Aircraft ground resonance test sensor placement visualisation aid and method

Abstract

The application belongs to the technical field of structural dynamics test aircraft ground resonance test, and particularly relates to an aircraft ground resonance test sensor arrangement visualization auxiliary device and method. The device comprises: a three-dimensional adjustable fixing bracket for installing a laser range finder and a laser projector, and adjusting the visual angle of a measurement and projection integrated system; the laser range finder is used for calibrating the marked aircraft measurement points; the laser projector is used for projecting the solved sensor positions and numbers onto the aircraft body surface; a sensor arrangement solving system is used for: according to the aircraft measurement point geometric information obtained by the laser range finder calibration and the aircraft geometric shape, solving the matching relationship between the visual angle of the measurement and projection integrated system and the aircraft, generating a three-dimensional space combination for projecting the sensor arrangement points; and solving the sensor arrangement points in the three-dimensional space combination one by one according to the test task book, and sending the solved sensor positions and numbers to the laser projector.

Description

Technical Field

[0001] This application belongs to the field of ground resonance testing technology for structural dynamics test aircraft, and specifically relates to a visualization auxiliary device and method for arranging sensors for ground resonance testing of aircraft. Background Technology

[0002] The main objective of the aircraft ground resonance test is to measure the frequency, mode shape, and damping of the aircraft's structural dynamic natural modes, comprehensively reflecting the aircraft's structural dynamic characteristics. It is an important test in the aeroelastic design of aircraft.

[0003] In the measurement process of aircraft ground resonance tests, the design and installation of the accelerometer arrangement is a crucial preparatory step. A proper arrangement of the accelerometer test points can accurately reflect the mode shape being tested and helps improve the accuracy of frequency and damping measurements. The sensor positions in the resonance test are specified in the test manual. The traditional method involves personnel reading the measurement point location information from the manual, measuring the locations on the aircraft surface, and then attaching the sensors to the corresponding positions. This relies on personnel using a ruler to determine the sensor placement on the aircraft. While this method is relatively easy to implement on flat structures like the wing surface, it produces significant positional errors on areas with high curvature, such as the fuselage. Furthermore, because the traditional method relies entirely on manual measurement, it consumes considerable manpower and time, resulting in a cumbersome, inefficient, and inaccurate process.

[0004] Therefore, it is desirable to have a technical solution to overcome or at least mitigate one of the aforementioned defects of the prior art. Summary of the Invention

[0005] The purpose of this application is to provide a visualization aid and method for arranging sensors for aircraft ground resonance tests, in order to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is:

[0007] A visualization aid for the arrangement of sensors in an aircraft ground resonance test includes:

[0008] The integrated measurement and projection system includes a laser rangefinder, a laser projector, and a three-dimensional adjustable mounting bracket.

[0009] The three-dimensional adjustable mounting bracket is used to mount the laser rangefinder and the laser projector, and to adjust the viewing angle of the integrated measurement and projection system;

[0010] The laser rangefinder is used to calibrate the marked aircraft measurement points;

[0011] The laser projector is used to project the calculated sensor positions and numbers onto the surface of the aircraft body.

[0012] Sensor deployment calculation system, used for:

[0013] Based on the geometric information of the aircraft measurement points obtained from the laser rangefinder calibration and the aircraft's geometric shape, the matching relationship between the viewing angle of the integrated measurement and projection system and the aircraft is calculated, and a three-dimensional spatial combination for the projection sensor placement points is generated.

[0014] The sensor placement points in the test task book are calculated one by one in the three-dimensional space assembly, and the calculated sensor positions and numbers are sent to the laser projector.

[0015] In at least one embodiment of this application, the viewing angle of the integrated measurement and projection system includes the ranging angle of the laser rangefinder and the projection angle of the laser projector. The ranging angle and the projection angle are the same angle, and the angle can completely cover the aircraft.

[0016] The second aspect of this application provides a visualization aid method for the arrangement of aircraft ground resonance test sensors, based on the visualization aid device for the arrangement of aircraft ground resonance test sensors as described above, comprising:

[0017] Step 1: Support the aircraft under test using the test support system and ensure that the aircraft is level;

[0018] Step 2: Deploy an integrated measurement and projection system to enable it to observe the entire aircraft.

[0019] Step 3: Measure typical positions of the aircraft using the integrated measurement and projection system, and transmit the measurement results to the sensor deployment and calculation system.

[0020] Step 4: The typical position points of the aircraft obtained by measurement are calculated by the sensor layout calculation system, and combined with the preset aircraft sensor layout map, a three-dimensional spatial combination of the projected sensor layout points is generated.

[0021] Step 5: Extract the sensor positions and numbers from the three-dimensional spatial assembly using the sensor deployment solution system, and send them to the integrated measurement and projection system for projection.

[0022] Step Six: The test personnel attach the sensors on the aircraft according to the projection.

[0023] In at least one embodiment of this application, the test support system includes an air spring.

[0024] In at least one embodiment of this application, the test support system includes an airbag.

[0025] In at least one embodiment of this application, the typical position point of the aircraft includes the typical position point of the nose.

[0026] In at least one embodiment of this application, the typical location point of the aircraft includes the typical location point of the tail.

[0027] In at least one embodiment of this application, the typical location points of the aircraft include the typical wingtip location points.

[0028] The invention has at least the following beneficial technical effects:

[0029] The aircraft ground resonance test sensor placement visualization auxiliary device of this application is based on laser measurement and geometric analysis technology. It uses laser planar dimension measurement and aircraft geometric shape analysis, and applies mathematical analysis methods to analyze the aircraft ground resonance test sensor placement and project it to complete the visualization annotation. This provides instructions for sensor pasting in the subsequent test process, greatly improving the efficiency and accuracy of test sensor placement. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a visualization aid for the arrangement of sensors in an aircraft ground resonance test according to one embodiment of this application;

[0031] Figure 2 This is a schematic diagram of a laser projector according to one embodiment of this application. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0034] The following is in conjunction with the appendix Figures 1 to 2 This application will be described in further detail.

[0035] The first aspect of this application provides a visualization aid for the arrangement of sensors in an aircraft ground resonance test, such as... Figure 1 As shown, it includes:

[0036] The integrated measurement and projection system includes a laser rangefinder, a laser projector, and a three-dimensional adjustable mounting bracket.

[0037] The three-dimensional adjustable mounting bracket is used to install laser rangefinders and laser projectors, and to adjust the viewing angle of the integrated measurement and projection system.

[0038] Laser rangefinders are used to calibrate pre-marked aircraft measurement points;

[0039] Laser projectors are used to project the calculated sensor positions and numbers onto the surface of the aircraft.

[0040] Sensor deployment calculation system, used for:

[0041] Based on the geometric information of the aircraft measurement points obtained from the laser rangefinder calibration and the aircraft's geometric shape, the matching relationship between the viewing angle of the integrated measurement and projection system and the aircraft is calculated, and a three-dimensional spatial combination for the projection sensor placement points is generated.

[0042] The sensor placement points in the test task book are calculated one by one in the three-dimensional space assembly, and the calculated sensor positions and numbers are sent to the laser projector.

[0043] This application discloses a visualization aid for the placement of sensors in an aircraft ground resonance test, comprising two parts: an integrated measurement and projection system and a sensor placement calculation system. The integrated measurement and projection system mainly consists of a laser rangefinder, a laser projector, and a three-dimensional adjustable mounting bracket. The laser rangefinder and laser projector are mounted on the three-dimensional adjustable mounting bracket, enabling three-dimensional movement and adjustment. Adjustment via the bracket ensures that the rangefinder's measuring angle and the laser projector's projection angle are the same, while also ensuring complete coverage of the aircraft. The sensor placement calculation system is sensor placement calculation software installed on a laptop computer for geometric correction and projected image output. It calculates the matching relationship between the integrated measurement and projection system's perspective and the aircraft's geometry based on the geometric information of the aircraft's main measurement points and its overall shape, forming a three-dimensional spatial assembly for projecting sensor placement points to obtain the sensor positions. By projecting each sensor position onto the aircraft surface, it assists test personnel in attaching the accelerometer sensors.

[0044] The main idea of ​​the visual auxiliary device for the placement of sensors in the aircraft ground resonance test proposed in this application is to apply automatic measurement and mathematical analysis methods, involving curved surface optical measurement technology and curved surface projection geometric correction technology. By projecting the analyzed coordinate points onto the aircraft surface, it can quickly, efficiently and accurately assist test personnel in attaching sensors.

[0045] Based on the aforementioned visual aid device for the arrangement of aircraft ground resonance test sensors, the second aspect of this application provides a visual aid method for the arrangement of aircraft ground resonance test sensors. Taking a full-aircraft ground resonance test of an aircraft as an example, the aircraft is supported by air springs and airbags, such as... Figure 2 As shown. Before the test, acceleration sensors need to be installed on the aircraft for vibration measurement according to the test task requirements. The visualization-assisted method for sensor installation in aircraft ground resonance tests includes the following process:

[0046] Step 1: Support the aircraft under test using the test support system and ensure that the aircraft is level;

[0047] Step 2: Deploy an integrated measurement and projection system to enable it to observe the entire aircraft.

[0048] Step 3: Measure typical positions of the aircraft using the integrated measurement and projection system, and transmit the measurement results to the sensor deployment and calculation system.

[0049] Among them, typical positions of an aircraft include special geometric points such as typical positions of the nose, tail, and wingtips.

[0050] Step 4: The typical position points of the aircraft obtained by measurement are calculated by the sensor layout calculation system, and combined with the preset aircraft sensor layout map, a three-dimensional spatial combination of the projected sensor layout points is generated.

[0051] This three-dimensional spatial assembly is a combination of a measurement and projection integrated system and an aircraft.

[0052] Step 5: Extract the sensor positions and numbers from the three-dimensional spatial assembly using the sensor deployment solution system, and send them to the integrated measurement and projection system for projection.

[0053] Step Six: The test personnel attach the sensors on the aircraft according to the projection.

[0054] This application presents a visualization-assisted method for sensor placement in aircraft ground resonance tests. By applying laser measurement, three-dimensional spatial geometric analysis, and laser projection, it measures and analyzes the mapping relationship of sensor placement points in the test specifications, and ultimately automatically projects these points onto the aircraft surface, assisting test personnel in completing the sensor placement. This method allows for accurate projection of the test sensor placement onto the aircraft surface during the preparation phase of a full-aircraft ground resonance test, providing convenience for subsequent sensor placement.

[0055] The visualization-assisted method for sensor placement in aircraft ground resonance tests presented in this application has a reliable and clear theoretical basis, a simple analysis method, and convenient data processing. It can quickly display the sensor placement on the aircraft surface during ground resonance tests and accurately determine the sensor's attachment position, greatly improving the efficiency and accuracy of test preparation and significantly saving human resources and test time. Furthermore, this application can also be applied to sensor placement in dynamic tests in other fields (such as aerospace, construction, and vehicles) to improve test efficiency and accuracy.

[0056] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A visualization auxiliary device for arranging sensors in an aircraft ground resonance test, characterized in that, include: The integrated measurement and projection system includes a laser rangefinder, a laser projector, and a three-dimensional adjustable mounting bracket. The three-dimensional adjustable mounting bracket is used to mount the laser rangefinder and the laser projector, and to adjust the viewing angle of the integrated measurement and projection system; The laser rangefinder is used to calibrate the marked aircraft measurement points; The laser projector is used to project the calculated sensor positions and numbers onto the surface of the aircraft body. Sensor deployment calculation system, used for: Based on the geometric information of the aircraft measurement points obtained from the laser rangefinder calibration and the aircraft's geometric shape, the matching relationship between the viewing angle of the integrated measurement and projection system and the aircraft is calculated, and a three-dimensional spatial combination for the projection sensor placement points is generated. The sensor placement points in the test task book are calculated one by one in the three-dimensional space assembly, and the calculated sensor positions and numbers are sent to the laser projector. The viewing angle of the integrated measurement and projection system includes the ranging angle of the laser rangefinder and the projection angle of the laser projector. The ranging angle and the projection angle are the same angle, and this angle can completely cover the aircraft. The sensor placement calculation system is a sensor placement calculation software installed on a laptop computer for geometric correction and projection image output. It can calculate the matching relationship between the viewpoint of the integrated measurement projection system and the aircraft based on the geometric information of the main measurement points and the aircraft's geometric shape, forming a three-dimensional spatial combination for projecting sensor placement points to obtain the sensor positions. By projecting each sensor position onto the surface of the aircraft, it assists the test personnel in completing the placement of the accelerometer sensor.

2. A visual aid method for arranging aircraft ground resonance test sensors, based on the visual aid device for arranging aircraft ground resonance test sensors as described in claim 1, characterized in that, include: Step 1: Support the aircraft under test using the test support system and ensure that the aircraft is level; Step 2: Deploy an integrated measurement and projection system to enable it to observe the entire aircraft. Step 3: Measure typical positions of the aircraft using the integrated measurement and projection system, and transmit the measurement results to the sensor deployment and calculation system. Step 4: The typical position points of the aircraft obtained by measurement are calculated by the sensor layout calculation system, and combined with the preset aircraft sensor layout map, a three-dimensional spatial combination of the projected sensor layout points is generated. Step 5: Extract the sensor positions and numbers from the three-dimensional spatial assembly using the sensor deployment solution system, and send them to the integrated measurement and projection system for projection. Step Six: The test personnel attach the sensors on the aircraft according to the projection.

3. The visual auxiliary device for the arrangement of aircraft ground resonance test sensors according to claim 2, characterized in that, The test support system includes air springs.

4. The visualization auxiliary device for the arrangement of aircraft ground resonance test sensors according to claim 3, characterized in that, The test support system includes airbags.

5. The visual auxiliary device for the arrangement of aircraft ground resonance test sensors according to claim 4, characterized in that, Typical positions of an aircraft include the typical position of the nose.

6. The visualization auxiliary device for the arrangement of aircraft ground resonance test sensors according to claim 5, characterized in that, Typical positions of an aircraft include the typical position of its tail.

7. The visualization auxiliary device for the arrangement of aircraft ground resonance test sensors according to claim 6, characterized in that, Typical positions of an aircraft include typical wingtip positions.

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