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Method for controlling attitude of high-altitude aircraft by utilizing jet flow

A technology of attitude control and aircraft, applied in attitude control, vehicle position/route/altitude control, non-electric variable control, etc., can solve the problem of unnecessary calculation, reduce calculation time, achieve accurate simulation results, and save calculation memory Effect

Active Publication Date: 2022-03-11
CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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Problems solved by technology

[0006] In order to solve the problem of unnecessary computation caused by uniformly densified velocity space grid, this method uses local densification in velocity space to simulate the interference effect of jet flow and hypersonic thin incoming flow. This method can efficiently obtain jet flow Amplification factor, and then control the flight attitude of the aircraft

Method used

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  • Method for controlling attitude of high-altitude aircraft by utilizing jet flow
  • Method for controlling attitude of high-altitude aircraft by utilizing jet flow

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Embodiment

[0047] Please refer to figure 1 , figure 1 It is a schematic flow chart of a method for controlling the attitude of a high-altitude aircraft using a jet flow. Embodiments of the present invention provide a method for controlling the attitude of a high-altitude aircraft using a jet flow. The method includes:

[0048] Step 1: According to the shape and size of a specific aircraft and the given flow and jet flow conditions, generate a suitable physical space grid.

[0049] Step 2: Based on the physical space grid generated in step 1 and the given flow and jet flow conditions, the NS solver is used for simulation to obtain the distribution of flow field variables such as density, velocity, pressure, and temperature around the aircraft. The specific solution method of NS solver can refer to the following documents:

[0050] Yan Chao. Computational Fluid Dynamics Method and Application[M]. Beijing: Beijing University of Aeronautics and Astronautics Press, 2006.

[0051] The NS so...

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Abstract

The invention discloses a method for controlling the attitude of a high-altitude aircraft by utilizing jet flow, and relates to the field of aircraft high-altitude attitude control, the method adopts local encryption in a speed space to simulate the interference effect of jet flow and hypersonic speed rarefied incoming flow, and by adopting the method, a jet flow amplification factor can be efficiently and accurately obtained; and the flight attitude of the aircraft can be efficiently and accurately controlled.

Description

technical field [0001] The invention relates to the field of high-altitude aircraft attitude control, in particular to a method for controlling the attitude of high-altitude aircraft by using jet flow. Background technique [0002] During the flight of winged aircraft, the attitude control is often realized by the deflection of rudder surfaces such as ailerons, vertical tails, and body flaps. However, under high-altitude conditions, the incoming flow is thin, the dynamic pressure is low, and the control efficiency of the rudder surface is insufficient. Attitude control usually requires the aid of a Jet Reaction Control System (RCS). [0003] Under vacuum conditions, the jet reaction force / moment can be directly determined from the jet conditions. As the aircraft flies in the atmosphere, there will inevitably be an interference effect between the incoming flow and the jet, which will change the distribution of variables such as pressure and friction on the surface of the ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08
CPCG05D1/0808
Inventor 江定武王沛李锦毛枚良
Owner CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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