A test device for follow-up loading of retracting and extending mechanism

Abstract

The present application belongs to the field of aviation strength test technology, and particularly relates to a test device for follow-up loading of a retractable mechanism. It comprises: a retractable mechanism, a rocker box segment, an angle sensor, a loading actuator, a force sensor, and a follower actuator. One end of the retractable mechanism is fixed by a first rotating shaft; one end of the rocker box segment is fixed by a second rotating shaft; the angle sensor is mounted on the second rotating shaft of the rocker box segment; the loading actuator is arranged inside the rocker box segment, one end of the loading actuator is fixed, and the other end is connected to the other end of the retractable mechanism by a steel wire rope and a guide pulley; the force sensor is mounted on the steel wire rope; one end of the follower actuator is fixed by a third rotating shaft, and the other end is connected to the outer wall of the rocker box segment by a fourth rotating shaft. The test device for follow-up loading of a retractable mechanism of the present application can solve the problem of rapid follow-up loading and can reduce the complexity of the test.

Description

Technical Field

[0001] The present application belongs to the technical field of aviation strength testing, and in particular relates to a testing device for dynamic loading of a retractable mechanism. Background Art

[0002] Certain retractable aircraft components, such as landing gear and large antenna systems, must undergo retraction and extension testing to verify their reliability. This test involves tracking the test piece's retraction and extension at varying angles, simulating wind loads and applying horizontal forces to the test piece. The test piece's wide retraction angles, rapid speeds, and long loading strokes present significant challenges in simulating loading. Using a hydraulic actuator to follow the loading would require an extremely high-flow hydraulic source and specialized actuators due to the large stroke and high speed, making the solution complex, costly, or even infeasible.

[0003] The currently used test methods also have disadvantages such as complex structure, cumbersome control, low simulation level and poor followability.

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

[0005] The purpose of the present application is to provide a test device for dynamic loading of a retractable mechanism, so as to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is:

[0007] A test device for dynamic loading of a retractable mechanism, comprising:

[0008] a retractable mechanism, one end of which is fixed by a first rotating shaft;

[0009] A rocker box section, one end of which is fixed by a second rotating shaft;

[0010] An angle sensor, the angle sensor is mounted on the second rotating shaft of the rocker box section;

[0011] A loading actuator, which is arranged inside the rocker box section, one end of which is fixed, and the other end of which is connected to the other end of the retracting and extending mechanism via a steel wire rope and a guide pulley;

[0012] a force sensor mounted on the steel wire rope;

[0013] A follower actuator, one end of which is fixed via a third rotating shaft, and the other end of which is connected to the outer wall of the rocker box section via a fourth rotating shaft.

[0014] In at least one embodiment of the present application, the retractable mechanism is a landing gear.

[0015] In at least one embodiment of the present application, the retractable mechanism is a large antenna device.

[0016] In at least one embodiment of the present application, the rocker box segment is driven to a specified position by the follower actuator, and the angular position of the rocker box segment and the angular position of the retracting mechanism have the following relationship:

[0017]

[0018] Among them, α is the rocker box section angle, α' is the retractable mechanism angle, r is the rocker box section length, and R is the retractable mechanism length.

[0019] The invention has at least the following beneficial technical effects:

[0020] The test device for follow-up loading of the retracting and extending mechanism of the present application adopts an actuator to drive the movement of the rocker arm to follow the retracting and extending action of the retracting and extending mechanism, and adjusts the loading load by loading the actuator. Compared with the existing loading technology, it has the advantages of rapid following, large range of movement, large load bearing capacity and maintaining horizontal loading at all times. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of a test device for dynamic loading of a retractable mechanism according to one embodiment of the present application;

[0022] Figure 2 It is a side view of a test device for dynamic loading of a retractable mechanism according to one embodiment of the present application;

[0023] Figure 3 This is a schematic diagram of the retraction and loading movement of a test device for follow-up loading of a retraction mechanism according to one embodiment of the present application.

[0024] in:

[0025] 1- rocker box section; 2- loading actuator; 3- guide pulley; 4- wire rope; 5- following actuator; 6- angle sensor; 7- force sensor. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments 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 the embodiments. 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 understood 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.

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation. Therefore, it should not be understood as limiting the scope of protection of this application.

[0028] The following is combined with Figures 1 to 3 This application is described in further detail.

[0029] The present application provides a test device for follow-up loading of a retractable mechanism, comprising: a retractable mechanism, a rocker box section 1, an angle sensor 6, a loading actuator 2, a force sensor 7 and a follower actuator 5.

[0030] Specifically, one end of the retracting and extending mechanism is fixed by a first rotating shaft, and the retracting and extending mechanism can rotate around the first rotating shaft; one end of the rocker box segment 1 is fixed by a second rotating shaft; the angle sensor 6 is installed on the second rotating shaft of the rocker box segment 1, and is used to measure the rotation angle of the rocker box segment 1; the loading actuator cylinder 2 is arranged inside the rocker box segment 1, wherein one end of the loading actuator cylinder 2 is fixed, and the other end is connected to the other end of the retracting and extending mechanism through a wire rope 4 and a guide pulley 3, and the connection point between the wire rope 4 and the retracting and extending mechanism serves as a loading point; the force sensor 7 is installed on the wire rope 4, and is used to realize the measurement of the load size; one end of the following actuator cylinder 5 is fixed by a third rotating shaft, and the other end is connected to the outer wall of the rocker box segment 1 through a fourth rotating shaft.

[0031] The test device for follow-up loading of the retraction and extension mechanism of the present application is characterized by installing a loading actuator 2 and a guide pulley 3 inside the rocker box section 1, installing an angle sensor 6 at the rotating shaft of the rocker box section 1, and the loading actuator 2 is connected to the retraction and extension mechanism such as the landing gear through a wire rope 4 and a force sensor 7, and applies the loading load to the retraction and extension mechanism. A follow-up actuator 5 is installed at an appropriate position outside the rocker box section 1 to control the rotation of the rocker arm.

[0032] The test device for dynamic loading of the retractable mechanism of the present application can be a landing gear, a large antenna device or other retractable mechanism, and the retractable mechanism such as the landing gear is equipped with an angle sensor that can measure its rotation angle.

[0033] The test device for dynamic loading of a retractable mechanism in this application is designed with an appropriate length and installation height of the rocker box segment 1, depending on the length of the retractable mechanism, such as the landing gear, and the location of the loading point, to ensure that the rocker box segment 1 covers the range of motion of the retractable mechanism, such as the landing gear. The model, load, length, and other parameters of the follower actuator 5 are selected based on the range of motion of the rocker box segment 1 and the test load, and the installation position and angle are determined.

[0034] The test device for follow-up loading of the retracting and extending mechanism of the present application first configures the relationship between the position of the retracting and extending mechanism, such as the landing gear, and the applied load. During the follow-up loading process, the load size is converted based on the rotational angle position of the retracting and extending mechanism, such as the landing gear, in real-time feedback, and the corresponding load is applied by the loading actuator 2. The rotational angle position of the rocker box segment 1 that keeps the wire rope 4 in a horizontal state is also converted based on the angular position of the retracting and extending mechanism, such as the landing gear, in real-time feedback, and the rocker box segment 1 is driven to the specified position by the follower actuator 5. In this embodiment, the angular position of the rocker box segment 1 and the angular position of the retracting and extending mechanism have the following relationship:

[0035]

[0036] Among them, α is the rocker box section angle, α' is the retractable mechanism angle, r is the rocker box section length, and R is the retractable mechanism length.

[0037] From the above formula, it can be seen that when the length of the rocker box section is the same as the length of the retracting mechanism, the rotation angles of the two are the same.

[0038] The present invention's testing device for dynamic loading of retractable mechanisms uses an actuator to drive the movement of a rocker arm to follow the retraction and extension of landing gear and other retractable mechanisms, and adjusts the loading load by loading the actuator. Compared to existing loading technologies, this device offers advantages such as rapid tracking, a wide range of motion, high load capacity, and constant horizontal loading. Furthermore, the device's simple structure and easy control can effectively reduce failure rates, improve test efficiency, and achieve excellent simulation results.

[0039] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A test device for dynamic loading of a retractable mechanism, characterized in that: include: a retractable mechanism, one end of which is fixed by a first rotating shaft; A rocker box section (1), one end of the rocker box section (1) being fixed via a second rotating shaft; An angle sensor (6), the angle sensor (6) being mounted on the second rotating shaft of the rocker box section (1); A loading actuator (2), the loading actuator (2) being arranged inside the rocker box section (1), one end of the loading actuator (2) being fixed, and the other end being connected to the other end of the retracting and extending mechanism via a steel wire rope (4) and a guide pulley (3); A force sensor (7), the force sensor (7) being mounted on the steel wire rope (4); A follower actuator (5), one end of which is fixed via a third rotating shaft, and the other end of which is connected to the outer wall of the rocker box section (1) via a fourth rotating shaft; According to the length of the retractable mechanism and the position of the loading point, the length and installation height of the rocker box section (1) are designed so that the rocker box section (1) can cover the motion range of the retractable mechanism; according to the motion range of the rocker box section (1) and the test load, the parameters of the follower actuator (5) are selected and the installation position and angle are determined; The relationship between the position of the retractable mechanism and the applied load is configured. During the follow-up loading process, the load size is converted according to the rotation angle position fed back in real time by the retractable mechanism, and the corresponding load is applied by the loading actuator (2); and the rotation angle position of the rocker box section (1) that keeps the wire rope (4) in a horizontal state is converted according to the rotation angle position fed back in real time by the retractable mechanism, and the rocker box section (1) is driven by the follower actuator (5) to reach the rotation angle position that keeps the wire rope (4) in a horizontal state.

2. The test device for dynamic loading of the retractable mechanism according to claim 1, characterized in that: The retractable mechanism is a landing gear.

3. The test device for dynamic loading of a retractable mechanism according to claim 1, characterized in that: The retractable mechanism is a large antenna device.

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