Airplane ground resonance test sensor arrangement visualization auxiliary device and method

Abstract

The invention belongs to the technical field of aircraft ground resonance tests in structural dynamics tests, and particularly relates to an aircraft ground resonance test sensor arrangement visualization auxiliary device and method. The device comprises a three-dimensional adjustable fixed bracket which is used 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 calculated sensor positions and numbers to the surface of an aircraft body; the sensor arrangement resolving system is used for resolving a matching relationship between a visual angle of the measurement and projection integrated system and an airplane according to the geometric information of the airplane measurement points obtained by calibration of the laser range finder and the geometric profile of the airplane, and generating a three-dimensional space assembly for projecting sensor arrangement points; the sensor arrangement points in the test task book are calculated in the three-dimensional space combination body one by one, and the calculated sensor positions and numbers are sent to the laser projector.

Description

Technical Field

[0001] The present application belongs to the technical field of structural dynamics test aircraft ground resonance test, and in particular to a sensor arrangement visualization auxiliary device and method for aircraft ground resonance test. Background Art

[0002] The main goal of the aircraft ground resonance test is to measure the frequency, modal vibration shape and damping of the aircraft structural dynamic natural mode, which fully reflects the structural dynamic characteristics of the aircraft. It is an important test in the aircraft aeroelastic design work.

[0003] In the measurement process of the aircraft ground resonance test, the layout design and pasting of the acceleration sensor is an important test preparation work. The reasonable layout of the acceleration sensor test points can accurately reflect the vibration mode of the tested mode and help improve the accuracy of the measurement frequency and damping. The position of the sensor in the resonance test is specified in the test task book. The traditional method is that the test personnel read the measurement point position information in the task book, measure the surface of the aircraft and paste the sensor to the corresponding position, and rely on the test personnel to determine the sensor pasting position on the aircraft with a ruler. This method is easier to implement on relatively flat structures such as aircraft wings, but it will produce large position errors in places with large curvature of aircraft surface structures such as fuselages; at the same time, because the traditional method relies on completely manual measurement, it also occupies a large amount of human resources and test cycles, and the process is very cumbersome, inefficient and not accurate.

[0004] Therefore, it is desired to have a technical solution to overcome or at least alleviate at least one of the above-mentioned defects of the prior art. Summary of the invention

[0005] The purpose of the present application is to provide a device and method for visualizing the arrangement of sensors in an aircraft ground resonance test, so as to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is:

[0007] An aircraft ground resonance test sensor arrangement visualization auxiliary device, comprising:

[0008] The integrated measurement and projection system comprises a laser rangefinder, a laser projector and a three-dimensional adjustable fixed bracket, wherein:

[0009] The three-dimensionally adjustable fixing bracket is used to install 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 placement solver for:

[0013] The matching relationship between the viewing angle of the integrated measurement and projection system and the aircraft is calculated based on the geometric information of the aircraft measurement points obtained by the calibration of the laser rangefinder and the geometric shape of the aircraft, and a three-dimensional spatial assembly for projection sensor arrangement points is generated;

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

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

[0016] A second aspect of the present application provides a visualization assistance method for arranging sensors for a ground resonance test of an aircraft, based on the visualization assistance device for arranging sensors for a ground resonance test of an aircraft as described above, comprising:

[0017] Step 1: Support the aircraft to be tested through the test support system and ensure that the aircraft is level;

[0018] Step 2: Arrange the integrated measurement and projection system so that it can observe the entire picture of the aircraft;

[0019] Step 3: measure the typical position points of the aircraft through the integrated measurement and projection system, and transmit the measurement results to the sensor layout solution system;

[0020] Step 4: The typical position points of the measured aircraft are solved by the sensor layout solving system, and a three-dimensional spatial combination of the projection sensor layout points is generated in combination with a preset aircraft sensor layout diagram;

[0021] Step 5: The sensor position and number are extracted from the three-dimensional space assembly by the sensor arrangement solution system, and sent to the measurement and projection integration system for projection;

[0022] Step 6: The test personnel paste the sensor on the aircraft according to the projection.

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

[0024] In at least one embodiment of the present application, the test support system includes an air bag.

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

[0026] In at least one embodiment of the present application, the typical position point of the aircraft includes a typical position point of the tail.

[0027] In at least one embodiment of the present application, the typical position point of the aircraft includes a wingtip typical position point.

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

[0029] The aircraft ground resonance test sensor layout visualization auxiliary device of the present application is based on laser measurement and geometric analysis technology. It uses laser plane dimension measurement, aircraft geometric shape analysis, and mathematical analysis methods to analyze the aircraft ground resonance test sensor layout and project it to complete visual annotation, providing instructions for sensor pasting in subsequent test processes, greatly improving the efficiency and accuracy of test sensor layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of a visualization auxiliary device for arranging sensors for an aircraft ground resonance test according to one embodiment of the present application;

[0031] Figure 2 This is a schematic diagram of laser projector projection according to one embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the embodiment of this application will be described in more detail below in conjunction with the drawings in the embodiment of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of this application, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain this application, and should not be construed as limitations on this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of this application are described in detail below in conjunction with the drawings.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.

[0034] The following is combined with Figure 1 to Figure 2 This application is described in further detail.

[0035] The first aspect of the present application provides a visual auxiliary device for the arrangement of sensors for an aircraft ground resonance test, such as Figure 1 As shown, including:

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

[0037] The three-dimensional adjustable fixing bracket is used to install the laser rangefinder and laser projector, and adjust the viewing angle of the integrated measurement and projection system;

[0038] The laser rangefinder is used to calibrate the marked aircraft measurement points;

[0039] The laser projector is used to project the calculated sensor positions and numbers onto the aircraft body surface;

[0040] Sensor placement solver for:

[0041] According to the geometric information of the aircraft measurement points obtained by the laser rangefinder calibration and the geometric shape of the aircraft, the matching relationship between the viewing angle of the measurement and projection integrated system and the aircraft is calculated to generate a three-dimensional space combination for the projection sensor arrangement points;

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

[0043] The aircraft ground resonance test sensor layout visualization auxiliary device of the present application includes two parts: a measurement projection integrated system and a sensor layout solution system. The main components of the measurement projection integrated system include a laser rangefinder, a laser projector and a three-dimensional adjustable fixed bracket. The laser rangefinder and the laser projector are installed on the three-dimensional adjustable fixed bracket, which can realize three-dimensional movement and steering adjustment. The three-dimensional adjustable fixed bracket is adjusted to ensure that the ranging angle of the laser rangefinder and the projection angle of the laser projector are the same angle, and at the same time ensure that the angle can fully cover the aircraft. The sensor layout solution system is a sensor layout solution software installed in a laptop computer for geometric correction and projection image output. It can solve the matching relationship between the measurement projection integrated system angle and the aircraft according to the geometric information of the main measurement points of the aircraft and the geometric shape of the aircraft, forming a three-dimensional space combination for projecting sensor layout points, and obtaining the sensor position. By projecting each sensor position onto the surface of the aircraft body, the test personnel are assisted to complete the pasting of the acceleration sensor.

[0044] The main idea of ​​the aircraft ground resonance test sensor layout visualization auxiliary device of the present application is to apply the methods of automatic measurement and mathematical analysis, involving curved surface optical measurement technology and curved surface projection geometric correction technology. By projecting the resolved coordinate points onto the aircraft surface, it can quickly, efficiently and accurately assist the test personnel in sensor pasting.

[0045] Based on the above-mentioned aircraft ground resonance test sensor layout visualization auxiliary device, the second aspect of the present application provides an aircraft ground resonance test sensor layout visualization auxiliary method, taking a ground resonance test of a certain aircraft as an example, the aircraft is supported by air springs and air bags, such as Figure 2 As shown. Before the test, acceleration sensors need to be arranged on the aircraft for vibration measurement according to the test task book. The visualization auxiliary method for the arrangement of sensors for the aircraft ground resonance test includes the following process:

[0046] Step 1: Support the aircraft to be tested through the test support system and ensure that the aircraft is level;

[0047] Step 2: Arrange the integrated measurement and projection system so that it can observe the entire picture of the aircraft;

[0048] Step 3: measure the typical position points of the aircraft through the integrated measurement and projection system, and transmit the measurement results to the sensor layout solution system;

[0049] Among them, the typical position points of the aircraft include special geometric points such as the typical position point of the nose, the typical position point of the tail, and the typical position point of the wing tip.

[0050] Step 4: The typical position points of the measured aircraft are solved by the sensor layout solving system, and a three-dimensional spatial combination of the projection sensor layout points is generated in combination with a preset aircraft sensor layout diagram;

[0051] The three-dimensional space combination is a three-dimensional space combination of a measurement and projection integrated system + an aircraft.

[0052] Step 5: The sensor position and number are extracted from the three-dimensional space assembly by the sensor arrangement solution system, and sent to the measurement and projection integration system for projection;

[0053] Step 6: The test personnel paste the sensor on the aircraft according to the projection.

[0054] The aircraft ground resonance test sensor layout visualization auxiliary method of the present application measures and analyzes the mapping relationship of sensor layout points in the test task book by applying laser measurement, three-dimensional space geometric analysis, and laser projection methods, and finally automatically projects the sensor layout points onto the aircraft body surface to assist test personnel in completing sensor layout. In the preparation stage of the full-aircraft ground resonance test, the layout of the test sensors can be accurately projected onto the surface of the aircraft to be tested to complete visual annotation, which facilitates the subsequent test sensor pasting.

[0055] The aircraft ground resonance test sensor layout visualization auxiliary method of the present application has a reliable and clear theoretical basis, a simple analysis method, and convenient data processing. It can quickly display the sensor layout on the body surface in the aircraft ground resonance test, and can accurately obtain the sensor sticking position, which greatly improves the efficiency and accuracy of the test preparation work and greatly saves human resources and test cycles in the test preparation process. At the same time, the present application can also be applied to the sensor layout of dynamic tests in other fields (such as aerospace, construction, vehicles, etc.) to improve the efficiency and accuracy of the test.

[0056] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A visual auxiliary device for sensor arrangement in aircraft ground resonance test, characterized in that: include: The integrated measurement and projection system comprises a laser rangefinder, a laser projector and a three-dimensional adjustable fixed bracket, wherein: The three-dimensionally adjustable fixing bracket is used to install 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 placement solver for: The matching relationship between the viewing angle of the integrated measurement and projection system and the aircraft is calculated based on the geometric information of the aircraft measurement points obtained by the calibration of the laser rangefinder and the geometric shape of the aircraft, and a three-dimensional spatial assembly for projection sensor arrangement points is generated; The sensor arrangement points in the test task book are solved one by one in the three-dimensional space combination, and the solved sensor positions and numbers are sent to the laser projector.

2. The aircraft ground resonance test sensor layout visualization auxiliary device according to claim 1, characterized in that: The viewing angle of the integrated measurement and projection system includes the ranging viewing angle of the laser rangefinder and the projection viewing angle of the laser projector. The ranging viewing angle and the projection viewing angle are the same viewing angle, and the viewing angle can completely cover the aircraft.

3. A visualization assistance method for sensor layout of an aircraft ground resonance test, based on the visualization assistance device for sensor layout of an aircraft ground resonance test according to any one of claims 1 to 2, characterized in that: include: Step 1: Support the aircraft to be tested through the test support system and ensure that the aircraft is level; Step 2: Arrange the integrated measurement and projection system so that it can observe the entire picture of the aircraft; Step 3: measure the typical position points of the aircraft through the integrated measurement and projection system, and transmit the measurement results to the sensor layout solution system; Step 4: The typical position points of the measured aircraft are solved by the sensor layout solving system, and a three-dimensional spatial combination of the projection sensor layout points is generated in combination with a preset aircraft sensor layout diagram; Step 5: The sensor position and number are extracted from the three-dimensional space assembly by the sensor arrangement solution system, and sent to the measurement and projection integration system for projection; Step 6: The test personnel paste the sensor on the aircraft according to the projection.

4. The aircraft ground resonance test sensor arrangement visualization auxiliary device according to claim 3, characterized in that: The test support system includes an air spring.

5. The aircraft ground resonance test sensor arrangement visualization auxiliary device according to claim 4, characterized in that: The test support system includes an air bag.

6. The aircraft ground resonance test sensor arrangement visualization auxiliary device according to claim 5, characterized in that: The typical position points of the aircraft include the typical position points of the nose.

7. The aircraft ground resonance test sensor arrangement visualization auxiliary device according to claim 6, characterized in that: The typical position points of the aircraft include the typical position points of the tail.

8. The aircraft ground resonance test sensor arrangement visualization auxiliary device according to claim 7, characterized in that: Typical position points of an aircraft include typical position points of wingtips.

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