High-precision air floatation vertical adjusting mechanism based on differential measurement

Abstract

The invention provides a high-precision air floatation vertical adjusting mechanism based on differential measurement, and belongs to the field of ground full physical simulation. The high-precision air floatation vertical adjusting mechanism aims at solving the problems that when the pressure of a measuring air cavity of a vertical motion mechanism is measured, due to the fact that the measuring range of a pressure sensor is too large, precision becomes worse, and the degree of nonlinearity and deviation are correspondingly increased. The high-precision air floatation vertical adjusting mechanism is composed of a vertical motion mechanism, a reference pressure air cavity, an absolute pressure sensor and a relative pressure sensor. The reference pressure cavity is formed beside the vertical motion mechanism, the absolute pressure sensor is arranged in the reference pressure cavity, the vertical motion mechanism is composed of a vertical air floatation bearing outer sleeve and a vertical air floatation bearing inner sleeve, a vertical air cavity is formed between the vertical air floatation bearing outer sleeve and the vertical air floatation bearing inner sleeve, and the relative pressure sensor is arranged between the vertical air cavity and the reference pressure cavity. The absolute pressure of the vertical motion mechanism is measured in the mode that the absolute pressure and the relative pressure of the reference pressure cavity are superimposed, high measuring precision is achieved, and the good experiment effect can be achieved.

Description

technical field [0001] The invention belongs to the field of full physical simulation on the ground, and relates to a high-precision air-floating vertical adjustment mechanism based on differential measurement. Background technique [0002] The aircraft must undergo certain tests and experiments before it can be used. Therefore, it is necessary to design and develop a method that can simulate the flight status of satellites in space on the ground. This method must most realistically preview the performance of various actions of satellites in space. , In addition, various modifications can be easily made to verify whether it has dynamic characteristics that meet performance requirements. For the attitude control system, one of the special requirements for space vehicle testing is to require the external moment to be close to zero, and at the same time to accurately reproduce the six-degree-of-freedom motion of satellites and other equipment. The working principle of the air ...

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Problems solved by technology

[0008] In order to solve the problems of poor accuracy, non-linearity and corresponding increase of deviation caused by too large range of the pressure sensor when the vertical motion mechanism is used to measure the air cavity pressure, the present invention proposes a high-precision sensor based on differential measurement. Air float vertical adjustment mechanism

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