KR102278773B1 - Lifting devices and methods for preventing deflection during the installation of Thermal vacuum chamber into the satellite - Google Patents

Abstract

The present invention relates to a lifting device and a method for preventing sagging during loading of satellites in a thermal vacuum chamber, and more particularly, to a plurality of sagging due to the weight of a satellite disposed in the lifting device or leakage of a hydraulic device of a lifting device, etc. Each actuator is controlled by a control unit, and when the lifting unit is raised and lowered, the deflection of the actuator is detected by several sensors such as a displacement sensor and compensated for this. And it relates to a lifting device and method for preventing sagging during loading of satellites in a thermal vacuum chamber that prevents sagging.

Description

Lifting devices and methods for preventing deflection during the installation of Thermal vacuum chamber into the satellite

The present invention relates to a lifting device and method for preventing sagging during loading of satellites in a thermal vacuum chamber, and more particularly, to the weight of satellites disposed in the lifting device or aging, failure, and leakage of hydraulic devices of lifting devices. It relates to a lifting device and method for preventing sagging during loading of a satellite into a thermal vacuum chamber for

In the case of satellites performing missions in the space environment, they are designed on the ground, mounted on a launch vehicle, and deployed in the space environment. In order to evaluate the reliability of the operation of the satellite in the space environment, the operation is checked after creating an environment similar to the space environment on the ground. At this time, in order to create an environment similar to the space environment, a thermal vacuum chamber having a structure in which an entrance with an opening on one side is formed and closed by an opening and closing door is used. More specifically, after placing a satellite or parts of a satellite assembled in the thermal vacuum chamber, an environment similar to the space environment is created inside the thermal vacuum chamber, and then the operation and physical properties of the device are evaluated. Assembled satellites or parts of satellites carried into the thermal vacuum chamber can be transported by manpower in the case of small and light weight parts and brought into the thermal vacuum chamber, but large and heavy parts cannot be transported or brought in by manpower. Therefore, it is possible to move and use a lifting device whose height is adjustable. Specifically, as shown in FIG. 2, a satellite or a component is disposed above the lifting device. Thereafter, the satellite or parts are raised and lowered by operating the lifting device to the height of the entrance to the thermal vacuum chamber. After adjusting the height of the lifting device in detail to correspond to the height of the entrance and exit of the thermal vacuum chamber, the transfer plate on which the satellite or parts are placed is moved and brought into the thermal vacuum chamber. At this time, oil leakage occurs due to reasons such as excessive weight of satellites or parts or deterioration of actuators using hydraulic pressure, gasket failure, valve leaks, and the like, and ultimately sagging of the lifting device. The sagging of the lifting device causes a problem in that the vibration and impact of the lifting device caused by the heat vacuum chamber and the height aligned with the heat vacuum chamber are damaged to damage the satellites or parts entering the heat vacuum chamber. In order to solve this problem, as disclosed in Korean Patent Publication No. 10-1684360 ("Deflection Correction Jig for Specimen Carry-In Lift of Thermal Vacuum Chamber" 2016.12.02.) Although the deflection caused by the moving table entering into the furnace was corrected through a separate jig, only the deflection of one side can be corrected, and the problem that the overall deflection of the lift system cannot be controlled still remains. Therefore, it is necessary to develop a lifting device that can precisely control the fine deflection even during the lifting and lowering of the lift system and the movement of the transfer table.

1. Korea Patent Publication No. 10-1684360 ("Deflection correction jig for lifting specimens in a thermal vacuum chamber" 2016.12.02.)

The present invention has been devised to solve the above problems, and prevents damage to the satellites and parts by using a lifting device that can be finely controlled to prevent sagging of the lifting device due to the dead weight of the satellites and parts entering the thermal vacuum chamber. To provide a lifting device and method for preventing sagging during loading of satellites in a thermal vacuum chamber.

In order to solve the above problems, a lifting device for preventing sagging during loading of a satellite into a thermal vacuum chamber of the present invention includes: a lower plate including a plurality of moving parts moving in contact with the ground on which they are disposed; an upper plate disposed parallel to the upper side of the lower plate; an elevating unit including a bar-shaped first elevating bar and a second elevating bar formed therebetween, the first elevating bar and the second elevating bar intersecting in an X-shape and interposed between the upper plate and the lower plate; a plurality of actuators having one end connected to the first lifting bar and the other end connected to the second lifting bar; and a control unit for respectively controlling the plurality of actuators so that the upper plate is raised and lowered by the lifting unit.

Here, the lifting device for preventing sagging during loading of the satellite into the thermal vacuum chamber may further include a plurality of displacement sensors disposed to correspond to each other at the outer portions of the lower plate and the upper plate, and the control unit uses the displacement sensor as the displacement sensor. It is characterized in that the actuator is controlled by detecting the deflection of the plate.

Here, the lifting unit, the first lifting bar has one end coupled to the lower plate, the other end is horizontally moved on the upper plate, the second lifting bar has one end coupled to the upper plate, the other end is coupled to the lower plate including horizontal movement.

In addition, the lower plate, a stopper for supporting the lower end of the second lifting bar to prevent sagging of the upper plate A stopper rail for horizontally moving the stopper and a lower rail for horizontally moving the second lifting bar. Doedoe disposed at some and each corner includes a ground fixing part fixed to the ground so as to limit the movement of the moving part.

In addition, the control unit controls the plurality of actuators so that the second lifting bar moves along the upper rail and raises or lowers the upper plate, and then the stopper supports the lower end of the second lifting bar. It characterized in that the movement of the second lifting bar is controlled to move along the lower rail.

In addition, the upper plate is a guide portion formed to extend upwardly on both sides

It includes an upper rail for horizontally moving the first lifting bar and a loading plate on which satellites or parts are loaded on the upper surface, and the control unit includes controlling the loading plate to move in parallel along the guide part.

In the method of using a lifting device for preventing sagging during loading of a thermal vacuum chamber satellite using a lifting device for preventing sagging during loading of a satellite into the thermal vacuum chamber, (a) loading a satellite or a component on a loading plate included in the upper plate to do; (b) fixing the lower plate to the ground by a ground fixing part included in the lower plate at a position spaced apart from the thermal vacuum chamber by a predetermined distance; (c) the control unit controlling each of the plurality of actuators and the lifting unit lifting or lowering the upper plate to a user-set position; (d) determining, by the control unit, whether deflection is detected in any one or more actuators among the plurality of actuators; and (e) compensating for the position of the upper plate by the control unit controlling the actuator whose sagging is determined in step (d).

Here, after the step (c), the control unit includes the step of controlling the stopper included in the lower plate to support the lower end of the second lifting bar included in the lifting unit.

In addition, the step (d) includes a displacement sensor disposed at a position corresponding to each of the upper plate and the lower plate to detect the deflection of the actuator.

Here, after step (d), when no sagging occurs in the actuator, the control unit horizontally moves the loading plate along the guide part included in the upper plate and entering the thermal vacuum chamber.

The lifting device and the method for preventing sagging during loading of the thermal vacuum chamber satellite of the present invention according to the above configuration are provided with a plurality of means for detecting the sagging of the lifting device and the sagging preventing means so that the lifting device can be finely controlled, The vibration and shock caused by the deflection of the lifting device is not transmitted to the satellite or parts, so it can minimize the damage of expensive aerospace parts and bring it into the thermal vacuum chamber. Accuracy and reliability of the space environment test in the chamber has the effect of increasing

1 is a perspective view showing a lifting device for preventing sagging during loading of a satellite in a thermal vacuum chamber of the present invention.
2 is a perspective view illustrating a lifting device and a thermal vacuum chamber for preventing sagging during loading of a thermal vacuum chamber satellite of the present invention;
Figure 3 is a side view showing the first position of the lifting device for preventing sagging while carrying in the thermal vacuum chamber satellite of the present invention.
Figure 4 is a side view showing a second position of the lifting device for preventing sagging during loading of the thermal vacuum chamber satellite of the present invention.
5 is an enlarged view showing the movement of the stopper for preventing sagging of the lifting device for preventing sagging during loading of the thermal vacuum chamber satellite of the present invention.
6 is a flowchart illustrating a method of using a lifting device for preventing sagging during loading of a thermal vacuum chamber satellite of the present invention.

Hereinafter, the technical idea of the present invention will be described in more detail with reference to the accompanying drawings.

Since the accompanying drawings are merely examples shown to explain the technical idea of the present invention in more detail, the technical idea of the present invention is not limited to the form of the accompanying drawings.

Configuration of the lifting device 1000 for preventing sagging while carrying in the thermal vacuum chamber satellite

As shown in FIG. 1, the lifting device 1000 for preventing sagging during loading of the thermal vacuum chamber satellite of the present invention is a lower plate 100, an upper plate 200, a lifting unit 300, an actuator 400), and a displacement sensor. 500 and a control unit (not shown). A detailed description of each part is as follows.

The lower plate 100 is a plurality of movement in contact with the ground so that each of the above-described components is connected or arranged, and the lifting device 1000 for preventing sagging during loading of the thermal vacuum chamber satellite can be placed at a desired place by the user. It is formed including the part 110 . The shape and structure of the lower plate 100 may vary depending on the addition or subtraction or arrangement of components, as well as the center of gravity, that is, the weight so that vibration and shock are not transmitted to the satellites disposed on the upper plate 200 . It is preferable to be formed of a material and a shape that can do this.

The upper plate 200 is disposed parallel to the upper side of the lower plate 100 serves to load the satellites or parts. Specifically, as shown in FIG. 2 , satellites or parts are loaded on the loading plate 230 included in the upper plate 200 , and the upper plate 200 is raised or lowered by the lifting unit 300 . The height of the entrance of the thermal vacuum chamber 10 and the height of the upper plate 200 are matched with each other. Thereafter, after horizontally moving the loading plate 230 into the thermal vacuum chamber 10 , the satellite is placed inside the thermal vacuum chamber 10 . Therefore, the upper plate 200 is formed in a plate shape larger than the satellite or parts, it is preferable to be formed of a shape and material that can withstand the weight.

The lifting unit 300 is interposed between the upper plate 200 and the lower plate 100 and is operated by a controller (not shown) to raise and lower the upper plate 200 . The elevating unit 300 has a bar-shaped first elevating bar 310 and a second elevating bar 320 formed in a crossed shape in an X-shape, and a scissor shape with a longer vertical moving distance compared to a horizontal moving distance. It is preferable, of course, that it can be a structure for elevating and lowering the upper plate 200 in addition to it.

A plurality of the actuators 400 are disposed in the lifting unit 300 to operate the lifting unit 300 . Specifically, according to the shape of the lifting unit 300 , one end is connected to the first lifting bar 310 , and the other end is connected to the second lifting bar 320 , taking FIG. 1 as an example, both sides of the lifting unit 300 . 4 can be placed on The actuator 400 is operated and widens or narrows between the first lifting bar 310 and the second lifting bar 320 to raise and lower the upper plate 200 . Furthermore, the actuator 400 may be measured through a control unit (not shown) by adding a separate configuration including a sensor capable of measuring sagging due to oil leakage such as aging, gasket failure, valve leak, etc. . The plurality of actuators 400 are connected to different valves, respectively, and the motors controlling the internal hydraulic pressure of the actuators 400 control the valves, respectively, to prevent deflection.

The displacement sensor 500 is disposed at positions corresponding to each other outside the lower plate 100 and the upper plate 200 . The displacement sensor 500 measures the displacement of the other one based on any one of the lower plate 100 or the upper plate 200 at the arranged position. Accordingly, with the displacement measured by the displacement sensor 500 , the deflection of the lifting device 1000 for preventing deflection during loading of the satellite into the thermal vacuum chamber may be measured. When the displacement sensor 500 detects deflection of one or more of the plurality of actuators 400, deflection information is generated and transmitted to the control unit (not shown) so that the control unit (not shown) controls the actuator 400 in which the deflection occurs. to compensate for the deflection. The displacement sensor 500 is preferably composed of an optical displacement measuring sensor using a laser or the like.

The control unit (not shown) serves to control the plurality of actuators 400 so that the upper plate 200 is raised and lowered by the lifting unit 300 . In more detail, the components operating in the lifting device 1000 for preventing sagging during loading of the thermal vacuum chamber satellite are controlled, and the actuator 400 is controlled to prevent sagging by synthesizing the information measured by each sensor among them. role as a top priority. The control of the control unit (not shown) will be dealt with in detail during the description of each component.

As shown in FIG. 2 , the lifting device 1000 for preventing sagging during loading of the satellite into the thermal vacuum chamber of the present invention is fixed to the ground at a position spaced apart from the thermal vacuum chamber 10 by a predetermined distance. Thereafter, the satellite 20 enters the inside of the thermal vacuum chamber 10 by horizontal movement of the loading plate 230 included in the upper plate 200 . The loading plate 230 is horizontally moved from the upper side of the upper plate 200, and while the satellite 20 enters the thermal vacuum chamber 10, a lifting device 1000 for preventing sagging during loading of the satellite into the thermal vacuum chamber. By preventing sagging, shock and vibration are not applied to the incoming satellite 20 . The detailed configuration of the lifting device 1000 for preventing sagging during loading of the thermal vacuum chamber satellite for driving and controlling will be dealt with in the description of FIGS. 3 and 4 .

As shown in FIG. 3 , the lifting device 1000 for preventing sagging during loading of the thermal vacuum chamber satellite of the present invention includes a lower plate 100 , an upper plate 200 , a lifting unit 300 , an actuator 400 ), and a displacement sensor. 500 and a control unit (not shown), and each unit may include detailed components. Each part including detailed components will be described in detail as follows.

The lower plate 100 includes a moving unit 110 , a stopper 120 , a moving rail unit 130 , and a ground fixing unit 140 .

The moving unit 110 serves to move the lifting device 1000 so that the lower plate 100 is in contact with the ground and prevents sagging during loading of the satellite into the thermal vacuum chamber. Accordingly, in addition to the shape shown in FIG. 3 , various configurations may be included to assist the movement of the lifting device 1000 for preventing sagging during loading of the satellite into the thermal vacuum chamber.

The stopper 120 serves to prevent sagging through mechanical coupling with the lower end of the lifting unit 300 . Specifically, after the operation of the elevating unit 300 by the control unit (not shown), the second elevating bar 320 moves in parallel on the moving rail unit 130 to the lower end position of the second elevating bar 320 , and thereafter, the second elevating bar 320 is mechanically It limits the movement displacement generated according to the deflection of the lifting unit 300 by contact. The shape and detailed operation of the stopper 120 will be dealt with in detail in the description of FIG. 5 .

The moving rail unit 130 is formed on one side of the lower plate 100 and serves to provide a coupling portion so that the second lifting bar 320 and the stopper 120 move horizontally. Specifically, the moving rail unit 130 includes a lower rail 132 for moving the second lifting bar 320 and a stopper rail 132 for horizontally moving the stopper 120 . The lower rail 132 serves to provide a coupling position that assists the horizontal movement of the second lifting bar 320 according to the movement of the lifting unit 300 . In addition, the stopper rail 132 serves to provide a coupling position that assists the horizontal movement of the stopper 120 . The movable rail unit 130 includes a second elevating bar 320 and a stopper rail 132 that can horizontally move with the stopper 120 and are fixed on the rail at the same time as a separate coupling means and coupling method. can do.

The ground fixing unit 140 serves to assist the lower plate 100 to be fixed on the ground. In detail, the floor lock function serves to prevent shock and vibration by limiting the movement of the lower plate 100 when the elevating unit 300 is raised and lowered and the satellite 20 enters the thermal vacuum chamber. As shown in FIGS. 2 and 3 , it is of course possible to have the ground fixing part 140 in various ways or in various shapes for fixing the lower plate 100 to the ground.

The upper plate 200 includes a guide part 210 , an upper rail 220 , and a loading plate 230 . The guide part 210 is formed to extend upward from both sides of the upper plate 200 .

The guide part 210 provides a coupling part that assists the horizontal movement of the loading plate 230, and the loading plate 230 serves as a guide for entering the thermal vacuum chamber. Therefore, it may include an additional configuration for the movement of the loading plate (230).

The upper rail 220 serves to provide a coupling portion that assists the horizontal movement of the first lifting bar 310 . The upper rail 220 and the first elevating bar 310 may include a separate coupling means and a coupling method fixed on the rail while being able to move horizontally on the upper rail 220 .

The loading plate 230 serves to load the satellite 20 or parts on the upper side. Furthermore, the loading plate 230 is coupled to the guide parts 210 formed on both sides of the upper plate 200 and horizontally moves along the guide part 210 to enter the satellite 20 into the thermal vacuum chamber. plays a role Therefore, as shown in FIG. 2, it is coupled with the loading unit and the guide unit 210 on which the satellites 20 or parts are loaded, and may further include a configuration of a separate moving device for horizontal movement into the thermal vacuum chamber. Of course.

The lifting unit 300 includes a first lifting bar 310 and a second lifting bar 320 . The first lifting bar 310 and the second lifting bar 320 are formed in a bar shape, crossed in an X-shape, and interposed between the upper plate 200 and the lower plate 100 .

One end of the first lifting bar 310 is coupled to the lower plate, and the other end is horizontally moved on the upper plate 200 , specifically, the upper rail 220 .

One end of the second lifting bar 320 is coupled to the upper plate, and the other end is horizontally moved on the lower plate 100 , specifically, the lower rail 131 .

The first elevating bar 310 and the second elevating bar 320 are crossed in an X shape, and an actuator 400 has one end coupled to the first elevating bar 310 and the other end of the second elevating bar The plurality of actuators 400 are controlled by a control unit (not shown) so as to be coupled with the 320 , and the upper plate 200 is raised or lowered by the operation of the lifting unit 300 . In one embodiment of the lifting device 1000 for preventing sagging during loading of the thermal vacuum chamber satellites shown in FIGS. 1 to 5 , four actuators 400 are arranged and controlled by a control unit (not shown), and sagging is prevented.

As shown in Fig. 4, the detailed operation of the lifting device 1000 for preventing sagging during loading of the satellite into the thermal vacuum chamber of the present invention will be described as follows. Referring to FIG. 3 , the upper plate 200 loads the satellite 20 on the loading plate 230 in the lowermost state or a user-set position before the operation of the lifting unit 300 . Thereafter, the lifting device 1000 for preventing sagging during loading of the satellite into the thermal vacuum chamber is moved to a position spaced apart from the thermal vacuum chamber by a predetermined distance, and then the ground fixing unit 140 is operated to fix the lower plate 100 to the ground. Thereafter, each of the plurality of actuators 400 is controlled through a control unit (not shown), and the ends of the first lifting bar 310 and the second lifting bar 320 crossed in an X-shape move away from each other and the upper plate 200 . is rising The first lifting bar 310 and the second lifting bar 320 are horizontally moved on the upper rail 220 and the lower rail 131 to which they are coupled. The driving of the first lifting bar 310 and the second lifting bar 320 is similar to that of the prior art scissor table. Thereafter, the stopper 120 moves horizontally along the stopper rail 132 in order to mechanically support the lower end of the second lifting bar 320 after the upper plate 200 is raised to a user-set position, that is, to the position of the thermal vacuum chamber. do. Thereafter, the second elevating bar 320 is in contact with the lower end, and the stopper 120 is fixed at the corresponding position to prevent the upper plate 200 from sagging according to the sagging of the actuator 400 . At the same time, the occurrence of deflection of any one of the plurality of actuators 400 is measured and determined through the displacement sensor 500, and the controller (not shown) operates the actuator 400 to compensate for this before the amount of deflection increases. have. As shown in FIG. 2 , the satellite 20 or parts loaded on the loading plate 230 enter the inside of the thermal vacuum chamber 10 according to the horizontal movement of the loading plate 230 and control the sagging during entry (not shown). City) is controlled and can continue to maintain the height corresponding to the position of the internal arrangement of the thermal vacuum chamber (10).

As shown in FIG. 5 , the lifting device 1000 for preventing sagging during loading of the thermal vacuum chamber satellite of the present invention prevents sagging through mechanical contact between the stopper 120 and the second elevating bar 320 . This is explained in detail as follows.

As shown in FIG. 5A , the positions of the second lifting bar 320 and the stopper 120 before the lifting device 1000 for preventing sagging during loading of the satellite into the thermal vacuum chamber are driven. After loading the satellite, the lifting device 1000 for preventing sagging during loading of the satellite into the thermal vacuum chamber in a short distance of the thermal vacuum chamber is operated, and the second lifting bar 320 is horizontally moved along the lower rail 131 and the lifting unit Causes the rise of 300, and eventually the upper plate 200 rises to a user-set height.

Thereafter, as shown in FIG. 5(b), in order to prevent sagging of the lifting device 1000 for preventing sagging during loading of the thermal vacuum chamber satellite that has reached a user-set height, the second elevating bar 320 is installed on the lower rail ( 131), the stopper 120 moves along the stopper rail 132 to the horizontally moved position, and as shown in FIG. contact Therefore, the stopper 120 moves along the stopper rail 132, but can have a separate configuration and control method capable of fixing the stopper 120 at a position corresponding to the movement of the second lifting bar 320, of course. to be.

As shown in FIG. 6 , the method of using the lifting device for preventing sagging during loading of the thermal vacuum chamber satellite using the lifting device 1000 for preventing sagging during loading of the thermal vacuum chamber satellite of the present invention (S1000) is the satellite loading step ( S100), the lift arrangement step (S200), the elevator control step (S300) includes an actuator deflection determination step (S400) and an actuator control step (S500). Each step is described in detail as follows. Descriptions overlapping with those of FIGS. 1 to 6 will be omitted.

The satellite loading step (S100) is a step of loading the satellite or parts on the loading plate included in the upper plate.

Thereafter, the lift arrangement step (S200) is a step in which the ground fixing part included in the lower plate is fixed to the ground by the ground fixing part at a position spaced apart from the thermal vacuum chamber by a predetermined distance.

Thereafter, the lifting unit control step (S300) is a step in which the controller controls the plurality of actuators, respectively, and the lifting unit raises or lowers the upper plate to a user-set position. At this time, in order to mechanically prevent the sagging of the lifting device 1000 for preventing sagging during the loading of the thermal vacuum chamber satellite after the lifting unit control step (S300), the control unit includes a stopper included in the lower plate in the elevating unit. 2 It may further include a stopper control step (S310) for controlling to support the lower end of the lifting bar.

Thereafter, the actuator deflection determination step (S400) is a step in which the control unit determines whether deflection is detected in any one or more actuators among a plurality of actuators. At this time, in the actuator deflection determination step (S400), a displacement sensor disposed at a position corresponding to each of the upper plate and the lower plate detects the deflection of the actuator.

Thereafter, the actuator control step (S500) is a step of compensating for the sag position of the upper plate by controlling the single actuator in which the sag is generated when the controller determines the sag in the actuator sag determining step (S400).

After the actuator control step (S500), when no deflection is detected in a single or a plurality of actuators, the control unit horizontally moves the loading plate along the guide unit and brings the satellite into the thermal vacuum chamber at a corresponding height.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and detailed description will be given. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention as claimed in the claims.

1000: Lifting device for preventing sagging while carrying in the thermal vacuum chamber satellite
100: lower plate 110: moving part
120: stopper 130: moving rail part
131: lower rail 132: stopper rail
200: upper plate 210: guide part
220: upper rail 230: loading plate
300: lifting unit 310: first lifting bar
320: second lifting bar 400: actuator
500: displacement sensor
10: thermal vacuum chamber 20: satellite

Claims (10)

a lower plate including a plurality of moving parts moved in contact with the ground to be disposed;
an upper plate disposed parallel to the upper side of the lower plate;
an elevating unit including a bar-shaped first elevating bar and a second elevating bar formed therebetween, the first elevating bar and the second elevating bar intersecting in an X-shape and interposed between the upper plate and the lower plate;
a plurality of actuators having one end connected to the first lifting bar and the other end connected to the second lifting bar; and
A control unit for controlling each of the plurality of actuators so that the upper plate is raised and lowered by the lifting unit;
A plurality of displacement sensors disposed to correspond to each other at the outer edges of the lower plate and the upper plate; further comprising,
Controlling the actuator by the control unit sensing the deflection of the upper plate with the displacement sensor
A lifting device for preventing sagging during loading of satellites in a thermal vacuum chamber, characterized in that
delete delete a lower plate including a plurality of moving parts moved in contact with the ground to be disposed;
an upper plate disposed parallel to the upper side of the lower plate;
an elevating unit including a bar-shaped first elevating bar and a second elevating bar formed therebetween, the first elevating bar and the second elevating bar intersecting in an X-shape and interposed between the upper plate and the lower plate;
a plurality of actuators having one end connected to the first lifting bar and the other end connected to the second lifting bar; and
a control unit for controlling each of the plurality of actuators so that the upper plate is raised and lowered by the lifting unit;
including,
The lower plate,
A stopper supporting the lower end of the second elevating bar to prevent sagging of the upper plate
A moving rail portion including a stopper rail for horizontally moving the stopper and a lower rail for horizontally moving the second lifting bar; and
A ground fixing part disposed at each corner and fixed to the ground to limit the movement of the moving part
A lifting device for preventing sagging during loading of satellites in a thermal vacuum chamber comprising a.
5. The method of claim 4, wherein the control unit
Controls the plurality of actuators so that the second lifting bar moves along the lower rail to raise or lower the upper plate,
Then, controlling the movement of the second lifting bar so that the stopper moves along the lower rail to a position supporting the lower end of the second lifting bar.
A lifting device for preventing sagging during loading of satellites in a thermal vacuum chamber, characterized in that
a lower plate including a plurality of moving parts moved in contact with the ground to be disposed;
an upper plate disposed parallel to the upper side of the lower plate;
an elevating unit including a bar-shaped first elevating bar and a second elevating bar formed therebetween, the first elevating bar and the second elevating bar intersecting in an X-shape and interposed between the upper plate and the lower plate;
a plurality of actuators having one end connected to the first lifting bar and the other end connected to the second lifting bar; and
a control unit for controlling each of the plurality of actuators so that the upper plate is raised and lowered by the lifting unit;
including,
The upper plate is
Guide parts extending upwards on both sides
an upper rail for horizontally moving the first lifting bar; and
Including a loading plate on which the satellite or parts are loaded on the upper surface,
Controlling the control unit to move the loading plate in parallel along the guide unit
A lifting device for preventing sagging during loading of satellites in a thermal vacuum chamber comprising a.
[Claim 7] The method of any one of claims 1, 4 to 6, wherein a lifting device for preventing sagging during loading of the satellite into the thermal vacuum chamber, comprising:
(a) loading the satellites or parts on the loading plate included in the upper plate;
(b) fixing the lower plate to the ground by a ground fixing part included in the lower plate at a position spaced apart from the thermal vacuum chamber by a predetermined distance;
(c) the control unit controlling each of the plurality of actuators and the lifting unit lifting or lowering the upper plate to a user-set position;
(d) determining, by the control unit, whether deflection is detected in any one or more actuators among the plurality of actuators; and
(e) compensating for the position of the upper plate by the control unit controlling the actuator, the deflection is determined in step (d);
A method of using a lifting device for preventing sagging during loading of a satellite into a thermal vacuum chamber comprising a.
The method of claim 7, wherein after step (c),
and controlling, by the controller, a stopper included in the lower plate to support a lower end of a second lifting bar included in the lifting unit.
The method of claim 7, wherein step (d) comprises:
A method of using a lifting device for preventing sag during loading of a satellite into a thermal vacuum chamber, comprising: a displacement sensor disposed at a position corresponding to each of the upper plate and the lower plate to detect deflection of the actuator.
The method of claim 7, wherein after step (d),
When sagging does not occur in the actuator, the control unit horizontally moves the loading plate along the guide part included in the upper plate to enter the thermal vacuum chamber. How to use a lifting device.

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