A force analysis method of flow field based on data fitting

A force analysis and data fitting technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of unsuitability for wide application, interference, and high cost

Inactive Publication Date: 2019-01-18
BEIHANG UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

The flow field interferes significantly with the motion of close objects, causing some tasks to fail
For example, during the aerial refueling process of the hose, the flow field generated by the head of the oil receiver will repel the drogue sleeve at the end of the hose, and the drogue sleeve will be pushed away from the original equilibrium position at a faster speed after being disturbed, and finally lead to difficulty in docking
At present, the aviation field often uses the wind tunnel test method to study the force of the aircraft in the air flow field, but this test method is extremely expensive and not suitable for wide application
With the development of computational fluid dynamics, some simulation software can quickly and portablely calculate the force of objects in the flow field, but this method cannot obtain the analytical form of force, which has certain limitations

Method used

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  • A force analysis method of flow field based on data fitting
  • A force analysis method of flow field based on data fitting
  • A force analysis method of flow field based on data fitting

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Embodiment Construction

[0059] The invention provides a flow field force analysis method based on data fitting. Taking the study of the head wave effect of the oil receiver during aerial refueling as an example, the specific implementation of the present invention will be further described. During the docking process of hose-type aerial refueling, when the drogue sleeve is very close to the oil receiver, the airflow near the head of the oil receiver will generate a strong aerodynamic disturbance on the drogue sleeve, pushing the drogue sleeve away from the cone tube, which This phenomenon is called head wave effect. The head wave effect is essentially due to the change of the airflow after passing through the head of the oil receiver. The drogue sleeve is in the changed flow field and is subjected to a repulsive force similar to that produced by the head. Therefore, it is very important to analyze the force of the head wave effect on the drogue sleeve, which plays a key role in the docking control. ...

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Abstract

The invention relates to a flow field stress analysis method based on data fitting, comprising the following steps: step 1: establishing a CFD simulation environment, step 2, collecting CFD data; step3, infering the function form of the force model of the flow field; step 4, estimating the parameters of the model; step 5: validating the model parameters. The invention solves the problem that theforce analysis of the changing flow field generated by the complex shape object is difficult, and the obtained force model is in the form of an analytical solution, and can be used for characteristicanalysis and controller design, etc.

Description

technical field [0001] The invention relates to a flow field force analysis method based on data fitting, which belongs to the field of flow field calculation. Background technique [0002] With the wide application of aviation vehicles and underwater vehicles in military and civil fields, it is a practical and important research topic to study the force of objects in the flow field. Water and air are the two most common fluids. Whether in the air or in the water, when the aircraft moves at a certain speed, it will have an effect on the movement of the surrounding fluid, thereby generating a changing flow field. This flow field interferes significantly with the motion of close objects, causing some tasks to fail. For example, during the aerial refueling process of the hose, the flow field generated by the head of the oil receiver will repel the drogue sleeve at the end of the hose, and the drogue sleeve will be pushed away from the original equilibrium position at a faster ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20
Inventor 全权戴训华马海彪蔡开元
Owner BEIHANG UNIV
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