CN208715502U - A kind of micro-current sun sensor simulator - Google Patents
A kind of micro-current sun sensor simulator Download PDFInfo
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- CN208715502U CN208715502U CN201820960548.4U CN201820960548U CN208715502U CN 208715502 U CN208715502 U CN 208715502U CN 201820960548 U CN201820960548 U CN 201820960548U CN 208715502 U CN208715502 U CN 208715502U
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Abstract
The utility model discloses a kind of micro-current sun sensor simulators, are related to satellite attitude control technical field.It include: that circuit occurs for programmable DAC module, voltage follower circuit and 12 road constant-current sources, programmable DAC module exports linear accurate voltage corresponding with sun sensor all quadrants equivalence value into voltage follower circuit, after accurate voltage is increased driving capability by voltage follower circuit, it is exported respectively to 12 road constant-current sources and is occurred in circuit, 12 road constant-current sources occur circuit and respectively correspond the equivalent load for exporting total 12 quadrants in single 3 face of sun sensor, it realizes in no sun sensor, calibration and function, performance test to control subsystem processing circuit and digital circuit.With in the prior art, directly compared using the mode that sun sensor carries out ground equivalent test, using micro-current sun sensor simulator provided by the embodiment of the utility model, have many advantages, such as that at low cost, simple to operate, high reliablity, resistance to environment capacity are strong.
Description
Technical field
The utility model relates to satellite attitude control technical field more particularly to a kind of micro-current sun sensor simulators.
Background technique
Currently, need when satellite attitude control subsystem ground equivalent tests sun sensor using true sun sensor, this
Mode has 4 disadvantages: 1) sun sensor cost is too high；2) sun sensor itself is easy to be led to performance very by environmental pollution
To function damage；3) it when equivalent test, needs manual operation using light source, test is caused to bother；4) since the intensity of light source can not
Control causes equivalent test without standard measure.
Utility model content
The purpose of this utility model is to provide a kind of micro-current sun sensor simulators, to solve in the prior art
Existing foregoing problems.
To achieve the goals above, the technical solution adopted in the utility model is as follows:
A kind of micro-current sun sensor simulator, comprising: programmable DAC module, voltage follower circuit and 12 tunnel constant currents
Circuit occurs for source, and the programmable DAC module exports linear accurate voltage corresponding with sun sensor all quadrants equivalence value, and
The accurate voltage is exported into the voltage follower circuit, the voltage follower circuit, which increases the accurate voltage, to be driven
It after ability, is exported respectively to constant-current source described in 12 tunnels and circuit occurs, constant-current source described in 12 tunnels occurs circuit and respectively corresponds output list
A 3 face of sun sensor amounts to the equivalent load of 12 quadrants.
Preferably, the voltage follower circuit is made of operational amplifier, by the output end of the operational amplifier and instead
Phase input terminal is shorted to form negative sense feedback, and feedback factor 1, output end voltage is equal with non-inverting input terminal voltage.
Preferably, circuit occurs per the constant-current source all the way includes negative-feedback circuit, positive-feedback circuit and voltage-limiting protection
Circuit, the negative-feedback circuit and the positive-feedback circuit act on operational amplifier simultaneously, and the pressure limited protection circuit is by head
The connected diode composition of tail, as the fashionable limitation output voltage range of output within ± 0.7V.
The beneficial effects of the utility model are: micro-current sun sensor simulator provided by the embodiment of the utility model,
Include: that circuit occurs for programmable DAC module, voltage follower circuit and 12 road constant-current sources, may be programmed DAC module output and the sun
For the corresponding linear accurate voltage of sensor all quadrants equivalence value into voltage follower circuit, voltage follower circuit increases accurate voltage
It after adding driving capability, is exported respectively to 12 road constant-current sources and is occurred in circuit, 12 road constant-current sources occur circuit and respectively correspond output list
A 3 face of sun sensor amounts to the equivalent load of 12 quadrants, realizes in no sun sensor, to control subsystem processing electricity
The calibration of road and digital circuit and function, performance test.With in the prior art, ground equivalent directly is carried out using sun sensor
The mode of test is compared, and using micro-current sun sensor simulator provided by the embodiment of the utility model, has at low cost, behaviour
Make simple and convenient, high reliablity, the advantages that resistance to environment capacity is strong.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of micro-current sun sensor simulator provided by the utility model；
Fig. 2 is voltage follower circuit figure；
Fig. 3 is that circuit diagram occurs for single channel constant-current source；
In Fig. 1, the meaning of each symbol is as follows:
Circuit occurs for 1 programmable DAC module, 2 voltage follower circuits, 3 constant-current sources；
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing, to this reality
It is further elaborated with novel.It should be appreciated that the specific embodiments described herein are only used to explain that this is practical
It is novel, it is not used to limit the utility model.
As shown in Figure 1, the utility model embodiment provides a kind of micro-current sun sensor simulator, comprising: can compile
Circuit 3 occurs for journey DAC module 1, the road constant-current source of voltage follower circuit 2 and 12, and the programmable output of DAC module 1 is quick with the sun
The corresponding linear accurate voltage of sensor all quadrants equivalence value, and the accurate voltage is exported into the voltage follower circuit 2,
After the accurate voltage is increased driving capability by the voltage follower circuit 2, is exported respectively to constant-current source described in 12 tunnels and electricity occurs
Constant-current source described in 3,12 tunnel of road occurs circuit 3 and respectively corresponds the equivalent load for exporting total 12 quadrants in single 3 face of sun sensor.
The working principle of the micro-current sun sensor simulator of above structure are as follows:
A) it may be programmed DAC module access house keeping computer communication, require to calculate need according to test closed loop by house keeping computer
The sun sensor all quadrants equivalence value wanted, and control programmable DAC module and export corresponding linear accurate voltage, voltage supplied with
It is used with circuit.
B) voltage follower circuit is built using high-precision JFET output operational amplifier OP215, has voltage follower defeated
Enter the advantage that impedance is big, output impedance is small, ensure that voltage accuracy does not lose, circuit occurs for subsequent constant-current source and uses.
C) constant-current source generation circuit is made of high-precision JFET output operational amplifier OP215 and precision resistance, using just
Precision current output is realized in negative-feedback, and increases its driving capability using triode amplification, uses diode and voltage-stabiliser tube pressure limiting.
Micro-current sun sensor simulator provided by the utility model is provided with 12 road constant-current sources altogether and circuit occurs, and shares an electricity
Pressure follows circuit, i.e., voltage follower circuit, which exports voltage respectively to 12 road constant-current sources, occurs to exactly correspond to the sun in circuit
3 face of sensor, 4 quadrant of every face amount to 12 paths, so that the output equivalent that circuit occurs for 12 road constant-current sources is quick in the sun
The output of sensor.
So micro-current sun sensor simulator provided by the embodiment of the utility model has micro-current programmable control
It the characteristics of system, impedance matching and adaptation satellite interface, can be realized in no sun sensor, to control subsystem processing electricity
The calibration of road and digital circuit and function, performance test.
It verifies after tested, this simulator performance and interface features and sun sensor material object unanimously, can be used as preferably too
Positive sensor simulator uses.
Moreover, directly being compared using the mode that sun sensor carries out ground equivalent test in the prior art, using this
Utility model embodiment provide micro-current sun sensor simulator, have at low cost, simple to operate, high reliablity,
The advantages that resistance to environment capacity is strong.
As shown in Fig. 2, the voltage follower circuit 2 is made of operational amplifier in the present embodiment, by the operation amplifier
The output end and inverting input terminal of device are shorted to form negative sense feedback, feedback factor 1, output end voltage and non-inverting input terminal electricity
Press equal, i.e. U2=U1。
As shown in figure 3, it includes negative-feedback circuit, positive and negative feed that circuit 3, which occurs, per the constant-current source all the way in the present embodiment
Road and pressure limited protection circuit, the negative-feedback circuit and the positive-feedback circuit act on operational amplifier, the pressure limiting simultaneously
Protection circuit is made of end to end diode, as the fashionable limitation output voltage range of output within ± 0.7V.
Circuit theory occurs for constant-current source are as follows: input voltage U2Pass through resistance R1It is changed into electric current IR1, net defeated due to amplifier
Entering voltage and current is zero, therefore is had:
VP=VN (1)
IR1=IR3 (2)
IR2=IR4 (3)
Thus feature can obtain:
(U2-VP)/R1=(VP-U3)/R3 (4)
U4=VP×(R2+R4)/R2 (5)
According to KCL (kirchhoff electric current theorem):
IL=IR5-IR4
=IR5-IR2 (6)
IR2=VP/R2 (7)
IR5=(U3-U4)/R5 (8)
Work as R1=R2,R3=R4+R5When, it can be obtained by above-mentioned formula
Export electric current IL=-(R3×U2)/(R1×R5)
As it can be seen that output electric current ILWith input voltage U2It is proportional, it is thus achieved that the effect of voltage control constant current output.
Specific embodiment:
The micro-current sun sensor etc. designed and produced the embodiment of the invention provides a kind of satellite for XX-5 model
Device is imitated, this simulator has been used for control subsystem factory, Acceptance Test, and replaces too in satellite system cascade timing as load
Positive sensor uses, and realizes equivalent closed loop algorithm and control.
Wherein the area A is programming DAC module connector (connecting with the area G (house keeping computer))；The area B is service area；The area C is 12
Circuit occurs for road constant-current source；The area D is calibration calibration area；The area E is high impedance voltage circuit region；The area F is equivalent output interface area.
By taking control subsystem is tested as an example, in use, passing through the area A by programming output controllable accurate voltage to DAC module
It is input to simulator plate, circuit occurs for control constant-current source after voltage follower circuit increases driving, exports the single sun by the area F
3 face of sensor amounts to the equivalent load of 12 quadrants, realizes in no sun sensor, to control subsystem processing circuit and number
The calibration of circuit and function, performance test, are verified after tested, this simulator performance and interface features and sun sensor material object one
It causes, can be used as ideal sun sensor simulator and use.
By using above-mentioned technical proposal disclosed by the utility model, following beneficial effect: the utility model has been obtained
The micro-current sun sensor simulator that embodiment provides, comprising: programmable DAC module, voltage follower circuit and 12 tunnel constant currents
Circuit occurs for source, may be programmed DAC module and exports linear accurate voltage corresponding with sun sensor all quadrants equivalence value to voltage
It follows in circuit, after increasing driving capability by voltage follower circuit, is exported respectively to 12 road constant-current sources and occurred in circuit, 12 tunnels
Constant-current source occurs circuit and respectively corresponds the equivalent load for exporting total 12 quadrants in single 3 face of sun sensor, realizes without too
Calibration and function, performance test when positive sensor, to control subsystem processing circuit and digital circuit.With in the prior art,
It is directly compared using the mode that sun sensor carries out ground equivalent test, using micro-current provided by the embodiment of the utility model
Sun sensor simulator has many advantages, such as that at low cost, simple to operate, high reliablity, resistance to environment capacity are strong.It is described above
It is only preferred embodiments of the present invention, it is noted that for those skilled in the art, do not taking off
Under the premise of from the utility model principle, several improvements and modifications can also be made, these improvements and modifications should also regard practical
Novel protection scope.
Claims (3)
1. a kind of micro-current sun sensor simulator characterized by comprising programmable DAC module, voltage follower circuit and
Circuit occurs for 12 road constant-current sources, and the programmable DAC module exports linear essence corresponding with sun sensor all quadrants equivalence value
Cipher telegram pressure, and the accurate voltage is exported into the voltage follower circuit, the voltage follower circuit will be described accurate electric
It after pressure increases driving capability, is exported respectively to constant-current source described in 12 tunnels and circuit occurs, circuit difference occurs for constant-current source described in 12 tunnels
The corresponding equivalent load for exporting single 3 face of sun sensor and amounting to 12 quadrants.
2. micro-current sun sensor simulator as described in claim 1, which is characterized in that the voltage follower circuit is by transporting
It calculates amplifier to constitute, the output end of the operational amplifier and inverting input terminal is shorted to form negative sense feedback, feedback factor
It is 1, output end voltage is equal with non-inverting input terminal voltage.
3. micro-current sun sensor simulator as described in claim 1, which is characterized in that occur per the constant-current source all the way
Circuit includes negative-feedback circuit, positive-feedback circuit and pressure limited protection circuit, the negative-feedback circuit and the positive-feedback circuit
Operational amplifier is acted on simultaneously, the pressure limited protection circuit is made of end to end diode, as the fashionable limitation of output
Output voltage range is within ± 0.7V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820960548.4U CN208715502U (en) | 2018-06-21 | 2018-06-21 | A kind of micro-current sun sensor simulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820960548.4U CN208715502U (en) | 2018-06-21 | 2018-06-21 | A kind of micro-current sun sensor simulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208715502U true CN208715502U (en) | 2019-04-09 |
Family
ID=65971895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820960548.4U Active CN208715502U (en) | 2018-06-21 | 2018-06-21 | A kind of micro-current sun sensor simulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208715502U (en) |
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2018
- 2018-06-21 CN CN201820960548.4U patent/CN208715502U/en active Active
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