A method for calculating the maximum sinking speed of an aircraft

A speed calculation and aircraft technology, applied in the field of fixed-wing aircraft, achieves clear physical meaning, avoids a large amount of test flight test data and complex statistical calculation process, and is easy to apply

Active Publication Date: 2018-01-30
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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Problems solved by technology

Therefore, for those who have no previous development experience or service application history of fixed-wing aircraft (especially fixed-wing aircraft used for mobile platform service), the above calculation method is obviously not suitable for applying mechanically

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  • A method for calculating the maximum sinking speed of an aircraft
  • A method for calculating the maximum sinking speed of an aircraft
  • A method for calculating the maximum sinking speed of an aircraft

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Embodiment Construction

[0019] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0020] A certain type of fixed-wing aircraft, the approach speed V pa It is 240km / h (under standard atmospheric conditions, the design weight, the output value of flight mechanics calculation, that is, 66.67m / s), the maximum basic angle of glide is set to 4°, in the bad sea conditions, according to the patent algorithm, the maximum sinking speed of the aircraft V y.max for

[0021] V y.max =(V pa -10.0) sin γ a / c.max +3.0

[0022] =(66.67-10.0) sin4°+3.0

[0023] =7m / s

[0024] where, γ a / c.max is the maximum glide basic angle set by the optical landing aid device, in this embodiment, γ a / c.max = 4°; V pa is the approach speed of the aircraft, in this embodiment, V pa =66.67m / s.

[0025] Each parameter data involved in the calculation formula of the present invention, a part is provided by the aircraft airborne fli...

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Abstract

The invention belongs to the technical field of fixed-wing aircraft, and in particular relates to a calculation method for the maximum sinking speed of the fixed-wing aircraft. It is characterized in that only two input parameters are required: the approach velocity Vpa and the maximum glide basic angle γa / c.max, which is easy to apply, clear in physical meaning and strong in applicability. Its beneficial effects are: the innovation gives the maximum sinking speed formula algorithm without the statistical sample library, and solves the problem of inputting the key original parameters of the buffer design of the fixed-wing aircraft landing gear that troubles the designer.

Description

technical field [0001] The invention belongs to the technical field of fixed-wing aircraft (specifically referring to the fixed-wing aircraft used for moving platform service), and in particular relates to a method for calculating the maximum sinking speed of the fixed-wing aircraft. Background technique [0002] The landing gear of fixed-wing aircraft (especially fixed-wing aircraft used for mobile platform service) is the most important thing in the design of the structural strength of the aircraft body, and the maximum sinking speed is the key characteristic parameter of the cushioning performance design of the landing gear. Therefore, it is of great practical significance to establish a calculation method for the maximum sinking speed of an aircraft. [0003] According to the calculation method in the existing public literature, the sinking speed of each landing type of the fixed-wing aircraft should be determined in the form of multivariate distribution. Except for sin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 隋福成姚念奎李玉海王永庆
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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