Rocket-assisted unmanned aerial vehicle launching process multi-field coupling simulation analysis method

A launch process, simulation analysis technology, applied in design optimization/simulation, instrumentation, electrical digital data processing, etc. Mold accuracy, shortened development cycle, and high computational efficiency

Active Publication Date: 2020-04-10
NO 60 RES INST OF GENERAL STAFF DEPT PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the launch safety of the rocket-assisted UAV, the flight control system usually intervenes during the launch phase of the UAV to actively control the attitude of the launch end of the aircraft; it can be seen that the launch process of the rocket-assisted UAV involves When it comes to system structure design-aerody

Method used

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  • Rocket-assisted unmanned aerial vehicle launching process multi-field coupling simulation analysis method
  • Rocket-assisted unmanned aerial vehicle launching process multi-field coupling simulation analysis method
  • Rocket-assisted unmanned aerial vehicle launching process multi-field coupling simulation analysis method

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Embodiment 1

[0089] A rocket-assisted unmanned aerial vehicle launch process multi-field coupling simulation analysis method, the specific method is as follows: set up a three-dimensional model comprising unmanned aerial vehicle, launcher, booster, and import it into the multi-body dynamics software ADAMS, for each Components are assigned mass attributes; corresponding constraint relationships are created according to the interaction relationship between components, including contact constraint pairs, fixed pairs, rotating pairs, and cylindrical pairs; booster thrust loads are applied to the model through the Spline function and AKISPL interpolation method and blocking force load; in order to eliminate the initial interference of gaps between components and contact constraints, in the dynamic model, the thrust of the booster and the thrust of the turbojet engine are applied with a delay of 0.5s, that is, the launch start time is delayed by 0.5 from the calculation start time s; using the st...

Embodiment 2

[0093] A rocket-assisted unmanned aerial vehicle launch process multi-field coupling simulation analysis method, the method comprises the following steps:

[0094] (1) Establish a three-dimensional model of the launch system;

[0095] (2) Establish a launch system dynamics model;

[0096] (3) Establish aerodynamic (moment) calculation model;

[0097] (4) Establish the flight control system model.

[0098] The establishment of a three-dimensional model of the launch system: rationally simplify the unmanned aerial vehicle, launcher, and rocket booster in the launch system, and then assemble it according to the launch requirements, and export the assembled three-dimensional model of the launch system as a Parasolid.x_t format file .

[0099] The establishment of the launch system dynamics model: import the exported three-dimensional model Parasolid.x_t format file into the multi-body dynamics software ADAMS; each part of the launcher is assigned a quality attribute according t...

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Abstract

The invention provides a rocket-assisted unmanned aerial vehicle launching process multi-field coupling simulation analysis method. The method comprises the following steps: (1) dividing the rocket-boosted unmanned aerial vehicle launching process into five stages of fixing the unmanned aerial vehicle on the frame, sliding the unmanned aerial vehicle along the frame, completely separating the unmanned aerial vehicle from the launching frame until the booster finishes working, finishing the work of the booster until the booster is completely separated, and continuously flying the unmanned aerial vehicle; (2) establishing a six-degree-of-freedom kinetic equation set of the unmanned aerial vehicle, and on the basis, establishing a multi-rigid-body kinetic model of the unmanned aerial vehiclelaunching system in ADAMS software; (3) based on the aerodynamic blowing data, establishing an aerodynamic force calculation model capable of calculating aerodynamic force and an aerodynamic moment calculation model capable of calculating aerodynamic moment under different flight attitudes in real time; (4) establishing a flight control system model in the launching process of the unmanned aerialvehicle; and (5) building an unmanned aerial vehicle launching section multi-field coupling joint simulation data interaction platform.

Description

technical field [0001] The invention relates to a multi-field coupling simulation analysis method for a rocket-assisted unmanned aerial vehicle launch process, belonging to the field of rocket-assisted unmanned aerial vehicle launch simulation analysis. Background technique [0002] UAVs use rocket-assisted launch methods, which have the advantages of convenience, speed, low requirements for launch sites, and are suitable for field environments, and have been widely used; however, the launch safety of UAVs that use rocket-assisted launch methods is limited. There are many influencing factors, including: launcher interference, booster suspension deviation, booster thrust temperature characteristic interference, booster installation and separation before and after the impact on the center of mass of the assembly, turbojet engine thrust on the aircraft attitude, Interference before and after the release of the locking force, etc. [0003] In order to improve the launch safety ...

Claims

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Application Information

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IPC IPC(8): G06F30/15G06F30/28G06F119/14
CPCY02T90/00
Inventor 陈刚洪剑锋毛师彬姚琳王晓东
Owner NO 60 RES INST OF GENERAL STAFF DEPT PLA
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