Device and method for measuring elastic angle coefficient of continuous wind tunnel supporting system

Abstract

The invention discloses a continuous wind tunnel supporting system elastic angle coefficient measuring device and method, and belongs to the technical field of wind tunnel tests. The device comprises a supporting system, an elastic angle loading device and a test model, the elastic angle loading device loads the supporting system to obtain elastic deformation of an inherent supporting part of a test section under each rolling angle gamma and each load step, and the elastic deformation is converted into an elastic deformation angle, namely an elastic angle. According to the method, the problem that deviation exists in elastic angle measurement of a continuous wind tunnel under the working conditions of a model attack angle and a sideslip angle by adopting a coupling linkage mode in the prior art is solved, the elastic angle measurement accuracy is improved, and the model attitude angle accuracy is further improved.

Description

Technical Field

[0001] The invention relates to a device and method for measuring elastic angle coefficient of a continuous wind tunnel support system, belonging to the technical field of wind tunnel testing. Background Art

[0002] When conducting force measurement wind tunnel tests, the model is installed in the wind tunnel test section through a support system consisting of a balance, a support rod and a scimitar mechanism. The entire support system will undergo elastic deformation after being loaded, resulting in a deviation between the model's true attitude angle and the nominal angle. In order to obtain the model's true attitude angle during the wind tunnel test, elastic angle correction is required. The most commonly used method is to obtain the elastic angle correction coefficient of the entire support system, referred to as the elastic angle coefficient, by measuring it during ground debugging.

[0003] At present, the scimitar mechanism in the continuous wind tunnel is the main form of realizing the change of the model's attitude angle. The current method of measuring the elastic angle coefficient of the support system is to load the support system by using weights to mount it vertically downward. The load only acts in the gravity direction of the support system. The structural form of the scimitar causes a difference in stiffness in the longitudinal and lateral directions. The lateral stiffness is about 1% of the longitudinal stiffness. Therefore, when the model rolls, the load on the model will have a lateral component after being transferred to the support system. Due to the difference in the longitudinal and lateral stiffness of the scimitar, the elastic deformation of the support system after being subjected to different lateral load components is different.

[0004] Therefore, it is urgent to propose a device and method for measuring the elastic angle coefficient of a continuous wind tunnel support system to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of deviation in the elastic angle measurement of the support system in the mode of realizing the model attitude angle by pitch and roll coupling linkage in the continuous wind tunnel. A brief overview of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0006] The technical solution of the present invention: Solution 1: A continuous wind tunnel support system elastic angle coefficient measuring device, including a support system, an elastic angle loading device and a test model. During the test, the elastic angle loading device loads the support system to obtain each roll angle γ and the elastic deformation of the inherent support part of the test section under each load step, and converts them into an elastic deformation angle, that is, an elastic angle; The support system includes a balance, a balance support rod, a test section support rod, and a scimitar mechanism. The test model is connected to the balance through a model flange and a balance front flange. The balance is installed on the balance support rod, the balance support rod is installed on the scimitar mechanism through the test section support rod, and the scimitar mechanism is installed on the elastic angle loading device.

[0007] Preferably, the scimitar mechanism comprises a scimitar body and a scimitar rolling mechanism, and the scimitar rolling mechanism is installed on the scimitar body.

[0008] Preferably: the elastic angle loading device comprises a base, a driving device, and a loading head. The base is provided with multiple roll angle positions. The driving device can be detachably installed at any roll angle position. The driving device is installed with a loading head. During the test, the test model is replaced with the loading head, that is, the load is connected to the front flange of the balance through the loading head flange. The balance is installed on the balance support rod, and the balance support rod is installed on the scimitar mechanism through the test section support rod; the test section support rod is provided with a first laser tracker measurement point, and the loading head is provided with a second laser tracker measurement point and an inclination sensor.

[0009] Solution 2: A method for measuring the elastic angle coefficient of a continuous wind tunnel support system is implemented based on a device for measuring the elastic angle coefficient of a continuous wind tunnel support system described in Solution 1, and includes the following steps: S1. Prepare the support system, connect the balance, balance support rod and test section support rod in sequence and install them on the machete mechanism; S2. Equipment installation and commissioning, including connection and commissioning of balance and data acquisition system, installation and commissioning of elastic angle loading device; S3, determine the load position of the balance; S4, design loading status table; S5, formal elastic angle loading, obtaining the rolling angle γ, load and elastic angle; S6, fitting the roll angle γ, load and elastic angle obtained by loading to obtain an elastic angle correction coefficient 14; S7. Verify the calculation results of the comprehensive elastic angle and verify the validity of the fitting formula.

[0010] Preferably: S2 includes: S21. Connect the balance to the data acquisition system, check the zero point and direction of the balance, confirm that the balance is in good condition, adjust the data acquisition software set in the data acquisition system to realize the real-time display function of the load of each element of the balance, and adjust the roll angle of the balance to 0°; S22, connecting the loading head to the front end of the balance, adjusting the rolling angle of the loading head to 0° through the inclination sensor, and then fixing the loading head; S23. Arrange the first laser tracker measurement point at the front end of the test section support rod, and arrange the second laser tracker measurement point on the loading head to ensure deformation measurement of the front end measurement position of the test section support rod and the loading head measurement position, start the laser tracker and test the measurement effect of the first laser tracker measurement point and the second laser tracker measurement point to ensure that the laser tracker can measure the first laser tracker measurement point and the second laser tracker measurement point.

[0011] Preferably: S3 includes: S31, determining the pitch moment Mz range and normal force Y range of the balance; S32. Under the premise of ensuring that the normal force Y is not overloaded, the maximum distance between the loading point and the balance center is designed to be Lmax. The balance center refers to the moment point after the balance is loaded, Lmax=Mzmax / Y 加 , Y 加 represents the maximum loading load during elastic angle loading, Mzmax represents the maximum pitching moment of the balance; S33. Determine the loading position of the loading head installed on the balance according to the loading position of the balance.

[0012] Preferably: S4 includes: According to the balance loading position determined in S3, determine Y 加 , between 0 and Y 加 Design step loading state table within the scope.

[0013] Preferably: S5 includes: S51. According to the loading position on the loading head, adjust the position of the base and the driving device in the X direction, select the roll angle as 0°, and complete the connection with the loading head.

[0014] S52, load the current roll angle position according to the loading state in the loading state table, and set Y γ , Mz γ , α γ Recorded in the loading status table, loaded twice.

[0015] S53, after completing the loading of the current roll angle position, disconnect the connection between the drive device and the base, adjust the drive device to the next roll angle position and connect it to the base, and adjust the roll angle of the support system to be the same as the roll angle of the next roll angle position through the scimitar mechanism.

[0016] S54, repeat S52 to S53 until the loading measurement at all rolling angles is completed.

[0017] Preferably: S6 includes: S631, normal fitting formula ; (5) Among them, K1, K2, K3, a are K γy ~γ is the coefficient in the fitting formula.

[0018] S632, lateral fitting formula ; (6) Preferably: S7 includes: S71, comprehensive elastic angle calculation Known comprehensive elastic angular coefficient K γy , K γz , K1, K2, K3, a and load-related parameters γ, Y, Mz, L T , Z, My.

[0019] Substitute γ, K1, K2, K3, and a into formula (5) to obtain K γy , K γz ; Y、Mz、L T Substitute Z and My into formula (1) and (2) to obtain Mw γy 、Mw γz ; K γ 、Mw γy 、Mw γz Substitute into formula (4) to obtain the comprehensive elastic angle α γy , α γz .

[0020] S72, Verification of comprehensive elastic angle calculation results S721, select a loading state in S5, and obtain γ, Y, Mz, α γ Parameters, elastic angle α is calculated by S71 γ计算 Compared with the measured value α measured in a certain loading state in S5 γ Perform comparative verification.

[0021] S722, select a load state that is not in the loading state table to load, and obtain γ, Y, Mz, α γ Parameters, elastic angle α is calculated by S71 method γ计算 Compared with the measured value α measured in a certain loading state in S5 γ Perform comparative verification.

[0022] The comparison verification standard of steps S721 and S722 is that the angle deviation between the calculated value and the measured value of the elastic angle is within 0.01°, which proves that the fitting formula is valid.

[0023] The present invention has the following beneficial effects: 1. The present invention solves the problem of deviation in elastic angle measurement under model angle of attack and sideslip angle conditions in the existing method of continuous wind tunnel using coupling linkage, thereby improving the accuracy of elastic angle measurement and thus improving the accuracy of model attitude angle; 2. The present invention takes advantage of the efficient operation mode of the continuous wind tunnel that can continuously blow air, and adopts the scimitar pitch mechanism and the scimitar roll mechanism of the scimitar mechanism to realize the automatic change of the sideslip angle and the angle of attack of the model through coupling and linkage, so as to realize the accurate measurement of the elastic angle coefficient of the support system, realize the engineering application of the elastic angle coefficient of the support system in the elastic angle solution of the wind tunnel test, and improve the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the support system of the present invention; Figure 2 It is a matching installation diagram of the balance front flange and the model flange of the present invention; Figure 3 is a matching installation diagram of the test model of the present invention when the rolling angle γ is 0°; Figure 4 is a matching installation diagram when the roll angle γ of the test model of the present invention is not 0°; Figure 5 It is a structural schematic diagram of the elastic angle loading device of the present invention; Figure 6 This is a diagram of the coordinated installation of the elastic angle loading device and the support system during the test of the present invention; Figure 7 It is a flow chart of a method for measuring elastic angle coefficient of a continuous wind tunnel support system of the present invention; In the figure, 1-support system, 2-elastic angle loading device, 3-test model, 11-balance, 111-balance front flange, 12-balance support rod, 13-test section support rod, 14-scimitar mechanism, 141-scimitar body, 142-scimitar rolling mechanism, 21-base, 22-driving device, 23-loading head, 231-loading head flange, 24-first laser tracker measurement point, 25-rolling angle position, 26-second laser tracker measurement point, 31-model flange. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0026] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection (i.e., non-detachable connection) includes but is not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but is not limited to conventional detachable methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: welding connection is selected for fixed connection, and hinge connection is selected for detachable connection.

[0027] Specific implementation method 1: Combination Figure 1-Figure 7 The present embodiment is described. A continuous wind tunnel support system elastic angle coefficient measuring device of the present embodiment comprises a support system 1, an elastic angle loading device 2 and a test model 3. During the test, the elastic angle loading device 2 loads the support system 1 to obtain each roll angle γ and the elastic deformation of the inherent support part of the test section under each load step, and converts them into an elastic deformation angle, i.e., an elastic angle. The support system 1 includes a balance 11, a balance support rod 12, a test section support rod 13, and a scimitar mechanism 14. The test model 3 is connected to the balance front flange 111 of the balance 11 through the model flange 31. The balance 11 is installed on the balance support rod 12. The balance support rod 12 is installed on the scimitar mechanism 14 through the test section support rod 13. The scimitar mechanism 14 is installed on the elastic angle loading device 2.

[0028] The support system 1 can be divided into the inherent support part of the test section and the part matched with different test items. The test section support rod 13 and the curved knife mechanism 14 are the inherent support part of the test section; the balance 11 and the balance support rod 12 are the parts matched according to the test requirements, referred to as the test matching support.

[0029] The scimitar mechanism 14 includes a scimitar body 141 and a scimitar rolling mechanism 142 , and the scimitar rolling mechanism 142 is installed on the scimitar body 141 .

[0030] The elastic angle loading device 2 includes a base 21, a driving device 22, and a loading head 23. The base 21 is provided with multiple roll angle positions 25. The driving device 22 can be detachably installed at any roll angle position 25. The driving device 22 is installed with the loading head 23. During the test, the test model 3 is replaced with the loading head 23, that is, the loading head 23 is connected to the front flange 111 of the balance through the loading head flange 231, the balance 11 is installed on the balance support rod 12, and the balance support rod 12 is installed on the scimitar mechanism 14 through the test section support rod 13; the test section support rod 13 is provided with a first laser tracker measurement point 24, and the loading head 23 is provided with a second laser tracker measurement point 26 and an inclination sensor.

[0031] The elastic deformation is fitted to obtain the fitting formula between the inherent support part γ of the test section, the elastic angle and the load, and then the unique elastic angle correction coefficient of the inherent support part is obtained. The load acting on the entire support system 1 is measured by the balance 11, and the deformation of the support system 1 after being loaded is measured by the first laser tracker measuring point 24 and the second laser tracker measuring point 26 to obtain the elastic angle. During the fitting process, the load is converted into a torque acting on the front end surface of the test section support rod 13, and the elastic angle is the elastic angle in the direction of the load N applied to the support system 1 by the comprehensive support device, such as Figure 3 .

[0032] Since the inconsistency of the elastic deformation of the support system 1 under longitudinal and lateral loads is caused by the difference in longitudinal and lateral stiffness of the scimitar mechanism 14, and has nothing to do with the balance 11 and the balance support rod 12, the elastic deformation of the two parts of the support system 1 can be measured separately, and the deformation of the test matching support part is only related to the load of the test model 3, and has nothing to do with the roll angle γ of the test model 3. Therefore, the elastic deformation of this part measured can represent its elastic angle at any roll angle γ of the test model 3; The inherent support part of the test section needs to be subjected to elastic angle measurement under different roll angles γ (i.e., comprehensive elastic angle measurement), and finally the elastic angle of the two parts of the support is superimposed to obtain the elastic angle of the entire support system 1. Comprehensive loading is only performed on the inherent support part. Under the premise that the inherent support part does not undergo structural changes that cause changes in characteristics such as stiffness, it does not need to be loaded again. Therefore, loading the parts of the support system 1 separately can save time and effort. The roll elastic deformation generated by the support system 1 after the roll moment is irrelevant to the loading direction of the scimitar mechanism 14, so the roll elastic angle of the support system 1 can be measured using existing methods.

[0033] Specific implementation method 2: Combination Figure 1-Figure 7 This embodiment is described. A method for measuring elastic angle coefficient of a continuous wind tunnel support system in this embodiment is implemented based on a device for measuring elastic angle coefficient of a continuous wind tunnel support system described in the first embodiment, and includes the following steps: S1, support system preparation, the balance 11, balance support rod 12 and test section support rod 13 are connected in sequence and installed on the scimitar mechanism 14; The test section support rod 13 is installed at the front end of the curved knife mechanism 14 , the balance support rod 12 is installed at the front end of the test section support rod 13 , and the balance 11 is installed at the front end of the balance support rod 12 .

[0034] S2, equipment installation and debugging, including the connection and debugging of the balance 11 and the data acquisition system, and the installation and debugging of the elastic angle loading device 2; S3, determine the loading position of the balance 11; S4, design loading status table; S5, formal elastic angle loading, obtaining the rolling angle γ, load and elastic angle; S6, fitting the roll angle γ, load and elastic angle obtained by loading to obtain correlation coefficients such as elastic angle correction coefficient; S7. Verify the calculation results of the comprehensive elastic angle and verify the validity of the fitting formula.

[0035] The S2 includes: S21, connect the balance 11 to the data acquisition system, check the zero point of the balance 11, the direction of the balance 11, confirm that the balance 11 is in good condition, adjust the data acquisition software set in the data acquisition system to realize the real-time display function of each element load of the balance 11, and adjust the roll angle of the balance 11 to 0°; S22, connecting the loading head 23 to the front end of the balance 11, adjusting the rolling angle of the loading head 23 to 0° through the inclination sensor, and then fixing the loading head 23; S23. Arrange a first laser tracker measurement point at the front end of the test section support rod 13, and arrange a second laser tracker measurement point on the loading head 23 to ensure deformation measurement of the front end measurement position of the test section support rod 13 and the measurement position of the loading head 23, start the laser tracker and test the measurement effects of the first laser tracker measurement point 24 and the second laser tracker measurement point 26 to ensure that the laser tracker can measure the first laser tracker measurement point 24 and the second laser tracker measurement point 26.

[0036] The S3 includes: S31, determining the pitch moment Mz range and the normal force Y range of the balance 11; S32. Under the premise of ensuring that the normal force Y is not overloaded, the maximum distance between the loading point and the center of the balance 11 is designed to be Lmax. The center of the balance 11 refers to the moment point of the moment after the balance 11 is loaded, Lmax=Mzmax / Y 加 , Y 加 represents the maximum loading load during the elastic angle loading process, Mzmax represents the maximum pitching moment of the balance 11; S33 . Determine the loading position of the loading head 23 installed on the balance 11 according to the loading position of the balance 11 .

[0037] The S4 includes: According to the balance loading position determined in S3, determine Y 加 , between 0 and Y 加 Design step loading state table within the scope.

[0038] Y 加 Taking 20000N as an example, the loading state table can be designed as shown in Table 1. In the table, Y is the nominal loading load, Y γ and Mzγ is the force and moment actually felt by the balance collected by the vegetable system after the loading mechanism is loaded near the nominal load and stabilized, α γ is the angle measured at the test section support rod measurement position under the current loading state, and γ is the roll angle, such as Figure 3 The loading device is designed with 10 loading roll angle loading positions, ranging from 0° to 90°, with an interval of 10°, where x is the specific value of γ. Each γ position is loaded twice.

[0039] Table 1 Loading status table

[0040] The S5 includes: S51 , according to the loading position on the loading head 23 , adjust the positions of the base 21 and the driving device 22 in the X direction, select the roll angle as 0°, and complete the connection with the loading head 23 .

[0041] S52, load the current roll angle position 25 according to the loading state in the loading state table, and set Y γ , Mz γ , α γ Recorded in the loading status table, loaded twice.

[0042] S53, after completing the loading of the current roll angle position 25, disconnect the connection between the drive device 22 and the base 21, adjust the drive device 22 to the next roll angle position 25 and connect it to the base 21, and adjust the roll angle of the support system 1 to be the same as the roll angle of the next roll angle position 25 through the scimitar mechanism 14.

[0043] S54, repeat S52 to S53 until the loading measurement at all rolling angles is completed.

[0044] The S6 includes: S61. The force and moment measured by the balance 11 are converted into the moment received by the front end of the test section support rod 13. The moment of the front end of the test section support rod 13 at each rolling angle γ is obtained by conversion. The conversion formula is as follows: (1) Among them, Mw γ is the moment (Nm) received by the front end of the test section support rod 13 at angle γ, Y is the normal force (N) felt by the balance 11 at angle γ, Mz is the normal moment (Nm) felt by the balance 11 at angle γ, L T is the distance (m) between the center of the balance 11 and the front end surface of the test section support rod 13.

[0045] (2) Wherein, Z is the lateral force (N) felt by the balance 11 at the angle γ, and My is the lateral moment (Nm) felt by the balance 11 at the angle γ.

[0046] S62, obtaining the elastic angle coefficient K at each rolling angle γ γ For each rolling angle γ, the moment Mw at the front end of the test section support rod 13 is γ and elastic angle α γ Establish a fitting relationship, the fitting formula is as follows (3) Among them, α γ is the elastic angle caused by the load on the front end of the test section support rod 13 at angle γ, K γ is the elastic angle fitting coefficient of the front end of the test section support rod 13 at angle γ.

[0047] α γ and Mw γ are all relative increments on a basic value, so in practical applications only K γ The constant term b has no use meaning. The actual formula used is (4) S63. Obtaining γ and K γ Fitting coefficients; For γ and K γ Perform a third-order polynomial fit to obtain the fitting formula, which is as follows: S631, normal fitting formula ; (5) Among them, K1, K2, K3, a are K γ ~γ is the coefficient in the fitting formula.

[0048] S632, lateral fitting formula ; (6) This embodiment only measures and fits the elastic angle caused by the elastic deformation in the normal and lateral directions of the balance.

[0049] The S7 includes: S71, comprehensive elastic angle calculation Known comprehensive elastic angular coefficient K γy , K γz、 K1, K2, K3, a and load-related parameters γ, Y, Mz, L T , Z, My.

[0050] Substitute γ, K1, K2, K3, and a into formula (5) to obtain K γy , K γz ; Y、Mz、L T Substitute Z and My into formula (1) and (2) to obtain Mw γy 、Mw γz ; K γy , K γz 、Mw γy 、Mw γz Substitute into formula (4) to obtain the comprehensive elastic angle α γy , α γz .

[0051] S72, Verification of comprehensive elastic angle calculation results S721, select a loading state in S5, and obtain γ, Y, Mz, α γ Parameters, elastic angle α is calculated by S71 γ计算 Compared with the measured value α measured in a certain loading state in S5 γ Perform comparative verification.

[0052] S722, select a load state that is not in the loading state table to load, and obtain γ, Y, Mz, α γ Parameters, elastic angle α is calculated by S71 method γ计算 Compared with the measured value α measured in a certain loading state in S5 γ Perform comparative verification.

[0053] The comparison verification standard of steps S721 and S722 is that the angle deviation between the calculated value and the measured value of the elastic angle is within 0.01°, which proves that the fitting formula is valid.

[0054] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be arranged and combined, and those skilled in the art can exhaust all possibilities based on the mathematical knowledge of arrangement and combination. Therefore, the present invention will no longer describe the technical solutions after arrangement and combination one by one, but it should be understood that the technical solutions after arrangement and combination have been disclosed by the present invention.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A continuous wind tunnel support system elastic angle coefficient measuring device, characterized in that: The method comprises a support system (1), an elastic angle loading device (2) and a test model (3). During the test, the elastic angle loading device (2) loads the support system (1) to obtain elastic deformations of the inherent support part of the test section at each rolling angle γ and each load step, and converts them into elastic deformation angles, i.e., elastic angles. The support system (1) comprises a balance (11), a balance support rod (12), a test section support rod (13), and a scimitar mechanism (14); the test model (3) is connected to a balance front flange (111) of the balance (11) via a model flange (31); the balance (11) is mounted on the balance support rod (12); and the balance support rod (12) is mounted on the scimitar mechanism (14) via the test section support rod (13).

2. The elastic angle coefficient measuring device of a continuous wind tunnel support system according to claim 1, characterized in that: The scimitar mechanism (14) comprises a scimitar body (141) and a scimitar rolling mechanism (142); the scimitar rolling mechanism (142) is mounted on the scimitar body (141).

3. The elastic angle coefficient measuring device of a continuous wind tunnel support system according to claim 2, characterized in that: The elastic angle loading device (2) comprises a base (21), a driving device (22), and a loading head (23); the base (21) is provided with a plurality of rolling angle positions (25); the driving device (22) can be detachably mounted at any rolling angle position (25); the driving device (22) is provided with a loading head (23); during a test, the test model (3) is replaced with the loading head (23); the loading head (23) is connected to a front flange (111) of a balance (11) via a loading head flange (231); the balance (11) is mounted on a balance support rod (12); the balance support rod (12) is mounted on a scimitar mechanism (14) via a test section support rod (13); a first laser tracker measuring point (24) is provided on the test section support rod (13); a second laser tracker measuring point (26) and an inclination sensor are provided on the loading head (23).

4. A method for measuring elastic angle coefficient of a continuous wind tunnel support system, which is realized by relying on a device for measuring elastic angle coefficient of a continuous wind tunnel support system as claimed in claim 3, and is characterized in that: The following steps are involved: S1. Prepare the support system by sequentially connecting the balance (11), balance support rod (12) and test section support rod (13) and installing them on the scimitar mechanism (14); S2. Equipment installation and commissioning, including connection commissioning between the balance (11) and the data acquisition system, and installation and commissioning of the elastic angle loading device (2); S3, determining the loading position of the balance (11); S4, design loading status table; S5, formal elastic angle loading, obtaining the rolling angle γ, load and elastic angle; S6, fitting the roll angle γ, load and elastic angle obtained by loading to obtain an elastic angle correction coefficient; S7. Verify the calculation results of the comprehensive elastic angle and verify the validity of the fitting formula.

5. The method for measuring the elastic angle coefficient of a continuous wind tunnel support system according to claim 4, characterized in that: The S2 includes: S21, connecting the balance (11) to the data acquisition system, checking the zero point of the balance (11) and the direction of the balance (11), confirming that the balance (11) is in good condition, adjusting the data acquisition software set in the data acquisition system to realize the real-time display function of each element load of the balance (11), and adjusting the roll angle of the balance (11) to 0°; S22, connecting the loading head (23) to the front end of the balance (11), adjusting the roll angle of the loading head (23) to 0° using the inclination sensor, and then fixing the loading head (23); S23, arranging a first laser tracker measurement point at the front end of the test section support rod (13), arranging a second laser tracker measurement point on the loading head (23), ensuring deformation measurement of the front end measurement position of the test section support rod (13) and the measurement position of the loading head (23), starting the laser tracker and testing the measurement effect of the first laser tracker measurement point (24) and the second laser tracker measurement point (26), ensuring that the laser tracker can achieve measurement of the first laser tracker measurement point (24) and the second laser tracker measurement point (26).

6. A method for measuring elastic angle coefficient of a continuous wind tunnel support system according to claim 5, characterized in that: The S3 includes: S31, determining the pitch moment Mz range and the normal force Y range of the balance (11); S32. On the premise that the normal force Y is not overloaded, the maximum distance between the loading point and the center of the balance (11) is designed to be Lmax. The center of the balance (11) refers to the moment point of the moment after the balance (11) is loaded, Lmax=Mzmax / Y 加 , Y 加 represents the maximum loading load during elastic angular loading, Mzmax represents the maximum pitching moment of the balance (11); S33, determining the loading position of the loading head (23) installed on the balance (11) according to the loading position of the balance (11).

7. A method for measuring elastic angle coefficient of a continuous wind tunnel support system according to claim 6, characterized in that: The S4 includes: According to the balance loading position determined in S3, determine Y 加 , between 0 and Y 加 Design step loading state table within the scope.

8. The method for measuring the elastic angle coefficient of a continuous wind tunnel support system according to claim 7, characterized in that: The S5 includes: S51, according to the loading position on the loading head (23), adjust the position of the base (21) and the driving device (22) in the X direction, select the rolling angle as 0° position, and complete the connection with the loading head (23); S52, load the current roll angle position (25) according to the loading state in the loading state table, and change Y γ , Mz γ , α γ Recorded in the loading status table, loaded twice; S53, after the current roll angle position (25) is loaded, the connection between the drive device (22) and the base (21) is disconnected, the drive device (22) is adjusted to the next roll angle position (25) and connected to the base (21), and the roll angle of the support system (1) is adjusted to be the same as the roll angle of the next roll angle position (25) through the scimitar mechanism (14); S54, repeat S52 to S53 until the loading measurement at all rolling angles is completed.

9. A method for measuring elastic angle coefficient of a continuous wind tunnel support system according to claim 8, characterized in that: The S6 includes: S61. The force and moment measured by the balance (11) are converted into the moment received by the front end of the test section support rod (13). The moment of the front end of the test section support rod (13) at each rolling angle γ is obtained by conversion. The conversion formula is as follows: (1) Among them, Mw γ is the moment (Nm) received by the front end of the test section support rod (13) at angle γ, Y is the normal force (N) felt by the balance (11) at angle γ, Mz is the normal moment (Nm) felt by the balance (11) at angle γ, L T is the distance between the center of the balance (11) and the front end of the test section support rod (13) (m); (2) Wherein, Z is the lateral force felt by the balance (11) at angle γ (N), My is the lateral moment felt by the balance (11) at angle γ (Nm); S62, obtaining the elastic angle coefficient K at each rolling angle γ γ The moment Mw at the front end of the test section support rod (13) at each rolling angle γ γ and elastic angle α γ Establish a fitting relationship, the fitting formula is as follows (3) Among them, α γ is the elastic angle caused by the load on the front end of the test section support rod (13) at angle γ, K γ is the elastic angle fitting coefficient of the front end of the test section support rod (13) at angle γ; α γ and Mw γ are all relative increments on a basic value, so in practical applications only K γ The constant term b has no use meaning. The actual formula used is (4) S63. Obtaining γ and K γ Fitting coefficients; For γ and K γ Perform a third-order polynomial fit to obtain the fitting formula, which is as follows: S631, normal fitting formula ； (5) Among them, K1, K2, K3, a are K γy ~γ coefficient in the fitting formula; S632, lateral fitting formula ； (6)。 10. A method for measuring elastic angle coefficient of a continuous wind tunnel support system according to claim 9, characterized in that: The S7 includes: S71, comprehensive elastic angle calculation Known comprehensive elastic angular coefficient K γy , K γz , K1, K2, K3, a and load-related parameters γ, Y, Mz, L T ,Z,My; Substitute γ, K1, K2, K3, and a into formula (5) to obtain K γy , K γz ; Y、Mz、L T Substitute Z and My into formula (1) and (2) to obtain Mw γy 、Mw γz ; K γ 、Mw γy 、Mw γz Substitute into formula (4) to obtain the comprehensive elastic angle α γy , α γz； S72, Verification of comprehensive elastic angle calculation results S721, select a loading state in S5, and obtain γ, Y, Mz, α γ Parameters, elastic angle α is calculated by S71 γ计算 Compared with the measured value α measured in a certain loading state in S5 γ Conduct comparative verification; S722, select a load state that is not in the loading state table to load, and obtain γ, Y, Mz, α γ Parameters, elastic angle α is calculated by S71 method γ计算 Compared with the measured value α measured in a certain loading state in S5 γ Conduct comparative verification; The comparison verification standard of steps S721 and S722 is that the angle deviation between the calculated value and the measured value of the elastic angle is within 0.01°, which proves that the fitting formula is valid.

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