EP-4741293-A1 - MICRO-LOW GRAVITY SIMULATION TEST APPARATUS AND TEST METHOD

EP4741293A1EP 4741293 A1EP4741293 A1EP 4741293A1EP-4741293-A1

Abstract

The present disclosure relates to the technical field of environmental tests and discloses a micro-low gravity simulation test apparatus and a test method. The apparatus includes a first frame (100), a first speed sensor, and a second speed sensor. A second frame (200) that is driven by a first drive assembly to rotate around a first direction is arranged in the first frame. A clamping member (300) that is driven by a second drive assembly to rotate around a second direction and is configured to fix a test sample is arranged in the second frame (200). The first speed sensor is configured to detect a speed of rotation of the second frame (200) around the first direction to obtain a first speed, transmit the first speed to a control system, and correct an operating power of the first drive assembly. The second speed sensor is configured to detect a speed of rotation of the clamping member (300) around the second direction to obtain a second speed, transmit the second speed to the control system, and correct an operating power of the second drive assembly. The present disclosure can ensure that a sample of an inorganic non-metallic material is accurately maintained in a required micro-low gravity environment for testing.

Inventors

ZHI, Xiao
WU, HAO
LIU, Yaojun
MA, ZHONGCHENG
Gao, Chunyong
LIU, YUN
GUO, JUNHUA

Assignees

China Building Materials Academy Co., Ltd.
China National Building Material Group Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20250327

Claims (10)

A micro-low gravity simulation test apparatus, applied in a vacuum tank, and comprising: a first frame (100), configured to be arranged on a workbench in the vacuum tank; a second frame (200), rotatably connected in the first frame (100), and driven by a first drive assembly to rotate around a first direction; a clamping member (300), configured to clamp and fix a test sample, wherein the clamping member (300) is rotatably connected in the second frame (200), and is driven by a second drive assembly to rotate around a second direction, and the second direction and the first direction are perpendicular to each other and are located in the same horizontal plane; a first speed sensor, configured to detect a speed of rotation of the second frame (200) around the first direction to obtain a first speed, and transmit the first speed to a control system; wherein the control system is configured to compare the first speed with a first standard rotation speed to obtain a first offset value, correct an operating power of the first drive assembly according to the first offset value, and control the first drive assembly to rotate according to the corrected operating power of the first drive assembly; and a second speed sensor, configured to detect a speed of rotation of the clamping member (300) around the second direction to obtain a second speed, and transmit the second speed to the control system; wherein the control system is configured to compare the second speed with a second standard rotation speed to obtain a second offset value, correct an operating power of the second drive assembly according to the second offset value, and control the second drive assembly to rotate according to the corrected operating power of the second drive assembly.
The micro-low gravity simulation test apparatus according to claim 1, further comprising a force sensor, wherein the force sensor is configured to detect a first gravity value to which the test sample is subjected and transmit the first gravity value to the control system; the control system is configured to compare the first gravity value with a standard micro-low gravity value to obtain a gravity offset value, obtain a first component compensation rotation speed around the first direction and a second component compensation rotation speed around the second direction by decomposition calculation according to the gravity offset value, correct the operating power of the first drive assembly according to the first component compensation rotation speed and control the first drive assembly to rotate according to the corrected operating power of the first drive assembly, and correct the operating power of the second drive assembly according to the second component compensation rotation speed and control the second drive assembly to rotate according to the corrected operating power of the second drive assembly.
The micro-low gravity simulation test apparatus according to claim 1 or 2, wherein the first drive assembly comprises a first motor (410) arranged on the first frame (100) and extending in a third direction, a first worm gear reducer (420) is connected to an output end of the first motor (410), an output end of the first worm gear reducer (420) is coaxially connected to the second frame (200); and every two selected from the first direction, the second direction, and the third direction are perpendicular to each other.
The micro-low gravity simulation test apparatus according to claim 3, wherein the second drive assembly comprises a second motor (510) arranged on the second frame (200) and extending along the third direction, a second worm gear reducer (520) is connected to an output end of the second motor (510), and an output end of the second worm gear reducer (520) is coaxially connected to the clamping member (300).
The micro-low gravity simulation test apparatus according to claim 4, wherein the first motor (410) and the second motor (510) are configured to be high-and-low temperature resistant motors.
The micro-low gravity simulation test apparatus according to claim 3, wherein a U-shaped groove (110) is formed in an upper end of the first frame (100) in the third direction, and the second frame (200) is rotatably connected in the U-shaped groove (110).
The micro-low gravity simulation test apparatus according to claim 6, wherein the first motor (410) is located under the first worm gear reducer (420) in the third direction.
The micro-low gravity simulation test apparatus according to claim 2, wherein the control system is provided with a display.
The micro-low gravity simulation test apparatus according to claim 1 or 2, wherein a mounting through groove (210) is formed in the second frame (200) in a penetrating manner along a thickness direction thereof, and the clamping member (300) is rotatably connected in the mounting through groove (210); and/or, the second frame (200) is rotatably connected in the first frame (100) by means of a first ceramic oil-free bearing (120); and/or, the clamping member (300) is rotatably connected in the second frame (200) by means of a second ceramic oil-free bearing.
A test method, applied by a test apparatus according to any one of claims 1 to 9, and comprising the following steps: mounting the test apparatus on a workbench in a vacuum tank, and mounting and fixing a test sample to be tested on the clamping member (300); inputting a standard micro-low gravity acceleration required for a test into a control system; driving, by a first drive assembly and a second drive assembly, the test sample made of an inorganic non-metallic material to rotate around a first direction and a second direction respectively; detecting, by a first speed sensor, a speed of rotation of the second frame (200) around the first direction to obtain a first speed, and transmitting the first speed to the control system; comparing, by the control system, the first speed with a first standard rotation speed to obtain a first offset value, and correcting an operating power of the first drive assembly according to the first offset value; and detecting, by a second speed sensor, a speed of rotation of the clamping member (300) around the second direction to obtain a second speed, and transmitting the second speed to the control system; comparing, by the control system, the second speed with a second standard rotation speed to obtain a second offset value, and correcting an operating power of the second drive assembly according to the second offset value.

Description

TECHNICAL FIELD The present disclosure relates to the technical field of environmental tests, in particular to a micro-low gravity simulation test apparatus and a test method. BACKGROUND In recent years, a space demand is growing, a space technology is developing constantly, and more and more inorganic non-metallic materials are also applied to the construction of a space base, so more stringent requirements are put forward for various performance indexes of the inorganic non-metallic materials subjected to a complex space environment. A micro-low gravity environment may significantly affect curing molding performance and structural service performance of the inorganic non-metallic materials, and conducting adequate micro-low gravity simulation tests is one of key technical links in assessing the reliability and lifetime of the inorganic non-metallic materials. It is difficult to implement a micro-low gravity test study in an actual space environment, and it is necessary to simulate an operating state of micro-low gravity in space in a gravity environment of the Earth. Most of existing micro-low gravity simulation test apparatuses adopt micro-low gravity simulation technologies such as an air flotation method, a suspension method, and a falling tower method, but the above micro-low gravity simulation technologies are difficult to conduct and implement under thermal vacuum conditions, it is not convenient to accurately simulate different micro-low gravity environments, and applicability is poor. SUMMARY OF THE INVENTION In view of this, the present disclosure provides a micro-low gravity simulation test apparatus and a test method to solve problems that existing micro-low gravity simulation test apparatuses are difficult to conduct and implement under thermal vacuum conditions, and it is not convenient to accurately simulate different micro-low gravity environments. In a first aspect, the present disclosure provides a micro-low gravity simulation test apparatus, applied in a vacuum tank, and including: a first frame, configured to be arranged on a workbench in the vacuum tank;a second frame, rotatably connected in the first frame, and driven by a first drive assembly to rotate around a first direction;a clamping member, configured to clamp and fix a test sample, wherein the clamping member is rotatably connected in the second frame, and is driven by a second drive assembly to rotate around a second direction, and the second direction and the first direction are perpendicular to each other and are located in the same horizontal plane;a first speed sensor, configured to detect a speed of rotation of the second frame around the first direction to obtain a first speed, and transmit the first speed to a control system; wherein the control system is configured to compare the first speed with a first standard rotation speed to obtain a first offset value, correct an operating power of the first drive assembly according to the first offset value, and control the first drive assembly to rotate according to the corrected operating power of the first drive assembly; anda second speed sensor, configured to detect a speed of rotation of the clamping member around the second direction to obtain a second speed, and transmit the second speed to the control system; wherein the control system is configured to compare the second speed with a second standard rotation speed to obtain a second offset value, correct an operating power of the second drive assembly according to the second offset value, and control the second drive assembly to rotate according to the corrected operating power of the second drive assembly. The micro-low gravity simulation test apparatus according to the present disclosure at least has the following beneficial effects. The first drive assembly drives the second frame to rotate in the first direction, the second drive assembly drives the clamping member to rotate around the second direction, so that the test sample rotates around the second direction while rotating around the first direction, a centrifugal force generated during a rotation movement process may offset part of gravity, and a micro-low-gravity environment is simulated by a mechanical rotation method, which meets requirements for conducting and implementing a micro-low gravity environment simulation test in the vacuum tank under thermal vacuum conditions. At the same time, the first speed of the actual rotation of the second frame is obtained by real-time detection of the first speed sensor, the first speed is compared with the first standard rotation speed to obtain the first offset value, the operating power of the first drive assembly is corrected according to the first offset value, and the first drive assembly is controlled to rotate according to the corrected operating power of the first drive assembly, thus ensuring that the second frame accurately rotates around the first direction at the first standard rotation speed. In addition,