Spacecraft sealed cabin in-orbit pressure difference environment cabin equipment precision compensation method

Abstract

The invention discloses a spacecraft sealed cabin in-orbit pressure difference environment cabin equipment precision compensation device which comprises a sealed cabin body and a sealed cabin blanking cap, a special perspective device is fixedly connected to the transverse outer side face of the sealed cabin blanking cap, and in-cabin equipment A is fixedly connected to the transverse inner side face of the sealed cabin blanking cap. A precise measurement light path of the in-cabin equipment A passes through the special perspective device and is parallel to the axis of the special perspective device, one longitudinal side surface of the sealed cabin body is fixedly connected with out-cabin equipment B, and a theodolite T1, a theodolite T2, a theodolite T3 and a theodolite T4 are respectively erected outside the sealed cabin body. According to the method, the measured value of the in-cabin equipment A at normal pressure is compensated and corrected according to the change of the attitude angle, and an operator is commanded to adjust the mounting precision of the equipment A through the corrected value, so that the guarantee of the in-orbit precision of the equipment in the sealed cabin is met, the method is a key technical breakthrough of the existing accurate measurement on-orbit precision compensation, the operation is simple, and the operation is convenient.

Description

technical field [0001] The invention relates to the technical field of mechanical structure precision measurement, in particular to a method for compensating equipment precision in a space vehicle airtight cabin in an orbital pressure difference environment cabin. Background technique [0002] When a long-lived spacecraft such as a space station stays in orbit for a long time, the key control equipment A is arranged in the airtight cabin, while other control sensors are arranged outside the cabin, because there is a pressure of 1 atmosphere inside and outside the cabin when the airtight cabin is in orbit. In a poor environment, in order to ensure that the spacecraft control subsystem can more accurately grasp the relationship between the on-orbit attitude of the in-cabin equipment A and the out-of-vehicle sensor, it is necessary to inject the data relationship on the ground in advance before launch, and the spacecraft’s ground environment and on-orbit environment There are d...

AI Technical Summary

Problems solved by technology

[0002] When a long-lived spacecraft such as a space station stays in orbit for a long time, the key control equipment A is arranged in the airtight cabin, while other control sensors are arranged outside the cabin, because there is a pressure of 1 atmosphere inside and outside the cabin when the airtight cabin is in orbit. In a poor environment, in order to ensure that the spacecraft control subsystem can more accurately grasp the relationship between the on-orbit attitude of the in-cabin equipment A and the out-of-vehicle sensor, it is necessary to inject the data relationship on the ground in advance before launch, and the spacecraft’s ground environment and on-orbit environment There are differences. For example, there is an atmospheric pressure difference between the airtight cabin and the orbital cabin. Based on the above situation, when measuring the accuracy of equipment installation on the ground, it is necessary to simulate the working condition of the pressure difference of the spacecraft in orbit, and fill the airtight container cabin with 2 atmospheres. , forming a state where the internal and external pressure difference is similar to the on-orbit pressure difference environment for measurement, which brings about the problem that operators and measurement equipment cannot enter the airtight and pressure-maintained cabin for operation

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