CN110471461B - Wind tunnel model attack angle control device and control method thereof - Google Patents
Wind tunnel model attack angle control device and control method thereof Download PDFInfo
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- CN110471461B CN110471461B CN201910799162.9A CN201910799162A CN110471461B CN 110471461 B CN110471461 B CN 110471461B CN 201910799162 A CN201910799162 A CN 201910799162A CN 110471461 B CN110471461 B CN 110471461B
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- G01—MEASURING; TESTING
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- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
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Abstract
The invention discloses a wind tunnel model attack angle control device and a control method thereof, wherein the wind tunnel model attack angle control device comprises a main controller, a control shaft I and a control shaft II are connected with the main controller in a bus mode; the control shaft I is connected with the electro-hydraulic servo valve I, and the control shaft II is connected with the electro-hydraulic servo valve II; the servo oil cylinder is respectively connected with an electro-hydraulic servo valve I and an electro-hydraulic servo valve II, and the servo oil cylinder is arranged on the angle-of-attack mechanism; the displacement sensor is used for measuring the attack angle of the attack angle mechanism, is arranged in the servo oil cylinder or on the attack angle mechanism, and is connected with the main controller through a cable; the main controller drives the two electro-hydraulic servo valves to act, so that the servo oil cylinders are driven to act, the angle of attack mechanism is driven to operate, the change of the angle of attack mechanism is realized, and the displacement sensor measures the angle of attack mechanism and feeds back the angle of attack mechanism to the interior of the main controller; the invention can select different working modes according to different model attack angle control speeds and accuracies, and realizes the fast and accurate control of the model attack angle.
Description
Technical Field
The invention belongs to the technical field of aerospace wind tunnel tests, and particularly relates to a control device designed by crossing over the control of an attack angle of a supersonic wind tunnel model and a control method thereof.
Background
The model attack angle control device in the wind tunnel test is indispensable for measuring aerodynamic force characteristics of various aircraft (or component) models under different attack angles. The wind tunnel model attack angle control of more than 1 meter is realized by adopting a hydraulic device, and a controller outputs signals to control an electro-hydraulic servo valve so as to drive an oil cylinder, thereby pushing an actuating mechanism to realize the model attack angle control device. The current aircraft experiment requires that the variation range of the membrane performance attack angle is wide, the existing model attack angle control cannot realize the compromise on the control speed and the control precision, and a compromise method is mostly adopted.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
To achieve these objects and other advantages and in accordance with the purpose of the invention, a wind tunnel model angle of attack control apparatus is provided, comprising:
the main controller is connected with a control shaft I and a control shaft II in a bus mode; the control shaft I is connected with the electro-hydraulic servo valve I through a cable, and the control shaft II is connected with the electro-hydraulic servo valve II through a cable;
the angle of attack mechanism and the servo oil cylinder used for pushing the angle of attack mechanism to move, wherein, the angle of attack mechanism is installed on the arc-shaped guide rail; the servo oil cylinder is respectively connected with an electro-hydraulic servo valve I and an electro-hydraulic servo valve II through oil pipes, and the servo oil cylinder is arranged on the angle-of-attack mechanism; the displacement sensor is used for measuring the attack angle of the attack angle mechanism, is arranged in the servo oil cylinder or on the attack angle mechanism, and is connected with the main controller through a cable;
The wind tunnel model attack angle control device has the working principle that: the main controller drives the electro-hydraulic servo valve I and the electro-hydraulic servo valve II to act through control signals, the electro-hydraulic servo valve I and the electro-hydraulic servo valve II further drive the servo oil cylinder to act, the servo oil cylinder drives the angle-of-attack mechanism to slide on the arc-shaped track, angle change of the angle-of-attack mechanism is achieved, and the displacement sensor measures the angle of the angle-of-attack mechanism and feeds back the angle to the main controller.
Preferably, the angle-of-attack mechanism is a bending knife angle-of-attack mechanism.
Preferably, the bus connection mode is preferably a Sercos3 bus connection; the main controller preferably selects a Lishi MLC45 hydraulic system interface module; the electro-hydraulic servo valve I and the electro-hydraulic servo valve II are preferably MOOG servo valves, wherein the electro-hydraulic servo valve I is preferably a large high-frequency response valve with the model number of D662-XXXXXXP 01HXNW6N EX2G, and the electro-hydraulic servo valve II is preferably a small high-frequency response valve with the model number of D661-XXXXXP 30HXBW6N EX 2G; the servo oil cylinder is preferably a CSH1MT type servo oil cylinder, wherein the flow ratio of the large high-frequency response valve to the small high-frequency response valve is 5: 1; the displacement sensor is preferably an RHM1500MD70AS1B2100 displacement sensor.
Preferably, when the large high-frequency response valve works alone, the maximum running speed of the attack angle mechanism on the arc track is V 1At this time, the control accuracy of the angle-of-attack mechanism is αε1(ii) a When the small high-frequency response valve works alone, the maximum speed of the attack angle mechanism on the arc-shaped guide rail is V2The angle of attack mechanism control precision at this time is alphaε2In which V is1＞V2，αε1＞αε2(ii) a The running speed of the angle-of-attack mechanism on the arc-shaped guide rail is VnThe angle of attack mechanism requires a control accuracy of alphaε。
A control method of a wind tunnel model attack angle control device comprises the following working modes:
working mode one, as Vn＞V1I.e. the control speed required by the angle-of-attack mechanism has reached or exceeded the working capacity of the large high-frequency response valveWhen the large high-frequency response valve and the small high-frequency response valve are used in a combined mode, the main controller drives the large high-frequency response valve to act through a control signal, then the servo oil cylinder is driven to act, the servo oil cylinder drives the attack angle mechanism to slide on the arc-shaped guide rail, and attack angle change of the attack angle mechanism is achieved; then the main controller drives the small high-frequency response valve to act through a driving signal, so that the servo oil cylinder is driven to act, and the servo oil cylinder drives the attack angle mechanism to slide on the arc-shaped guide rail; without taking into account the control accuracy alpha of the angle of attack mechanismε；
Working mode II, when the angle of attack mechanism is required to control the speed V1≥Vn＞V2Control accuracy of alphaε＜αε1When the large high-frequency response valve and the small high-frequency response valve are used in a combined mode, the main controller drives the small high-frequency response valve to act through a control signal, then the servo oil cylinder is driven to act, the servo oil cylinder drives the attack angle mechanism to slide on the arc-shaped guide rail, and attack angle change of the attack angle mechanism is achieved; then the main controller drives the high-frequency response valve to act through a driving signal, so as to drive the servo oil cylinder to act, and the servo oil cylinder drives the attack angle mechanism to slide on the arc-shaped guide rail;
Working mode III, when the control speed V of the angle-of-attack mechanismn≤V1Control accuracy of angle of attack mechanism alphaε≥αε1When the angle-of-attack mechanism is used, the main controller is only used for driving the high-frequency response valve to act through the control signal, so that the servo oil cylinder is driven to act, the servo oil cylinder drives the angle-of-attack mechanism to slide on the arc-shaped guide rail, and the change of the angle-of-attack mechanism is realized;
working mode four, when the control speed V required by the angle of attack mechanismn≤V2Control accuracy of angle of attack mechanism alphaε＜αε1When the angle-of-attack mechanism is used, the main controller is only used for driving the small high-frequency response valve to act through the control signal, so that the servo oil cylinder is driven to act, the servo oil cylinder drives the angle-of-attack mechanism to slide on the arc-shaped guide rail, and the change of the angle-of-attack mechanism is realized.
Preferably, wherein the control speed of the attack angle mechanism is V at most1+V2The optimal control precision is alphaε2(ii) a When V isn＞V1+V2At maximum speed, i.e. the angle of attack mechanismRunning at a certain degree, and selecting a first working mode; when alpha isε＜αε2And when the angle of attack mechanism is in operation with the minimum control precision, one of the first working mode, the second working mode and the fourth working mode is selected according to the requirement of the operation speed.
Preferably, wherein the main controller controls the driving signals of the small high frequency response valve and the large high frequency response valve to be current signals.
Preferably, the angle of attack mechanism control adopts a position closed loop control mode, namely after a target angle of the angle of attack mechanism is determined, the target angle is input into the main controller, the main controller makes a difference between the target angle and an angle fed back by the displacement sensor to obtain delta a, and the delta a is used as a servo oil cylinder to control the angle change amount of the angle of attack mechanism; and then one of four working modes is selected according to the set model attack angle control speed and accuracy, so as to realize attack angle control of the attack angle mechanism.
The invention at least comprises the following beneficial effects: the main controller is connected with two control shafts, the two control shafts are respectively connected with independent electro-hydraulic servo valves, the two electro-hydraulic servo valves drive the servo oil cylinders according to a shaft distribution control method, the servo oil cylinders push the angle-of-attack mechanisms to move, the control of the angle of attack of the model is achieved, and the displacement sensors achieve the calculation of the angle of attack of the model. And different working modes are selected according to different model attack angle control speeds and accuracies, so that the rapid and accurate control of the model attack angle is realized.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Description of the drawings:
fig. 1 is a system structure block diagram of a wind tunnel model attack angle control device provided by the present invention.
The specific implementation mode is as follows:
the present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1: the invention provides a wind tunnel model attack angle control device, which comprises:
the main controller 1 is connected with a control shaft I31 and a control shaft II 32 in a bus connection mode; the control shaft I31 is connected with an electro-hydraulic servo valve I41, and the control shaft II 32 is connected with an electro-hydraulic servo valve II 42;
the device comprises an angle-of-attack mechanism 6 and a servo oil cylinder 5 for pushing the angle-of-attack mechanism to move, wherein the angle-of-attack mechanism 6 is installed on an arc track, the servo oil cylinder 5 is respectively connected with an electro-hydraulic servo valve I41 and an electro-hydraulic servo valve II 42 through oil pipes, and the servo oil cylinder 5 is installed on the angle-of-attack mechanism 6; the displacement sensor 7 is used for measuring the attack angle of the attack angle mechanism 6, is arranged in the servo oil cylinder 5 or on the attack angle mechanism 6, and is connected with the main controller 1 through a cable;
The wind tunnel model attack angle control device has the working principle that: the main controller 1 drives the electro-hydraulic servo valve I41 and the electro-hydraulic servo valve II 42 to act through control signals, the electro-hydraulic servo valve I41 and the electro-hydraulic servo valve II 42 further drive the servo oil cylinder 5 to act, the servo oil cylinder 5 drives the angle of attack mechanism 6 to slide on the arc-shaped track, angle change of the angle of attack mechanism 6 is achieved, and the displacement sensor 7 measures the angle of attack mechanism 6 and feeds back the angle of attack mechanism 6 to the main controller.
In another example, the attack angle mechanism 6 is a bending knife attack angle mechanism.
In another example, the main controller 1 preferably selects a li-shi MLC45 hydraulic system interface module; the electro-hydraulic servo valve I41 and the electro-hydraulic servo valve II 42 are preferably MOOG servo valves, wherein the electro-hydraulic servo valve I41 is preferably a large high-frequency response valve with the model number of D662-XXXXP01HXNW6NEX2G, and the electro-hydraulic servo valve II 42 is preferably a small high-frequency response valve with the model number of D661-XXXXXXP 30HXBW6NEX 2G; the servo oil cylinder 5 is preferably a CSH1MT type servo oil cylinder; the displacement sensor 7 is preferably an RHM1500MD70AS1B2100 displacement sensor.
In another example, when the large high-frequency response valve works alone, the maximum running speed of the attack angle mechanism 6 on the arc track is V1At this time, the control accuracy of the angle of attack mechanism 6 is α ε1(ii) a When the small high-frequency response valve works alone, the maximum speed of the attack angle mechanism 6 on the arc-shaped guide rail is V2At this time, the angle of attack mechanism 6 has a control accuracy of αε2In which V is1＞V2，αε1＞αε2(ii) a The operation speed of the angle-of-attack mechanism on the arc guide rail is VnThe angle of attack mechanism requires a control accuracy of alphaε。
Example 1:
when V isn＞V1When the control speed required by the angle of attack mechanism reaches or exceeds the working capacity of the large high-frequency response valve, the large high-frequency response valve and the small high-frequency response valve are used in a combined manner, the main controller drives the large high-frequency response valve to act through a control signal, and then drives the servo oil cylinder to act, and the servo oil cylinder drives the angle of attack mechanism to slide on the arc-shaped guide rail, so that the change of the angle of attack mechanism is realized; the main controller drives the small high-frequency response valve to act through a driving signal, so that the servo oil cylinder is driven to act, and the servo oil cylinder drives the angle-of-attack mechanism to slide on the arc-shaped guide rail; without taking into account the control accuracy alpha of the angle of attack mechanismε；
Example two:
when the angle of attack mechanism is required to control the speed V1≥Vn＞V2Control accuracy of alphaε＜αε1When the large high-frequency response valve and the small high-frequency response valve are used in a combined mode, the main controller drives the small high-frequency response valve to act through a control signal, then the servo oil cylinder is driven to act, the servo oil cylinder drives the attack angle mechanism to slide on the arc-shaped guide rail, and attack angle change of the attack angle mechanism is achieved; then the main controller drives the high-frequency response valve to act through a driving signal, so as to drive the servo oil cylinder to act, and the servo oil cylinder drives the attack angle mechanism to slide on the arc-shaped guide rail;
Example three:
when the control speed V of the angle-of-attack mechanismn≤V1Angle of attack mechanism control accuracy αε≥αε1When the angle-of-attack mechanism is used, the main controller is only used for driving the high-frequency response valve to act through the control signal, so that the servo oil cylinder is driven to act, the servo oil cylinder drives the angle-of-attack mechanism to slide on the arc-shaped guide rail, and the change of the angle-of-attack mechanism is realized;
example four:
when the angle of attack mechanism requires the control speed Vn≤V2Control accuracy of angle of attack mechanism alphaε＜αε1When the angle-of-attack mechanism is used, the main controller is only used for driving the small high-frequency response valve to act through the control signal, so that the servo oil cylinder is driven to act, the servo oil cylinder drives the angle-of-attack mechanism to slide on the arc-shaped guide rail, and the change of the angle-of-attack mechanism is realized.
In another example, the control speed of the attack angle mechanism is V at most1+V2The optimal control precision is alphaε2(ii) a When V isn＞V1+V2When the angle of attack mechanism is in the maximum speed operation, the working mode of the first embodiment is selected to control the angle of attack mechanism; when alpha isε＜αε2And at the moment, namely the viewing angle mechanism runs with the minimum control precision, selecting one working mode from the first embodiment, the second embodiment and the fourth embodiment according to the requirement of running speed to control the running of the angle-of-attack mechanism.
In another example, the main controller controls the driving signals of the small high-frequency response valve and the large high-frequency response valve to be current signals.
In another example, the angle of attack mechanism 6 is controlled in a position closed-loop control manner, that is, after a target angle of the angle of attack mechanism 6 is determined, the target angle is input into the main controller, the main controller 1 makes a difference between the target angle and an angle fed back by the displacement sensor 7 to obtain Δ a, and the Δ a is used as the servo oil cylinder 5 to control the angle change of the angle of attack mechanism 6; and then one of the working modes of the four embodiments is selected according to the set model attack angle control speed and the set model attack angle control precision, so as to realize attack angle control of the attack angle mechanism 6.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (5)
1. A wind tunnel model angle of attack control device, comprising:
The main controller is connected with a control shaft I and a control shaft II in a bus mode; the control shaft I is connected with the electro-hydraulic servo valve I through a cable, and the control shaft II is connected with the electro-hydraulic servo valve II through a cable;
the angle of attack mechanism and the servo oil cylinder used for pushing the angle of attack mechanism to move, wherein, the angle of attack mechanism is installed on the arc-shaped guide rail; the servo oil cylinder is respectively connected with an electro-hydraulic servo valve I and an electro-hydraulic servo valve II through oil pipes, and the servo oil cylinder is arranged on the angle-of-attack mechanism; the displacement sensor is used for measuring the attack angle of the attack angle mechanism, is arranged in the servo oil cylinder or on the attack angle mechanism, and is connected with the main controller through a cable;
the wind tunnel model attack angle control device has the working principle that: the main controller drives the electro-hydraulic servo valve I and the electro-hydraulic servo valve II to act through control signals, the electro-hydraulic servo valve I and the electro-hydraulic servo valve II further drive the servo oil cylinder to act, the servo oil cylinder drives the angle-of-attack mechanism to slide on the arc-shaped track, angle change of the angle-of-attack mechanism is achieved, and the displacement sensor measures the angle of the angle-of-attack mechanism and feeds back the angle to the main controller;
the bus connection mode is Sercos3 bus connection; the main controller is a Lishi MLC45 hydraulic system interface module; the electro-hydraulic servo valve I and the electro-hydraulic servo valve II are MOOG servo valves, wherein the model of the electro-hydraulic servo valve I is a large high-frequency response valve D662-XXXXXP 01HXNW6NEX2G, and the model of the electro-hydraulic servo valve II is a small high-frequency response valve D661-XXXXXP 30HXBW6NEX 2G; the servo oil cylinder is a CSH1MT type servo oil cylinder, wherein the flow ratio of the large high-frequency response valve to the small high-frequency response valve is 5: 1; the displacement sensor is an RHM1500MD70AS1B2100 displacement sensor;
When the large high-frequency response valve works alone, the attack angle mechanism is arranged on the arc-shaped trackHas a maximum running speed of V1At this time, the control accuracy of the angle of attack mechanism is αε1(ii) a When the small high-frequency response valve works alone, the maximum speed of the attack angle mechanism on the arc-shaped guide rail is V2The angle of attack mechanism control precision at this time is alphaε2In which V is1＞V2，αε1＞αε2(ii) a The running speed of the angle-of-attack mechanism on the arc-shaped guide rail is VnThe angle of attack mechanism requires a control accuracy of alphaε；
The control method of the wind tunnel model attack angle control device comprises the following four working modes:
working mode one, as Vn＞V1When the control speed required by the angle of attack mechanism reaches or exceeds the working capacity of the large high-frequency response valve, the large high-frequency response valve and the small high-frequency response valve are used in combination, the main controller drives the large high-frequency response valve to act through a control signal, and then drives the servo oil cylinder to act, and the servo oil cylinder drives the angle of attack mechanism to slide on the arc-shaped guide rail, so that the change of the angle of attack mechanism is realized; then the main controller drives the small high-frequency response valve to act through a driving signal, so that the servo oil cylinder is driven to act, and the servo oil cylinder drives the attack angle mechanism to slide on the arc-shaped guide rail; without taking into account the control accuracy alpha of the angle of attack mechanismε；
Working mode II, when the angle of attack mechanism is required to control the speed V 1≥Vn＞V2Control accuracy of alphaε＜αε1When the large high-frequency response valve and the small high-frequency response valve are used in a combined mode, the main controller drives the small high-frequency response valve to act through a control signal, then the servo oil cylinder is driven to act, the servo oil cylinder drives the attack angle mechanism to slide on the arc-shaped guide rail, and attack angle change of the attack angle mechanism is achieved; then the main controller drives the high-frequency response valve to act through a driving signal, so as to drive the servo oil cylinder to act, and the servo oil cylinder drives the attack angle mechanism to slide on the arc-shaped guide rail;
working mode III, when the control speed V of the angle-of-attack mechanismn≤V1Control accuracy of angle of attack mechanism alphaε≥αε1When the servo oil cylinder is used, the main controller is only used for driving the large high-frequency response valve to act through the control signal, and then the servo oil cylinder is driven to actThe servo oil cylinder drives the angle-of-attack mechanism to slide on the arc-shaped guide rail, so that the change of the angle-of-attack mechanism is realized;
working mode four, when the control speed V required by the angle of attack mechanismn≤V2Control accuracy of angle of attack mechanism alphaε＜αε1When the angle-of-attack mechanism is used, the main controller is only used for driving the small high-frequency response valve to act through the control signal, so that the servo oil cylinder is driven to act, the servo oil cylinder drives the angle-of-attack mechanism to slide on the arc-shaped guide rail, and the change of the angle-of-attack mechanism is realized.
2. The wind tunnel model angle of attack control device of claim 1, wherein the angle of attack mechanism is a bent blade angle of attack mechanism.
3. The wind tunnel model angle of attack control device of claim 1, wherein the control speed of the angle of attack mechanism is at most V1+V2The optimal control precision is alphaε2(ii) a When V isn＞V1+V2When the vehicle is in a normal state, the angle of attack mechanism is driven to run at the maximum speed; when alpha isε＜αε2And when the angle of attack mechanism is in operation with the minimum control precision, one of the first working mode, the second working mode and the fourth working mode is selected according to the requirement of the operation speed.
4. The wind tunnel model angle of attack control device of claim 1, wherein the drive signals for the main controller to control the small high frequency response valve and the large high frequency response valve are current signals.
5. The wind tunnel model attack angle control device according to claim 1, characterized in that the attack angle mechanism control adopts a position closed loop control mode, namely after a target angle of the attack angle mechanism is determined, the target angle is input into the main controller, the main controller makes a difference between the target angle and an angle fed back by the displacement sensor to obtain delta a, and the delta a is used as a servo cylinder to control the angle change amount of the attack angle mechanism; and then one of four working modes is selected according to the set model attack angle control speed and accuracy, so as to realize attack angle control of the attack angle mechanism.
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| CN112903233B (en) * | 2021-01-26 | 2022-12-20 | 中国空气动力研究与发展中心设备设计及测试技术研究所 | Optimization method for accurate positioning of two-stage series servo oil cylinder driving attack angle mechanism |
| CN113970418A (en) * | 2021-10-26 | 2022-01-25 | 中国航空工业集团公司哈尔滨空气动力研究所 | Variable attack angle device for wind tunnel test |
| CN114379820B (en) * | 2022-03-24 | 2022-05-20 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Variable-angle variable-speed model water outlet and inlet device |
| CN114859701B (en) * | 2022-05-31 | 2023-03-21 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel large attack angle device and control system |
| CN116380403B (en) * | 2023-06-05 | 2023-08-15 | 中国空气动力研究与发展中心高速空气动力研究所 | Driving control system of high-speed wind tunnel multi-degree-of-freedom model supporting mechanism and application method |
| CN117874400A (en) * | 2024-03-13 | 2024-04-12 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Aircraft model dynamic derivative test data processing system |
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| CN202886998U (en) * | 2012-09-25 | 2013-04-17 | 中国空气动力研究与发展中心高速空气动力研究所 | Temporary punching type hypersonic wind tunnel model angle of incidence redundancy control device |
| CN105157949A (en) * | 2015-10-16 | 2015-12-16 | 中国空气动力研究与发展中心低速空气动力研究所 | Model attack angle mechanism |
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