CN111207902A - Method for initializing installation data of wind tunnel balance single-vector multi-element calibration loading sleeve - Google Patents
Method for initializing installation data of wind tunnel balance single-vector multi-element calibration loading sleeve Download PDFInfo
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- CN111207902A CN111207902A CN202010055312.8A CN202010055312A CN111207902A CN 111207902 A CN111207902 A CN 111207902A CN 202010055312 A CN202010055312 A CN 202010055312A CN 111207902 A CN111207902 A CN 111207902A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
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- G01M9/062—Wind tunnel balances; Holding devices combined with measuring arrangements
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to a method for initializing the installation data of a wind tunnel balance single vector multi-element calibration loading sleeve, which comprises the following steps of 1) adjusting the wind tunnel balance to pitch 0 degree and roll 0 degree; 2) acquiring balance axial force component output under different pitching and rolling angles; 3) taking the pitching and rolling angles as horizontal coordinates, outputting the components of the axial force and the lateral force of the balance as vertical coordinates to draw a curve, performing sextic polynomial fitting on the curve, and obtaining a derivative of a formula; 4) interpolating the derived formula to find the angle corresponding to the minimum value; 5) repeating the operations at intervals of 5 degrees to obtain pitching and rolling installation deviation angles of the balance attitude measurement component corresponding to the rolling and pitching at intervals of 5 degrees; 6) obtaining a formula of the change of the pitching and rolling installation deviation angles of the balance attitude measurement component along with the change of the rolling and pitching angles according to the fitted curve; the invention has the advantage of providing a data base for system error correction and high-precision balance attitude measurement.
Description
Technical Field
The invention relates to the technical field of wind tunnel balance experiment methods, in particular to a wind tunnel balance single-vector multi-element calibration loading sleeve installation data initialization method.
Background
The single-vector multi-element calibration means that a vector load is applied to the wind tunnel balance, and the vector load is decomposed on the wind tunnel balance body axis system by changing the relative direction of the balance body axis system and the vector load and the position of a load action point to generate the required six-component load. Compared with the traditional wind tunnel balance multivariate calibration device with a plurality of force application units, the single vector multivariate calibration device has fewer error sources because of only one force application source, and has simpler structure and control and lower cost. Under the condition of small difference of the equipment capability indexes, the manufacturing cost is generally about 20 percent or lower of that of the traditional multi-element calibration equipment.
In practical application, when the single-vector multi-element loading sleeve is installed on the wind tunnel balance, because certain errors inevitably exist in all assembling relations, and the errors can cause system errors in calibration data of the wind tunnel balance, the errors need to be found out through a certain method and a series of operations before the wind tunnel balance is calibrated, and the process is initialized for the installation data of the wind tunnel balance loading sleeve.
Therefore, in order to overcome the defects, the method for initializing the installation data of the wind tunnel balance single-vector multi-element calibration loading sleeve needs to be provided
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem of how to eliminate the assembly error of the loading sleeve during installation.
(II) technical scheme
In order to solve the technical problem, the invention provides a wind tunnel balance single-vector multi-element calibration loading sleeve installation data initialization method, which comprises the steps of determining and calibrating a pitching installation deviation angle and a rolling installation deviation angle of a balance attitude measurement component,
determining and calibrating a pitching installation deviation angle of a balance attitude measurement component;
1) adjusting the wind tunnel balance to roll for 0 degree by taking the output angle of the balance attitude measurement component as a reference;
2) locking a balance attitude control device, enabling the pitching angle of the wind tunnel balance to generate different changes through a positioning component, and simultaneously collecting balance axial force component output at different pitching angles;
3) taking the pitching angle as a horizontal coordinate and the balance axial force component output as a vertical coordinate, drawing a curve, performing sextic polynomial fitting on the curve to obtain a fitting formula, and performing derivation on the fitting formula;
4) interpolating the derived formula with a resolution of 0.01 degrees to find an angle delta α corresponding to the minimum value, wherein the angle is a pitching installation deviation angle of the balance attitude measurement component when the roll angle is 0 degrees;
5) adjusting the rolling attitude of the wind tunnel balance through the balance attitude control device, and repeating the operation at a rolling angle of 0-360 degrees at intervals of 5 degrees to obtain the pitching installation deviation angle of the balance attitude measurement component corresponding to the rolling angle at intervals of 5 degrees;
6) fitting a curve of the change of the pitch installation deviation angle of the balance attitude measurement component along with the change of the roll angle according to a cubic polynomial to obtain a formula delta α of the change of the pitch installation deviation angle of the balance attitude measurement component along with the change of the roll angleγ＝f(γ)；
7) In actual calibration, the formula Δ α is usedγF (gamma) and the formula of the change of the roll installation deviation angle of the balance attitude measurement component along with the pitch angle delta gammaαF (α), calculating and obtaining the pitch installation deviation angle of the balance attitude measurement component in the current state for correction;
determining and calibrating the roll installation deviation angle of the balance attitude measurement component;
1) adjusting the wind tunnel balance to pitch 0 degrees and roll 0 degrees by taking the output angle of the balance attitude measurement component as a reference;
2) locking the position adjusting part, enabling the roll angle of the wind tunnel balance to generate different changes through a balance attitude control device, and simultaneously acquiring balance lateral force component outputs under different roll angles;
3) taking the roll angle as a horizontal coordinate, outputting a balance lateral force component as a vertical coordinate, drawing a curve, performing sextic polynomial fitting on the curve to obtain a fitting formula, and performing derivation on the fitting formula;
4) interpolating the derived formula with a resolution of 0.01 degrees, and finding an angle delta gamma corresponding to the minimum value, wherein the angle is a rolling installation deviation angle of the balance attitude measurement component when the pitching is 0 degree;
5) the pitching attitude of the balance is adjusted through the positioning component, and the operation is repeated at intervals of 5 degrees within the range of-10-45 degrees in pitching, so that the rolling installation deviation angle of the balance attitude measuring component corresponding to every 5 degrees in pitching is obtained;
6) fitting a curve of the roll installation deviation angle of the balance attitude measurement component changing along with the pitch angle according to a cubic polynomial to obtain a formula delta gamma of the roll installation deviation angle of the balance attitude measurement component changing along with the pitch angleα＝f(α)；
7) In actual calibration, through the formula Δ γαF (α) and the formula of the change of the pitch installation deviation angle of the balance attitude measurement component with the pitch angle delta αγAnd f (gamma) calculating to obtain the roll installation deviation angle of the balance attitude measurement component in the current state for correction.
As a further explanation of the present invention, it is preferable that the change of the pitch angle adjusts the attitude of the balance in accordance with the pitch angles (-10 °, -5 °, -4 °, -3 °, -2 °, -1 °, 0 °, 1 °, 2 °, 3 °, 4 °, 5 °, 10 °, 20 °, 30 °, 40 °) in this order.
As a further illustration of the invention, it is preferred that the roll angle is adjusted in turn in balance attitude according to roll angle (-95 °, -90 °, -85 °, -80 °, -75 °, -70 °, -65 °, -60 °, -50 °, -40 °, -30 °, -20 °, -10 °, 0 °, 10 °, 20 °, 30 °, 40 °, 50 °, 60 °, 65 °, 70 °, 75 °, 80 °, 85 °, 90 °, 95 °.
As a further illustration of the invention, the roll mounting deviation angle of the attitude measurement component of the balance is also preferably determined and calibrated by, in particular,
1) adjusting the wind tunnel balance to pitch 0 degrees and roll 0 degrees by taking the output angle of the balance attitude measurement component as a standard;
2) locking the pitching motion of the balance on a balance posture control device, adjusting the balance posture according to the roll angle (-10 degrees, 0 degrees and 10 degrees) in sequence, and collecting the output of the lateral force component of the balance;
3) carrying out linear fitting on the obtained data to obtain a formula y1＝k1x；
4) Adjusting the attitude of the wind tunnel balance according to the roll angle (170 degrees, 180 degrees and 190 degrees) in sequence, and collecting the lateral force component output of the balance;
5) linear fitting is carried out on the data obtained this time to obtain a formula y2＝k2x；
6) Calculating two formulas y1＝k1x and y2＝k2x abscissa of intersection x0Then x0The roll installation deviation angle of the balance attitude measurement component when the pitch is 0 degrees;
7) adjusting the pitching attitude of the wind tunnel balance, and repeating the operation at every 5 degrees within the pitching-10-45-degree range to obtain the rolling installation deviation angle of the balance attitude measurement component corresponding to the pitching every 5 degrees;
8) fitting a curve of the roll installation deviation angle of the balance attitude measurement component changing along with the pitch angle according to a sextic polynomial to obtain a formula of the roll installation deviation angle of the balance attitude measurement component changing along with the pitch angle;
9) in actual calibration, through the formula Δ γαF (α) and the formula of the change of the pitch installation deviation angle of the balance attitude measurement component with the pitch angle delta αγAnd f (gamma) calculating to obtain the roll installation deviation angle of the balance attitude measurement component in the current state for correction.
As a further explanation of the present invention, preferably, one end of the wind tunnel balance is fixedly connected with a support rod, an axis of the support rod is overlapped with an axis of the wind tunnel balance, and one end of the support rod is connected with the balance attitude control device, so that the wind tunnel balance rotates along the axis.
As a further description of the present invention, preferably, the balance attitude measurement component includes a mounting seat, a pitch angle accelerometer, a first roll angle accelerometer, and a second roll angle accelerometer, the mounting seat is fixedly connected to the inner ring of the loading sleeve, the pitch angle accelerometer is fixedly connected to the front end face of the mounting seat, the first roll angle accelerometer is fixedly connected to the upper end face of the mounting seat, the second roll angle accelerometer is fixedly connected to the measuring end face of the mounting seat, wherein the axis of the pitch angle accelerometer is parallel to the axis of the wind tunnel balance, and the axes of the first roll angle accelerometer and the second roll angle accelerometer are perpendicular to each other and perpendicular to the axis of the wind tunnel balance.
As a further illustration of the present invention, it is preferred that the method further comprises the step of determining the position of the balance pitching moment component center on the axial distance measuring device, as follows,
1) adjusting the wind tunnel balance to pitch 0 degrees and roll 0 degrees, and locking the relative transverse movement between the loading sleeve middle ring and the loading sleeve outer ring and the loading sleeve inner ring;
2) moving the outer ring of the loading sleeve to a certain point on the inner ring of the loading sleeve, locking the outer ring of the loading sleeve through the baffle ring, adjusting the pitching angle of the balance to 0 degree, and measuring the position data of the outer ring of the loading sleeve to be a through the axial distance measuring device1And collecting balance pitching moment output data b1；
3) Adjusting the attitude of the wind tunnel balance to roll 180 degrees, and collecting the output data b of the pitching moment of the balance2；
4) Adjusting the attitude of the wind tunnel balance to 0 degrees, moving the outer ring of the loading sleeve to another point on the inner ring of the loading sleeve, locking the outer ring of the loading sleeve through the baffle ring, adjusting the pitching angle of the wind tunnel balance to 0 degrees, and measuring the position data of the outer ring of the loading sleeve to be a through the axial distance measuring device2And collecting balance pitching moment output data b3；
5) Adjusting the attitude of the wind tunnel balance to roll 180 degrees, and collecting the output data b of the pitching moment of the balance4；
6) Respective Linear fitting of data (a)1，a2；b1，b3) And (a)1，a2；b2，b4) And obtaining two linear equations, and solving the abscissa value of the intersection point of the two straight lines to obtain the position reading of the pitching moment electric center on the axial distance measuring device.
As a further illustration of the present invention, it is preferred that the method further comprises the step of determining the position of the yaw moment component center of the balance on the axial distance measuring device, as follows,
1) adjusting the wind tunnel balance to pitch 0 degrees and roll 90 degrees, and locking the relative transverse movement between the loading sleeve middle ring and the loading sleeve outer ring and the loading sleeve inner ring;
2) moving the outer ring of the loading sleeve to a certain point on the inner ring of the loading sleeve, locking the outer ring of the loading sleeve through the baffle ring, adjusting the pitching angle of the balance to 0 degree, and measuring the position data of the outer ring of the loading sleeve to be a through the axial distance measuring device1And collecting balance yaw moment output data b1；
3) Adjusting the attitude of the wind tunnel balance to roll 270 degrees, and collecting the output data b of the pitching moment of the balance2；
4) Adjusting the balance posture to 0 degree, moving the outer ring of the loading sleeve to another point on the inner ring of the loading sleeve, locking the outer ring of the loading sleeve through the baffle ring, adjusting the pitching angle of the balance to 0 degree, and measuring the position data of the outer ring of the loading sleeve to be a through the axial distance measuring device2And collecting balance yaw moment output data b3；
5) Adjusting the attitude of the wind tunnel balance to roll 270 degrees, and collecting yaw moment output data b of the balance4；
6) Respective Linear fitting of data (a)1，a2；b1，b3) And (a)1，a2；b2，b4) And obtaining two linear equations, and solving the abscissa value of the intersection point of the two straight lines to obtain the position reading of the yaw moment electric center on the axial distance measuring device.
As a further illustration of the invention, it is preferred that the method further comprises determining the position of the center of the roll torque component of the balance on the lateral scale by, for example,
1) adjusting the wind tunnel balance to pitch 0 degrees and roll 0 degrees, and locking the relative axial movement between the loading sleeve middle ring and the loading sleeve outer ring and the loading sleeve inner ring;
2) transversely moving the outer ring of the loading sleeve to a certain point, adjusting the rolling angle of the balance to 0 degree, and reading the reading a of the gauge head of the transverse scale1And collecting balance rolling torque output data b1；
3) Adjusting the attitude of a wind tunnel balance to roll 180 degrees, and acquiring balance pitching moment output data b2；
4) Adjusting the attitude of the wind tunnel balance to 0 degrees, transversely moving the outer ring of the loading sleeve to another point, adjusting the pitching angle of the balance to 0 degrees, and reading the reading a of the gauge head of the transverse scale2And collecting balance rolling torque output data b3；
5) Adjusting the attitude of the wind tunnel balance to roll 180 degrees, and collecting the roll torque output data b of the balance4；
6) Respective Linear fitting of data (a)1，a2；b1，b3) And (a)1，a2；b2，b4) And obtaining two linear equations, and solving the horizontal coordinate value of the intersection point of the two straight lines to obtain the position reading of the roll torque electric core on the transverse scale.
As a further explanation of the present invention, preferably, the axial distance measuring device includes a lead screw, a moving block and a grating ruler, the lead screw is rotatably connected to the base, the moving block is connected to the lead screw in a threaded manner, the grating ruler is fixedly connected to the moving block, the length direction of the grating ruler is perpendicular to the length direction of the lead screw, one end of the grating ruler close to the loading sleeve is fixedly connected with a micrometer, and a gauge head of the micrometer abuts against the loading sleeve.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
according to the method, the initial installation data of the single-vector multi-element loading sleeve is accurately obtained by providing the pitching deviation angle for installing the balance attitude measurement component and the rolling deviation angle for installing the two balance attitude measurement components, the method for obtaining the installation data of the single-vector multi-element loading sleeve is supplemented, a data base is provided for system error correction and high-precision measurement of the balance attitude, and the precision of input load decomposition calculation in single-vector multi-element calibration is improved.
Drawings
FIG. 1 is a view showing the effect of the loading sleeve installation of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1;
FIG. 3 is a view showing the configuration of an attitude measuring section of the balance of the present invention;
FIG. 4 is a schematic diagram of the generation of the component pitch misalignment angle;
FIG. 5 is a schematic diagram of the generation of the roll mounting deviation angle for each component.
In the figure: 1. a base; 11. a strut; 12. a wind tunnel balance; 2. an outer ring of the loading sleeve; 21. sleeving an outer ring; 22. sleeving an inner ring; 3. loading a middle ring of the sleeve; 31. a baffle ring; 4. loading the inner ring of the sleeve; 5. the lower hem of the loading sleeve; 51. a transverse bearing; 52. a loading connection end; 6. a balance attitude measurement component; 61. a mounting seat; 62. a pitch angle accelerometer; 63. a first roll angle accelerometer; 64. a second roll angle accelerometer; 7. a lateral scale; 8. a positioning component; 81. an adjusting disk; 82. a regulator; 9. an axial distance measuring device; 91. a lead screw; 92. a motion block; 93. a grating scale; 94. and (5) a dial indicator.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
A wind tunnel balance single vector multi-element calibration loading sleeve installation data initialization method is combined with a graph 1 and a graph 2, the single vector multi-element calibration loading sleeve comprises a base 1, a loading sleeve outer ring 2, a loading sleeve middle ring 3, a loading sleeve inner ring 4, a loading sleeve lower hem 5, a balance posture measuring component 6, a transverse scale 7, a position adjusting component 8 and an axial distance measuring device 9, the loading sleeve middle ring 3 is inserted into the loading sleeve outer ring 2, the loading sleeve inner ring 4 is connected into the loading sleeve middle ring 3 in a sliding mode, the loading sleeve lower hem 5 is connected onto the loading sleeve outer ring 2 in a rotating mode, the balance posture measuring component 6 is fixedly connected onto the loading sleeve inner ring 4, the transverse scale 7 is erected on the loading sleeve outer ring 2, and the position adjusting component 8 and the axial distance measuring device 9 are both erected on the base 1.
Referring to fig. 1 and 2, the positioning component 8 includes an adjusting disk 81 and an adjuster 82, the adjusting disk 81 is a sector plate, a rack is arranged on the outer arc surface of the adjusting disk 81, the two adjusting disks 81 are hinged at the rear end of the base 1 at intervals, a balance attitude control device is fixedly connected between the adjusting disks 81, the balance attitude control device includes a housing and a motor, wherein the housing is fixedly connected with the adjusting disk 81, the motor is fixedly connected in the housing, the output end of the motor is rotatably connected with a supporting rod 11, one end of the supporting rod 11 is fixedly connected with a wind tunnel balance 12, the axis of the supporting rod 11 is coincident with the axis of the wind tunnel balance 12, the balance 12 is fixedly connected with the loading sleeve inner ring 4, and the balance attitude control device is arranged to enable the wind; regulator 82 cup joints outside the excircle terminal surface of adjusting disk 11 and links firmly with base 1, and the regulator 82 internal rotation is connected with the gear and with the rack toothing on the adjusting disk 81, utilizes regulator 82 to control the rotation of adjusting disk 81 on base 1 to the effect of carrying out pitching motion on the vertical face of control wind-tunnel balance 12 is realized.
Referring to fig. 1 and 2, the loading sleeve outer ring 2 comprises an outer ring 21 and an inner ring 22, the inner ring 22 is rotatably connected in the outer ring 21, two sides of the outer ring 21 are rotatably connected with transverse bearings 51, a loading sleeve lower hem 5 is rotatably connected with the transverse bearings 51, the loading sleeve lower hem 5 is a U-shaped frame, a loading connecting end 52 is arranged in the middle of the bottom end of the loading sleeve lower hem 5, a hanging rope is fixedly connected onto the loading connecting end 52, a tray capable of placing weights is arranged at the bottom of the hanging rope to realize loading of the wind tunnel balance 12, a groove is arranged at the bottom of the loading sleeve lower hem 5, a bubble level gauge is inserted into the groove, the mass of the hollowed groove is the same as the mass of the bubble level gauge, the bubble level gauge is arranged to ensure that the gravity center direction of the loading sleeve lower hem 5 and the axial direction of the wind tunnel balance 12 are positioned on the same vertical plane, the mass of the hollowed groove is the same as the mass, the lower pendulum 5 of the loading sleeve does not deflect due to gravity center shift, the rotation and static positions of the outer ring 2 of the loading sleeve can be measured and adjusted, and the measurement precision can reach 2'.
With reference to fig. 1 and 2, the loading sleeve middle ring 3 is in a square ring shape, the inner ring 22 of the loading sleeve is sleeved outside the loading sleeve middle ring 3, the inner hole of the loading sleeve middle ring 3 is also in a square shape, the loading sleeve inner ring 4 is inserted into the square inner hole of the loading sleeve middle ring 3, the outer diameter of the square inner hole of the loading sleeve middle ring 3 is larger than that of the loading sleeve inner ring 4, and gaps between four contact surfaces of the loading sleeve middle ring 3 and the loading sleeve inner ring 4 are smaller than 0.05mm, so that the loading sleeve middle ring 3 can move more smoothly, and the phenomenon that the axis of the loading sleeve outer ring is not superposed with a wind tunnel balance due to overlarge gaps is avoided; the loading cover inner circle 4 is square column, the loading cover inner circle 4 is opened outward and is equipped with the screw thread, the screw thread is for cutting the screw thread and set up on the four-edged side of 4 length direction of loading cover inner circle, 4 external screw thread connections in the loading cover inner circle have two to keep off ring 31, two keep off ring 31 sides respectively with 3 both sides face butt of circle in the loading cover, set up square column form loading cover inner circle 4 that has the screw thread, circle 3 can not only avoid the loading cover outer lane 2 to rotate on radial direction in the cooperation loading cover, the rotation of fixed loading cover outer lane 2, can also make the loading cover outer lane 2 can follow 4 length direction steady movements in the loading cover inner circle, realized the locking and the fine setting of the arbitrary position of circle 3 in the loading cover outer lane 2 and the loading cover in the loading cover inner circle.
With reference to fig. 2 and 3, the balance attitude measurement component 6 includes a mounting base 61, a pitch angle accelerometer 62, a first roll angle accelerometer 63 and a second roll angle accelerometer 64, the mounting base 61 is fixedly connected to one end of the loading sleeve inner ring 4 away from the support rod 11, the pitch angle accelerometer 62, the first roll angle accelerometer 63 and the second roll angle accelerometer 64 are all flexible quartz accelerometers, the pitch angle accelerometer 62 is fixedly connected to the front end face of the mounting base 61, the first roll angle accelerometer 63 is fixedly connected to the upper end face of the mounting base 61, the second roll angle accelerometer 64 is fixedly connected to the measuring end face of the mounting base 61, wherein the axis of the pitch angle accelerometer 62 is parallel to the axis of the wind tunnel balance 12, and the axes of the first roll angle accelerometer 63 and the second roll angle accelerometer 64 are perpendicular to each other and perpendicular to the axis of the wind tunnel balance 12; a plurality of flexible quartz accelerometers are arranged to measure the magnitude of the moment borne by the wind tunnel balance 12 when loaded; the transverse scale 7 is fixedly connected to the sleeve inner ring 22, the gauge head of the transverse scale 7 is clamped outside the loading sleeve middle ring 3 through a door-shaped connecting block, the accurate measurement of the loading sleeve middle ring 3 in the transverse cavity of the loading sleeve outer ring 2 is realized, and the measurement accuracy reaches 0.02 mm.
With reference to fig. 1 and 2, an axial distance measuring device 9 is erected on a base 1 and located on one side of an outer ring 2 of a loading sleeve, the axial distance measuring device 9 comprises a lead screw 91, a moving block 92 and a grating ruler 93, the lead screw 91 is rotatably connected to the base 1, the axial direction of the lead screw 91 is horizontal and parallel to the axial direction of a supporting rod 11, the moving block 92 is in threaded connection with the lead screw 91, the grating ruler 93 is fixedly connected to the moving block 92, the length direction of the grating ruler 93 is perpendicular to the length direction of the lead screw 91, one end, close to the outer ring 2 of the loading sleeve, of the grating ruler 93 is fixedly connected with a micrometer 94, and a gauge head; during measurement, the lead screw 91 is rotated to drive the ruler head of the grating ruler 93 to move, the gauge head of the micrometer 94 arranged at the measuring end is enabled to lean against the front end face of the outer ring 2 of the loading sleeve, a pointer of the micrometer 94 is enabled to be compressed for a certain distance, then the position of the outer ring 2 of the loading sleeve on the inner ring 4 of the loading sleeve is moved, the processes are repeated, the reading of the grating ruler 93 is recorded, the relative movement distance of the outer ring 2 of the loading sleeve can be obtained by subtracting the reading at last two times, the measurement of the relative movement distance of the outer ring 2 of the loading sleeve is achieved, and the measurement precision of the measurement.
Ideally, the sensitive axis of the pitch angle accelerometer 62 is parallel to the axis of the wind tunnel balance 12, so that the pitch angle sensed by the pitch angle accelerometer 62 is consistent with the pitch angle of the wind tunnel balance 12, and due to inevitable machining errors, after the installation and transmission process with errors for many times, the sensitive axis of the pitch angle accelerometer 62 is not necessarily parallel to the axis of the wind tunnel balance 12, and a pitch installation deviation angle occurs.
With reference to fig. 4 and 5, if calibration is required in a state where the balance pitch angle is 30 °, for example, the balance pitch angle is 29 ° in practice, which results in a relative error of the normal force load of 29 °
Similarly, the relative error of the lateral force load is 1 percent, the relative error of the axial force load is 3 percent, the magnitude of the error is far beyond the tolerance range, and the pitching installation deviation angle delta α shown in the attached figure 4 is the projection angle of the included angle between the sensitive axis of the pitching accelerometer 3 and the axis of the balance on the XY plane, and the pitching installation deviation angle delta α is unchanged when the balance does not roll.
Ideally, the axes of sensitivity of the first roll angle accelerometer 63 and the second roll angle accelerometer 64 are perpendicular to the balance axis, but in practice, they also lead to installation angle deviations due to unavoidable manufacturing tolerances.
The roll mounting deviation angle Δ β, indicated in FIG. 5, is the projection angle of the sensitive axis of the first roll angle accelerometer 63 or the second roll angle accelerometer 64 from the Z axis on the YZ plane, which is the same as the roll mounting deviation angle Δ β when the balance is not pitching.
In summary, in order to accurately obtain initial installation data of the single-vector multi-element loading sleeve, an installation deviation angle of the balance attitude measurement component 6 needs to be obtained, which mainly comprises a pitching installation deviation angle and a rolling installation deviation angle; the electric center position corresponding to the moment component of the wind tunnel balance 12 mainly includes the electric center position of the pitching moment component Mz, the electric center position of the yawing moment component My, the electric center position of the rolling moment Mx, and the like; the center of the moment component means that the force passes through this point, so that the moment component output is zero.
Therefore, the initialization of the installation data of the single-vector multi-element loading sleeve is very important, the calculation accuracy of the calibration input load is directly influenced, and the accuracy of the use coefficient of the balance is indirectly influenced.
Therefore, the data initialization method provided by the invention comprises a pitch installation deviation angle method and two roll installation deviation angle methods for the balance attitude measurement component, and specifically comprises the following steps,
i, determining and calibrating a pitching installation deviation angle of a balance attitude measurement component 6;
1) the wind tunnel balance 12 is adjusted to roll by 0 degree by taking the output angle of the balance attitude measuring component 6 as a reference;
2) the balance attitude control device is locked, the pitch angle of the wind tunnel balance 12 is changed differently through the positioning component 8, the change of the pitch angle adjusts the balance attitude sequentially according to the pitch angle (-10 degrees, -5 degrees, -4 degrees, -3 degrees, -2 degrees, -1 degree, 0 degrees, 1 degrees, 2 degrees, 3 degrees, 4 degrees, 5 degrees, 10 degrees, 20 degrees, 30 degrees and 40 degrees), and meanwhile, the balance axial force component output under different pitch angles is collected;
3) taking the pitching angle as a horizontal coordinate and the balance axial force component output as a vertical coordinate, drawing a curve, performing sextic polynomial fitting on the curve to obtain a fitting formula, and performing derivation on the fitting formula;
4) interpolating the derived formula with a resolution of 0.01 degrees to find an angle Δ α corresponding to the minimum value, where the angle is the pitch installation deviation angle of the balance attitude measurement component 6 when the roll angle is 0 degrees;
5) the balance attitude control device is used for adjusting the rolling attitude of the wind tunnel balance, and the operation is repeated at intervals of 5 degrees within the rolling range of 0-360 degrees, so that the pitching installation deviation angle of the balance attitude measurement component 6 corresponding to the rolling interval of 5 degrees is obtained;
6) fitting a curve of the change of the pitch installation deviation angle of the balance attitude measurement component 6 along with the change of the roll angle according to a sextic polynomial to obtain a formula delta α of the change of the pitch installation deviation angle of the balance attitude measurement component 6 along with the change of the roll angleγ＝f(γ)；
7) In actual calibration, the formula Δ α is usedγF (y) and the roll mounting deviation angle of the balance attitude measurement section 6 with the pitch angle variation formula Δ γαF (α), calculating and obtaining the pitch installation deviation angle of the balance attitude measurement component 6 in the current state for correction;
II, determining and calibrating a roll installation deviation angle of the balance attitude measurement component 6;
1) adjusting the wind tunnel balance 12 to pitch 0 degrees and roll 0 degrees by taking the output angle of the balance attitude measuring component 6 as a standard;
2) the locking and positioning component 8 is used for generating different changes on the roll angle of the wind tunnel balance 12 through the balance attitude control device, and the identification of the roll angle sequentially adjusts the balance attitude according to the roll angle (-95 °, -90 °, -85 °, -80 °, -75 °, -70 °, -65 °, -60 °, -50 °, -40 °, -30 °, -20 °, -10 °, 0 °, 10 °, 20 °, 30 °, 40 °, 50 °, 60 °, 65 °, 70 °, 75 °, 80 °, 85 °, 90 °, 95 °), and simultaneously acquires the balance lateral force component outputs under different roll angles;
3) taking the roll angle as a horizontal coordinate, outputting a balance lateral force component as a vertical coordinate, drawing a curve, performing sextic polynomial fitting on the curve to obtain a fitting formula, and performing derivation on the fitting formula;
4) interpolating the derived formula with a resolution of 0.01 degrees, and finding an angle delta gamma corresponding to the minimum value, wherein the angle is the roll installation deviation angle of the balance attitude measurement component 6 when the pitch is 0 degrees;
5) the pitching attitude of the balance is adjusted through the positioning component 8, and the operations are repeated at intervals of 5 degrees within the range of-10 degrees to 45 degrees in pitching, so that the rolling installation deviation angle of the balance attitude measuring component 6 corresponding to every 5 degrees in pitching is obtained;
6) fitting a curve of the roll installation deviation angle of the balance attitude measurement component 6 changing along with the pitch angle according to a cubic polynomial to obtain a formula delta gamma of the roll installation deviation angle of the balance attitude measurement component 6 changing along with the pitch angleα＝f(α)；
7) In actual calibration, through the formula Δ γαF (α) and the formula Δ α of the change of the pitch installation deviation angle of the balance attitude measurement section 6 with the pitch angleγThe roll installation deviation angle of the balance attitude measurement section 6 at the current state is obtained by calculation as f (γ) and corrected.
The second type of determination and calibration of the roll mounting deviation angle of the attitude measurement component 6 of the balance, as follows,
1) adjusting the wind tunnel balance 12 to pitch 0 degrees and roll 0 degrees by taking the output angle of the balance attitude measuring component 6 as a standard;
2) locking the pitching motion of the balance on a balance posture control device, adjusting the balance posture according to the roll angle (-10 degrees, 0 degrees and 10 degrees) in sequence, and collecting the output of the lateral force component of the balance;
3) carrying out linear fitting on the obtained data to obtain a formula y1＝k1x；
4) Adjusting the posture of the wind tunnel balance 12 according to the roll angles (170 degrees, 180 degrees and 190 degrees) in sequence, and collecting the lateral force component output of the balance;
5) linear fitting is carried out on the data obtained this time to obtain a formula y2＝k2x；
6) Calculating two formulas y1＝k1x and y2＝k2x abscissa of intersection x0Then x0The roll installation deviation angle of the balance attitude measurement section 6 at the pitch of 0 °;
7) adjusting the pitching attitude of the wind tunnel balance 12, and repeating the operation at every 5 degrees within the pitching-10-45-degree range to obtain the rolling installation deviation angle of the balance attitude measuring component 6 corresponding to every 5 degrees in pitching;
8) fitting a curve of the roll installation deviation angle of the balance attitude measurement component 6 changing along with the pitch angle according to a sextic polynomial to obtain a formula of the roll installation deviation angle of the balance attitude measurement component 6 changing along with the pitch angle;
9) in actual calibration, through the formula Δ γαF (α) and the formula Δ α of the change of the pitch installation deviation angle of the balance attitude measurement section 6 with the pitch angleγThe roll installation deviation angle of the balance attitude measurement section 6 at the current state is obtained by calculation as f (γ) and corrected.
The invention also provides a method for determining the position of the balance pitching moment component electric center on the axial distance measuring device 9, which comprises the following steps,
1) adjusting the wind tunnel balance 12 to pitch 0 degrees and roll 0 degrees, and locking the relative transverse movement between the loading sleeve middle ring 3, the loading sleeve outer ring 2 and the loading sleeve inner ring 4;
2) moving the outer ring 2 of the loading sleeve to a certain point on the inner ring 4 of the loading sleeve, locking the outer ring 2 of the loading sleeve through the baffle ring 31, adjusting the pitching angle of the balance to 0 degree, and measuring the position data of the outer ring 2 of the loading sleeve to be a through the axial distance measuring device 91And collecting balance pitching moment output data b1；
3) Adjusting the attitude of the wind tunnel balance 12 to roll 180 degrees, and collecting the balance pitching moment output data b2；
4) Adjusting the attitude of the wind tunnel balance 2 to 0 degrees, moving the outer ring 2 of the loading sleeve to another point on the inner ring 4 of the loading sleeve, locking the outer ring 2 of the loading sleeve through the baffle ring 31, adjusting the pitch angle of the wind tunnel balance 12 to 0 degrees, and measuring the position data of the outer ring 2 of the loading sleeve to be a through the axial distance measuring device 92And collecting balance pitching moment output data b3；
5) Adjusting wind tunnel skyThe attitude of the flat 12 is changed to roll 180 degrees, and balance pitching moment output data b is collected4；
6) Respective Linear fitting of data (a)1，a2；b1，b3) And (a)1，a2；b2，b4) And obtaining two linear equations, and solving the abscissa value of the intersection point of the two straight lines to obtain the position reading of the pitching moment electric center on the axial distance measuring device 9.
The invention also provides a method for determining the position of the yaw moment component electric center of the balance on the axial distance measuring device 9, which comprises the following steps,
1) adjusting the wind tunnel balance 12 to pitch 0 degrees and roll 90 degrees, and locking the relative transverse movement between the loading sleeve middle ring 3, the loading sleeve outer ring 2 and the loading sleeve inner ring 4;
2) moving the outer ring 2 of the loading sleeve to a certain point on the inner ring 4 of the loading sleeve, locking the outer ring 2 of the loading sleeve through the baffle ring 31, adjusting the pitching angle of the balance to 0 degree, and measuring the position data of the outer ring 2 of the loading sleeve to be a through the axial distance measuring device 91And collecting balance yaw moment output data b1；
3) Adjusting the attitude of the wind tunnel balance 12 to roll 270 degrees, and collecting the balance pitching moment output data b2；
4) Adjusting the balance posture to 0 degrees, moving the outer ring 2 of the loading sleeve to another point on the inner ring 4 of the loading sleeve, locking the outer ring 2 of the loading sleeve through the baffle ring 31, adjusting the pitching angle of the balance to 0 degrees, and measuring the position data of the outer ring 2 of the loading sleeve to be a through the axial distance measuring device 92And collecting balance yaw moment output data b3；
5) Adjusting the attitude of the wind tunnel balance 12 to roll 270 degrees, and collecting balance yaw moment output data b4；
6) Respective Linear fitting of data (a)1，a2；b1，b3) And (a)1，a2；b2，b4) And obtaining two linear equations, and solving the abscissa value of the intersection point of the two straight lines to obtain the position reading of the yaw moment electric center on the axial distance measuring device 9.
The invention also provides a method for determining the position of the center of the roll moment component of the balance on the transverse scale 7, which comprises the following steps,
1) adjusting the wind tunnel balance 12 to pitch 0 degrees and roll 0 degrees, and locking the relative axial movement between the loading sleeve middle ring 3, the loading sleeve outer ring 2 and the loading sleeve inner ring 4;
2) transversely moving the outer ring 2 of the loading sleeve to a certain point, adjusting the rolling angle of the balance to 0 degree, and reading the reading a of the gauge outfit of the transverse scale 71And collecting balance rolling torque output data b1；
3) Adjusting the attitude of the wind tunnel balance 12 to roll 180 degrees, and collecting the balance pitching moment output data b2；
4) Adjusting the attitude of the wind tunnel balance 12 to 0 degrees, transversely moving the outer ring 2 of the loading sleeve to another point, adjusting the pitching angle of the balance to 0 degrees, and reading the gauge head reading a of the transverse scale 72And collecting balance rolling torque output data b3；
5) Adjusting the attitude of the wind tunnel balance 12 to roll 180 degrees, and collecting balance roll torque output data b4；
6) Respective Linear fitting of data (a)1，a2；b1，b3) And (a)1，a2；b2，b4) And obtaining two linear equations, and solving the horizontal coordinate value of the intersection point of the two straight lines to obtain the position reading of the roll torque electric core on the transverse scale 7.
The method supplements the method for acquiring the installation data of the single-vector multi-element loading sleeve, provides a data base for system error correction and high-precision measurement of the balance attitude, and improves the precision of input load decomposition calculation in single-vector multi-element calibration.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A wind tunnel balance single vector multi-element calibration loading sleeve installation data initialization method is characterized by comprising the following steps: comprises the steps of determining and calibrating the pitch installation deviation angle and the roll installation deviation angle of the balance attitude measurement component (6), particularly as follows,
i, determining and calibrating a pitching installation deviation angle of a balance attitude measurement component (6);
1) the wind tunnel balance (12) is adjusted to roll by 0 degree by taking the output angle of the balance attitude measuring component (6) as a reference;
2) locking a balance attitude control device, enabling the pitching angle of the wind tunnel balance (12) to generate different changes through a positioning component (8), and simultaneously collecting balance axial force component outputs at different pitching angles;
3) taking the pitching angle as a horizontal coordinate and the balance axial force component output as a vertical coordinate, drawing a curve, performing sextic polynomial fitting on the curve to obtain a fitting formula, and performing derivation on the fitting formula;
4) interpolating the derived formula with a resolution of 0.01 degrees to find an angle delta α corresponding to the minimum value, wherein the angle is the pitching installation deviation angle of the balance attitude measurement component (6) when the roll angle is 0 degrees;
5) the rolling attitude of the wind tunnel balance (12) is adjusted through the balance attitude control device, and the operation is repeated at intervals of 5 degrees within the rolling range of 0-360 degrees, so that the pitching installation deviation angle of the balance attitude measurement component (6) corresponding to the rolling interval of 5 degrees is obtained;
6) fitting a curve of the change of the pitch installation deviation angle of the balance attitude measurement component (6) along with the change of the roll angle according to a sextic polynomial to obtain a formula delta α of the change of the pitch installation deviation angle of the balance attitude measurement component (6) along with the change of the roll angleγ＝f(γ)；
7) In actual calibration, the formula Δ α is usedγF (gamma) and the formula delta gamma of the change of the roll installation deviation angle of the balance attitude measurement component (6) along with the pitch angleαF (α), calculating and obtaining the pitch installation deviation angle of the balance attitude measurement component (6) in the current state for correction;
II, determining and calibrating the roll installation deviation angle of the balance attitude measurement component (6);
1) adjusting the wind tunnel balance (12) to pitch 0 degrees and roll 0 degrees by taking the output angle of the balance attitude measuring component (6) as a standard;
2) the locking and positioning component (8) enables the roll angle of the wind tunnel balance (12) to generate different changes through the balance attitude control device, and simultaneously collects balance lateral force components under different roll angles to be output;
3) taking the roll angle as a horizontal coordinate, outputting a balance lateral force component as a vertical coordinate, drawing a curve, performing sextic polynomial fitting on the curve to obtain a fitting formula, and performing derivation on the fitting formula;
4) interpolating the derived formula with a resolution of 0.01 degrees, and finding an angle delta gamma corresponding to the minimum value, wherein the angle is the roll installation deviation angle of the balance attitude measurement component (6) when the pitch is 0 degrees;
5) the pitching attitude of the balance is adjusted through the positioning component (8), and the operation is repeated at every 5 degrees within the pitching-10-45-degree range, so that the rolling installation deviation angle of the balance attitude measuring component corresponding to every 5 degrees in pitching is obtained;
6) fitting a curve of the roll installation deviation angle of the balance attitude measurement component (6) changing along with the pitch angle according to a sextic polynomial to obtain a formula delta gamma of the roll installation deviation angle of the balance attitude measurement component (6) changing along with the pitch angleα＝f(α)；
7) In actual calibration, through the formula Δ γαF (α) and the formula of the change of the pitch installation deviation angle of the balance attitude measurement component with the pitch angle delta αγAnd f (gamma) calculating to obtain the roll installation deviation angle of the balance attitude measurement component in the current state for correction.
2. The wind tunnel balance single-vector multi-element calibration loading sleeve installation data initialization method according to claim 1, characterized in that: the balance posture is adjusted according to the pitch angles (-10 degrees, -5 degrees, -4 degrees, -3 degrees, -2 degrees, -1 degree, 0 degrees, 1 degrees, 2 degrees, 3 degrees, 4 degrees, 5 degrees, 10 degrees, 20 degrees, 30 degrees and 40 degrees sequentially through the change of the pitch angles.
3. The wind tunnel balance single-vector multi-element calibration loading sleeve installation data initialization method according to claim 1, characterized in that: the roll angle is distinguished and protected, and the balance posture is adjusted according to roll angles (-95 degrees, -90 degrees, -85 degrees, -80 degrees, -75 degrees, -70 degrees, -65 degrees, -60 degrees, -50 degrees, -40 degrees, -30 degrees, -20 degrees, -10 degrees, -0 degrees, -10 degrees, -20 degrees, -30 degrees, -40 degrees, -50 degrees, -60 degrees, -65 degrees, -70 degrees, -75 degrees, -80 degrees, -85 degrees, -90 degrees and 95 degrees in sequence.
4. The wind tunnel balance single-vector multi-element calibration loading sleeve installation data initialization method according to claim 1, characterized in that: the roll mounting deviation angle of the attitude measurement component (6) of the balance can also be determined and calibrated by, in particular,
1) adjusting the wind tunnel balance (12) to pitch 0 degrees and roll 0 degrees by taking the output angle of the balance attitude measuring component (6) as a standard;
2) locking the pitching motion of the balance on a balance posture control device, adjusting the balance posture according to the roll angle (-10 degrees, 0 degrees and 10 degrees) in sequence, and collecting the output of the lateral force component of the balance;
3) carrying out linear fitting on the obtained data to obtain a formula y1＝k1x；
4) The attitude of the wind tunnel balance (12) is adjusted according to the roll angles (170 degrees, 180 degrees and 190 degrees) in sequence, and the lateral force component output of the balance is collected;
5) linear fitting is carried out on the data obtained this time to obtain a formula y2＝k2x；
6) Calculating two formulas y1＝k1x and y2＝k2x abscissa of intersection x0Then x0The roll installation deviation angle of the balance attitude measurement component (6) when the pitch is 0 degrees;
7) adjusting the pitching attitude of the wind tunnel balance (12), and repeating the operation at every 5 degrees within the pitching-10-45-degree range to obtain the rolling installation deviation angle of the balance attitude measuring component (6) corresponding to every 5 degrees in pitching;
8) fitting a curve of the roll installation deviation angle of the balance attitude measurement component (6) changing along with the pitch angle according to a sextic polynomial to obtain a formula of the roll installation deviation angle of the balance attitude measurement component (6) changing along with the pitch angle;
9) in actual calibration, through the formula Δ γαF (α) and the formula of the change of the pitch installation deviation angle of the balance attitude measurement component with the pitch angle delta αγAnd f (gamma) calculating to obtain the roll installation deviation angle of the balance attitude measurement component in the current state for correction.
5. The wind tunnel balance single-vector multi-element calibration loading sleeve installation data initialization method according to claim 1, characterized in that: one end of the wind tunnel balance (12) is fixedly connected with a supporting rod (11), the axis of the supporting rod (11) is overlapped with the axis of the wind tunnel balance (12), and one end of the supporting rod (11) is connected with the balance posture control device so as to enable the wind tunnel balance (12) to rotate along the axis.
6. The wind tunnel balance single-vector multi-element calibration loading sleeve installation data initialization method according to claim 1, characterized in that: the balance attitude measurement component (6) comprises a mounting seat (61), a pitch angle accelerometer (62), a first roll angle accelerometer (63) and a second roll angle accelerometer (64), the mounting seat (61) is fixedly connected to the inner ring (4) of the loading sleeve, the pitch angle accelerometer (62) is fixedly connected to the front end face of the mounting seat (61), the first roll angle accelerometer (63) is fixedly connected to the upper end face of the mounting seat (61), the second roll angle accelerometer (64) is fixedly connected to the end face of the mounting seat (61), the axis of the pitch angle accelerometer (62) is parallel to the axis of the wind tunnel balance, and the axes of the first roll angle accelerometer (63) and the second roll angle accelerometer (64) are perpendicular to each other and are perpendicular to the axis of the wind tunnel balance (12).
7. The wind tunnel balance single-vector multi-element calibration loading sleeve installation data initialization method according to claim 6, characterized in that: also comprises a method for determining the position of the balance pitching moment component center on the axial distance measuring device (9), which comprises the following steps,
1) adjusting the wind tunnel balance (12) to pitch 0 degrees, roll 0 degrees, and lock the relative transverse movement between the loading sleeve middle ring (3), the loading sleeve outer ring (2) and the loading sleeve inner ring (4);
2) moving the outer ring (2) of the loading sleeve to a certain point on the inner ring (4) of the loading sleeve, locking the outer ring (2) of the loading sleeve through the baffle ring (31), adjusting the pitching angle of the balance to 0 degree, and measuring the position data of the outer ring (2) of the loading sleeve to be a through the axial distance measuring device (9)1And collecting balance pitching moment output data b1；
3) Adjusting the attitude of the wind tunnel balance (12) to roll 180 degrees, and collecting the balance pitching moment output data b2；
4) Adjusting the posture of the wind tunnel balance (12) to 0 degrees, moving the outer ring (2) of the loading sleeve to another point on the inner ring (4) of the loading sleeve, locking the outer ring (2) of the loading sleeve through the baffle ring (31), adjusting the pitching angle of the wind tunnel balance (12) to 0 degrees, and measuring the position data of the outer ring (2) of the loading sleeve to a through the axial distance measuring device (9)2And collecting balance pitching moment output data b3；
5) Adjusting the attitude of the wind tunnel balance (12) to roll 180 degrees, and collecting the balance pitching moment output data b4；
6) Respective Linear fitting of data (a)1，a2；b1，b3) And (a)1，a2；b2，b4) And obtaining two linear equations, and solving the abscissa value of the intersection point of the two straight lines to obtain the position reading of the pitching moment electric center on the axial distance measuring device (9).
8. The wind tunnel balance single-vector multi-element calibration loading sleeve installation data initialization method according to claim 7, characterized in that: also comprises a method for determining the position of the yaw moment component center of the balance on the axial distance measuring device (9), which comprises the following steps,
1) adjusting the wind tunnel balance (12) to pitch 0 degrees, roll 90 degrees, and lock the relative transverse movement between the loading sleeve middle ring (3), the loading sleeve outer ring (2) and the loading sleeve inner ring (4);
2) the outer ring (2) of the loading sleeve is moved to a certain point on the inner ring (4) of the loading sleeve, the outer ring (2) of the loading sleeve is locked through the baffle ring (31), and the pitching of the balance is adjustedThe angle reaches 0 degree, the position data of the outer ring of the loading sleeve is measured to be a by an axial distance measuring device1And collecting balance yaw moment output data b1；
3) Adjusting the attitude of the wind tunnel balance (12) to roll 270 degrees, and collecting the balance pitching moment output data b2；
4) Adjusting the balance posture to 0 degrees, moving the outer ring (2) of the loading sleeve to another point on the inner ring (4) of the loading sleeve, locking the outer ring (2) of the loading sleeve through the baffle ring (31), adjusting the pitching angle of the balance to 0 degrees, and measuring the position data of the outer ring (2) of the loading sleeve to be a through the axial distance measuring device (9)2And collecting balance yaw moment output data b3；
5) Adjusting the attitude of the wind tunnel balance (12) to roll 270 degrees, and collecting the yaw moment output data b of the balance4；
6) Respective Linear fitting of data (a)1，a2；b1，b3) And (a)1，a2；b2，b4) And obtaining two linear equations, and solving the abscissa value of the intersection point of the two straight lines to obtain the position reading of the yaw moment electric center on the axial distance measuring device (9).
9. The wind tunnel balance single-vector multi-element calibration loading sleeve installation data initialization method according to claim 8, characterized in that: also comprises a method for determining the position of the center of the roll moment component of the balance on the transverse scale (7), which comprises the following steps,
1) adjusting the wind tunnel balance (12) to pitch 0 degrees, roll 0 degrees, and lock the relative axial movement between the loading sleeve middle ring (3) and the loading sleeve outer ring (2) and the loading sleeve inner ring (4);
2) transversely moving the outer ring (2) of the loading sleeve to a certain point, adjusting the rolling angle of the balance to 0 degree, and reading the meter head reading a of the transverse scale (7)1And collecting balance rolling torque output data b1；
3) Adjusting the attitude of the wind tunnel balance (12) to roll 180 degrees, and collecting the balance pitching moment output data b2；
4) Adjusting the attitude of the wind tunnel balance (12) to 0 degree, and transversely moving the outer ring (2) of the loading sleeve to the otherPoint, adjust the pitching angle of the balance to 0 degree, read the reading a of the gauge head of the horizontal scale (7)2And collecting balance rolling torque output data b3；
5) Adjusting the attitude of the wind tunnel balance (12) to roll 180 degrees, and collecting the roll torque output data b of the balance4；
6) Respective Linear fitting of data (a)1，a2；b1，b3) And (a)1，a2；b2，b4) And obtaining two linear equations, and solving the horizontal coordinate value of the intersection point of the two straight lines to obtain the position reading of the roll torque electric center on the transverse scale (7).
10. The wind tunnel balance single-vector multi-element calibration loading sleeve installation data initialization method according to claim 8, characterized in that: axial range unit (9) are including lead screw (91), motion piece (92) and grating chi (93), lead screw (91) rotate to be connected on base (1), motion piece (92) threaded connection is on lead screw (91), grating chi (93) link firmly on motion piece (92), grating chi (93) length direction is perpendicular with lead screw (91) length direction, grating chi (93) are close to one of loading cover and serve and have linked firmly micrometer (94), the gauge outfit and the loading cover butt of micrometer (94).
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268680A (en) * | 2020-09-17 | 2021-01-26 | 中国航天空气动力技术研究院 | Method for improving test accuracy of rotary balance |
| CN113049213A (en) * | 2021-03-11 | 2021-06-29 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel balance loading method |
| CN113639956A (en) * | 2021-10-18 | 2021-11-12 | 中国空气动力研究与发展中心高速空气动力研究所 | Calibration device and calibration method for model inclination angle measurement device |
| CN114577433A (en) * | 2022-02-15 | 2022-06-03 | 中国航空工业集团公司哈尔滨空气动力研究所 | Wind tunnel virtual flight test balance aerodynamic force acquisition and processing system |
| CN114813030A (en) * | 2022-05-05 | 2022-07-29 | 南京理工大学 | Wind tunnel high revolution speed attitude adjusting and correcting capability test bench |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020088268A1 (en) * | 2001-01-08 | 2002-07-11 | Parker Peter A. | Single vector calibration system for multi-axis load cells and method for calibrating a multi-axis load cell |
| CN101419118A (en) * | 2008-12-05 | 2009-04-29 | 中国航天空气动力技术研究院 | Support reaction type wind tunnel balance body axis system static calibration method |
| WO2010150506A1 (en) * | 2009-06-22 | 2010-12-29 | 川崎重工業株式会社 | Wind tunnel balance calibrator |
| US9052250B1 (en) * | 2012-05-04 | 2015-06-09 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Method of calibrating a force balance |
| CN105571813A (en) * | 2015-12-29 | 2016-05-11 | 中国航天空气动力技术研究院 | Wind tunnel balance single-vector calibration loading mechanism |
| CN106644365A (en) * | 2016-12-29 | 2017-05-10 | 中国航天空气动力技术研究院 | Low-speed wind tunnel thrust vector balance calibrating device |
| CN109029908A (en) * | 2018-09-03 | 2018-12-18 | 吉林大学 | A kind of the coefficient scaling method and calculation method of full-scale automobile wind tunnel six square phase strain balance formula |
| CN110108441A (en) * | 2019-05-10 | 2019-08-09 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of wind-tunnel balance dynamometer check preparation device |
| CN110108442A (en) * | 2019-05-10 | 2019-08-09 | 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 balance terminal attitude measuring and its method in balance calibration |
| CN110108440A (en) * | 2019-05-10 | 2019-08-09 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of wind-tunnel balance attitude-control device |
-
2020
- 2020-01-17 CN CN202010055312.8A patent/CN111207902B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020088268A1 (en) * | 2001-01-08 | 2002-07-11 | Parker Peter A. | Single vector calibration system for multi-axis load cells and method for calibrating a multi-axis load cell |
| CN101419118A (en) * | 2008-12-05 | 2009-04-29 | 中国航天空气动力技术研究院 | Support reaction type wind tunnel balance body axis system static calibration method |
| WO2010150506A1 (en) * | 2009-06-22 | 2010-12-29 | 川崎重工業株式会社 | Wind tunnel balance calibrator |
| US9052250B1 (en) * | 2012-05-04 | 2015-06-09 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Method of calibrating a force balance |
| CN105571813A (en) * | 2015-12-29 | 2016-05-11 | 中国航天空气动力技术研究院 | Wind tunnel balance single-vector calibration loading mechanism |
| CN106644365A (en) * | 2016-12-29 | 2017-05-10 | 中国航天空气动力技术研究院 | Low-speed wind tunnel thrust vector balance calibrating device |
| CN109029908A (en) * | 2018-09-03 | 2018-12-18 | 吉林大学 | A kind of the coefficient scaling method and calculation method of full-scale automobile wind tunnel six square phase strain balance formula |
| CN110108441A (en) * | 2019-05-10 | 2019-08-09 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of wind-tunnel balance dynamometer check preparation device |
| CN110108442A (en) * | 2019-05-10 | 2019-08-09 | 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 balance terminal attitude measuring and its method in balance calibration |
| CN110108440A (en) * | 2019-05-10 | 2019-08-09 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of wind-tunnel balance attitude-control device |
Non-Patent Citations (3)
| Title |
|---|
| MA YINGKUN: "Hybrid calibration method for six-component force/torque transducers of wind tunnel balance based on support vector", 《CHINESE JOURNAL OF AERONAUTICS》 * |
| 刘志勇等: "基于 Ｋｒｉｇｉｎｇ模型的风洞应变天平静态校准方法", 《航空学报》 * |
| 湛华海等: "一种单矢量风洞天平校准系统设计", 《实验流体力学》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268680A (en) * | 2020-09-17 | 2021-01-26 | 中国航天空气动力技术研究院 | Method for improving test accuracy of rotary balance |
| CN113049213A (en) * | 2021-03-11 | 2021-06-29 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel balance loading method |
| CN113049213B (en) * | 2021-03-11 | 2022-03-01 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel balance loading method |
| CN113639956A (en) * | 2021-10-18 | 2021-11-12 | 中国空气动力研究与发展中心高速空气动力研究所 | Calibration device and calibration method for model inclination angle measurement device |
| CN113639956B (en) * | 2021-10-18 | 2022-01-18 | 中国空气动力研究与发展中心高速空气动力研究所 | Calibration device and calibration method for model inclination angle measurement device |
| CN114577433A (en) * | 2022-02-15 | 2022-06-03 | 中国航空工业集团公司哈尔滨空气动力研究所 | Wind tunnel virtual flight test balance aerodynamic force acquisition and processing system |
| CN114577433B (en) * | 2022-02-15 | 2023-06-20 | 中国航空工业集团公司哈尔滨空气动力研究所 | Wind tunnel virtual flight test balance aerodynamic force acquisition and processing system |
| CN114813030A (en) * | 2022-05-05 | 2022-07-29 | 南京理工大学 | Wind tunnel high revolution speed attitude adjusting and correcting capability test bench |
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