of an aircraft engine, and compressor testing involves the regulation of compressor speed.

[0003] In compressor tests, it is usually necessary to switch between two speed control modes, the configuration interface and the electronic throttle lever, according to different test conditions to control the compressor speed. In the configuration interface speed control mode, the speed is controlled by inputting the speed to be controlled on the interface. It has high control accuracy, but can achieve precise control of the speed. However, it requires manual mouse clicks for operation, and the control speed is slow. In the electronic throttle lever speed control mode, the speed is controlled by pushing the electronic throttle lever. It is easy to operate, has a fast control speed, and can achieve rapid control of the speed, but has low control accuracy.

[0004] In the past, compressors were single-shaft compressors. With the development of technology, dual-shaft compressors have begun to be used in aircraft engines. For dual-shaft compressor tests, it is necessary to control the speeds of both the inner and outer shafts, and it is necessary to have the ability to control the dual shafts in a coordinated manner. The previous single-shaft compressor speed control method is difficult to apply well, and it is necessary to ensure the safe and disturbance-free switching of the two speed control modes of the configuration interface and the electronic throttle lever. In view of this, this application is proposed. Summary of the Invention

[0005] The purpose of this application is to provide an aircraft engine dual-axis compressor test speed control system and method, so as to realize the control of the speeds of the inner and outer shafts in the dual-axis compressor test, and to ensure the safe and disturbance-free switching of the two speed control modes of the configuration interface and the electronic throttle lever.

[0006] The technical solution of this application is:

[0007] On the one hand, a speed control system for a dual-shaft compressor test of an aircraft engine is provided, characterized in that it includes an industrial computer, a switch, an inner-shaft electronic throttle lever, an outer-shaft electronic throttle lever, a PLC controller, an inner-shaft frequency converter, and an outer-shaft frequency converter;

[0008] The industrial computer is connected to the switch, the inner axis electronic throttle lever and the outer axis electronic throttle lever are connected to the PLC controller respectively, the PLC controller is connected to the switch, the switch is connected to the inner axis frequency converter and the outer axis frequency converter respectively, the inner axis frequency converter and the outer axis frequency converter are connected to the drive motors of the inner axis and the outer axis respectively;

[0009] The industrial computer is equipped with a speed control mode switch button to switch between the configuration interface speed control mode and the electronic throttle lever speed control mode;

[0010] In the speed control mode of the configuration interface, the control speed of the inner and outer shafts can be input through the industrial computer interface. The industrial computer transmits the corresponding control signal to the inner and outer shaft inverters through the switch, driving the drive motors of the inner and outer shafts to rotate, thereby realizing the speed control of the inner and outer shafts.

[0011] In the electronic throttle lever speed control mode, the speed control of the inner and outer shafts can be input to the PLC controller by pushing the inner and outer shaft electronic throttle levers. The PLC controller transmits the corresponding control signal to the inner and outer shaft frequency converters through the switch, driving the drive motors of the inner and outer shafts to rotate, thereby realizing the speed control of the inner and outer shafts.

[0012] The industrial computer is equipped with speed control mode switching control logic, including configuration interface - electronic throttle lever speed control mode switching control logic, electronic throttle lever - configuration interface speed control mode switching control logic;

[0013] The control logic for switching the electronic throttle lever speed control mode in the configuration interface is as follows: in the speed control mode on the configuration interface, when the speed control mode switch button is used to switch to the electronic throttle lever speed control mode, the controller determines whether the difference between the control speeds of the inner and outer axes input to the PLC controller by the inner and outer axis electronic throttle levers and their actual speeds is less than the safe and undisturbed switching control threshold. If this difference is less than the safe and undisturbed switching control threshold, the controller enters the electronic throttle lever speed control mode.

[0014] The electronic throttle stick-configuration interface speed control mode switching control logic is as follows: in the electronic throttle stick speed control mode, when the speed control mode switch button is controlled to switch to the configuration interface speed control mode, it is determined whether the difference between the control speed of the inner and outer axes input on the industrial computer interface and the actual speed of the inner and outer axes is less than the safe and undisturbed switching control threshold. If the difference is less than the safe and undisturbed switching control threshold, the configuration interface speed control mode is entered.

[0015] Optionally, in the above-mentioned aircraft engine dual-shaft compressor test speed control system, the safe and disturbance-free switching control threshold is 10r / min.

[0016] Optionally, in the above-mentioned aircraft engine dual-shaft compressor test speed control system, a speed separate / linked control switching button is provided on the industrial computer for switching between the speed separate control mode and the speed linked control mode;

[0017] In the speed distribution control mode, the speed of the inner shaft and outer shaft can be controlled separately;

[0018] In the speed linkage control mode, the speed of the outer shaft can be controlled, and the speed of the inner shaft is automatically controlled according to the speed matching rule based on the speed of the outer shaft.

[0019] Optionally, in the above-mentioned aircraft engine dual-shaft compressor test speed control system, the speed matching law is built into the industrial computer, and the speed matching law divides the outer shaft speed into multiple gears, and each gear of the outer shaft speed corresponds to a matching inner shaft speed.

[0020] Optionally, in the above-mentioned aircraft engine dual-shaft compressor test speed control system, in the speed matching rule, the corresponding inner shaft speed between the two outer shaft speeds is determined by interpolation.

[0021] Optionally, in the above-mentioned aircraft engine dual-shaft compressor test speed control system, in the speed matching rule, the outer shaft speed corresponding to the lowest gear is 300r / min.

[0022] Optionally, in the above-mentioned aircraft engine dual-axis compressor test speed control system, an import and export algorithm for speed matching law data is developed based on WinCC on an industrial computer, which can write the speed matching law data into a file storage address and configure data import and export buttons. By clicking the export button, the speed matching law data can be generated into a corresponding Excel file output, and by clicking the import button, the speed matching law data corresponding to the Excel file can be imported into the file storage address.

[0023] On the other hand, a method for controlling the speed of a dual-shaft compressor test of an aircraft engine is provided, which is implemented based on the aforementioned dual-shaft compressor test speed control system of an aircraft engine, and comprises:

[0024] Switch the speed split / linkage control switch button to the speed split control mode, and control the speed of the inner shaft and outer shaft separately, so that the inner shaft and outer shaft can start at the minimum speed requirement;

[0025] The speed of the outer shaft is adjusted to the speed corresponding to the lowest gear in the speed matching rule. The speed split / linkage control switch button is switched to the speed linkage control mode. The speed of the outer shaft is adjusted to conduct a dual-shaft compressor test.

[0026] After the dual-shaft compressor test is completed, the speed of the outer shaft is adjusted to the outer shaft speed corresponding to the lowest gear in the speed matching rule, and the speed split / linkage control switch button is switched to the speed split control mode. The speeds of the inner and outer shafts are adjusted separately to stop the inner and outer shafts from rotating and stop the vehicle.

[0027] This application has at least the following beneficial technical effects:

[0028] The aircraft engine dual-axis compressor test speed control system and method disclosed in the above embodiment are designed to be able to switch the configuration interface speed control mode and the electronic throttle lever speed control mode with a speed control mode switching button, and are designed with speed control mode switching control logic to ensure safe and disturbance-free switching between the configuration interface speed control mode and the electronic throttle lever speed control mode. In addition, the design is able to switch the speed split control mode and the speed linkage control mode with a speed split / linkage control switching button to achieve separate control of the inner and outer shaft speeds, as well as dual-axis matching linkage control, which well meets the needs of dual-axis compressor testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of a speed control system for a dual-shaft compressor test of an aircraft engine provided by an embodiment of the present application;

[0030] Figure 2 This is a schematic diagram of the control logic for switching the electronic throttle lever speed control mode according to the configuration interface provided in an embodiment of the present application;

[0031] Figure 3 This is a schematic diagram of the electronic throttle lever-configuration interface speed control mode switching control logic provided in an embodiment of the present application;

[0032] Figure 4 Schematic diagram of the speed matching law data import and export algorithm provided in an embodiment of the present application;

[0033] Figure 5 Schematic diagram of a method for controlling the speed of a dual-shaft compressor test for an aircraft engine provided in an embodiment of the present application;

[0034] in:

[0035] 1-Industrial computer; 2-Switch; 3-Internal axis electronic throttle lever; 4-External axis electronic throttle lever; 5-PLC controller; 6-Internal axis frequency converter; 7-External axis frequency converter.

[0036] In order to better illustrate this embodiment, some contents of the drawings may be omitted, enlarged or reduced, which is only used for illustrative purposes and should not be construed as limiting the present application. DETAILED DESCRIPTION

[0037] To make the technical solution and its advantages of this application more clear, the technical solution of this application will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only some of the embodiments of this application and are only used to explain this application, not to limit this application. It should be noted that for ease of description, only the parts relevant to this application are shown in the accompanying drawings, and other relevant parts can refer to the general design.

[0038] In addition, unless otherwise defined, the technical or scientific terms used in the description of this application shall have the ordinary meanings understood by those skilled in the art to which this application belongs. The term "include" as used in the description of this application means that the concepts preceding the term include the concepts listed after the term and their equivalents, without excluding other related concepts.

[0039] In addition, the words used in the description of this application to indicate orientation are only used to indicate relative directions or positional relationships. When the absolute position of the object being described changes, its relative positional relationship may also change accordingly. It should also be noted that, unless otherwise clearly specified and limited, the words "installation", "connection" and similar words used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand their specific meanings in this application based on the specific circumstances.

[0040] A speed control system for a dual-shaft compressor test of an aircraft engine, such as Figure 1 As shown, there are an industrial computer 1, a switch 2, an inner-axis electronic throttle lever 3, an outer-axis electronic throttle lever 4, a PLC controller 5, an inner-axis frequency converter 6, and an outer-axis frequency converter 7.

[0041] The industrial computer 1 is connected to the switch 2, the inner axis electronic throttle lever 3 and the outer axis electronic throttle lever 4 are respectively connected to the PLC controller 5, the PLC controller 5 is connected to the switch 2, the switch 2 is respectively connected to the inner axis frequency converter 6 and the outer axis frequency converter 7, the inner axis frequency converter 6 and the outer axis frequency converter 7 are respectively connected to the drive motors of the inner axis and the outer axis.

[0042] The industrial computer 1 is provided with a speed control mode switching button for switching between the configuration interface speed control mode and the electronic throttle lever speed control mode.

[0043] In the speed control mode of the configuration interface, the control speed of the inner and outer shafts can be input through the interface of the industrial computer 1. The industrial computer 1 transmits the corresponding control signal to the inner shaft inverter 6 and the outer shaft inverter 7 through the switch 2, driving the drive motors of the inner and outer shafts to rotate, thereby realizing the control of the speed of the inner and outer shafts.

[0044] In the electronic throttle lever speed control mode, the control speed of the inner and outer shafts can be input to the PLC controller 5 by pushing the inner shaft electronic throttle lever 3 and the outer shaft electronic throttle lever 4. The PLC controller 5 transmits the corresponding control signal to the inner shaft frequency converter 6 and the outer shaft frequency converter 7 through the switch 2, driving the drive motors of the inner and outer shafts to rotate, thereby realizing the control of the speed of the inner and outer shafts.

[0045] In order to ensure safe and disturbance-free switching between the configuration interface speed control mode and the electronic throttle lever speed control mode, a speed control mode switching control logic is set in the design industrial computer 1, including the configuration interface-electronic throttle lever speed control mode switching control logic and the electronic throttle lever-configuration interface speed control mode switching control logic.

[0046] The control logic for switching the electronic throttle lever speed control mode in the configuration interface is as follows: in the speed control mode of the configuration interface, when the speed control mode switch button is controlled to switch to the electronic throttle lever speed control mode, it is determined whether the difference between the control speed of the inner axis and outer axis input to the PLC controller 5 by the inner axis electronic throttle lever 3 and the outer axis electronic throttle lever 4 and the actual speed of the inner axis and outer axis is less than the safe and non-disturbance switching control threshold. Only when it is less than the safe and non-disturbance switching control threshold will the electronic throttle lever speed control mode be entered. For example, Figure 2 shown.

[0047] The electronic throttle stick-configuration interface speed control mode switching control logic is as follows: in the electronic throttle stick speed control mode, when the speed control mode switch button is controlled to switch to the configuration interface speed control mode, it is judged whether the difference between the control speed of the inner and outer axes input on the industrial computer 1 interface and the actual speed of the inner and outer axes is less than the safe and non-disturbance switching control threshold. Only when it is less than the safe and non-disturbance switching control threshold will the configuration interface speed control mode be entered. Figure 3 shown.

[0048] The safe and disturbance-free switching control threshold is usually 10r / min.

[0049] In order to realize the separate control of the inner and outer shaft speeds, as well as the dual-axis matching linkage control, a speed separation / linkage control switching button is provided on the industrial computer 1 to switch between the speed separation control mode and the speed linkage control mode.

[0050] In the speed distribution control mode, the speed of the inner shaft and the outer shaft can be controlled separately, that is, the speed of the inner shaft and the outer shaft can be controlled separately in the configuration interface speed control mode or the electronic throttle stick speed control mode. The speed of the inner shaft and the outer shaft can be controlled separately without affecting each other.

[0051] In the speed linkage control mode, the speed of the outer shaft can be controlled, and the speed of the inner shaft is automatically controlled according to the speed matching law based on the speed of the outer shaft. That is, the outer shaft is the active shaft and the inner shaft is the driven shaft. The speed of the outer shaft can only be controlled in the configuration interface speed control mode or the electronic throttle lever speed control mode. The inner shaft rotates according to the speed of the outer shaft according to the speed matching law.

[0052] The speed matching rule is built into the industrial computer 1. The speed matching rule divides the external shaft speed into multiple gears. Each gear of the external shaft speed corresponds to an internal shaft speed. The corresponding matching relationship and its interval range can be determined according to the matching ratio and speed range required by the test. The internal shaft speed that needs to be matched between two gears of the external shaft speed can be determined by interpolation.

[0053] The industrial computer 1 can develop an import and export algorithm for the speed matching law data based on WinCC, and can write the speed matching law data into the file storage address, and configure the data import and export buttons. Click the export button to generate the corresponding Excel file output of the speed matching law data. Click the import button to import the speed matching law data corresponding to the Excel file into the file storage address for experimental use, such as Figure 4 shown.

[0054] The aero-engine dual-shaft compressor test speed control system disclosed in the above embodiment can control the speed of the inner shaft and the outer shaft by referring to the following method during the test, such as Figure 5 As shown:

[0055] Switch the speed split / linkage control switch button to the speed split control mode, and control the speed of the inner shaft and outer shaft separately, and control the inner shaft and outer shaft to start at the minimum speed requirement. The minimum speed requirement of the inner shaft and outer shaft is usually 500r / min.

[0056] The speed of the outer shaft is adjusted to the speed corresponding to the lowest gear in the speed matching law, usually 300 r / min. The speed split / linkage control switch button is switched to the speed linkage control mode to adjust the speed of the outer shaft. A dual-axis compressor test is conducted to mainly study the high-low pressure matching mechanism.

[0057] After the dual-shaft compressor test is completed, the speed of the outer shaft is adjusted to the outer shaft speed corresponding to the lowest gear in the speed matching rule, and the speed split / linkage control switch button is switched to the speed split control mode. The speeds of the inner and outer shafts are adjusted separately to stop the inner and outer shafts from rotating and stop the vehicle.

[0058] In the aircraft engine dual-axis compressor test speed control system disclosed in the above embodiment, a speed control mode switching button is designed to switch the configuration interface speed control mode and the electronic throttle lever speed control mode, and a speed control mode switching control logic is designed to ensure safe and disturbance-free switching between the configuration interface speed control mode and the electronic throttle lever speed control mode. In addition, the speed split / linkage control switching button is designed to switch the speed split control mode and the speed linkage control mode, thereby realizing separate control of the inner and outer shaft speeds, as well as dual-axis matching linkage control, which well meets the dual-axis compressor test requirements.

[0059] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or replacements to the relevant technical features, and the technical solutions after these changes or replacements will fall within the scope of protection of the present application.

Claims

1. A speed control system for a dual-shaft compressor test of an aircraft engine, characterized in that: It includes an industrial computer (1), a switch (2), an inner-axis electronic throttle lever (3), an outer-axis electronic throttle lever (4), a PLC controller (5), an inner-axis frequency converter (6), and an outer-axis frequency converter (7); The industrial control computer (1) is connected to the switch (2), the inner axis electronic throttle lever (3) and the outer axis electronic throttle lever (4) are respectively connected to the PLC controller (5), the PLC controller (5) is connected to the switch (2), the switch (2) is respectively connected to the inner axis frequency converter (6) and the outer axis frequency converter (7), the inner axis frequency converter (6) and the outer axis frequency converter (7) are respectively connected to the drive motors of the inner axis and the outer axis; The industrial computer (1) is provided with a speed control mode switching button for switching between the configuration interface speed control mode and the electronic throttle lever speed control mode; In the configuration interface speed control mode, the control speed of the inner shaft and the outer shaft can be input through the interface of the industrial control computer (1), and the industrial control computer (1) transmits the corresponding control signal to the inner shaft frequency converter (6) and the outer shaft frequency converter (7) through the switch (2), driving the driving motors of the inner shaft and the outer shaft to rotate, thereby realizing the control of the speed of the inner shaft and the outer shaft; In the electronic throttle lever speed control mode, the control speed of the inner shaft and the outer shaft can be input to the PLC controller (5) by pushing the inner shaft electronic throttle lever (3) and the outer shaft electronic throttle lever (4). The PLC controller (5) transmits the corresponding control signal to the inner shaft frequency converter (6) and the outer shaft frequency converter (7) through the switch (2), driving the driving motors of the inner shaft and the outer shaft to rotate, thereby realizing the control of the speed of the inner shaft and the outer shaft; The industrial control computer (1) is provided with a speed control mode switching control logic, including a configuration interface-electronic throttle lever speed control mode switching control logic and an electronic throttle lever-configuration interface speed control mode switching control logic; The control logic of the switching of the speed control mode of the electronic throttle lever in the configuration interface is as follows: in the speed control mode of the configuration interface, when the speed control mode switching button is switched to the electronic throttle lever speed control mode, it is judged whether the difference between the control speed of the inner axis and the outer axis inputted by the inner axis electronic throttle lever (3) and the outer axis electronic throttle lever (4) to the PLC controller (5) and the actual speed of the inner axis and the outer axis is less than the safe and undisturbed switching control threshold value; if it is less than the safe and undisturbed switching control threshold value, the electronic throttle lever speed control mode is entered; The electronic throttle stick-configuration interface speed control mode switching control logic is as follows: in the electronic throttle stick speed control mode, when the speed control mode switching button is switched to the configuration interface speed control mode, it is judged whether the difference between the control speed of the inner axis and the outer axis inputted from the industrial control computer (1) interface and the actual speed of the inner axis and the outer axis is less than the safe and undisturbed switching control threshold value; if it is less than the safe and undisturbed switching control threshold value, the configuration interface speed control mode is entered.

2. The aircraft engine dual-shaft compressor test speed control system according to claim 1, characterized in that: The safe and disturbance-free switching control threshold is 10r / min.

3. The aircraft engine dual-shaft compressor test speed control system according to claim 2, characterized in that: The industrial control computer (1) is provided with a speed split / linkage control switching button for switching between the speed split control mode and the speed linkage control mode; In the speed distribution control mode, the speed of the inner shaft and outer shaft can be controlled separately; In the speed linkage control mode, the speed of the outer shaft can be controlled, and the speed of the inner shaft is automatically controlled according to the speed matching rule based on the speed of the outer shaft.

4. The aircraft engine dual-shaft compressor test speed control system according to claim 3, characterized in that: The speed matching rule is built into the industrial computer (1). In the speed matching rule, the external shaft speed is divided into multiple gears, and each gear of the external shaft speed is matched with a corresponding internal shaft speed.

5. The aircraft engine dual-shaft compressor test speed control system according to claim 4, characterized in that: In the speed matching rule, the speed of the inner shaft must match the speed of the outer shaft in the two gears, which is determined by interpolation.

6. The aircraft engine dual-shaft compressor test speed control system according to claim 5, characterized in that: In the speed matching rule, the external shaft speed corresponding to the lowest gear is 300r / min.

7. The aircraft engine dual-shaft compressor test speed control system according to claim 6, characterized in that: An import and export algorithm for speed matching law data is developed based on WinCC on an industrial computer (1). The speed matching law data can be written into a file storage address, and data import and export buttons are configured. Clicking the export button can generate a corresponding Excel file output for the speed matching law data. Clicking the import button can import the speed matching law data corresponding to the Excel file into the file storage address.

8. A method for controlling the speed of a dual-shaft compressor test of an aircraft engine, implemented based on the dual-shaft compressor test speed control system of claim 7, characterized in that: include: Switch the speed split / linkage control switch button to the speed split control mode, and control the speed of the inner shaft and outer shaft separately, so that the inner shaft and outer shaft can start at the minimum speed requirement; The speed of the outer shaft is adjusted to the speed corresponding to the lowest gear in the speed matching rule. The speed split / linkage control switch button is switched to the speed linkage control mode. The speed of the outer shaft is adjusted to conduct a dual-shaft compressor test. After the dual-shaft compressor test is completed, the speed of the outer shaft is adjusted to the outer shaft speed corresponding to the lowest gear in the speed matching rule, and the speed split / linkage control switch button is switched to the speed split control mode. The speeds of the inner and outer shafts are adjusted separately to stop the inner and outer shafts from rotating and stop the vehicle.

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