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Real-time high-precision acquiring method for conical surface pneumatic pressure field

An acquisition method and high-precision technology, which is applied in aerodynamic tests, measuring devices, instruments, etc., can solve the problems of difficult high-precision measurement of aerodynamic pressure field, and achieve the effect of high accuracy

Active Publication Date: 2016-06-01
BEIJING LINJIN SPACE AIRCRAFT SYST ENG INST +1
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Problems solved by technology

[0006] The purpose of the present invention is to provide a real-time high-precision acquisition method of the aerodynamic pressure field of the conical surface, which can solve the problem of high-precision measurement of the aerodynamic pressure field of the embedded atmospheric measurement technology

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  • Real-time high-precision acquiring method for conical surface pneumatic pressure field
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  • Real-time high-precision acquiring method for conical surface pneumatic pressure field

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] like Figure 1~3 As shown, a real-time high-precision acquisition method of the aerodynamic pressure field of a conical surface, the method specifically includes the following steps:

[0032] Step 1. Establish high-precision nose cone surface and pressure measurement hole structure model and pressure measurement model;

[0033] established as figure 1 , figure 2 The high-precision nose cone profile and pressure measurement hole structure model and pressure measurement model shown specifically include:

[0034] The pressure measuring holes are located on the cone tip and the quadrant of the cone surface, among which, the 8 pressure measuring holes on the cone surface are distributed strictly symmetrically with respect to the axis, and the circumferential position deviation is less than 10';

[0035] The distance L between t...

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Abstract

The invention relates to the technical field of pneumatic pressure field high-precision measurement, and particularly discloses a real-time high-precision acquiring method for a conical surface pneumatic pressure field. The real-time high-precision acquiring method comprises the steps of 1, establishing a high-precision nose cone section surface and a pressure measuring hole structure model and a pressure measuring model; 2, acquiring surface pressure field data of aircrafts with different heights, different Mach numbers, different angles-of-attack and different sideslip angle states; 3, acquiring high-precision pressure data of a 1:1 nose cone section surface and the pressure measuring hole through air blowing in wind tunnel testing; 4, performing conversion on the surface pressure field data of the aircraft and the high-precision pressure measuring data in air blowing in wind tunnel testing for obtaining a different-state high-precision reference pressure database; and 5, performing difference comparison on a real-time measured pressure and a reference pressure database, eliminating abnormal pressures, thereby supplying reliable high-precision pressure distribution data for solving atmospheric parameters. The method settles a problem of high-precision measurement for the pneumatic pressure field. In a range in which flight height is 0-20km, the Mach number is 2-4Ma, and the angle-of-attack is -12-+12 DEG, high data acquisition precision of the pressure field is realized, and pressure deviation is smaller than + / -300 Pa.

Description

technical field [0001] The invention belongs to the technical field of high-precision measurement of aerodynamic pressure field, and in particular relates to a real-time high-precision acquisition method of aerodynamic pressure field of a conical surface. Background technique [0002] The embedded air data measurement device (FlushAirDataSystem, referred to as "FADS") directly measures the surface pressure of the aircraft to solve the flight Mach number, angle of attack, sideslip angle, air pressure and other atmospheric parameters. Characteristics of flight conditions. [0003] Traditional measurement technology generally realizes the measurement of the above data through the combination of protruding pitot and angle sensor. The development of probe measurement technology is relatively mature, but with the development of aerospace technology, the limitations of its technical solutions become more and more obvious. For example, when the aircraft is flying at a high Mach nu...

Claims

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Application Information

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IPC IPC(8): G01M9/00
Inventor 杨缙谢坤苏丙未李留刚郭巍谢雪明张银辉廖沫刘建勇白金泽陈新民
Owner BEIJING LINJIN SPACE AIRCRAFT SYST ENG INST
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