A method and device for controlling the divergent section of a binary vector nozzle

Abstract

The application belongs to the technical field of engine test, and particularly relates to a method and device for controlling an expansion section of a two-dimensional vector nozzle, which is applied to the control of the expansion section when a single-side actuating cylinder linear displacement sensor of the expansion section of the two-dimensional vector nozzle fails in a test run process. The method comprises the following steps: S1, obtaining a test rig pitch direction side force measurement value; S2, controlling the expansion section on the side where the linear displacement sensor does not fail according to an original control plan, and performing closed-loop control on the expansion section on the side where the linear displacement sensor fails according to the pitch direction side force being equal to zero. The engine nozzle outlet area can be controlled according to the original control plan, so that the engine thrust characteristics, infrared radiation characteristics and the like are ensured not to deviate from the design state.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of engine test, and particularly relates to a method and device for controlling an expansion section of a two-dimensional vector nozzle. BACKGROUND

[0002] In the existing design scheme of the two-dimensional vector nozzle, the nozzle is divided into a converging section and an expansion section. The converging section is used to adjust the throat area of the two-dimensional vector nozzle, and the expansion section is used to adjust the outlet area of the two-dimensional vector nozzle.

[0003] The upper and lower adjusting plates of the expansion section are controlled by the actuating cylinders independently and do not interfere with each other. The displacement of the actuating cylinder is fed back by the linear displacement sensor. After the engine is assembled, the actuating cylinder is calibrated to form a one-to-one correspondence between the displacement of the actuating cylinder and the outlet area of the nozzle. When the linear displacement sensor of the single-side expansion section actuating cylinder fails, the actuating cylinder can be controlled, but the displacement of the actuating cylinder cannot be obtained, and the outlet area of the nozzle cannot be obtained through the one-to-one correspondence between the displacement of the actuating cylinder and the outlet area of the nozzle. During the bench test, when the linear displacement sensor of the single-side expansion section actuating cylinder fails, both sides of the expansion section in the existing technical scheme enter the emergency return mode, that is, the actuating cylinder is in the intermediate mechanical position state and cannot be adjusted.

[0004] 1) The outlet area of the engine nozzle cannot be adjusted according to the original control plan, which causes the engine thrust to deviate from the design state and the real thrust characteristics of the engine cannot be obtained.

[0005] 2) Since the size of the outlet area of the nozzle is related to the infrared radiation and other characteristics, the outlet area of the nozzle cannot be adjusted, and the real infrared radiation and other characteristic parameters of the engine cannot be obtained. SUMMARY

[0006] To solve the above problems, the application provides a method and device for controlling an expansion section of a two-dimensional vector nozzle, which solves the problem that the outlet area of the nozzle cannot be adjusted according to the original control plan when the linear displacement sensor of the single-side expansion section fails during the bench test of the two-dimensional vector nozzle.

[0007] The first aspect of the application provides a method for controlling an expansion section of a two-dimensional vector nozzle, which mainly comprises the following steps:

[0008] Step S1: obtaining a bench pitch direction side force measurement value;

[0009] Step S2: controlling the expansion section on the side where the linear displacement sensor does not fail according to the original control plan, and controlling the expansion section on the side where the linear displacement sensor fails according to the closed-loop control that the pitch direction side force is equal to zero.

[0010] Preferably, step S2 further comprises the following steps:

[0011] If the linear displacement sensor of the actuator is faulty, the closed-loop control of the expansion section actuator on the faulty side is cut off, and the closed-loop control of the lateral force in the pitch direction is switched on.

[0012] Preferably, the closed-loop control comprises:

[0013] In step S21, the lateral force deviation is determined according to the lateral force in the pitch direction.

[0014] In step S22, the control current is calculated according to the lateral force deviation.

[0015] In step S23, the control current is output to the electro-hydraulic servo valve for actuator control, so as to control the expansion section actuator on the faulty side and output the lateral force in the pitch direction.

[0016] Preferably, in step S22, the calculation of the control current comprises:

[0017]

[0018] wherein Δ is the lateral force deviation, K p is a proportional control parameter, I 平衡 is a balance current of the electro-hydraulic servo valve, K i is an integral control parameter, and represents an integral element.

[0019] The second aspect of the present application provides a binary vector nozzle expansion section control device, mainly comprising:

[0020] A pitch direction lateral force measurement value acquisition module is configured to acquire a test bench pitch direction lateral force measurement value.

[0021] An expansion section control module is configured to control the expansion section on the side where the linear displacement sensor is not faulty according to the original control plan, and to control the expansion section on the side where the linear displacement sensor is faulty according to the closed-loop control of the lateral force in the pitch direction being equal to zero.

[0022] Preferably, the expansion section control module comprises:

[0023] A switching unit is configured to judge whether the linear displacement sensor of the actuator is faulty. If the linear displacement sensor of the actuator is faulty, the closed-loop control of the expansion section actuator on the faulty side is cut off, and the closed-loop control of the lateral force in the pitch direction is switched on.

[0024] Preferably, the expansion section control module comprises:

[0025] A lateral force deviation calculation unit is configured to determine the lateral force deviation according to the lateral force in the pitch direction.

[0026] A control current calculation unit is configured to calculate the control current according to the lateral force deviation.

[0027] a current output unit for outputting the control current to the ram control electro-hydraulic servo valve to control the ram of the divergent section on the failure side and output the lateral force in the pitch direction.

[0028] Preferably, in the control current calculation unit, the control current I is calculated by the following formula:

[0029]

[0030] wherein, Δ is the lateral force deviation, K p is the proportional control parameter, I 平衡 is the electro-hydraulic servo valve balance current, K i is the integral control parameter, represents the integral link.

[0031] The engine nozzle exit area of the present application can be controlled according to the original control plan to ensure that the engine thrust characteristics, infrared radiation characteristics, etc. do not deviate from the design state. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a flow chart of a preferred embodiment of the divergent section control method of the binary vector nozzle of the present application.

[0033] Figure 2 is a vector deflection schematic diagram of the binary vector nozzle.

[0034] Figure 3 is a closed-loop control schematic diagram based on the lateral force in the pitch direction being equal to zero.

[0035] wherein, 1 - afterburner, 2 - convergent section, 3 - divergent section. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described in more detail below in combination with the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below in combination with the drawings.

[0037] The first aspect of the application provides a method for controlling the divergent section of a two-dimensional vector nozzle, which is applied to the control of the divergent section when the linear displacement sensor of the single-side actuator cylinder of the divergent section of the two-dimensional vector nozzle fails during the bench test, as shown in the figure, which mainly includes: Figure 1

[0038] Step S1, obtaining the lateral force measurement value in the pitch direction of the test bench;

[0039] Step S2, controlling the divergent section on the side where the linear displacement sensor does not fail according to the original control plan, and controlling the divergent section on the side where the linear displacement sensor fails according to the lateral force in the pitch direction being equal to zero.

[0040] Reference Figure 2 The rear end of the afterburner 1 is first connected to the convergent section 2, and then connected to the divergent section 3. The upper and lower divergent sections are individually controlled by the actuator cylinder to deflect. When the divergent sections of the two-dimensional vector nozzle are asymmetrically controlled, the lateral force in the pitch direction is generated. When the upper divergent section deflects more, the upward lateral force is generated. When the divergent sections are symmetrically controlled, the lateral force in the pitch direction is zero.

[0041] Based on the above principle, the lateral force measurement value Fc in the pitch direction of the test bench is input into the engine controller to participate in the engine control. When the linear displacement sensor of the actuator cylinder of the divergent section of the two-dimensional vector nozzle fails on one side, the side where the linear displacement sensor does not fail is controlled according to the original control plan; the side where the linear displacement sensor fails is controlled according to the lateral force in the pitch direction being equal to zero, so as to realize the symmetric control of the upper and lower sides of the divergent section.

[0042] In some optional embodiments, step S2 further includes:

[0043] determining whether the linear displacement sensor of the actuator cylinder fails, if so, cutting off the closed-loop control of the divergent section actuator cylinder on the side where the linear displacement sensor fails, and switching to the closed-loop control of the lateral force in the pitch direction.

[0044] In this embodiment, after the linear displacement sensor of the actuator cylinder fails, the closed-loop control of the actuator cylinder is exited, and the PI closed-loop control of the lateral force Fc in the pitch direction is switched to.

[0045] In some optional embodiments, the closed-loop control includes:

[0046] Step S21, determining the lateral force deviation according to the lateral force in the pitch direction;

[0047] Step S22, calculating the control current according to the lateral force deviation;

[0048] Step S23, outputting the control current to the electro-hydraulic servo valve for actuator cylinder control to control the divergent section actuator cylinder on the side where the linear displacement sensor fails, and outputting the lateral force in the pitch direction. ​

[0049] As shown in FIG. 2, in step S21, the lateral force given value FcDem is first set to 0, a deviation is calculated according to the current lateral force feedback Fc, i.e., Δ = FcDem - Fc, then in step S22, a control current is calculated by a PI control algorithm, in step S23, the control cylinder is controlled by the controller output to the electro-hydraulic servo valve for the control cylinder, and finally the deviation is eliminated so that the lateral force in the pitch direction is 0. Figure 3

[0050] In some optional embodiments, in step S22, calculating the control current comprises:

[0051]

[0052] wherein Δ is the lateral force deviation, Kp is a proportional control parameter, I is the electro-hydraulic servo valve balance current, Ki is an integral control parameter, and Δ represents the integral element. p 平衡 i

[0053] The engine nozzle exit area of the present application can be controlled according to the original control plan to ensure that the engine thrust characteristics, infrared radiation characteristics, etc. do not deviate from the design state.

[0054] The second aspect of the present application provides a two-dimensional vector nozzle expansion section control device corresponding to the above method, mainly comprising:

[0055] A pitch direction lateral force measurement value acquisition module for acquiring a test bench pitch direction lateral force measurement value;

[0056] An expansion section control module for controlling the expansion section on the side of the linear displacement sensor that is not faulty according to the original control plan, and controlling the expansion section on the side of the linear displacement sensor that is faulty according to the closed loop control of the lateral force in the pitch direction being equal to zero.

[0057] In some optional embodiments, the expansion section control module comprises:

[0058] A switching unit for judging whether the linear displacement sensor of the control cylinder is faulty, and if so, cutting off the closed loop control of the expansion section control cylinder on the faulty side and switching to the closed loop control of the lateral force in the pitch direction.

[0059] In some optional embodiments, the expansion section control module comprises:

[0060] A lateral force deviation calculation unit for determining the lateral force deviation according to the lateral force in the pitch direction;

[0061] A control current calculation unit for calculating the control current according to the lateral force deviation;

[0062] ​​​​​A current output unit for outputting the control current to the ram control electro-hydraulic servo valve to control the ram of the expansion section on the failure side and output the lateral force in the pitch direction.

[0063] In some optional embodiments, in the control current calculation unit, the control current I is calculated by the following formula:

[0064]

[0065] wherein Δ is the lateral force deviation, K p is a proportional control parameter, I 平衡 is the electro-hydraulic servo valve balance current, K i is an integral control parameter, represents the integral link.

[0066] Although the present application has been described in detail with general description and specific embodiments above, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application, all belong to the scope of the present application claimed.

Claims

1. A method for controlling the divergent section of a two-dimensional vectoring nozzle, applied to the control of the divergent section when the single-sided actuator cylinder linear displacement sensor of the divergent section of the two-dimensional vectoring nozzle fails during a bench test, characterized in that, The method comprises: Step S1, acquiring a lateral force measurement value in the pitch direction of the test stand; Step S2, controlling the expansion section on the non-faulty side of the linear displacement sensor according to the original control plan, and controlling the expansion section on the faulty side of the linear displacement sensor according to the closed-loop control of the lateral force in the pitch direction being equal to zero; Wherein, step S2 further comprises: Judging whether the linear displacement sensor of the actuator is faulty, if so, cutting off the closed-loop control of the expansion section actuator on the faulty side, and switching to the closed-loop control of the lateral force in the pitch direction; The closed-loop control of the lateral force in the pitch direction comprises: Step S21, determining a lateral force deviation according to the lateral force in the pitch direction; Step S22, calculating a control current according to the lateral force deviation; Step S23, outputting the control current to an electro-hydraulic servo valve for actuator control, so as to control the expansion section actuator on the faulty side and output the lateral force in the pitch direction.

2. The method of claim 1, wherein, In step S22, the calculation of the control current comprises: ； wherein, Δ is the lateral force deviation, is a proportional control parameter, is the electro-hydraulic servo valve balance current, is an integral control parameter, denotes an integral element.

3. A binary vector nozzle divergent section control device characterized by, The device for implementing the binary vector nozzle expansion section control method according to claim 1 comprises: A lateral force measurement value acquisition module for acquiring a lateral force measurement value in the pitch direction of the test stand; An expansion section control module for controlling the expansion section on the non-faulty side of the linear displacement sensor according to the original control plan, and controlling the expansion section on the faulty side of the linear displacement sensor according to the closed-loop control of the lateral force in the pitch direction being equal to zero.

4. The binary vectoring nozzle divergent section control apparatus of claim 3, wherein, The expansion section control module comprises: A switching unit for judging whether the linear displacement sensor of the actuator is faulty, if so, cutting off the closed-loop control of the expansion section actuator on the faulty side, and switching to the closed-loop control of the lateral force in the pitch direction.

5. The binary vectoring nozzle divergent section control apparatus of claim 3, wherein, The expansion section control module comprises: A lateral force deviation calculation unit for determining a lateral force deviation according to the lateral force in the pitch direction; A control current calculation unit for calculating a control current according to the lateral force deviation; A current output unit for outputting the control current to an electro-hydraulic servo valve for actuator control, so as to control the expansion section actuator on the faulty side and output the lateral force in the pitch direction.

6. The binary vectoring nozzle divergent section control apparatus of claim 5, wherein, In the control current calculation unit, the control current I is calculated by the following formula: ； wherein Δ is the lateral force deviation, is a proportional control parameter, is the electro-hydraulic servo valve balance current, is an integral control parameter, denotes an integral element.

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