Radio frequency semi-physical simulation turntable switching positioning device and operation method

Abstract

According to the radio frequency semi-physical simulation rotary table switching and positioning device and the operation method, a pair of longitudinal guide rails is arranged between the left end and the right end of a lathe bed, two pairs of transverse guide rails are symmetrically arranged between the front end and the rear end of the lathe bed, racks are arranged between the longitudinal guide rails and the transverse guide rails, and two three-axis rotary tables and a two-axis rotary table are arranged on the lathe bed; the three-axis rotary table and the two-axis rotary table are connected with the lathe bed into a whole through a movable seat, a transition seat is arranged between the pair of longitudinal guide rails, a pair of transition guide rails is arranged on the upper surface of the transition seat, and a transition rack is arranged between the pair of transition guide rails. According to the invention, each part is constructed by adopting mature devices in the existing market, and a set of turntable switching positioning equipment is designed by utilizing transverse and longitudinal moving guide rails, so that random switching among a plurality of sets of simulation turntables is realized, the application requirements of different test equipment are met, and the flexibility of a simulation system is greatly expanded; and meanwhile, the position of the simulation turntable can be quickly and accurately positioned, the use efficiency of equipment is improved, and the turntable switching and positioning time is greatly shortened.

Description

Technical Field

[0001] The invention relates to the field of radar radiation type semi-physical simulation test, and in particular to a radio frequency semi-physical simulation turntable switching positioning device and an operation method. Background Art

[0002] RF semi-physical simulation has been widely used in the field of electronic information equipment simulation due to its advantages of good repeatability, large sample size, and low organizational cost. RF semi-physical simulation systems are generally composed of simulation master control, signal simulator, antenna array, turntable, etc. Among them, the turntable is mainly used to carry missile-borne or airborne equipment, receive platform attitude data solved by the RF semi-physical simulation system, simulate the motion attitude of the equipment in actual flight, and cooperate with the antenna array calibration equipment to complete the antenna array calibration work to ensure the angular simulation accuracy of the equipment semi-physical simulation system.

[0003] Most existing RF semi-physical simulation systems are designed with a simulation turntable, which is fixed in the turntable foundation and is used to carry out testing tasks for typical equipment models. However, in order to meet the assessment requirements for general equipment, the semi-physical simulation system has both large-caliber, low-mobility equipment and small-caliber, high-mobility equipment in its test objects. It is technically difficult to achieve both high-dynamic small loads and low-dynamic large loads with the same simulation turntable. For the test object, the three-axis simulation turntables with different performances are switched by mechanical lifting. After the simulation turntable is switched, the installation position of the turntable needs to be calibrated with the help of special equipment such as a total station. The calibration cycle is generally more than one week. If the installation position of the simulation turntable does not meet the simulation test conditions after calibration, the turntable needs to be re-lifted and the installation position of the turntable needs to be adjusted. Since the weight of the semi-physical simulation turntable is measured in tons, the switching process requires the use of large-scale lifting equipment, special transfer equipment, etc. The switching process is time-consuming and labor-intensive, and consumes a lot of human resources. In addition, the lifting method cannot effectively guarantee the installation accuracy of the turntable. After calibration, the installation position of the turntable needs to be adjusted many times, resulting in a long installation and positioning time period for the simulation turntable.

[0004] In view of the above reasons, a radio frequency semi-physical simulation turntable switching positioning device and an operating method are developed. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a radio frequency semi-physical simulation turntable switching and positioning device and an operating method. By utilizing horizontal and vertical guide rails, a turntable switching and positioning device is designed to achieve arbitrary switching between multiple sets of simulation turntables, meet the application requirements of different test equipment, and greatly expand the flexibility of the simulation system; at the same time, the position of the simulation turntable can be quickly and accurately located to improve the efficiency of equipment use; the present invention can complete the switching and positioning of the simulation turntable within 4 hours, greatly shortening the turntable switching and positioning time; the various components of the present invention are all constructed using mature devices on the existing market, and the development cycle is short.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a radio frequency semi-physical simulation turntable switching positioning device, comprising a cross-shaped bed, a pair of longitudinal guide rails are arranged between the left and right ends of the cross-shaped bed, two pairs of transverse guide rails are symmetrically arranged between the front and rear ends of the bed, and a track switching area is formed between the opposite ends of the two pairs of transverse guide rails, the two pairs of transverse guide rails are located on both sides of the pair of longitudinal guide rails, racks are arranged between the pair of longitudinal guide rails and the two pairs of transverse guide rails, and the racks are parallel to the corresponding guide rails, two three-axis turntables and one two-axis turntable are arranged on the bed, and the two-axis turntable is located at At the left end of the bed, the three-axis turntable and the two-axis turntable are connected to the bed through a moving seat, the three moving seats are respectively set as moving seat a, moving seat b, and moving seat c, the two-axis turntable is set on the moving seat c, the moving seats a and b are located on the transverse guide rails, the moving seats a, moving seat b, and moving seat c drive the corresponding three-axis turntable and two-axis turntable to move, a transition seat is set between a pair of longitudinal guide rails, the transition seat moves left and right along the longitudinal guide rails, a pair of transition guide rails are set on the upper surface of the transition seat, a transition rack is set between the pair of transition guide rails, and the three-axis turntable moves on the longitudinal guide rails through the transition seat.

[0007] Furthermore, the transverse guide rail and transition guide rail adopt V-shaped roller guide rails, and the spacing of the transition guide rails is the same as that of the transverse guide rails; the longitudinal guide rail adopts a linear rolling guide rail; the movable seat c includes a mounting plate, a slider arranged below the mounting plate and corresponding to the longitudinal guide rail, a drive motor a arranged at the rear end of the mounting plate, and a gear arranged on the rotating shaft of the drive motor a and meshing with the rack; the transition seat has the same structure as the movable seat c; the movable seats a and b include a mounting plate, two pairs of pulleys symmetrically arranged on the mounting plate and corresponding to the transverse guide rail, a drive motor b arranged at the rear end of the mounting plate, and a gear arranged on the rotating shaft of the drive motor b and meshing with the rack; positioning blocks are provided on the movable seat and the transition seat.

[0008] An operating method of a radio frequency semi-physical simulation turntable switching and positioning device, wherein two three-axis turntables are respectively set as a three-axis turntable a and a three-axis turntable b, wherein the initial position of the three-axis turntable a is located on a transition seat at the right end of a bed, and the three-axis turntable b is located at the front end of the bed, and when the two three-axis turntables are switched, the control console starts the transition seat, and the transition seat drives the three-axis turntable a to move to a track switching area, and the control console starts the moving seat a below the three-axis turntable a, and the moving seat a drives the three-axis turntable a to move to a designated position along a transverse guide rail and fix it; the moving seat b drives the three-axis turntable b to move to the transition seat along the transverse guide rail and then stops moving, and the transition seat drives the three-axis turntable b to move to a designated position along a longitudinal guide rail toward the right end of the bed and fix it, thereby completing the switching of the two three-axis turntables;

[0009] When the turntable needs to be calibrated, the optical calibration device is used to confirm the position error of the turntable after switching.

[0010] Set the center of a certain antenna aperture as the target point, its azimuth angle relative to the center of the spherical array is θ, and its elevation angle is A rectangular coordinate system is established with the center of the spherical array as the origin, the horizontal direction as the x-axis, the vertical direction as the y-axis, and the axial direction of the darkroom as the z-axis;

[0011] When the pitch angle is The azimuth angle is θ, and the coordinates of the target in the rectangular coordinate system are:

[0012]

[0013] When the origin is O(0,0,0), assume that the coordinate difference between the turntable and the center of the spherical screen in the z direction is ΔL, and assume that the center of the plane where the outer frame axis is located is the origin O'(0,0,ΔL);

[0014] The distance between the rotation center of the turntable and the center of the array is directly measured by the optical calibration device, and the error in the z-axis direction can be obtained by comparing it with the initial distance. In the actual measurement process, multiple antennas near the axis can be measured to reduce the measurement error;

[0015] The measurement principles of X and Y axes are the same. Take X axis measurement as an example. When the origin is O(0,0,0), it is assumed that the coordinates of the turntable and the center of the spherical screen in the x direction differ by ΔL. It is assumed that the center of the plane where the outer frame axis is located is the origin O'(ΔL,0,0);

[0016] The target position now becomes:

[0017]

[0018] The radius after the change is:

[0019]

[0020] Taking into account the calibration workload and test results, the optical calibration device can be used to scan the spherical radius on the horizontal and vertical cross lines of the antenna array with the center antenna of the array as the intersection point. The errors in the horizontal and vertical directions of the turntable can be obtained by analyzing and calculating the scanning results.

[0021] Correction of positioning deviation when switching turntable

[0022] If a large deviation is found after testing, the solution is to replace the mechanical positioning block.

[0023] The beneficial effects of the present invention are as follows: the present invention designs a turntable switching and positioning device by utilizing transverse and longitudinal guide rails, thereby realizing arbitrary switching between multiple sets of simulation turntables, meeting the application requirements of different test equipment, and greatly expanding the flexibility of the simulation system; at the same time, it can quickly and accurately locate the position of the simulation turntable, and improve the efficiency of equipment use; the present invention can complete the switching and positioning of the simulation turntable within 4 hours, greatly shortening the turntable switching and positioning time; the various components of the present invention are constructed using mature devices on the existing market, and the development cycle is short; the parts not described in detail in the present invention are existing common technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the general assembly;

[0026] Figure 2 yes Figure 1 The enlarged structural diagram at a in the middle;

[0027] Figure 3 Initial position of the turntable;

[0028] Figure 4 The three-axis turntable a moves to the specified position along the longitudinal guide rail;

[0029] Figure 5 The three-axis turntable a moves to the specified position along the transverse guide rail;

[0030] Figure 6 The three-axis turntable b moves to the specified position along the transverse guide rail;

[0031] Figure 7 The three-axis turntable b moves to the working position;

[0032] Figure 8 It is a schematic diagram of spatial geometric relationships;

[0033] Fig. 9 It is a schematic diagram of longitudinal error correction;

[0034] Fig.10 is a schematic diagram of lateral error correction;

[0035] Fig.11 This is a schematic diagram of array antenna selection;

[0036] In the figure: bed 1, three-axis turntable 2, longitudinal guide rail 3, transverse guide rail 3.1, moving seat 4, transition seat 5, two-axis turntable 6, drive motor a7, drive motor b8, rack 9. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with embodiments and specific implementation modes:

[0038] Example 1

[0039] like Figure 1-Figure 2 As shown, a radio frequency semi-physical simulation turntable switching positioning device comprises a cross-shaped bed 1, a pair of longitudinal guide rails 3 are arranged between the left and right ends of the cross-shaped bed, two pairs of transverse guide rails 3.1 are symmetrically arranged between the front and rear ends of the bed 1, and a track switching area is formed between the opposite ends of the two pairs of transverse guide rails 3.1, the two pairs of transverse guide rails 3.1 are located on both sides of the pair of longitudinal guide rails 3, racks 9 are arranged between the pair of longitudinal guide rails 3 and the two pairs of transverse guide rails 3.1, and the racks 9 are parallel to the corresponding guide rails, two three-axis turntables 2 and one two-axis turntable 6 are arranged on the bed 1, and the two-axis turntable 6 is located at the left end of the bed 1, The three-axis turntable 2 and the two-axis turntable 6 are connected to the bed 1 through a moving seat 4. The three moving seats 4 are respectively set as moving seat a, moving seat b, and moving seat c. The two-axis turntable 6 is set on the moving seat c. The moving seats a and b are located on the transverse guide rail 3.1. The moving seats a, moving seats b, and moving seats c drive the corresponding three-axis turntable 2 and two-axis turntable 6 to move. A transition seat 5 is set between a pair of longitudinal guide rails 3. The transition seat 5 moves left and right along the longitudinal guide rail 3. A pair of transition guide rails are set on the upper surface of the transition seat 5. A transition rack is set between the pair of transition guide rails. The three-axis turntable 2 moves on the longitudinal guide rail 3 through the transition seat 5.

[0040] The transverse guide rail 3.1 and the transition guide rail adopt V-shaped roller guide rails, and the spacing of the transition guide rails is the same as the spacing of the transverse guide rail 3.1; the longitudinal guide rail 3 adopts a linear rolling guide rail; the movable seat c includes a mounting plate, a slider arranged below the mounting plate and corresponding to the longitudinal guide rail 3, a driving motor a7 arranged at the rear end of the mounting plate, and a gear arranged on the rotating shaft of the driving motor a7 and meshing with the rack 9; the transition seat 5 has the same structure as the movable seat c; the movable seats a and b include a mounting plate, two pairs of pulleys symmetrically arranged on the mounting plate and corresponding to the transverse guide rail 3.1, a driving motor b8 arranged at the rear end of the mounting plate, and a gear arranged on the rotating shaft of the driving motor b8 and meshing with the rack 9; the movable seat 4 and the transition seat 5 are provided with positioning blocks.

[0041] Example 2

[0042] like Figure 3 As shown, the two three-axis turntables 2 are respectively set as three-axis turntable a and three-axis turntable b. The initial position of the three-axis turntable a is located at the right end of the bed 1 on the transition seat 5, and the three-axis turntable b is located at the front end of the bed 1. When the two three-axis turntables 2 are switched, as shown in FIG. Figure 4 As shown, the control console starts the transition seat 5, and the transition seat 5 drives the three-axis turntable a to move to the track switching area, such as Figure 5 As shown, the control console starts the moving seat a below the three-axis turntable a, and the moving seat a drives the three-axis turntable a to move to the specified position along the transverse guide rail 3.1 and fix it; Figure 6 As shown, the moving seat b drives the three-axis turntable b to move along the transverse guide rail 3.1 to the transition seat 5 and then stops moving. Figure 7 As shown, the transition seat 5 drives the three-axis turntable b to move to the designated position along the longitudinal guide rail 3 toward the right end of the bed 1 and fix it, and the two three-axis turntables 2 are switched;

[0043] When the turntable needs to be calibrated, the optical calibration device is used to confirm the position error of the turntable after switching.

[0044] Set the center of a certain antenna aperture as the target point, its azimuth angle relative to the center of the spherical array is θ, and its elevation angle is A rectangular coordinate system is established with the center of the spherical array as the origin, the horizontal direction as the x-axis, the vertical direction as the y-axis, and the axial direction of the darkroom as the z-axis; Figure 8 As shown;

[0045] When the pitch angle is The azimuth angle is θ, and the coordinates of the target in the rectangular coordinate system are:

[0046]

[0047] When the origin is O(0,0,0), assuming that the coordinates of the turntable and the center of the spherical screen in the z direction differ by ΔL, assuming that the center of the plane where the outer frame axis is located is the origin O'(0,0,ΔL), the geometric relationship is as follows Fig. 9 As shown;

[0048] The distance between the rotation center of the turntable and the center of the array is directly measured by the optical calibration device, and the error in the z-axis direction can be obtained by comparing it with the initial distance. In the actual measurement process, multiple antennas near the axis can be measured to reduce the measurement error;

[0049] The measurement principles of the X and Y axes are the same. Take the X axis measurement as an example. When the origin is O(0,0,0), it is assumed that the coordinates of the turntable and the center of the spherical screen in the x direction differ by ΔL. It is assumed that the center of the plane where the outer frame axis is located is the origin O'(ΔL,0,0); the geometric relationship is as follows Fig.10 As shown;

[0050] The target position now becomes:

[0051]

[0052] The radius after the change is:

[0053]

[0054] Considering the calibration workload and test results comprehensively, the optical calibration device can be used to scan the spherical radius on the horizontal and vertical cross lines of the antenna array with the center antenna of the array as the intersection point. The errors in the horizontal and vertical directions of the turntable can be obtained by analyzing and calculating the scanning results; the schematic diagram of the array antenna selection is shown in Fig.11 As shown;

[0055] Correction of positioning deviation when switching turntable

[0056] If a large deviation is found after testing, the solution is to replace the mechanical positioning block.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A radio frequency semi-physical simulation turntable switching positioning device, comprising a cross-shaped bed (1), characterized in that: A pair of longitudinal guide rails (3) are arranged between the left and right ends of the cross-shaped bed, and two pairs of transverse guide rails (3.1) are symmetrically arranged between the front and rear ends of the bed (1). The two pairs of transverse guide rails (3.1) form a track switching area between the opposite ends. The two pairs of transverse guide rails (3.1) are located on both sides of the pair of longitudinal guide rails (3). Racks (9) are arranged between the pair of longitudinal guide rails (3) and the two pairs of transverse guide rails (3.1). The racks (9) are parallel to the corresponding guide rails. Two three-axis turntables (2) and a two-axis turntable (6) are arranged on the bed (1). The two-axis turntable (6) is located at the left end of the bed (1). The three-axis turntable (2) and the two-axis turntable (6) are connected to each other. The moving seat (4) is connected to the bed (1) as a whole. The three moving seats (4) are respectively arranged as a moving seat a, a moving seat b and a moving seat c. The two-axis turntable (6) is arranged on the moving seat c. The moving seats a and b are located on the transverse guide rail (3.1). The moving seats a, the moving seats b and the moving seat c drive the corresponding three-axis turntable (2) and the two-axis turntable (6) to move. A transition seat (5) is arranged between a pair of longitudinal guide rails (3). The transition seat (5) moves left and right along the longitudinal guide rail (3). A pair of transition guide rails are arranged on the upper surface of the transition seat (5). A transition rack is arranged between the pair of transition guide rails. The three-axis turntable (2) moves on the longitudinal guide rail (3) through the transition seat (5).

2. The radio frequency semi-physical simulation turntable switching positioning device according to claim 1, characterized in that: The transverse guide rail (3.1) and the transition guide rail adopt V-shaped roller guide rails, and the spacing of the transition guide rail is the same as the spacing of the transverse guide rail (3.1); the longitudinal guide rail (3) adopts a linear rolling guide rail; the moving seat c comprises a mounting plate, a slider arranged below the mounting plate and corresponding to the longitudinal guide rail (3), a driving motor a (7) arranged at the rear end of the mounting plate, and a gear arranged on the rotating shaft of the driving motor a (7) and meshing with the rack (9); the transition seat (5) has the same structure as the moving seat c; the moving seats a and b comprise a mounting plate, two pairs of pulleys symmetrically arranged on the mounting plate and corresponding to the transverse guide rail (3.1), a driving motor b (8) arranged at the rear end of the mounting plate, and a gear arranged on the rotating shaft of the driving motor b (8) and meshing with the rack (9); positioning blocks are provided on the moving seat (4) and the transition seat (5).

3. An operating method of the radio frequency semi-physical simulation turntable switching positioning device as described in claim 1, characterized in that: The two three-axis turntables (2) are respectively configured as a three-axis turntable a and a three-axis turntable b. The initial position of the three-axis turntable a is located at the right end of the bed (1) on the transition seat (5), and the three-axis turntable b is located at the front end of the bed (1). When the two three-axis turntables (2) are switched, the control console starts the transition seat (5), and the transition seat (5) drives the three-axis turntable a to move to the track switching area. The control console starts the moving seat a below the three-axis turntable a, and the moving seat a drives the three-axis turntable a to move along the transverse guide rail (3.1) to a specified position and fix it; the moving seat b drives the three-axis turntable b to move along the transverse guide rail (3.1) to the transition seat (5) and then stops moving. The transition seat (5) drives the three-axis turntable b to move along the longitudinal guide rail (3) to the right end of the bed (1) to a specified position and fix it, thereby completing the switching of the two three-axis turntables (2); When the turntable needs to be calibrated, an optical calibration device is used to confirm the position error of the turntable after switching. Set the center of a certain antenna aperture as the target point, its azimuth angle relative to the center of the spherical array is θ, and its elevation angle is A rectangular coordinate system is established with the center of the spherical array as the origin, the horizontal direction as the x-axis, the vertical direction as the y-axis, and the axial direction of the darkroom as the z-axis; When the pitch angle is The azimuth angle is θ, and the coordinates of the target in the rectangular coordinate system are: When the origin is O(0,0,0), assume that the coordinate difference between the turntable and the center of the spherical screen in the z direction is ΔL, and assume that the center of the plane where the outer frame axis is located is the origin O'(0,0,ΔL); The distance between the rotation center of the turntable and the center of the array is directly measured by the optical calibration device, and the error in the z-axis direction can be obtained by comparing it with the initial distance. In the actual measurement process, multiple antennas near the axis can be measured to reduce the measurement error; The measurement principles of X and Y axes are the same. Take X axis measurement as an example. When the origin is O(0,0,0), it is assumed that the coordinates of the turntable and the center of the spherical screen in the x direction differ by ΔL. It is assumed that the center of the plane where the outer frame axis is located is the origin O'(ΔL,0,0); The target position now becomes: The radius after the change is: Taking into account the calibration workload and test results, the optical calibration device can be used to scan the spherical radius on the horizontal and vertical cross lines of the antenna array with the center antenna of the array as the intersection point. The errors in the horizontal and vertical directions of the turntable can be obtained by analyzing and calculating the scanning results. Correction of positioning deviation when switching turntable If a large deviation is found after testing, the problem can be solved by replacing the mechanical positioning block.

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