CN108572054B - Temporary-impulse type wind tunnel simulation test method and device - Google Patents
Temporary-impulse type wind tunnel simulation test method and device Download PDFInfo
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Abstract
The invention relates to the field of wind tunnel test simulation tests. Aiming at the problems in the prior art, the invention provides a temporary-impulse type wind tunnel simulation test method and device. The method has great advantages for verifying the test process, assisting in setting the control parameters and reducing the debugging riskThe multifunctional electric heating cooker has the characteristics of simplicity and convenience in operation, complete functions, high applicability and the like. The wind tunnel simulation test system not only realizes the wind tunnel simulation test better, but also is suitable for the relevant training of newly entered personnel. The auxiliary setting step of the control parameters carries out first-order derivation according to the fitted controlled parameter regulating characteristic curve function obtained in the simulation unit step to obtain the proportional regulating coefficient k of the controlled parameterspBy modifying the control parameter kpAnd kiAccording to the obtained controlled parameter simulation test effect, the auxiliary setting work of the control parameter can be well completed after a plurality of tests, and a basic basis is provided for parameter setting of a subsequent actual blowing test, wherein k ispChange with reference to the estimated value, kiStarting from 0 and increasing.
Description
Technical Field
The invention relates to the field of wind tunnel test simulation tests, in particular to a temporary-impulse type wind tunnel simulation test method and device.
Background
The wind tunnel is a pipeline-shaped test device for generating controllable uniform airflow, and is ground simulation equipment for researching the air flow law and the aerodynamic characteristics of aerospace aircrafts and other objects. The wind tunnel can be divided into a plurality of forms according to different wind tunnel driving forms, and the temporary impulse type wind tunnel is selected as a research object.
The temporary-flushing wind tunnel control system mainly comprises an operation management system, a test flow field adjusting system, a data acquisition system, a data processing system, a state monitoring system and the like. Before the temporary impulse type wind tunnel test is carried out, under the condition that equipment is not ventilated, engineering personnel firstly debug and confirm the test flow, test parameters, equipment communication and other contents of a wind tunnel control system, and the problems of flow errors, unreasonable parameter setting, equipment misoperation and the like in the actual test process are prevented, so that test data is invalid, and even test safety and risks are caused. Therefore, it is usually necessary to introduce a simulation test system into the wind tunnel test, so as to improve the economy and safety of the wind tunnel test. The traditional wind tunnel simulation adopts an off-line mode of control system equipment, namely, each executing mechanism does not participate in simulation debugging, and only uses wind tunnel simulation test software to simulate the motion of each equipment in the control system and adjust the controlled parameters. Therefore, only the errors of the compilation of the wind tunnel flow field control software and the basic test process can be verified, and the reasonability of the control parameters and the flow field regulation strategy and the normality of the linkage of all the equipment of the system cannot be verified. The above problems are prominent in the wind tunnel simulation debugging test process, and are the key to further improve the wind tunnel simulation test level.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problems in the prior art, a temporary-impulse wind tunnel simulation test method and a temporary-impulse wind tunnel simulation test device are provided. The method has great help for verifying the test process, assisting in setting the control parameters and reducing the debugging risk, and has the characteristics of simple and convenient operation, complete functions, high applicability and the like. The wind tunnel simulation test system not only realizes the wind tunnel simulation test better, but also is suitable for the relevant training of newly entered personnel.
The technical scheme adopted by the invention is as follows:
a temporary-impulse type wind tunnel simulation test method comprises the following steps:
a test process control step: the test process control unit controls the parameter acquisition unit to acquire data according to the acquired wind tunnel test control command; meanwhile, the motion control unit is controlled to perform online control on each actuating mechanism; the test process control unit sets a controlled parameter target value and carries out wind tunnel simulation test according to set control logic and strategy; in the test, the parameter acquisition unit measures parameters of each actuating mechanism of the wind tunnel;
a simulation unit step: according to an adjusting characteristic table and a controlled parameter adjusting characteristic curve function obtained by an identification test, calculating a controlled parameter value of the wind tunnel corresponding to each actuating mechanism parameter information measured by a parameter acquisition unit;
auxiliary setting step of control parameters: performing first-order derivation according to the controlled parameter regulation characteristic curve function obtained by the step fitting of the simulation unit to obtain the proportional regulation coefficient k of the controlled parameterp. By modifying the control parameter kpAnd kiAccording to the obtained controlled parameter simulation test effect, the auxiliary setting work of the control parameter can be well completed after a plurality of tests, and a basic basis is provided for parameter setting of a subsequent actual blowing test, wherein k ispChange with reference to the estimated value, kiStarting from 0 and increasing.
Further, the temporary-impulse wind tunnel simulation test method further comprises the following wind tunnel operation management steps: establishing a shared variable through LabVIEW, establishing network connection to realize network sharing, and setting the reading permission and the writing permission of the shared variable; after the variable is created, the test process control unit accesses the shared variable created by the wind tunnel operation management unit through the communication unit; and analyzing the shared variable set by the wind tunnel operation management unit to obtain a wind tunnel test control command.
Further, the simulation unit module performs actual measurement on the execution mechanisms by an identification method, so as to obtain adjustment characteristic tables corresponding to a plurality of execution mechanisms and controlled parameters; and measuring the same mechanism parameter for multiple times through the table to obtain multiple controlled parameter adjusting characteristics, fitting a controlled parameter adjusting characteristic curve function, and calculating the controlled parameter value corresponding to each executing mechanism parameter information measured by the parameter acquisition unit.
Furthermore, the temporary-impulse wind tunnel simulation test method further comprises a graphic display unit which receives various parameter values obtained by the parameter acquisition unit and the simulation unit, and realizes real-time display of various controlled parameters and the adjustment quantity of the actuating mechanism through a graphic interface and a text box, so that visual display of the wind tunnel simulation test is realized.
A temporary-impulse wind tunnel simulation test device comprises:
a test process control unit: the device is used for controlling the parameter acquisition unit to acquire data according to the acquired wind tunnel test control command; meanwhile, the motion control unit is controlled to perform online control on each actuating mechanism; the test process control unit sets a controlled parameter target value and carries out wind tunnel simulation test according to set control logic and strategy; in the test, the parameter acquisition unit measures parameters of each actuating mechanism of the wind tunnel;
a simulation unit: the wind tunnel controlled parameter value corresponding to each executing mechanism parameter information measured by the parameter collecting unit is calculated according to the regulating characteristic table and the controlled parameter regulating characteristic curve function obtained by the identification test;
the control parameter auxiliary setting module: the proportional adjustment coefficient k is used for carrying out first-order derivation according to the controlled parameter adjustment characteristic curve function obtained by the step fitting of the simulation unit to obtain the controlled parameterp. By modifying the control parameter kpAnd kiAccording to the obtained controlled parameter simulation test effect, the auxiliary setting work of the control parameter can be well completed after a plurality of tests, and a basic basis is provided for parameter setting of a subsequent actual blowing test, wherein k ispChange with reference to the estimated value, kiStarting from 0 and increasing.
Further, the temporary-impulse type wind tunnel simulation test device further comprises a wind tunnel operation management unit: the system is used for establishing a shared variable through LabVIEW, establishing network connection to realize network sharing, and setting the reading permission and the writing permission of the shared variable; after the variable is created, the test process control unit accesses the shared variable created by the wind tunnel operation management unit through the communication unit; and analyzing the shared variable set by the wind tunnel operation management unit to obtain a wind tunnel test control command.
Further, the simulation unit performs actual measurement on the execution mechanism through an identification method, so as to obtain an adjustment characteristic table corresponding to a plurality of execution mechanism parameters and controlled parameters; and measuring the same mechanism parameter for multiple times through the table to obtain multiple controlled parameter adjusting characteristics, fitting a controlled parameter adjusting characteristic curve function, and calculating the controlled parameter value corresponding to each executing mechanism parameter information measured by the parameter acquisition unit.
Furthermore, the temporary-impulse type wind tunnel simulation test device further comprises a graphic display unit, the graphic display unit receives various parameter values obtained by the parameter acquisition unit and the simulation unit, real-time display of various controlled parameters and the adjustment quantity of the execution mechanism is achieved through a graphical interface and a text box, and visual display of the wind tunnel simulation test is achieved.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
in the temporary-impulse wind tunnel test, the control parameters can be firstly explored under the condition of no gas source consumption so as to determine a more accurate range and influence relationship. Meanwhile, each parameter simulation unit is based on the actual regulation characteristic of the wind tunnel, so that when a wind tunnel simulation test is carried out, the regulation characteristic of the actual controlled parameter can be well reflected by utilizing the simulation unit to carry out parameter feedback, and the actual effect of the selected control parameter is well reflected. Therefore, different control parameters are selected, the auxiliary setting work of the control parameters can be well completed after several times of simulation tests, and a basic basis is provided for parameter setting of a subsequent actual blowing test.
Before the wind tunnel simulation test, the target value of the controlled parameter is set, and then the wind tunnel simulation test is carried out according to the set control logic and strategy. In the test, various sensors in the system measure the displacement of each executing mechanism of the wind tunnel, the simulation unit calculates the controlled parameter value of the wind tunnel in real time by using the obtained mechanism position information, and the actual measurement position information and the simulation parameter information form position and parameter closed-loop control. Therefore, the adjustment of the actuating mechanism is introduced into the simulation test, so that the simulation of the control logic and the strategy in the actual test process is realized, and the simulation of the wind tunnel test process is improved.
According to the characteristic curve function obtained by the identification test, a simulation unit is additionally arranged in wind tunnel simulation test software, the input of the simulation unit is the position or the opening degree of a wind tunnel execution mechanism, and the output of the simulation unit is controlled parameters (total pressure, static pressure, injection pressure, Mach number and the like) of the wind tunnel. When the simulation test is carried out, the on-site actually measured pressure signal of the wind tunnel is ignored, and the output value of the simulation unit is used as feedback to participate in the closed-loop control of each controlled parameter.
The other main function is to realize the graphical display of the wind tunnel simulation test process. The graphical display of the traditional wind tunnel simulation test can only simply show the communication condition among the systems, so that the test process cannot be completely simulated. The invention is improved on the original basis, and can display the motion condition of each actuating mechanism and the change condition of each controlled parameter in the simulation test in real time in the simulation test process through the visual graphical interface, thereby intuitively and vividly simulating the actual blowing process. Therefore, engineering personnel can conveniently and accurately master whether the wind tunnel test flow, the control strategy and the control parameter setting are accurate and reliable in the wind tunnel debugging and test preparation process, and the reliability and the safety of the wind tunnel test are improved. Meanwhile, the visual wind tunnel display function also facilitates the understanding and the experience of wind tunnel personnel on the wind tunnel control strategy during technical training, and facilitates the development of training work.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a transient wind tunnel simulation test method.
Fig. 2 is a general structural view.
FIG. 3 is a flowchart of the experimental program control process.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The functional module of the invention comprises:
1. test procedure control function
One of the main functions of the invention is to realize the single-action and linkage control of each actuating mechanism of the control system in the simulation test. In a traditional wind tunnel simulation test, an execution mechanism of a control system, which is responsible for adjusting controlled parameters such as total pressure, Mach number and the like, adopts an off-line adjustment mode, does not participate in the simulation test process, and directly outputs simulated total pressure and Mach number values through the control system to serve as feedback values of the control system. On the basis of the original method, the invention realizes the independent control of each actuating mechanism in the simulation test process, and simultaneously can carry out time sequence control on a plurality of actuating mechanisms according to the set test flow, thereby realizing the online linkage adjustment of the mechanisms. Through the mode, the reliability of independent motion control of each mechanism can be verified, equipment faults occurring in the actual blowing process can be prevented, and a hardware basis can be provided for complete wind tunnel simulation through linkage adjustment.
2. Simulation function
One of the main functions of the invention is to perform complete simulation on the wind tunnel test flow. The wind tunnel test flow refers to a process that each actuating mechanism of the wind tunnel control system is combined and linked according to a specific control strategy according to test requirements in a test process. The designed test flow can be verified by adopting an actual blowing test, but frequent blowing tasks cannot meet the requirement of debugging the test economy, and meanwhile, a certain safety risk can be caused by a wrong test flow. Therefore, before debugging and formal testing of the wind tunnel flow field, the test flow control needs to be confirmed by means of simulation test.
The traditional simulation test flow control is carried out in an off-line simulation mode of a control system execution mechanism, and the change of an actual test flow cannot be completely reflected. When the simulation test starts, the control system sends a flow field stabilization signal to the measurement system, and the measurement system further completes the set simulation test process. By adopting the mode, communication joint adjustment among all systems of the wind tunnel is realized, the specific flow of wind tunnel flow field adjustment cannot be accurately simulated, and the verification of system control strategies and parameters cannot be realized.
Aiming at the defects of the original method, the invention brings the adjustment of each actuating mechanism of the control system into a simulation test. The specific implementation method comprises the following steps:
1) and (5) identification test. The identification test is a process of obtaining the regulation characteristic of the system execution mechanism on the controlled parameter under a specific test state. Taking the example of controlling the total pressure of the wind tunnel by the wind tunnel main pressure regulating valve mechanism, under the condition that other conditions are determined, in order to obtain the regulation characteristic of the opening degree of the main pressure regulating valve to the total pressure, the valve is positioned to a certain opening degree in a mechanism single-action mode, a stable total pressure value corresponding to the opening degree is obtained, then the valve is operated in fixed steps, and the total pressure value corresponding to each step is collected after the pressure is stable. Thus, a series of data of opening degree and stable pressure near the target pressure are obtained, and a valve control characteristic curve function P in a certain state is obtained according to calculation0＝f(Pair,Sf,N,Sv) In which P is0Is pressure, PairIs the pressure of the gas source, SfFor the position of the grid fingers, N the profile of the nozzle, SvIs the valve opening.
2) And establishing a simulation unit. According to the characteristic curve function obtained by the identification test, a simulation unit is additionally arranged in wind tunnel simulation test software, the input of the simulation unit is the position or the opening degree of a wind tunnel execution mechanism, and the output is controlled parameters (total pressure, static pressure, injection pressure, Mach number and the like) of the wind tunnel. When the simulation test is carried out, the on-site actually measured pressure signal of the wind tunnel is ignored, and the output value of the simulation unit is used as feedback to participate in the closed-loop control of each controlled parameter.
3) And (5) simulating the test step. And setting a target value of a controlled parameter according to data obtained by the identification test, and then carrying out a wind tunnel simulation test according to a set control logic and a set strategy. In the test, various sensors in the system measure the displacement of each executing mechanism of the wind tunnel, the simulation unit calculates the controlled parameter value of the wind tunnel in real time by using the obtained mechanism position information, and the actual measurement position information and the simulation parameter information form position and parameter closed-loop control. Therefore, the adjustment of the actuating mechanism is introduced into the simulation test, so that the simulation of the control logic and the strategy in the actual test process is realized, and the simulation of the wind tunnel test process is improved.
4) And controlling a parameter auxiliary setting function. The other main function of the invention is to carry out auxiliary setting aiming at the control parameter. The automatic control system mainly comprises a controlled object, a controller and a feedback link. The closed loop behavior of the system is largely dependent on the performance of the controller, which is based on the selection of control parameters. In the traditional temporary-impulse type wind tunnel simulation test method, each actuating mechanism is in an off-line mode, so that the control effect of each actuating mechanism cannot be accurately simulated. The set control parameters can only be set and verified by an engineer through multiple actual blowing tests, so that the debugging cost is greatly increased, and meanwhile, the unreasonable control parameters can cause the safety risk of a control system and influence the normal operation of the wind tunnel.
Aiming at the problems, the invention realizes the auxiliary setting function of the control parameters, and takes the main pressure regulating valve mechanism to control the total pressure of the wind tunnel as an example. The simulation unit established by using the controlled parameter regulation characteristic curve function obtained in the system identification test process comprises the change relation between the mechanism position information and the wind tunnel controlled parameter information, so that the valve position correction amount required by each change of the total pressure by 1kPa can be obtained by using the controlled parameter regulation characteristic curve function, and the control parameter k of the total pressure closed loop can be estimated firstlyp (kp＝f′(Pair,Sf,N,Sv)). Meanwhile, when a simulation test is carried out, all actuating mechanisms of the wind tunnel control system are in linkage control under the unified scheduling of the controllers in the simulation test system, and all parameter simulation units are based on the actual regulation characteristic of the wind tunnel, so that the regulation characteristic of the actual controlled parameter can be well reflected by utilizing the parameter feedback of the simulation units, and the actual effect of the selected control parameter is well reflected. Thus by modifying the control parameter (k)pChange with reference to the estimated value, kiContinuously increasing from 0), simulating test effect according to the obtained controlled parameters, and finishing auxiliary setting work of the control parameters after a plurality of testsAnd a basic basis is provided for parameter setting of a subsequent actual blowing test.
5) And (5) graphical display function. The other main function of the device is to realize the graphical display function of the wind tunnel simulation test process. The graphic display unit receives various parameter values obtained by the parameter acquisition unit and the simulation unit, and realizes real-time display of various controlled parameters and the adjustment quantity of the actuating mechanism through a graphical interface and a text box, so that visual display of a wind tunnel simulation test is realized.
The traditional simulation test can not completely simulate the test process, so the original graphical display can only simply show the communication condition among all systems of the wind tunnel. The invention is improved on the original basis, and can display the motion condition of each actuating mechanism and the change condition of each controlled parameter in the simulation test in real time in the simulation test process through the visual graphical interface, thereby intuitively and vividly simulating the actual blowing process. Therefore, engineering personnel can conveniently and accurately master whether the wind tunnel test flow, the control strategy and the control parameter setting are accurate and reliable in the wind tunnel debugging and test preparation process, and the reliability and the safety of the wind tunnel test are improved. Meanwhile, the visual wind tunnel display function also facilitates the understanding and the experience of wind tunnel personnel on the wind tunnel control strategy during technical training, and facilitates the development of training work.
In order to realize the main functions of the temporary-impulse wind tunnel simulation test, the following method and device are designed:
1. wind tunnel operation management unit
The wind tunnel operation management unit is superior computer software for commanding and scheduling in a wind tunnel test, the software is used for scheduling and managing state information of a wind tunnel simulation test system, a wind tunnel flow field control system and other general equipment, the system is usually in communication connection with the wind tunnel simulation system through a network, and the wind tunnel operation management unit is mainly suitable for downloading and uploading control parameters and sensor coefficients. In order to realize the unification of development platforms in a certain range, a system software development platform is unified into LabVIEW of NI company, and in order to realize the decoupling of network communication and application software, a network shared variable engine of the LabVIEW is selected as a network communication middleware and is mainly suitable for reading state information and issuing a single operation command.
The establishing process of the communication between the operation management software and each device in the wind tunnel simulation test system is as follows:
a. creating a network shared variable: network sharing variables needing communication are established in the wind tunnel simulation test system, and the network sharing variables can be variables of a certain type or data types based on custom controls. And setting the read and write permissions of the variable, and after the variable is created, the terminal obtaining the access permission can access the variable.
b. Creating a network connection: a network connection is created in the run management module that points to the accessed object, the network connection pointing to an address of the shared variable.
c. Reading and writing data: and performing read-write operation on the variable by using variable read and write functions according to the access authority of the variable.
2. Motion control unit
The simulation test motion control unit mainly realizes the single action and linkage control of each actuating mechanism of the wind tunnel. The main controlled objects of the temporary impulse type wind tunnel comprise a main pressure regulating valve system, a bypass pressure regulating valve system, an injection pressure regulating valve system, a grid finger mechanism, an attack angle mechanism and the like. The control functions and modes of all the systems are basically the same, and the control method of the motion control unit is described below by taking a main pressure regulating valve system as an example.
The main pressure regulating valve system control object comprises a main pressure regulating valve, a main pressure regulating valve quick valve and a main pressure regulating valve quick valve equalizing valve; the limit position switching value monitored by the main pressure regulating valve system comprises full-on/full-off of the main pressure regulating valve, full-on/full-off of a pneumatic quick valve of the main pressure regulating valve and full-on/full-off of a pressure equalizing valve of the quick valve of the main pressure regulating valve; the main pressure regulating valve system monitoring analog quantity comprises main pressure regulating valve displacement, total pressure of a stable section, static pressure of a test section, valve back pressure of the main pressure regulating valve, air source pressure, atmospheric pressure and the like. Its main control functions include:
a. main pressure regulating valve positioning function (speed, position, limit position);
b. a main pressure regulating valve positioning suspension function;
c. main pressure regulating valve inching control function (speed, direction);
d. the main pressure regulating valve returns to zero;
e. a main pressure regulating valve driver is enabled/disabled;
f. the main pressure regulating valve driver is reset due to failure;
g. the motor brake contracting/brake releasing of the main pressure regulating valve;
h. a main pressure regulating valve quick valve open/close operation;
i. and (4) opening/closing a pressure equalizing valve of the quick valve of the main pressure regulating valve.
The main steps for realizing the motion control of the mechanism comprise:
1) data input:
the control parameters are from the wind tunnel operation management module, and the input instruction content comprises:
a. positioning speed: the measurement unit is mm/s, the speed precision is 1mm/s, and the effective range of the designed speed is 0-30 mm/s;
b. positioning position: the measurement unit is mm, the position precision is 0.2mm, and the effective range of the position is 0-300 mm;
c. positioning direction: the positive direction is the valve opening direction, and the negative direction is the valve closing direction;
d. limiting position: the measurement unit is mm, and the effective range is 0-300 mm;
e. and (3) executing actions: the Boolean quantity control instruction executes corresponding actions of positioning, opening a valve, enabling and releasing a brake when the instruction is converted from False to True, and executes the opposite action when the instruction is converted from True to False; and executing corresponding action in the holding state of the jog button, and canceling the action after the jog button is released.
3. Parameter acquisition unit
In order to realize closed-loop adjustment of each controlled parameter of the wind tunnel, each parameter needs to be measured in real time. The parameter acquisition unit selects various sensors to acquire corresponding parameters according to actual requirements in the wind tunnel. The sensors used are shown in table 1.
TABLE 1 parameter acquisition table for temporary-impulse wind tunnel simulation test
4. Simulation unit
The simulation unit firstly obtains the adjusting characteristics of each actuating mechanism by a system identification method, and the adjusting conditions of the actual controlled parameters are simulated. When the motion control unit adjusts each actuating mechanism, the simulation unit converts the mechanism displacement fed back by the parameter acquisition unit into a controlled parameter value in real time, and the controlled parameter value is used as a feedback value of the controlled parameter, so that the closed-loop control of the parameter is realized.
The specific implementation method comprises the following contents:
a. obtaining the regulation characteristics of a main pressure regulating valve system and a bypass pressure regulating valve system as a total pressure simulation unit through a system identification test;
b. acquiring the system regulation characteristic of the injection pressure regulating valve through a system identification test to serve as an injection pressure simulation unit;
c. and obtaining the adjusting characteristic of the grating finger mechanism as a Mach number simulation unit through a system identification test.
5 test procedure control unit
The test process control unit is mainly responsible for process management in the simulation test. The unit sends a control instruction to the motion control unit according to a set simulation test working condition and a corresponding test flow, so that single-action control of a mechanism and control of process states of wind tunnel preparation for driving, starting a test, collecting of a measuring system, finishing collecting, changing to a next step, normally shutting down, emergently shutting down, ending the test and the like are realized. The control flow chart is shown in fig. 3.
The specific implementation method of the test process control unit comprises the following steps:
after receiving a 'ready-to-drive' command issued by the wind tunnel operation management unit, the test process enters a ready-to-drive stage, equipment state inspection before testing is carried out, and the readiness of the equipment to be tested is determined; and meanwhile, forwarding a 'ready-to-drive' command to other units in the wind tunnel simulation test system.
The method comprises the steps that the test is ready, after a 'driving' command sent by an operation management unit is received, a test process is switched to a test in-process state, the flow field stable state is judged, the flow field stable state is sent, after the flow field stable state is received and collected by a measurement system, the flow field stable state continues to be changed to the next step, so that the test step is managed according to the current test working condition, and after the test step is completed, the test process is switched to a driving closing process.
And after each subunit finishes shutting down according to the shutting down requirement, the test process is switched to a test ending state, and various parameters are reset to a default state. The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (8)
1. A temporary-impulse type wind tunnel simulation test method is characterized by comprising the following steps:
a test process control step: the test process control unit controls the parameter acquisition unit to acquire data according to the acquired wind tunnel test control command; meanwhile, the motion control unit is controlled to perform online control on each actuating mechanism; the test process control unit sets a controlled parameter target value and carries out wind tunnel simulation test according to set control logic and strategy; in the test, the parameter acquisition unit measures parameters of each actuating mechanism of the wind tunnel;
a simulation unit step: according to an adjusting characteristic table and a controlled parameter adjusting characteristic curve function obtained by an identification test, calculating a controlled parameter value of the wind tunnel corresponding to each actuating mechanism parameter measured by a parameter collecting unit;
auxiliary setting step of control parameters: performing first-order derivation according to a controlled parameter regulation characteristic curve function obtained by the step fitting of the simulation unit to obtain a proportional regulation coefficient kp of the controlled parameter; by modifying the control parameters kp and ki, the auxiliary setting work of the control parameters can be well completed after a plurality of tests according to the obtained controlled parameter simulation test effect, and a basic basis is provided for parameter setting of the subsequent actual blowing test, wherein kp is changed by taking the estimated value as a reference, and ki is continuously increased from 0.
2. The transient wind tunnel simulation test method according to claim 1, further comprising a wind tunnel operation management step: the wind tunnel operation management unit establishes a shared variable through LabVIEW, establishes network connection to realize network sharing, and sets the reading authority and the writing authority of the shared variable; after the variable is created, the test process control unit accesses the shared variable created by the wind tunnel operation management unit through the communication unit; and analyzing the shared variable set by the wind tunnel operation management unit to obtain a wind tunnel test control command.
3. The transient wind tunnel simulation test method according to claim 1, wherein the simulation unit step is to perform actual measurement on the execution mechanisms by an identification method, so as to obtain adjustment characteristic tables corresponding to the controlled parameters of the plurality of execution mechanisms; and measuring the same mechanism parameter for multiple times through the table to obtain multiple controlled parameter adjusting characteristics, fitting a controlled parameter adjusting characteristic curve function, and calculating the controlled parameter value corresponding to each executing mechanism parameter information measured by the parameter acquisition unit.
4. The transient wind tunnel simulation test method according to one of claims 1 to 3, further comprising a graphic display unit for receiving parameter values obtained by the parameter acquisition unit and the simulation unit, and realizing real-time display of the controlled parameters and the adjustment quantity of the actuator through a graphic interface and a text box, thereby realizing visual display of the wind tunnel simulation test.
5. A temporary-impulse type wind tunnel simulation test device is characterized by comprising:
a test process control unit: the device is used for controlling the parameter acquisition unit to acquire data according to the acquired wind tunnel test control command; meanwhile, the motion control unit is controlled to perform online control on each actuating mechanism; the test process control unit sets a controlled parameter target value and carries out wind tunnel simulation test according to set control logic and strategy; in the test, the parameter acquisition unit measures parameters of each actuating mechanism of the wind tunnel;
a simulation unit: the wind tunnel controlled parameter value corresponding to each executing mechanism parameter information measured by the parameter collecting unit is calculated according to the regulating characteristic table and the controlled parameter regulating characteristic curve function obtained by the identification test;
the control parameter auxiliary setting module: the proportional control coefficient kp is used for performing first-order derivation according to the controlled parameter regulation characteristic curve function obtained by the simulation unit step fitting to obtain the controlled parameter; by modifying the control parameters kp and ki, the auxiliary setting work of the control parameters can be well completed after a plurality of tests according to the obtained controlled parameter simulation test effect, and a basic basis is provided for parameter setting of the subsequent actual blowing test, wherein kp is changed by taking the estimated value as a reference, and ki is continuously increased from 0.
6. The transient wind tunnel simulation test device according to claim 5, further comprising a wind tunnel operation management unit: the system is used for establishing a shared variable through LabVIEW, establishing network connection to realize network sharing, and setting the reading permission and the writing permission of the shared variable; after the variable is created, the test process control unit accesses the shared variable created by the wind tunnel operation management unit through the communication unit; and analyzing the shared variable set by the wind tunnel operation management unit to obtain a wind tunnel test control command.
7. The transient wind tunnel simulation test device according to claim 5, wherein the simulation unit measures the execution mechanism actually by an identification method, so as to obtain a plurality of adjustment characteristic tables corresponding to the parameters of the execution mechanism and the controlled parameters; and measuring the same mechanism parameter for multiple times through the table to obtain multiple controlled parameter adjusting characteristics, fitting a controlled parameter adjusting characteristic curve function, and calculating the controlled parameter value corresponding to each executing mechanism parameter information measured by the parameter acquisition unit.
8. The temporary-impulse wind tunnel simulation test device according to one of claims 5 to 7, further comprising a graphic display unit for receiving parameter values obtained by the parameter acquisition unit and the simulation unit, and realizing real-time display of the controlled parameters and the adjustment quantity of the actuating mechanism through a graphic interface and a text box, thereby realizing visual display of the wind tunnel simulation test.
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| CN111207904A (en) * | 2020-01-02 | 2020-05-29 | 北京航天测控技术有限公司 | Wind tunnel test method, device and equipment based on VR and computer readable medium |
| CN111738627B (en) * | 2020-08-07 | 2020-11-27 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel test scheduling method and system based on deep reinforcement learning |
| CN112069446B (en) * | 2020-08-28 | 2022-04-01 | 中国空气动力研究与发展中心计算空气动力研究所 | Wind tunnel group high-pressure air resource scheduling method and system |
| CN112068612B (en) * | 2020-09-14 | 2022-10-18 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel operation safety shutdown control method based on configuration mode |
| CN112346360B (en) * | 2020-11-09 | 2021-05-14 | 中国空气动力研究与发展中心超高速空气动力研究所 | Wind tunnel test flow verification method for mixed execution of actual operation and simulation |
| CN112304554B (en) * | 2020-12-02 | 2022-07-08 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for improving practicability of characteristic curve of annular gap pressure regulating valve of wind tunnel |
| CN113375897B (en) * | 2021-05-26 | 2022-09-20 | 北京航空航天大学 | Modeling simulation method for temporary impulse type wind tunnel system |
| CN113280992A (en) * | 2021-07-19 | 2021-08-20 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel virtual flight test system for lifting body model |
| CN114912301B (en) * | 2022-07-18 | 2022-09-20 | 中国空气动力研究与发展中心低速空气动力研究所 | Low-speed wind tunnel full-machine model force measurement test data processing and correcting system |
| CN114936477B (en) * | 2022-07-22 | 2022-11-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel operation and flow field control system design method based on WorkFlow |
| CN116296219B (en) * | 2023-05-24 | 2023-08-04 | 中国航空工业集团公司沈阳空气动力研究所 | Precise control method for temporary impact transonic wind tunnel target Mach number and rapid pressure |
| CN116382178B (en) * | 2023-06-05 | 2023-08-08 | 中国空气动力研究与发展中心高速空气动力研究所 | Full-hydraulic servo driving control method for profile of jet pipe of large high-speed wind tunnel |
| CN117874400B (en) * | 2024-03-13 | 2024-06-04 | 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 |
| CN103123504A (en) * | 2012-12-18 | 2013-05-29 | 中国空气动力研究与发展中心高速空气动力研究所 | Speed change pressure flow field control method applicable to intermittent transonic speed wind tunnel |
| CN103135624B (en) * | 2012-12-19 | 2015-05-13 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for controlling temporary flush type supersonic velocity wind tunnel with ejector function |
| CN104932565B (en) * | 2015-06-04 | 2017-06-06 | 中国空气动力研究与发展中心高速空气动力研究所 | A kind of temporary stamp injector powered transonic wind tunnel flow field control structure of high accuracy |
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