阅读说明：本技术 一种台面水平度伺服调整装置及调平方法 (Table-board levelness servo adjusting device and leveling method ) 是由 杜晨 陈勉 徐在峰 刘沫 钟秉健 于 2021-10-12 设计创作，主要内容包括：本发明公开了一种台面水平度伺服调整装置,包括：气浮球轴承测试台,所述气浮球轴承测试台由相配合的球轴承凸球台体和球轴承凹球底座组合而成；用于获得球轴承凸球台体下表面和球轴承凹球底座上表面的距离值的激光位移传感器。本申请中,在球轴承凸球台体和球轴承凹球底座之间通入纯净的压缩空气,可减小球轴承凸球台体和球轴承凹球底座之间的摩擦力,球轴承凸球台体上表面的水平度变化可十分敏感的表现出来,在激光位移传感器、倾角传感器和调整执行机构的作用下,可及时地对球轴承凸球台体的上表面进行水平度调整,提高了质心测试台面的水平度调节的精度和效率,保证了航天器质心测试的精度。(The invention discloses a table top levelness servo adjusting device, which comprises: the air-float ball bearing test bench is formed by combining a ball bearing convex ball bench body and a ball bearing concave ball base which are matched with each other; and the laser displacement sensor is used for obtaining the distance value between the lower surface of the ball bearing convex ball table body and the upper surface of the ball bearing concave ball base. In this application, let in pure compressed air between ball bearing convex ball platform body and ball bearing concave ball base, can reduce the frictional force between ball bearing convex ball platform body and the ball bearing concave ball base, the levelness change of ball bearing convex ball platform body upper surface can very sensitive expression come out, at laser displacement sensor, inclination sensor and adjustment actuating mechanism's effect down, can in time carry out the levelness adjustment to the upper surface of ball bearing convex ball platform body, the precision and the efficiency of the levelness regulation of barycenter test table face have been improved, the precision of spacecraft barycenter test has been guaranteed.)

1. A table top levelness servo adjusting device is characterized by comprising:

the test bed for the air-float ball bearing is formed by combining a ball bearing convex ball platform body (1) and a ball bearing concave ball base (2) which are matched with each other;

the laser displacement sensor (3) is used for obtaining a distance value between the lower surface of the ball bearing convex ball table body (1) and the upper surface of the ball bearing concave ball base (2), and the laser displacement sensor (3) is installed on the ball bearing concave ball base (2);

the inclination angle sensor (4), the inclination angle sensor (4) is detachably arranged on the ball bearing convex ball table body (1);

and the adjusting actuating mechanism (5) is arranged on the ball bearing concave ball base (2).

2. The servo adjusting device for the levelness of the table top according to claim 1, wherein the laser displacement sensors (3) are provided with four laser displacement sensors, and the four laser displacement sensors (3) are uniformly arranged on the same reference circle with the radius of R.

3. A servo adjustment device for the levelness of table tops according to claim 2, characterized in that there are two sets of said adjustment actuators (5), and that said two adjustment actuators (5) are distributed on the same reference circle at 90 °.

4. The method of claim 1, comprising the steps of:

a. reducing the friction force between the ball bearing convex ball table body (1) and the ball bearing concave ball base (2), taking down all articles on the upper surface of the ball bearing convex ball table body (1), installing a tilt angle sensor (4), and reading the levelness of the current table top;

b. according to the levelness of the current table surface, the levelness of the upper surface of the ball bearing convex ball table body (1) is adjusted through two sets of adjusting executing mechanisms (5);

c. reading and recording the readings of four laser displacement sensors (3) as follows: t is₁、T₂、T₃、T₄；

d. Detaching the tilt angle sensor (4) on the table top and installing a measured piece;

e. reading of four laser displacement sensors (3) is read and recorded again, and the reading is recorded as: t'₁、T'₂、T'₃、T'₄；

f. Calculating levelness according to a formula;

g. and according to the calculated levelness, the levelness of the upper surface of the ball bearing convex ball table body (1) is adjusted through two sets of adjusting executing mechanisms (5).

5. The leveling method of the table-board levelness servo according to claim 4, wherein the specific way of reducing the friction force between the ball bearing convex ball table body (1) and the ball bearing concave ball base (2) in the step a is to introduce pure compressed air between the ball bearing convex ball table body (1) and the ball bearing concave ball base (2).

6. The method of claim 5, wherein the formula involved in step f is:

Technical Field

The invention relates to the technical field of leveling of test benches, in particular to a table top levelness servo adjusting device and a leveling method.

Background

At present, when a spacecraft mass center is tested, a moment balance test principle is adopted, and the spacecraft usually has eccentric moment, so that a mass center test board can be inclined, and the mass center measurement error is increased.

In order to ensure that the height of the mass center of the spacecraft does not influence the measurement of the mass center on the horizontal plane. Therefore, it is required that the test bench has good levelness and has the function of real-time measurement and adjustment. The leveling mode in the prior art is limited by the volume, dead weight, mounting size of the table top and other conditions of the measured object, and real-time measurement and adjustment of the levelness of the table top cannot be carried out.

The invention discloses a table top levelness servo adjusting device and a leveling method according to the requirement of a spacecraft on the aspect of mass center test.

Disclosure of Invention

The invention aims to: in order to solve the above problems, a table top levelness servo adjusting device and a leveling method are provided.

In order to achieve the purpose, the invention adopts the following technical scheme:

a table top levelness servo-adjusting device, comprising:

the air-float ball bearing test bench is formed by combining a ball bearing convex ball bench body and a ball bearing concave ball base which are matched with each other;

the laser displacement sensor is used for obtaining the distance value between the lower surface of the ball bearing convex ball table body and the upper surface of the ball bearing concave ball base, and is arranged on the ball bearing concave ball base;

the inclination angle sensor is detachably arranged on the ball bearing convex spherical table body;

and the adjusting and executing mechanism is arranged on the ball bearing concave ball base.

Preferably, the laser displacement sensors are provided with four laser displacement sensors, the four laser displacement sensors are uniformly arranged on the same reference circle, and the radius of the reference circle is R.

Preferably, the adjusting and executing mechanisms are provided with two sets, and the two adjusting and executing mechanisms form a 90-degree distribution on the same reference circle.

A leveling method for a horizontal servo of a table top comprises the following steps:

a. reducing the friction force between the ball bearing convex ball table body and the ball bearing concave ball base, taking down all articles on the upper surface of the ball bearing convex ball table body, installing an inclination angle sensor, and reading the levelness of the current table top;

b. according to the levelness of the current table surface, the levelness of the upper surface of the ball bearing convex ball table body is adjusted through two sets of adjusting executing mechanisms;

c. reading and recording the readings of the four laser displacement sensors, and recording as follows: t is₁、T₂、T₃、T₄；

d. Detaching the tilt angle sensor on the table top and installing the tested piece;

e. reading and recording the readings of the four laser displacement sensors again, and recording as follows: t'₁、T'₂、T'₃、T'₄；

f. Calculating levelness according to a formula;

g. and according to the calculated levelness, the levelness of the upper surface of the ball bearing convex ball table body is adjusted through two sets of adjusting executing mechanisms.

Preferably, the specific way of reducing the friction force between the ball bearing convex ball table body and the ball bearing concave ball base in the step a is to introduce pure compressed air between the ball bearing convex ball table body and the ball bearing concave ball base.

Preferably, the formula involved in the step f is:

in summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

in this application, let in pure compressed air between ball bearing convex ball platform body and ball bearing concave ball base, can reduce the frictional force between ball bearing convex ball platform body and the ball bearing concave ball base, the levelness change of ball bearing convex ball platform body upper surface can very sensitive expression come out, at laser displacement sensor, inclination sensor and adjustment actuating mechanism's effect down, can in time carry out the levelness adjustment to the upper surface of ball bearing convex ball platform body, the precision and the efficiency of the levelness regulation of barycenter test table face have been improved, the precision of spacecraft barycenter test has been guaranteed.

Drawings

FIG. 1 is a schematic structural diagram of a leveling device provided according to an embodiment of the invention;

fig. 2 is a schematic diagram illustrating a cross-sectional structure a-a in fig. 1 according to an embodiment of the present invention.

Illustration of the drawings:

1. a ball bearing convex ball table body; 2. a ball bearing concave ball base; 3. a laser displacement sensor; 4. a tilt sensor; 5. and adjusting the actuating mechanism.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution:

a table top levelness servo-adjusting device, comprising: the test bed of the air ball bearing, the air ball bearing test bed is formed by ball bearing convex ball table body 1 and ball bearing concave ball base 2 of precise fit;

the laser displacement sensor 3 is used for obtaining the distance value between the lower surface of the ball bearing convex spherical table body 1 and the upper surface of the ball bearing concave spherical base 2, the laser displacement sensor 3 is arranged on the ball bearing concave spherical base 2, the laser displacement sensor 3 is provided with four laser displacement sensors, the four laser displacement sensors 3 are uniformly arranged on the same reference circle, the radius of the reference circle is R, the center of the reference circle is coaxial with the center of the upper surface of the ball bearing convex spherical table body 1, and the laser beam emitted by the laser displacement sensor 3 can irradiate the lower surface of the ball bearing convex spherical table body 1;

the inclination angle sensor 4 is detachably arranged on the ball bearing convex spherical table body 1;

the adjusting and executing mechanisms 5 are arranged on the ball bearing concave ball base 2, the adjusting and executing mechanisms 5 are provided with two sets, the two adjusting and executing mechanisms 5 are distributed on the same reference circle in a 90-degree mode, and the circle center of the reference circle is coaxial with the circle center of the upper surface of the ball bearing convex ball table body 1.

Specifically, as shown in fig. 1 and 2, a leveling method for a table-board levelness servo comprises the following steps:

a. reducing the friction force between the ball bearing convex ball table body 1 and the ball bearing concave ball base 2, taking down all articles on the upper surface of the ball bearing convex ball table body 1, installing an inclination angle sensor 4, reading the levelness of the current table surface, wherein the specific mode of reducing the friction force between the ball bearing convex ball table body 1 and the ball bearing concave ball base 2 in the step a is that pure compressed air is introduced between the ball bearing convex ball table body 1 and the ball bearing concave ball base 2, and a high-pressure air film is formed between the ball bearing convex ball table body 1 and the ball bearing concave ball base 2, wherein the air film can bear the weight of the spacecraft and can form gas lubrication, and the change of the levelness of the upper surface of the ball bearing convex ball table body 1 can be expressed very sensitively;

b. according to the levelness of the current table surface, the levelness of the upper surface of the ball bearing convex ball table body 1 is adjusted through two sets of adjusting executing mechanisms 5;

c. reading and recording the readings of the four laser displacement sensors 3, and recording as follows: t is₁、T₂、T₃、T₄Wherein, T₁And T₃Indicating the levelness, T, in the X direction₂And T₄Indicating the levelness in the Y direction;

d. dismantling the tilt angle sensor 4 on the table top and installing the tested piece;

e. reading and recording four laser bits againThe reading of the displacement sensor 3 is recorded as: t'₁、T'₂、T'₃、T'₄；

f. Calculating levelness according to a formula, wherein the formula involved in the step f is as follows:

g. and according to the calculated levelness, the levelness of the upper surface of the ball bearing convex ball table body 1 is adjusted through two sets of adjusting executing mechanisms 5.

The previous description of the embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.