阅读说明：本技术 一种面向空间电磁操控的可控超导磁场发生装置 (Controllable superconducting magnetic field generating device for space electromagnetic control ) 是由 杨乐平 张元文 黄涣 甄明 于 2020-04-15 设计创作，主要内容包括：一种面向空间电磁操控的可控超导磁场发生装置,包括运动平台、控制系统以及超导线圈组件,所述超导线圈组件用于产生电磁场,超导线圈组件安装在运动平台上,由运动平台支撑且通过运动平台实现超导线圈组件的三自由度运动控制。超导线圈组件包括真空杜瓦筒体、超导线圈、线圈骨架、液氮腔以及线圈引线。利用高温超导材料绕制超导线圈组件中的电磁线圈,可在常导材料线圈同等尺寸和匝数下,生成十几倍乃至几十倍大的电磁场,能够显著提升空间电磁操控效果。真空杜瓦筒体管壁中包覆有真空保温层,其内为填充有液氮的液氮腔,超导线圈和线圈骨架置于液氮腔内,可在满足高温超导材料低温环境的同时有效减少热交换,提升超导线圈运行的稳定性与长久性。(A controllable superconducting magnetic field generating device facing space electromagnetic control comprises a motion platform, a control system and a superconducting coil assembly, wherein the superconducting coil assembly is used for generating an electromagnetic field, the superconducting coil assembly is installed on the motion platform, and three-degree-of-freedom motion control of the superconducting coil assembly is realized through the motion platform and supported by the motion platform. The superconducting coil assembly comprises a vacuum Dewar cylinder, a superconducting coil, a coil framework, a liquid nitrogen cavity and a coil lead. The electromagnetic coil in the superconducting coil assembly is wound by using the high-temperature superconducting material, so that an electromagnetic field which is dozens of times or even dozens of times as large as the coil made of the normal-conducting material can be generated under the condition of the same size and the number of turns of the coil made of the normal-conducting material, and the space electromagnetic control effect can be remarkably improved. The pipe wall of the vacuum Dewar cylinder body is coated with a vacuum heat-insulating layer, a liquid nitrogen cavity filled with liquid nitrogen is formed in the vacuum Dewar cylinder body, the superconducting coil and the coil framework are arranged in the liquid nitrogen cavity, heat exchange can be effectively reduced while the low-temperature environment of a high-temperature superconducting material is met, and the running stability and durability of the superconducting coil are improved.)

1. A controllable superconducting magnetic field generating device for space electromagnetic control is characterized in that: the superconducting coil assembly is used for generating an electromagnetic field under the control of the control system, is arranged on the motion platform, is supported by the motion platform and realizes the motion control of the superconducting coil assembly through the motion platform.

2. The controllable superconducting magnetic field generating device facing space electromagnetic steering according to claim 1, characterized in that: the motion platform comprises a supporting underframe, a servo guide rail, a turntable support, a servo turntable and a mounting base, the superconducting coil assembly is mounted on the mounting base, the mounting base is fixed on the servo turntable, and the servo turntable is used for realizing the rotation control of the superconducting coil assembly; the servo turntable is arranged above the servo guide rail through a turntable support, and the turntable support can move along the guide rail direction of the servo guide rail so as to drive the superconducting coil assembly to realize linear motion control; the servo guide rail is mounted on the support chassis and supported by the support chassis.

3. The controllable superconducting magnetic field generating device facing space electromagnetic steering according to claim 2, characterized in that: the superconducting coil assembly comprises a vacuum Dewar cylinder, a superconducting coil, a coil framework, a liquid nitrogen cavity and a coil lead; the inside of the vacuum Dewar cylinder body is a liquid nitrogen cavity filled with liquid nitrogen, and the superconducting coil and the coil framework are arranged in the liquid nitrogen cavity, wherein the superconducting coil is wound on the coil framework; the vacuum Dewar cylinder is provided with a lead socket, the inner joint and the outer joint of the superconducting coil are connected with a coil lead, and the coil lead supplies power at the lead socket through a 110A constant current source, so that the superconducting coil generates a magnetic field.

4. The controllable superconducting magnetic field generating device facing space electromagnetic steering according to claim 3, characterized in that: and the inner side wall of the vacuum Dewar cylinder body is coated with a vacuum heat-insulating layer.

5. The controllable superconducting magnetic field generating device facing space electromagnetic steering according to claim 3, characterized in that: the vacuum Dewar cylinder is provided with a liquid nitrogen filling opening for filling liquid nitrogen into the liquid nitrogen cavity, and the liquid nitrogen is injected into the liquid nitrogen cavity through the liquid nitrogen filling opening by using a self-pressurization liquid nitrogen tank; the bottom center of the vacuum Dewar cylinder body is fixedly connected with an installation base, and the surface of the installation base is subjected to insulation treatment.

6. Controllable superconducting magnetic field generating device facing spatial electromagnetic steering according to any of claims 3 to 5, characterized in that: the superconducting coil assembly further comprises 2 temperature sensors arranged in the liquid nitrogen cavity, wherein the number of the temperature sensors is PT100, and the temperature sensors are respectively arranged at the topmost part of the superconducting coil and the intersection of the liquid nitrogen cavity and the liquid nitrogen filling port.

7. The controllable superconducting magnetic field generating device facing space electromagnetic steering according to claim 6, wherein: the length of the servo guide rail is 1100mm, and the positioning precision of the guide rail direction is 0.1 mm; the stroke of the servo turntable ranges from-180 degrees to +180 degrees, and the rotation precision is 0.1 degree.

8. The controllable superconducting magnetic field generating device facing space electromagnetic steering according to claim 6, wherein: the superconducting coil is made of a high-temperature superconducting tape and mainly comprises Bi-2223/Ag; the superconducting coil is wound in a single-wire single-cake mode, the inner diameter of the coil is 1m, the wire consumption is 800m, and the critical current of the superconducting coil is 85A.

9. The controllable superconducting magnetic field generating device facing space electromagnetic steering according to claim 6, wherein: the control system is used for controlling the superconducting magnetic field and the motion of the superconducting coil device; the control system comprises a superconducting magnetic field control module and a servo control module;

the superconducting magnetic field control module comprises a coil current control unit, a coil temperature monitoring unit and a coil voltage monitoring unit; the coil current control unit is connected with a coil lead wire through a constant current source; the coil temperature monitoring unit is realized by 2 paths of AD acquisition cards, and the 2 paths of AD acquisition cards are respectively connected with 1 temperature sensor; the liquid level position of the liquid nitrogen is determined according to the temperature of the PT100 sensor, and when the temperature is higher than 80K, the liquid nitrogen needs to be supplemented, so that the superconducting coil is always soaked in the liquid nitrogen; the coil voltage monitoring unit comprises a 1-path AD acquisition card, the 1-path AD acquisition card is connected with a coil lead, and whether the superconducting coil is in a superconducting state or not is judged by acquiring the voltage at two ends of the superconducting coil so as to prevent the superconducting coil from being burnt during quench;

the motion control is realized through a servo control module, and the servo control module is respectively connected with a servo guide rail and a servo turntable to realize linear motion control and azimuth rotation control.

10. A space-oriented electromagnetic control ground test system, which is characterized by comprising the space-oriented electromagnetic control controllable superconducting magnetic field generating device as claimed in any one of claims 1 to 9, and is used for generating a required controllable electromagnetic field.

Technical Field

The invention belongs to the technical field of space electromagnetic control and ground test simulation thereof, and particularly relates to a controllable superconducting magnetic field generating device for space electromagnetic control.

Background

At present, the number of orbit fragments including invalid satellites is more and more, great threats are brought to the safety operation of human aerospace activities and in-orbit spacecrafts, and therefore the acceleration of the in-orbit control technology research for catching, maintaining, off-orbit and other tasks has important significance. In order to smoothly carry out on-orbit control tasks such as approach capture, the position/attitude of a failed satellite needs to be controlled to reach an expected relative state; however, the traditional contact type control means has short action distance, great control difficulty and high safety risk, and the non-contact on-orbit control means is widely concerned in recent years.

Space electromagnetic control is a representative non-contact on-orbit control mode, a satellite-borne electromagnetic device is utilized to generate a controllable electromagnetic field, and non-contact field force is generated through interaction between the electromagnetic field and a target or the electromagnetic field, so that control of relative position/posture is realized. Since the electromagnetic field strength decays inversely with the distance power of 4, in order to obtain a more ideal non-contact control effect, a spacecraft is required to be capable of generating a high-strength electromagnetic field. For the traditional electromagnetic coil based on the normally conducting material, the diameter and the number of turns of the coil can only be increased, so that the magnetic field generating device is large in size and heavy in mass, and great challenges are brought to the overall design of the spacecraft.

The explosive development of superconducting technology has brought new eosins for spatial electromagnetic manipulation. By adopting the superconducting coil technology, an electromagnetic field with strength of dozens or even dozens of times can be generated on the premise of the same coil diameter and turns, so that the magnitude of the inter-satellite electromagnetic force/moment is greatly improved, and the non-contact control effect is remarkably improved. In addition, in order to meet the electromagnetic control requirements of different targets and different motion states, the electromagnetic field strength needs to be flexible and controllable, and the maneuvering control capability of the relative position/posture of the electromagnetic field strength and the target is achieved. At present, the superconducting technology of a test system related to electromagnetic butt joint and electromagnetic racemization developed on the ground is not verified and applied, and some test schemes adopting permanent magnets cannot realize flexible control of a magnetic field, so that the method has limitations in the aspect of further analyzing electromagnetic control mechanisms and characteristics. Therefore, designing a device capable of generating controllable large-field-strength electromagnetic fields and simulating relative motion is a technical problem to be solved in the field.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a controllable superconducting magnetic field generating device facing space electromagnetic control, which utilizes a high-temperature superconducting technology to realize generation of a controllable high-field-intensity electromagnetic field.

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

a controllable superconducting magnetic field generating device facing space electromagnetic control comprises a motion platform, a control system and a superconducting coil assembly, wherein the superconducting coil assembly is used for generating an electromagnetic field under the control of the control system, the superconducting coil assembly is installed on the motion platform, supported by the motion platform and used for realizing the motion control of the superconducting coil assembly through the motion platform.

As a preferred scheme, the motion platform comprises a supporting underframe, a servo guide rail, a turntable support, a servo turntable and a mounting base, wherein the superconducting coil assembly is mounted on the mounting base which is fixed on the servo turntable, and the servo turntable is used for realizing the rotation control of the superconducting coil assembly; the servo turntable is arranged above the servo guide rail through a turntable support, and the turntable support can move along the guide rail direction of the servo guide rail so as to drive the superconducting coil assembly to realize linear motion control; the servo guide rail is mounted on the support chassis and supported by the support chassis.

As the preferred scheme, the superconducting coil assembly in the invention comprises a vacuum Dewar cylinder, a superconducting coil, a coil framework, a liquid nitrogen cavity and a coil lead; the inside of the vacuum Dewar cylinder body is a liquid nitrogen cavity filled with liquid nitrogen, and the superconducting coil and the coil framework are arranged in the liquid nitrogen cavity, wherein the superconducting coil is wound on the coil framework. The vacuum Dewar cylinder is provided with a lead socket, the inner joint and the outer joint of the superconducting coil are connected with a coil lead, and the coil lead supplies power at the lead socket through a 110A constant current source, so that the superconducting coil generates a magnetic field. The superconducting coil is placed in a liquid nitrogen cavity, and low-temperature maintenance of the superconducting coil is achieved by filling liquid nitrogen. Furthermore, the inside wall of the vacuum Dewar cylinder body is coated with a vacuum heat-insulating layer, so that heat exchange can be effectively reduced, and the refrigeration effect is improved.

The vacuum Dewar cylinder body is provided with a liquid nitrogen filling opening for filling liquid nitrogen into the liquid nitrogen cavity. And injecting liquid nitrogen into the liquid nitrogen cavity through a liquid nitrogen filling opening by using a self-pressurization liquid nitrogen tank (the working pressure is 0.09 Mpa). The bottom center of the vacuum Dewar cylinder body is fixedly connected with the mounting base, and in order to avoid magnetic field interference caused by other metal parts, the surface of the mounting base needs to be subjected to insulation treatment. Further, the liquid nitrogen temperature sensor also comprises a temperature sensor arranged in the liquid nitrogen cavity. Specifically, the number of the temperature sensors is 2, the temperature sensors are respectively arranged at the topmost part of the superconducting coil and the intersection of the liquid nitrogen cavity and the liquid nitrogen filling port, the liquid level position of the liquid nitrogen is determined according to the temperature of the PT100 sensor, the liquid nitrogen needs to be supplemented when the temperature is higher than 80K, and the superconducting coil is guaranteed to be always soaked in the liquid nitrogen during working.

Preferably, the servo guide rail in the invention has a length of 1100mm and a positioning precision of 0.1mm in the guide rail direction. The stroke of the servo turntable ranges from-180 degrees to +180 degrees, and the rotation precision is 0.1 degree.

Preferably, the superconducting coil is made of a high-temperature superconducting tape, and the main component of the superconducting coil is Bi-2223/Ag. The superconducting coil is wound in a single-wire single-cake mode, the inner diameter of the coil is 1m, the wire consumption is 800m, and the critical current of the superconducting coil is 85A (77K, self-field).

Preferably, the control system is used for controlling the superconducting magnetic field and the movement of the superconducting coil device. The control system comprises a superconducting magnetic field control module and a servo control module.

The superconducting magnetic field control module comprises a coil current control unit, a coil temperature monitoring unit and a coil voltage monitoring unit. The coil current control unit is realized by connecting a constant current source with a coil lead. The coil temperature monitoring unit is realized by 2 paths of AD acquisition cards, and the 2 paths of AD acquisition cards are respectively connected with 1 temperature sensor; the liquid level position of the liquid nitrogen is determined according to the temperature of the PT100 sensor, and the liquid nitrogen needs to be supplemented when the temperature is higher than 80K, so that the superconducting coil is always soaked in the liquid nitrogen. The coil voltage monitoring unit comprises a 1-path AD acquisition card, the 1-path AD acquisition card is connected with a coil lead, and whether the superconducting coil is in a superconducting state or not is judged by acquiring the voltage at two ends of the superconducting coil, so that the superconducting coil is prevented from being burnt during quenching.

The motion control is realized through a servo control module, and the servo control module is respectively connected with a servo guide rail and a servo turntable to realize linear motion control and azimuth rotation control.

The invention can be applied to various space-oriented electromagnetic control ground test systems, including but not limited to electromagnetic docking and electromagnetic despinning ground test systems. The controllable superconducting magnetic field generating device facing the space electromagnetic control is used for generating a required controllable large-field-intensity electromagnetic field in a ground test system facing the space electromagnetic control.

Compared with the prior art, the method has the advantages and beneficial effects that:

the invention provides a specific scheme of a controllable superconducting magnetic field generating device for space electromagnetic control. The electromagnetic coil wound by the high-temperature superconducting material can generate an electromagnetic field which is dozens of times or even dozens of times larger than the normal-conducting material coil under the condition of the same size and the same number of turns of the normal-conducting material coil, and the space electromagnetic control effect can be obviously improved. The designed vacuum Dewar structure and the liquid nitrogen refrigeration scheme can effectively reduce heat exchange while meeting the low-temperature environment of a high-temperature superconducting material, and improve the stability and the durability of the operation of a superconducting coil. The servo guide rail and the servo rotary table can realize three-degree-of-freedom motion control of the superconducting coil device, and provide a more effective magnetic field generating device for developing an electromagnetic control ground test and analyzing an electromagnetic control mechanism and characteristics.

Drawings

Fig. 1 is a schematic structural diagram of a controllable superconducting magnetic field generating device for space electromagnetic steering according to an embodiment of the present invention.

Fig. 2 is a top view of a controllable superconducting magnetic field generating device for space electromagnetic steering according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a superconducting-coil apparatus according to an embodiment of the present invention.

FIG. 4 is a diagram illustrating a winding method of a superconducting coil according to an embodiment of the present invention.

Fig. 5 is a control system diagram of a controllable superconducting magnetic field generating device for space electromagnetic steering according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of a ground test system for applying the present invention to electromagnetic-eddy current racemization.

The numbering in fig. 1 to 5 illustrates: the device comprises a supporting underframe 1, a control box 2, a control line 3, a servo guide rail 4, a turntable support 5, a servo turntable 6, an installation base 7, a superconducting coil assembly 8, a lead socket 9, a liquid nitrogen filling port 10, a vacuum Dewar cylinder 11, a superconducting coil 12, a coil framework 13, a vacuum heat-insulating layer 14, a liquid nitrogen cavity 15, a coil lead 16 and a temperature sensor 17.

The numbering in fig. 6 illustrates: 601 is a rotary platform support, 602 is an air injection support, 603 is a screwing left air nozzle, 604 is a screwing right air nozzle, 6605 is a fan wheel, 606 is a laser tachometer, 607 is a horizontal fine adjustment block, 608 is a dynamic seal air leakage port, 609 is a high-precision air bearing, 610 is a marble table, 611 is a positioning cone, 612 is a seal groove, 613 is an air suction hole, 614 is a taper sleeve locking mechanism, 615 is a space target simulation piece, 616 is a vacuum cover body, 617 is a tower type multi-layer cover plate, and 618 is a self-locking bolt.

Detailed Description

In order to make the technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.