Airborne inertial navigation system test verification platform based on ship motion simulation

Abstract

The utility model discloses an airborne inertial navigation system test verification platform based on ship motion simulation, and relates to the field of ship motion simulation experiments. The simulation cabin is mounted on the six-axis sea wave simulator; wherein an airborne inertial navigation module is elastically mounted in the simulation cabin; a fixed cylinder is fixed on the inner side of the simulation cabin, an electric push rod is fixed in the fixed cylinder, one end of the electric push rod is connected with a sliding block, a spring is fixed on one side of the sliding block, and an insertion block is fixed on one end of the spring; the larger the shaking amplitude of the airborne inertial navigation module in the simulation cabin is, the shaking amplitude of the airborne inertial navigation module in the simulation cabin can be controlled through the amplitude of the extrusion spring, the simulation cabin is used for simulating parameters such as continuous wave fluctuation, motion frequency and amplitude on the sea, and the simulation authenticity is improved.

Description

Technical Field

[0001] This utility model relates to the field of ship motion simulation experiments, and in particular to a test and verification platform for airborne inertial navigation systems based on ship motion simulation. Background Technology

[0002] Ships are affected by a variety of factors in the marine environment, including wind, waves, and currents, which cause ships to produce complex six-degree-of-freedom motions (i.e., heave, roll, pitch, yaw, surge, and sway). In order to study the motion characteristics of ships and the performance of related equipment in the ship motion environment, ship motion simulation technology has emerged.

[0003] Traditional ship motion studies primarily rely on physical experiments, such as planar motion mechanism (PMM) experiments. However, this method has drawbacks, including high equipment costs, a large amount of repetitive work, high requirements for sensor sensitivity, and the inability to provide information on the flow field around the ship.

[0004] Therefore, it is necessary to propose a test and verification platform for airborne inertial navigation systems based on ship motion simulation to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a test and verification platform for airborne inertial navigation systems based on ship motion simulation, in order to address the problem that traditional ship motion research mainly relies on physical experiments, such as planar motion mechanism (PMM) experiments. However, this method has drawbacks such as high equipment cost, large amount of repetitive work, high requirements for sensor sensitivity, and inability to provide information on the flow field around the ship.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a test and verification platform for an airborne inertial navigation system based on ship motion simulation, comprising:

[0007] Six-axis wave simulator;

[0008] The simulation chamber is mounted on a six-axis wave simulator.

[0009] The simulated cabin contains an airborne inertial navigation module that is flexibly installed.

[0010] A fixed cylinder is fixed inside the simulation chamber, and an electric push rod is fixed inside the fixed cylinder. One end of the electric push rod is connected to a slider, a spring is fixed to one side of the slider, and a plug is fixed to one end of the spring.

[0011] The airborne inertial navigation module has a slot for inserting a plug;

[0012] Multiple fixed cylinders are provided.

[0013] Preferably, the six-axis wave simulator includes a base and a fixed base, and six electric cylinders are movably installed between the base and the fixed base;

[0014] The fixed base has a fixed groove, and an electromagnet is arranged in the inner circle of the fixed groove. The simulation chamber has a magnetic block embedded in it that corresponds to the magnetic attraction of the electromagnet.

[0015] Preferably, a fan is fixed inside the simulation cabin, and the air outlet of the fan faces the airborne inertial navigation module.

[0016] Preferably, an electric heating tube is provided below the airborne inertial navigation module, and the electric heating tube is fixed inside the simulation cabin.

[0017] Preferably, a top cover is threaded onto the top of the simulation chamber.

[0018] Preferably, an exhaust port is provided on the outside of the simulation chamber, the exhaust port is connected to the interior of the simulation chamber, and an electromagnetic valve is installed in the exhaust port.

[0019] Preferably, it also includes a data acquisition and processing module and a control module. The data acquisition and processing module is used to acquire navigation data output by the airborne inertial navigation system and compare and analyze it with the input parameters of the six-axis wave simulator. The control module is used to control the motion mode and parameter settings of the six-axis wave simulator.

[0020] The technical effects and advantages of this utility model are as follows:

[0021] 1. By using the electric push rod, slider, spring and plug, the airborne inertial navigation module can be fixed and released. At the same time, it can simulate a certain vibration and impact environment. The longer the electric push rod extends, the greater the spring compression, the stronger the squeezing and fixing strength of the airborne inertial navigation module. When there is external movement, the airborne inertial navigation module will sway less in the simulated cabin.

[0022] 2. When the electric push rod retracts, the less the spring is compressed, the greater the swaying amplitude of the airborne inertial navigation module in the simulation cabin when there is external movement. By squeezing the spring, the swaying amplitude of the internal airborne inertial navigation module can be controlled to simulate the continuous wave undulations, motion frequency, amplitude and other parameters at sea, thereby improving the realism of the simulation.

[0023] 3. By controlling the extension and retraction of six electric cylinders, various complex motions experienced by a ship in the ocean can be simulated, including heave, roll, pitch, yaw, surge, and sway. This multi-degree-of-freedom motion simulation can provide a test environment close to the real ship motion for airborne inertial navigation modules, thereby more accurately evaluating their performance under complex sea conditions.

[0024] 4. The data acquisition and processing module is used to acquire navigation data output by the airborne inertial navigation system and compare and analyze it with the input parameters of the six-axis wave simulator. Through comparative analysis, the navigation accuracy, stability and reliability of the airborne inertial navigation system under different sea conditions can be evaluated. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the test and verification platform for the airborne inertial navigation system based on ship motion simulation of this utility model.

[0026] Figure 2 This is a schematic diagram of the internal structure of the simulation cabin of this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of the fixing cylinder of this utility model.

[0028] In the diagram: 1. Base; 2. Electric cylinder; 3. Fixed seat; 4. Fixed groove; 5. Electromagnet; 6. Simulation cabin; 7. Magnetic block; 8. Electric heating tube; 9. Top cover; 10. Airborne inertial navigation module; 11. Exhaust port; 12. Fixed cylinder; 13. Fan; 14. Electric push rod; 15. Slider; 16. Spring; 17. Insert block. Detailed Implementation

[0029] This utility model provides, for example Figures 1-3 The test and verification platform for an airborne inertial navigation system based on ship motion simulation, as shown, includes:

[0030] A six-axis wave simulator, comprising a base 1 and a fixed base 3, wherein six electric cylinders 2 are movably installed between the base 1 and the fixed base 3;

[0031] Simulation Module 6 is installed on a six-axis wave simulator. The onboard inertial navigation module 10 is flexibly installed inside the simulation module 6.

[0032] By installing the airborne inertial navigation module 10 inside the simulation cabin 6, which is mounted on a six-axis wave simulator, the motion of a ship at sea is simulated, and the impact of the simulated ship motion experiment on the airborne inertial navigation module 10 is investigated.

[0033] Specifically, the six-axis wave simulator can achieve six degrees of freedom of motion, namely translational motion along the X, Y, and Z directions and rotational motion around the X, Y, and Z axes.

[0034] By controlling the extension and retraction of six electric cylinders 2, various complex motions experienced by a ship in the ocean can be simulated, including heave, roll, pitch, yaw, surge, and sway. This multi-degree-of-freedom motion simulation can provide the airborne inertial navigation module 10 with a test environment close to real ship motion, thereby more accurately evaluating its performance under complex sea conditions.

[0035] The fixed base 3 has a fixed groove 4, and an electromagnet 5 is arranged in the inner circle of the fixed groove 4. The simulation chamber 6 has a magnetic block 7 that corresponds to the magnetic attraction of the electromagnet 5.

[0036] The simulation chamber 6 is placed inside the fixing slot 4. By activating the electromagnet 5, a magnetic force is generated, allowing the electromagnet 5 to be attracted and connected to the magnetic block 7, thus completing the fixation. At the same time, when the electromagnet 5 is de-energized and loses its magnetic force, the magnetic attraction can be released. This provides an efficient and reliable connection method when the simulation chamber 6 needs to be quickly replaced or adjusted, reducing the time and procedures for personnel installation.

[0037] A fixed cylinder 12 is fixed inside the simulation chamber 6. An electric push rod 14 is fixed inside the fixed cylinder 12. One end of the electric push rod 14 is connected to a slider 15. A spring 16 is fixed to one side of the slider 15. A plug block 17 is fixed to one end of the spring 16.

[0038] The electric push rod 14, slider 15, spring 16 and insert block 17 work together to fix and release the airborne inertial navigation module 10. At the same time, it can simulate a certain vibration and impact environment. The longer the electric push rod 14 extends, the greater the compression of the spring 16, and the stronger the squeezing and fixing strength of the airborne inertial navigation module 10. When there is external movement, the airborne inertial navigation module 10 shakes less in the simulation cabin 6.

[0039] When the electric push rod 14 retracts, the less the spring 16 is compressed, the greater the swaying amplitude of the airborne inertial navigation module 10 in the simulation cabin 6 when there is external movement. By squeezing the spring 16, the swaying amplitude of the internal airborne inertial navigation module 10 can be controlled to simulate the continuous wave undulations, motion frequency, amplitude and other parameters at sea, thereby improving the realism of the simulation.

[0040] The airborne inertial navigation module 10 has a slot for inserting the plug 17, which facilitates fixing the airborne inertial navigation module 10.

[0041] Multiple fixing cylinders 12 are provided to increase the connection strength.

[0042] The simulation cabin 6 is equipped with a fan 13, the air outlet of which faces the airborne inertial navigation module 10 to simulate airflow in the airborne environment.

[0043] An electric heating tube 8 is installed below the airborne inertial navigation module 10. The electric heating tube 8 is fixed inside the simulation cabin 6 to simulate temperature changes.

[0044] The simulator 6 has a top cover 9 threaded on its top, which can be easily opened and closed to facilitate the installation and removal of the airborne inertial navigation module 10.

[0045] An exhaust port 11 is provided on the outside of the simulation cabin 6. The exhaust port 11 is connected to the interior of the simulation cabin 6. An electromagnetic valve is installed inside the exhaust port 11. The exhaust port 11 and the electromagnetic valve are used to control the air pressure changes inside the simulation cabin 6 to simulate air pressure fluctuations in the airborne environment.

[0046] It also includes a data acquisition and processing module and a control module. The data acquisition and processing module is used to acquire the navigation data output by the airborne inertial navigation system and compare and analyze it with the input parameters of the six-axis wave simulator. Through comparison and analysis, the navigation accuracy, stability and reliability of the airborne inertial navigation system under different sea conditions can be evaluated.

[0047] The control module is used to control the motion mode and parameter settings of the six-axis wave simulator. It can set the parameters of the six-axis wave simulator and the extension and retraction of the electric push rod 14 according to the test requirements. At the same time, the control module can also work in conjunction with the data acquisition and processing module to adjust the motion parameters of the simulator based on the real-time acquired data to achieve more accurate testing.

Claims

1. A test and verification platform for an airborne inertial navigation system based on ship motion simulation, characterized in that: include: Six-axis wave simulator; Simulation cabin (6), which is mounted on a six-axis wave simulator; The simulation cabin (6) is flexibly equipped with an airborne inertial navigation module (10); The simulation chamber (6) is fixed with a fixed cylinder (12) inside. An electric push rod (14) is fixed inside the fixed cylinder (12). One end of the electric push rod (14) is connected to a slider (15). A spring (16) is fixed on one side of the slider (15). A plug (17) is fixed on one end of the spring (16). The airborne inertial navigation module (10) has a slot for inserting the plug (17); Multiple fixed cylinders (12) are provided.

2. The test and verification platform for an airborne inertial navigation system based on ship motion simulation as described in claim 1, characterized in that: The six-axis wave simulator includes a base (1) and a fixed base (3), and six electric cylinders (2) are movably installed between the base (1) and the fixed base (3); The fixed base (3) has a fixed groove (4), and an electromagnet (5) is arranged in the inner circle of the fixed groove (4). The simulation cabin (6) has a magnetic block (7) that corresponds to the magnetic attraction of the electromagnet (5).

3. The test and verification platform for an airborne inertial navigation system based on ship motion simulation according to claim 1, characterized in that: The simulation cabin (6) is equipped with a fan (13), the air outlet of which faces the airborne inertial navigation module (10).

4. The test and verification platform for an airborne inertial navigation system based on ship motion simulation according to claim 1, characterized in that: An electric heating tube (8) is provided below the airborne inertial navigation module (10), and the electric heating tube (8) is fixed inside the simulation cabin (6).

5. The test and verification platform for an airborne inertial navigation system based on ship motion simulation according to claim 1, characterized in that: The simulation chamber (6) is threaded with a top cover (9) at its top.

6. The test and verification platform for an airborne inertial navigation system based on ship motion simulation according to claim 1, characterized in that: An exhaust port (11) is provided on the outside of the simulation chamber (6), and the exhaust port (11) is connected to the interior of the simulation chamber (6). An electromagnetic valve is provided inside the exhaust port (11).

7. The test and verification platform for an airborne inertial navigation system based on ship motion simulation according to claim 1, characterized in that: It also includes a data acquisition and processing module and a control module. The data acquisition and processing module is used to acquire navigation data output by the airborne inertial navigation system and compare and analyze it with the input parameters of the six-axis wave simulator. The control module is used to control the motion mode and parameter settings of the six-axis wave simulator.

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