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Airplane real-time gravity center position estimation method

A technology of center of gravity position and aircraft, which is applied in the field of real-time center of gravity position estimation of aircraft, and can solve problems such as the limitation of popularization and application.

Active Publication Date: 2021-04-20
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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Problems solved by technology

Since this method is only applicable to aircraft equipped with a horizontal stabilizer, there are limitations in its popularization and application

Method used

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] An embodiment of the present invention provides a method for estimating the real-time center of gravity position of an aircraft, such as figure 1 As shown, the method includes:

[0030] (1) According to the angle of attack α and Mach number Ma information provided by the aircraft air data system, through the interpolation table C m (α, Ma) to calculate the pitching moment coefficient component C of the fuselage wing m (α);

[0031] (2) Calculate the pitching damping moment coefficient C m (q): According to the aircraft angle of attack α, Mach number Ma, and pitch rate q, pass the interpolation table C m (α,Ma,q) is calculated and obtained;

[0032] (3) Obtain the pitch control moment coefficient: according to the angle of attack α of the aircraft, the Mach number Ma, and the deflection angle information δ of each control surface from the flight co...

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Abstract

The invention belongs to the technical field of aircraft flight control system design, and discloses an airplane real-time gravity center position estimation method to ensure that accurate gravity center position information is obtained. Based on existing airborne sensor information, the method obtains the estimated value of the real-time gravity center position through reasonable simplification and necessary protection link setting by utilizing a moment balance relationship, the realization of an active gravity center control function can be supported, and the performance of an airplane in a cruise stage is further improved.

Description

technical field [0001] The invention belongs to the technical field of aircraft flight control system design, in particular to a method for estimating the real-time center of gravity position of an aircraft. Background technique [0002] As we all know, the distance between the focal point and the center of gravity represents the static stability margin of the aircraft, which is closely related to the overall aircraft stability, maneuverability, and flight resistance. During the flight of the aircraft, the aerodynamic focus and center of gravity will change accordingly due to factors such as configuration (landing gear, high-lift device retractable), speed, attitude changes, fuel consumption, and weapon delivery. In order to achieve a reasonable match between the center of gravity and the focus position, the concept of "active center of gravity control" technology was proposed in the 1980s, that is, to actively adjust the position of the center of gravity of the aircraft by ...

Claims

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Application Information

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IPC IPC(8): G01M1/12G06F30/15G06F30/20G06F111/10G06F119/14
CPCY02T90/00
Inventor 刘世民王培郑华
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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