CN103818566A

CN103818566A - Modularization manufacturing method for triaxial magnetic torquer

Info

Publication number: CN103818566A
Application number: CN201410101342.2A
Authority: CN
Inventors: 刘勇; 冯乾; 杨家男; 潘泉; 朱海锋; 苏笑宇
Original assignee: Northwestern Polytechnical University
Current assignee: Northwestern Polytechnical University
Priority date: 2014-03-18
Filing date: 2014-03-18
Publication date: 2014-05-28
Anticipated expiration: 2034-03-18
Also published as: CN103818566B

Abstract

The invention discloses a modular manufacturing method of a three-axis magnetic torque device, which includes step 1, making a hollow coil; step 2, making a first magnetic rod coil and a second magnetic rod coil; step 3, making a first magnetic rod coil A connecting part and a thin plate of a second connecting part, step 4, fixing the first magnetic bar coil and the second magnetic bar coil on the thin plate through the first connecting part and a second connecting part respectively; step 5, fixing the air-core coil It is fixedly connected to the thin plate, and the hollow coil is parallel to the thin plate. The invention solves the difficulty of installation of the traditional magnetic torque device, the complicated debugging and wiring of the magnetic torque device and the attitude control circuit board, and occupies a large space, which is not conducive to the lightweight, miniaturization and modularization of micro-satellites.

Description

Modular manufacturing method of three-axis magnetic torquer

Technical Field

The invention relates to the field of micro-satellite attitude control, in particular to a modular manufacturing method of a triaxial magnetic torquer.

Background

The attitude control method of the microsatellite is various, and a common method is to use the geomagnetic field to realize the attitude control of the satellite. The method adopts a magnetic torquer as an actuating mechanism, and realizes physical movement by utilizing the principle that an electrified coil is subjected to magnetic force in a magnetic field and further generates magnetic torque. The magnetic torquer has the characteristics of light weight, low power consumption, no mass loss and stable work, and is widely applied to the attitude control system of the modern microsatellite.

In the process of researching the attitude control of the microsatellite, the inventor finds that the three-axis attitude control can be achieved by orthogonally arranging three independent magnetic torquers on the microsatellite in the modern microsatellite because the traditional magnetic torquers (whether a magnetic bar type magnetic torquer or a hollow magnetic torquer) are all single-axis. However, such an arrangement, particularly an orthogonal arrangement, has a large difficulty in mounting, a low mounting accuracy, a complicated debugging and wiring between the magnetic torquer and the attitude control circuit board, and a large space, and is not favorable for the weight reduction, miniaturization, and modularization of the microsatellite.

Disclosure of Invention

The invention aims to provide a modularized manufacturing method of a triaxial magnetic torquer, which solves the technical problems that in the triaxial attitude control of a modern microsatellite, three mutually independent magnetic torquers need to be orthogonally arranged on the microsatellite, the installation difficulty is high, the debugging and wiring of the magnetic torquers and an attitude control circuit board are complex, the space is large, and the lightweight and miniaturization of the microsatellite are not facilitated.

The invention has the technical scheme that the modular manufacturing method of the triaxial magnetic torquer comprises the following steps: step 1, manufacturing an air-core coil; step 2, manufacturing a first magnetic bar coil and a second magnetic bar coil; step 3, manufacturing a thin plate with a first connecting part and a second connecting part, wherein the first connecting part and the second connecting part are respectively used for fixing a first magnetic bar coil and a second magnetic bar coil and enabling the first magnetic bar coil and the second magnetic bar coil to be perpendicular to each other; step 4, fixing the first magnetic bar coil and the second magnetic bar coil on the thin plate through a first connecting part and a second connecting part respectively; and 5, fixedly connecting the hollow coil on the thin plate, wherein the hollow coil is parallel to the thin plate.

Further, the method further comprises: and a connecting hole is arranged at the blank of the thin plate.

Further, the air-core coil is rectangular, circular or square.

Further, the first connecting portion and the second connecting portion are disposed at the edge of the thin plate.

Further, the thin plate is a duralumin thin plate with a thickness of 1 mm.

Further, step 5 is to bond the air-core coil to the thin plate by using an aviation glue.

Further, the first connecting part is a first clamping groove; the second connecting part is a second clamping groove.

The three-axis magnetic torquer designed by the invention is a modularized whole, and comprises a hollow magnetic torquer with one axis and a magnetic bar type magnetic torquer with two axes, wherein the module comprises three orthogonal magnetic torquers, and is reserved with a mounting interface, a mounting position can be designed according to the specific size and shape of a satellite, and the three-axis magnetic torquer can be firmly mounted by means of threads or rivets, and the three-axis magnetic torquer manufactured by the method has the advantages of convenience in mounting, strong modularization, convenience in connecting with a control panel and the like.

Drawings

FIG. 1 is a schematic diagram of a three-axis magnetic torquer;

FIG. 2 is a schematic view of an air coil;

FIG. 3 is a schematic view of a magnetic core;

fig. 4 is a schematic view of a core with a wound coil.

Detailed Description

A modular manufacturing method of a three-axis magnetic torquer comprises the following steps:

step 1, manufacturing an air-core coil;

the air-core coil is rectangular, circular or square, and the purpose of the air-core coil is to generate a magnetic field perpendicular to the thin plate after being energized, so the shape is not limited to the above listed shapes, and the air-core coil is within the protection scope of the present invention as long as the above purpose can be achieved.

Step 2, manufacturing a first magnetic bar coil and a second magnetic bar coil;

step 3, manufacturing a thin plate with a first connecting part and a second connecting part, wherein the first connecting part and the second connecting part are respectively used for fixing a first magnetic bar coil and a second magnetic bar coil and enabling the first magnetic bar coil and the second magnetic bar coil to be perpendicular to each other;

in this embodiment, the thin plate is a duralumin thin plate having a thickness of 1 mm. In addition, in order to make the layout more compact and reasonable, the first connecting portion and the second connecting portion are usually disposed at the edge of the thin plate. More specifically, the first connecting part is a first card slot; the second connecting part is a second clamping groove. The object of the triaxial magnetic torquer is to generate magnetic moments in three directions orthogonal to each other, respectively, and therefore, it is a necessary condition for achieving the above object that the first and second bar coils are perpendicular to each other. If a Cartesian coordinate system is established by the plane of the thin plate, the air coil generates magnetic moment in the Z-axis direction, and the first magnetic bar coil and the second magnetic bar coil generate magnetic moment in the X-axis direction and the Y-axis direction.

Step 4, fixing the first magnetic bar coil and the second magnetic bar coil on the thin plate through a first connecting part and a second connecting part respectively;

and 5, fixedly connecting the hollow coil on the thin plate, wherein the hollow coil is parallel to the thin plate. Specifically, the air-core coil is bonded on the thin plate through the aviation glue.

In order to conveniently install the manufactured triaxial magnetic torquer on the microsatellite, a connecting hole can be formed in the blank of the thin plate so as to facilitate connection. Obviously, this connection method is not the main point of the present invention, and other connection methods, for example, embedding the three-axis magnetic torquer into the microsatellite by using a slot provided on the satellite, or adhering the three-axis magnetic torquer to the microsatellite by using glue, can be used to achieve the above-mentioned connection purpose. Fig. 1 is a schematic view of a three-axis magnetic torquer, in which reference numeral 1 is a thin plate, reference numeral 2 is a connection hole, reference numeral 3 is a first magnetic bar coil, reference numeral 4 is a second magnetic bar coil, and reference numeral 5 is an air coil.

The parameters of the air core coil, the first magnetic rod coil and the second magnetic rod coil are calculated according to the specific requirements of the microsatellite, specific design and manufacturing examples are given below, it should be noted that the following examples are merely illustrative, and the air core coil, the first magnetic rod coil and the second magnetic rod coil obtained by other methods are all within the protection scope of the invention. For simplicity of calculation, the first and second bar magnet coils are made as identical bar magnet coils:

in the first step, equations for mass, power consumption and magnetic moment of the magnetic torquer derived from physical principles are shown below.

The symbols to be used are first defined as follows: the magnetic moment of the magnetic torquer coil is M, the mass is M, the power consumption is P, the power supply voltage is U, the intensity of the electrified current is I, the resistance R of the magnetic torquer coil is a unit normal vector N vertical to the coil surface, the average side length of the magnetic torquer coil is a, the volume of the magnetic torquer coil is V, the average area surrounded by the magnetic torquer is A, the resistivity of a lead is rho, the density of the lead is gamma, the section radius of the lead is R, the length of the lead used by the magnetic torquer coil is l, and the number of turns of the lead is N.

Magnetic moment of the magnetic torquer coil:

mass of the magnetic torquer coil:

power consumption of the magnetic torquer coil:

before analyzing the magnetic moment of the bar magnet, the symbols to be used are defined as follows:

the magnetic moment of the magnetic rod is M, the mass is M, the power consumption is P, the power supply voltage is U, the intensity of the electrified current is I, the resistance R of the magnetic rod, the length of the magnetic core is l, the radius R of the magnetic core and the density Y of the magnetic core₁The radius of the whole coil is R_wVolume of the coil is V and length of the coil is l_wThe resistivity of the wire is rho, the radius of the wire is a, and the density of the wire is Y₂The number of turns of the wire is N, and the wire is magnetizedVector is M_d。

Power consumption of the magnetic bar:

magnetic moment of magnetic bar:

wherein,

N_{d} = \frac{4 (\ln \frac{l}{r} - 1)}{{(\frac{l}{r})}^{2} - 4 \ln (\frac{l}{r})}

mass of the magnetic rod:

m＝γ₂π²N(R_w+r)a²+γ₁lπr²

the second step is that: machining method for giving three-axis magnetic torquer

A. For the hollow coil, firstly, according to the design size of the hollow coil, the thickness requirement of the hollow coil is combined, a corresponding die is processed by using a hard aluminum plate, the four corners of the die are respectively provided with a radius of a certain size so as to prevent wires from being scratched when winding, and the center of the die is provided with a through hole matched with a winding machine so as to fix the die and the winding machine. Two clamping plates 1-2mm larger than the mold are selected, the two clamping plates are clamped on the mold on a winding machine to form a clamping groove, and the hollow coil is wound along the groove, as shown in figure 2.

B. For the magnetic rod coil, firstly, the iron-nickel alloy with larger magnetic permeability, larger saturation magnetic induction and smaller coercive force is selected as the magnetic core material, and the length and the section radius of the magnetic rod are selected according to the size requirement (the parameters of the magnetic core adopted in the step are that the relative magnetic permeability is 20000, the saturation magnetic induction is 1.5 Tesla, and the coercive force is 0.15 Oersted). In order to connect the core to the winding machine, a frame is required to be manufactured for connecting the core to the winding machine. One end of the frame is provided with a threaded hole matched with the winding machine to be connected with the winding machine, and the other end of the frame is provided with a hole matched with the magnetic core to fasten the magnetic core. Meanwhile, two 1-2mm clamping plates are placed at both ends of the magnetic core to form a clamping groove along which the bar coil is wound, as shown in fig. 3 and 4. FIG. 3 is a schematic view of a magnetic core; fig. 4 is a schematic view of a core with a wound coil.

C. During the winding process, epoxy is continuously applied to cure the wire. In order to prevent the excess epoxy resin from accumulating on one side of the coil, the excess epoxy resin needs to be cleaned in time in the winding process.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. a modular manufacturing method of a three-axis magnetic torque device, is characterized in that, comprises the steps:

Step 1. Make a hollow coil;

Step 2, making a first magnetic rod coil and a second magnetic rod coil;

Step 3, making a thin plate with a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are respectively used to fix the first magnetic rod coil and the second magnetic rod coil, and make the first The magnetic bar coil and the second magnetic bar coil are perpendicular to each other;

Step 4, fixing the first magnetic rod coil and the second magnetic rod coil on the thin plate through the first connecting part and a second connecting part respectively;

Step 5, fixing the air-core coil to the thin plate, and the air-core coil is parallel to the thin plate.

2 . The modular manufacturing method of a three-axis magnetic torque device according to claim 1 , wherein the method further comprises: providing connection holes in blank spaces of the thin plate. 3 .

3 . The modular manufacturing method of a three-axis magnetic torque device according to claim 2 , wherein the air-core coil is rectangular, circular or square. 4 .

4 . The modular manufacturing method of a three-axis magnetic torque device according to claim 3 , wherein the first connection part and the second connection part are arranged on the edge of the thin plate.

5 . The modular manufacturing method of a three-axis magnetic torque device according to claim 4 , wherein the thin plate is a duralumin thin plate with a thickness of 1 mm. 6 .

6 . The modular manufacturing method of a three-axis magnetic torque device according to claim 5 , wherein step 5 is specifically bonding the air-core coil to the thin plate with aviation glue. 6 .

7. The modular manufacturing method of any three-axis magnetic torque device according to any one of claims 1-6, characterized in that, the first connecting part is a first slot; the second connecting part is a second Two card slots.