Vacuum plume aerodynamic force measuring system and method

A vacuum and power technology, applied in the vacuum plume aerodynamic measurement system and measurement field, can solve the problem of no large-scale vacuum plume effect experimental system, and achieve the effect of avoiding errors and accurate measurement

Inactive Publication Date: 2014-03-05
BEIHANG UNIV
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Problems solved by technology

At present, there is no aerodynamic measurement system specificall

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  • Vacuum plume aerodynamic force measuring system and method

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[0032] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0033] The invention is a vacuum plume aerodynamic measurement system and measurement method.

[0034] The vacuum plume aerodynamic measurement system of the present invention is such as figure 1 As shown, it includes a vacuum chamber 1, an engine 2, a force measurement model 3, a plume protection cover 4, a displacement mechanism 5, a mounting base 501, and a six-component balance force measurement system 600.

[0035] The six-component balance force measurement system 600 includes a six-component balance 601, an in-cabin power supply cable 602, a power supply cable penetrating flange 603, an external power supply cable 604, a DC stabilized power supply 605, and an in-cabin signal cable 606, a signal conversion module 607, an in-cabin signal cable 608, a signal cable penetration flange 609, an out-of-cabin signal cable 610, and a data acquisition system 611.

[00...

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Abstract

The invention discloses a vacuum plume aerodynamic force measuring system and method. The vacuum plume aerodynamic force measuring system comprises a vacuum chamber, an engine, a force measuring model, a plume protection cover, a displacement mechanism, a mounting base and a six-component balance force measuring system. According to the vacuum plume aerodynamic force measuring system and method, a small-range six-component balance is used as a force measuring element for directly measuring vacuum plume aerodynamic force, so that a measurement result is more accurate; according to the characteristics of high speed and high temperature of engine vacuum plumes, duralumin is used as a material for designing the force measuring model and the plume protection cover, so that the force measuring model and the six-component balance are prevented from being damaged; the displacement mechanism is used for driving the six-component balance and the force measuring model to scan a plume field, and aerodynamic force measurement can be conducted at multiple positions under multiple working conditions in one close-cabin experiment. The vacuum plume aerodynamic force measuring method comprises the following steps that the six-component balance is calibrated, a six-component balance working formula is calculated, experimental equipment is installed, the experiment is conducted, and data are processed.

Description

technical field [0001] The invention relates to an aerodynamic measurement system and a measurement method, in particular to a measurement system and a measurement method for measuring vacuum plume aerodynamics under vacuum conditions. Background technique [0002] Attitude and orbit control engines are widely used on spacecraft such as satellites, spaceships, and space stations. When these engines work in a high-vacuum environment, their jets will expand freely to the external environment to form a vacuum plume. In many cases, the vacuum plume will hit the surface of the spacecraft, generating additional disturbance force and disturbance moment, which will adversely affect the normal operation of the spacecraft. This disturbance force and disturbance moment are collectively referred to as the vacuum plume aerodynamic force. The adverse effects brought by the vacuum plume aerodynamic force usually require other engines to do work to correct it, and the propellant that the sp...

Claims

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Application Information

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IPC IPC(8): G01M9/00G01M9/06
Inventor 翁惠焱吴靖凌桂龙蔡国飙王文龙
Owner BEIHANG UNIV
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