CN108240902A - A kind of test device and test method of electromagnetic torque device - Google Patents
A kind of test device and test method of electromagnetic torque device Download PDFInfo
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- CN108240902A CN108240902A CN201611226343.5A CN201611226343A CN108240902A CN 108240902 A CN108240902 A CN 108240902A CN 201611226343 A CN201611226343 A CN 201611226343A CN 108240902 A CN108240902 A CN 108240902A
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- external electrode
- electromagnetic torque
- torque device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention discloses a kind of test devices and test method of electromagnetic torque device, including cylindrical condenser, cylindrical condenser is made of coaxial horizontally disposed inner and outer electrodes, external electrode hangs on vertical spring beam bottom, adjustment frame is provided at the top of spring beam, spring beam and interior electrode connect voltage source jointly, and voltage source is connected with controller, and the controller is connected with current source and laser interferometer；External electrode one end is provided with connecting rod, and the other end is provided with the plane mirror for reflected laser signals.The present invention is inputted using electrostatic force as standard testing, using balancing method as test philosophy, realizes the linearity test to electromagnetic torque device.
Description
Technical field
The present invention relates to the testing fields of power actuator, and in particular, to a kind of test device of electromagnetic torque device and survey
Method for testing.
Background technology
Electromagnetic torque device has a wide range of applications as a kind of power actuator, is such as used for thrust part, the quartz of spacecraft
Dynamic balance mechanism of flexure accelerometers etc..The performance of electromagnetic torque device is to the gesture stability of spacecraft, especially to quartz flexible
The measurement accuracy of accelerometer has great influence.
In existing electromagnetic torque device test method, electromagnetic torque device is intended only as a component of system under test (SUT), with it
Together as integrated testability, test result is not solely used for the self-characteristic of evaluation electromagnetic torque device for his component.In addition, test
Input is using weight component as standard volume.It is general using 12 points or 24 points rollings in the test of quartz flexible accelerometer torquer
Method.Accelerometer is fixed on a high-precision turntable, is obtained not on different angular position, accelerometer sensitive axis
Same gravitational acceleration component, is tested in this, as input.This component of acceleration as standard volume is not one
The standard volume that can accurately reappear in different time, different location.
Invention content
The purpose of the invention is to overcome deficiency of the prior art, provide a kind of electromagnetic torque device test device and
Test method is inputted using electrostatic force as standard testing, using balancing method as test philosophy, realizes the linearity to electromagnetic torque device
Test, during test, the electrostatic force of input is acted directly on the pendulum of tested electromagnetic torque device, and laser interferometer detects pendulum in real time
The change in location of piece, and the electromagnetic force that electromagnetic torque device generates and electrostatic dynamic balance are controlled, pendulum is allowed to be in equilbrium position always,
So as to establish the relationship of proof force input and the output of electromagnetic torque device.
The purpose of the present invention can be achieved through the following technical solutions.
A kind of test device of electromagnetic torque device of the present invention, including cylindrical condenser, the cylindrical condenser is by coaxial
Horizontally disposed inner and outer electrodes are formed, and the external electrode hangs on vertical spring beam bottom, is set at the top of the spring beam
Adjustment frame is equipped with, the spring beam and interior electrode connect voltage source jointly, and the voltage source is connected with controller, the controller
It is connected with current source and laser interferometer；Described external electrode one end is provided with connecting rod, and the other end is provided with for reflection laser
The plane mirror of signal.
The interior electrode is set as cylindrical, and the external electrode is set as cylindrical shape, and the external electrode is horizontal in an axial direction to be transported
It is dynamic.
The plane mirror is parallel to dispatch from foreign news agency perpendicular to external electrode axis, the optical axis of the laser interferometer outgoing beam
Polar axis line, the laser interferometer detect the axial displacement of external electrode by plane mirror.
The purpose of the present invention can be also achieved through the following technical solutions.
A kind of test method of electromagnetic torque device, includes the following steps：
Step 1, installs the test device of the electromagnetic torque device described in claims 1 to 3, and the external electrode passes through connection
The pendulum of bar and tested electromagnetic torque device is rigidly connected, and the current source is connected with the magnet exciting coil of tested electromagnetic torque device；
Step 2 adjusts the position relationship of pendulum and external electrode, and pendulum and the spring beam of fixed external electrode is made to be in respectively
Self-balancing position, voltage source output voltage u=0, the balanced balanced current i=0 of current source output record the survey of laser interferometer at this time
Magnitude x0；
Step 3, controller control voltage source output voltage u=U1, the external electrode generation axial displacement of cylindrical condenser,
Pendulum is driven to deviate equilbrium position, then the measured value of laser interferometer is x0+ Δ x, controller is according to the laser interferometer adopted
Output valve, control current source output balanced balanced current i=I1, pendulum is made to turn again to equilbrium position by electromagnetic force, i.e. Δ x reduces
It is zero；
Step 4, record pendulum return to voltage source output voltage values U during equilbrium position1Balanced balanced current is exported with current source
Value I1；
Step 5 changes the value of voltage source output voltage u, and repeat the above steps three and step 4, obtains n groups Um-Im(m=
1,2,3 ..., n, n are positive integer) data, fit the u that characterization is tested electromagnetic torque device input-output characteristic2- i relation curves,
And calculate the nonlinear error value of tested electromagnetic torque device.
Compared with prior art, advantageous effect caused by technical scheme of the present invention is：
(1) in the present invention, the initial axial position relationship of inner and outer electrodes can be adjusted by adjusting frame, interior
Electrode is motionless, and external electrode is only axially moved, and voltage source applies a voltage on interior electrode, then interior electrode, external electrode
Between generate axial electrostatic force, push external electrode axial movement, and then drive the pendulum axial movement of tested electromagnetic torque device, swash
Optical interferometer detects the axial displacement of external electrode by plane mirror, and current source gives tested electromagnetic torque device to provide a balance
Electric current makes the pendulum generation of tested electromagnetic torque device and the displacement of electrostatic force opposite direction, when acquisition pendulum returns to equilbrium position
Balanced balanced current value and voltage source voltage value, realize electromagnetic torque device characteristic test, tested electromagnetic torque device can be evaluated
Input-output characteristic；
(2) present invention is inputted using electrostatic force as standard testing, using balancing method as test philosophy, is realized to electromagnetic torque device
Linearity test, during test, the electrostatic force of input is acted directly on the pendulum of tested electromagnetic torque device, and laser interferometer is real
When detect the change in location of pendulum, and electromagnetic force and the electrostatic dynamic balance that electromagnetic torque device is controlled to generate, pendulum is allowed to be in always
Equilbrium position, so as to establish the relationship of proof force input and the output of electromagnetic torque device, can to the linearity of electromagnetic torque device into
The high-precision test of row.
Description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the operation principle schematic diagram of the present invention.
Reference numeral:1 external electrode；Electrode in 2；3 spring beams；4 adjustment frames；5 connecting rods；
6 plane mirrors；7 laser interferometer；8 voltage sources；9 current sources；10 controllers；
11 tested electromagnetic torque devices；11-1 permanent magnets；11-2 magnet exciting coils；11-3 pendulums.
Specific embodiment
Technical scheme of the present invention is further described below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, the test device of a kind of electromagnetic torque device of the invention, including cylindrical condenser, the circle
Column capacitor is made of coaxial horizontally disposed interior electrode 2 and external electrode 1, and the interior electrode 2 is set as cylindrical, the dispatch from foreign news agency
Pole 1 is set as cylindrical shape.The interior electrode 2 is fixed, and the external electrode 1 hangs on vertical 3 bottom of spring beam, the elasticity
Beam 3 provides elastic bearing to external electrode 1, and 3 top of spring beam is provided with adjustment frame 4, and external electrode 1 only has one degree of freedom,
I.e. along its axial wobble, the initial axial position relationship of the interior electrode 2 and external electrode 1 can be adjusted by adjusting frame 4.
Connection voltage source 8, the voltage source 8 are connected with 10 (PC machine of controller jointly for the spring beam 3 and interior electrode 2
Deng), the controller 10 is also associated with current source 9 and laser interferometer 7.The controller 10 automatically controls the defeated of voltage source 8
Go out the output current in voltage and current source 9, and acquire the displacement measurement of laser interferometer 7.The controller 10 controls electricity
Potential source 8 applies a voltage to cylindrical condenser, makes to generate axial electrostatic force between interior electrode 2 and external electrode 1, then external electrode 1
Generate corresponding axial displacement.Current source 9 is connected with the magnet exciting coil 11-2 of tested electromagnetic torque device 11, and the controller 10 is controlled
Current source 9 processed gives tested electromagnetic torque device 11 to provide a balanced balanced current, generates the pendulum 11-3 of tested electromagnetic torque device 11
With the displacement of electrostatic force opposite direction.
Described 1 one end of external electrode is provided with the connecting rod 5 for connecting tested electromagnetic torque device 11, and when test is tested electromagnetism
The pendulum 11-3 of torquer 11 is rigidly connected by connecting rod 5 and external electrode 1.1 other end of external electrode is provided with for anti-
The plane mirror 6 of laser signal is penetrated, the plane mirror 6 is emitted perpendicular to 1 axis of external electrode, the laser interferometer 7
The optical axis of light beam is parallel to 1 axis of external electrode, and the laser interferometer 7 detects the axial position of external electrode 1 by plane mirror 6
It moves.
The cylindrical condenser can be as the electrostatic force generating means of the present invention, the plane mirror 6 and laser interference
Instrument 7 can be used as adjustment of the invention as the displacement detector of the present invention, the connecting rod 5, adjustment frame 4 and spring beam 3
Attachment device, the voltage source 8, current source 9 and controller 10 can be as the drive dynamic control devices of the present invention.
If the internal diameter R of external electrode 11, the outer diameter R of interior electrode 22, R1>R2, reference axis x-axis is parallel to the axis of external electrode 1,
Then external electrode 1 can only be along x-axis motion in one dimension.When external electrode 1 is in a certain position, cylindrical condenser capacitance is denoted as C.If
Electrode 2, external electrode 1 apply voltage u, then the electrostatic force F generated between the two in cylindrical condenserq, meet relational expression
Wherein,For capacitance gradient, and
ε is the dielectric constant of 1 interior electrode 2, external electrode medium in formula.So electrostatic force FqIt is represented by
To mounted cylindrical condenser, when interior electrode 2,1 axial position of external electrode remain unchanged, capacitance gradient value
It can be considered constant, then electrostatic force FqSize and u2It is directly proportional.
Tested electromagnetic torque device 11 is a kind of power actuator component, mainly by magnet exciting coil 11-2, permanent magnet 11-1 and pendulum
Piece 11-3 is formed.Tested electric current i of the electromagnetic torque device 11 using in magnet exciting coil 11-2 exports electromagnetic force F as inputB.Excitation
Coil 11-2 is fixed on pendulum 11-3, and in the uniform magnetic field that permanent magnet generates.When magnet exciting coil 11-2 inputs are electricity
I is flowed, then suffered electromagnetic force FBFor
FB=iBL (4)
B is magnetic induction intensity in formula, and L is the winding length of magnet exciting coil.Electromagnetic force FBIt acts on pendulum 11-3, due to pendulum
11-3 is cantilever beam structure form, so showing as moment loading, pendulum 11-3 is pushed to deviate equilbrium position.Given is tested
Electromagnetic torque device 11, electric current i and electromagnetic force FBIt is linear, so typically directly representing tested electromagnetic torque with electric current i values
The output of device 11.
Voltage source 8 provides driving voltage for cylindrical condenser, and the balanced balanced current of tested electromagnetic torque device 11 is carried by current source 9
For.The output valve of voltage source 8 and current source 9 is controlled by controller 10.Before test, by pendulum 11-3 by connecting rod 5 and outside
Electrode 1 is rigidly connected, makes the electrostatic force F of cylindrical condenserqIt is acted on pendulum 11-3 by connecting rod 5.The horizontal peace of connecting rod 5
Dress, guarantee effect power is along the x-axis direction.
One plane mirror 6 is installed in the end face of external electrode 1, plane mirror 6 is vertical with x-axis.Laser interferometer 7 goes out
The optical axis of irradiating light beam is parallel to x-axis, and by plane mirror 6, external electrode 1 and pendulum 11-3 can be by the displacement of x-axis direction
Laser interferometer 7 measures obtain in real time, and is acquired by controller 10.During test, controller 10 controls voltage source 8 to cylinder capacitance
Device loads a DC voltage Uk, then external electrode 1 by an axial direction electrostatic force FqkFor
External electrode 1 and pendulum 11-3 is pushed to generate axial displacement increment Delta Xk, the direction of motion is depending on interior 2 external electrode of electrode
1 axial position relationship.When controller 10 collects axial displacement increment Delta X by laser interferometer 7k, controller 10 controls electricity
Stream source 9 exports balanced balanced current IkSo that the electromagnetic force F of tested 11 output of electromagnetic torque deviceBkWith electrostatic force FqkBalance, i.e.,
FBk=IkBL=-Fqk (6)
Pendulum 11-3 turns again to equilbrium position, Δ Xk=0.The above process automatically controls realization by controller 10.By public affairs
Formula (5) and (6) can obtain,
Formula (7) describes the test philosophy of electromagnetic torque device of the present invention, i.e., is inputted using electrostatic force as standard,
Using balanced balanced current (characterization electromagnetic force) as output, the characteristic test of electromagnetic torque device is realized.As long as it can be seen that obtain Uk 2-IkIt is bent
Line, it is possible to the input-output characteristic of the tested electromagnetic torque device 11 of evaluation.
Based on above-mentioned technical proposal, electromagnetic torque device test method of the present invention includes the following steps：
The test device of above-mentioned electromagnetic torque device is installed, adjusted to step 1, and the external electrode 1 is by connecting rod 5 with being tested
The pendulum 11-3 rigid connections of electromagnetic torque device 11, can drive pendulum 11-3 to be axially moved along external electrode 1.It is electrode 2 in adjustment, outer
The initial position of electrode 1, and ensure that pendulum 11-3 is in equilbrium position.7 optical axis direction of laser interferometer is parallel to external electrode 1
It is axial, that is, it is parallel to the direction of motion of external electrode 1.The current source 9 is connected to tested electromagnetic torque device with magnet exciting coil 11-2
11 provide torque current, are denoted as balanced balanced current i.
Step 2 adjusts the pendulum 11-3 of tested electromagnetic torque device 11 and the position relationship of external electrode 1, make pendulum 11-3 and
The spring beam 3 of fixed external electrode 1 is in respective equilbrium position, at this point, pendulum 11-3, connecting rod 5 and external electrode 1 are in the axial direction
Resultant force is zero, voltage source 8 output voltage u=0, the balanced balanced current i=0 that current source 9 exports, record laser interferometer 7 at this time
Measured value x0；
Step 3, controller 10 control 8 output voltage u=U of voltage source1, the external electrode 1 of cylindrical condenser generates axial position
It moves, pendulum 11-3 is driven to deviate equilbrium position, then the measured value of laser interferometer 7 is x0+ Δ x, controller 10 is according to adopting
7 output valve of laser interferometer, by position feedback, control current source 9 exports balanced balanced current i=I1, pendulum is made by electromagnetic force
11-3 turns again to equilbrium position, i.e. Δ x is reduced to zero, and the above process is realized automatically by 10 closed loop of controller.
Step 4, record pendulum 11-3 return to the 8 output voltage values U of voltage source during equilbrium position1It is flat with the output of current source 9
Weigh current value I1；
Step 5 changes the value of 8 output voltage u of voltage source, and repeat the above steps three and step 4, obtains n groups Um-Im(m
=1,2,3 ..., n, n are positive integer) data, data processing is carried out, calculates test result, fits the tested electromagnetic torque of characterization
The u of 11 input-output characteristic of device2- i relation curves, and calculate the nonlinear error value of tested electromagnetic torque device 11.
Although the function and the course of work of the present invention are described above in conjunction with attached drawing, the invention is not limited in
Above-mentioned concrete function and the course of work, above-mentioned specific embodiment is only schematical rather than restricted, ability
The those of ordinary skill in domain is not departing from present inventive concept and scope of the claimed protection situation under the enlightenment of the present invention
Under, many forms can also be made, these are belonged within the protection of the present invention.
Claims (4)
1. a kind of test device of electromagnetic torque device, which is characterized in that including cylindrical condenser, the cylindrical condenser is by coaxial
Horizontally disposed inner and outer electrodes are formed, and the external electrode hangs on vertical spring beam bottom, is set at the top of the spring beam
Adjustment frame is equipped with, the spring beam and interior electrode connect voltage source jointly, and the voltage source is connected with controller, the controller
It is connected with current source and laser interferometer；Described external electrode one end is provided with connecting rod, and the other end is provided with for reflection laser
The plane mirror of signal.
2. the test device of a kind of electromagnetic torque device according to claim 1, which is characterized in that the interior electrode is set as
Cylinder, the external electrode are set as cylindrical shape, external electrode horizontal movement in an axial direction.
3. the test device of a kind of electromagnetic torque device according to claim 1, which is characterized in that the plane mirror hangs down
Directly in external electrode axis, the optical axis of the laser interferometer outgoing beam is parallel to external electrode axis, and the laser interferometer is led to
Cross the axial displacement of plane mirror detection external electrode.
A kind of 4. test method of the test device of the electromagnetic torque device based on described in claims 1 to 3, which is characterized in that packet
Include following steps：
Step 1, install claims 1 to 3 described in electromagnetic torque device test device, the external electrode by connecting rod with
The pendulum rigid connection of tested electromagnetic torque device, the current source are connected with the magnet exciting coil of tested electromagnetic torque device；
Step 2 adjusts the position relationship of pendulum and external electrode, is in the spring beam of pendulum and fixed external electrode respectively flat
It weighs position, voltage source output voltage u=0, the balanced balanced current i=0 of current source output, the measured value of record laser interferometer at this time
x0；
Step 3, controller control voltage source output voltage u=U1, the external electrode of cylindrical condenser generates axial displacement, with movable pendulum
Piece deviates equilbrium position, then the measured value of laser interferometer is x0+ Δ x, controller according to the laser interferometer output valve adopted,
Control current source output balanced balanced current i=I1, pendulum is made to turn again to equilbrium position by electromagnetic force, i.e. Δ x is reduced to zero；
Step 4, record pendulum return to voltage source output voltage values U during equilbrium position1With current source output balanced balanced current value I1；
Step 5 changes the value of voltage source output voltage u, and repeat the above steps three and step 4, obtains n groups Um-Im(m=1,2,
3 ..., n, n are positive integer) data, fit the u that characterization is tested electromagnetic torque device input-output characteristic2- i relation curves, and count
Calculate the nonlinear error value of tested electromagnetic torque device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611226343.5A CN108240902A (en) | 2016-12-27 | 2016-12-27 | A kind of test device and test method of electromagnetic torque device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611226343.5A CN108240902A (en) | 2016-12-27 | 2016-12-27 | A kind of test device and test method of electromagnetic torque device |
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| CN108240902A true CN108240902A (en) | 2018-07-03 |
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| CN201611226343.5A Pending CN108240902A (en) | 2016-12-27 | 2016-12-27 | A kind of test device and test method of electromagnetic torque device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484633A (en) * | 2020-11-20 | 2021-03-12 | 重庆华渝电气集团有限公司 | Device and method for measuring quadrature error of torquer coil |
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| CN112484633A (en) * | 2020-11-20 | 2021-03-12 | 重庆华渝电气集团有限公司 | Device and method for measuring quadrature error of torquer coil |
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